1) How does “Pre duster” work? Benefit calculation A) Commercial [Sand recovery => Increase!!] 1) Sales increase(amount): 100t/h x 2.7/100 X 5,000h/year X RMB50/t =
Download ReportTranscript 1) How does “Pre duster” work? Benefit calculation A) Commercial [Sand recovery => Increase!!] 1) Sales increase(amount): 100t/h x 2.7/100 X 5,000h/year X RMB50/t =
Slide 1
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 2
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 3
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 4
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 5
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 6
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 2
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 3
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 4
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 5
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10
Slide 6
1) How does “Pre duster” work?
Benefit calculation
A) Commercial
[Sand recovery => Increase!!]
1) Sales increase(amount):
100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year
New Feed
2) Filler decrease(volume):
１００ ｔ／ｈ
100t/h x 2.7/100 X 5,000h/year = 13,500t/year
B) Technical
To control the appropriate volume of -150 μm content.
Preduster
Return
22 ｍ
BM ７
Plant height
[Fine content => Decrease!!]
Dust Collector
Air Screen
２.７ｔ／ｈ
Mixer
V7 Product
77.3t/h + 2.7t/h → 80t/h
ＦＩｌｌｅｒ
22.7t/h - 2.7t/h → 20t/h (20%)
Plant footprint Width:21 ｍ / Depth:16 ｍ
2)-a) Before/After Pre-Duster
Before Pre Duster
After Pre Duster
Case 1-a / 77.3 % of recovery
Case 1-b / 80.0 % of recovery
1) Sand recovery improved by 2.7%
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
53.2
190.7
212.8
153.6
93.2
34.6
8.1
746.2
Ｖ７ product
Retained(%)
0.0%
7.1%
25.6%
28.5%
20.6%
12.5%
4.6%
1.1%
100.0%
2.77
Passed(%)
100.0%
92.9%
67.3%
38.8%
18.2%
5.7%
1.1%
0.0%
2)No increase
of
fine particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-b) Without/with Pre-Duster= 80% of sand recovery
Without Pre Duster
With Pre Duster
Case 2 / 80.0 % of recovery
Case 1-b / 80.0 % of recovery
1) Same sand recovery
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
55.1
199.2
222.5
160.9
97.5
39.0
25.8
800.0
Ｖ７ product
Retained(%)
0.0%
6.9%
24.9%
27.8%
20.1%
12.2%
4.9%
3.2%
100.0%
2.70
Passed(%)
100.0%
93.1%
68.2%
40.4%
20.3%
8.1%
3.2%
0.0%
2)Less fine
particle
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
56.1
203.3
228.4
164.3
99.6
38.1
10.3
800.1
Ｖ７ product
Retained(%)
0.0%
7.0%
25.4%
28.5%
20.5%
12.4%
4.8%
1.3%
100.0%
2.76
Passed(%)
100.0%
93.0%
67.6%
39.0%
18.5%
6.0%
1.3%
0.0%
2)-c) Grading of filler for case 1-a,1-b & 2
Case 1-a Before Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.8
11.2
10.1
9.4
14.8
149.3
201.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.4%
5.6%
5.0%
4.7%
7.3%
74.1%
100.0%
0.45
Passed(%)
100.0%
100.0%
96.6%
91.1%
86.1%
81.4%
74.1%
0.0%
Case 2 Without Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
6.2
11.0
10.0
10.0
14.0
156.4
207.6
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
3.0%
5.3%
4.8%
4.8%
6.7%
75.3%
100.0%
0.42
Case 1-b After Pre Duster
Seive Size
（mm）
10-5
5-2.5
2.5-1.2
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
-0.075
Total
FM
Weight(g)
0.0
0.0
0.0
1.6
6.1
7.5
14.3
165.4
194.9
Ｖ７ ｆiller
Retained(%)
0.0%
0.0%
0.0%
0.8%
3.1%
3.8%
7.3%
84.9%
100.0%
0.13
Passed(%)
100.0%
100.0%
100.0%
99.2%
96.0%
92.2%
84.9%
0.0%
Advantage of Pre duster on filler:
Passed(%)
100.0%
100.0%
97.0%
91.7%
86.9%
82.1%
75.3%
0.0%
1)
Decrease of filler volume.
2)
More 1.2-0.15mm size range is returned
to the sand.
This size range can improve the
workability of concrete.
2)-d)Grading curves for case 1-a,1-b & 2
Ｖ７ product
100%
90%
80%
70%
Passed(%)
60%
50%
yield ratio 77.3%
Case 1-a)
77.3%
yield
ratio
80%
Case 2)
80%
yield ratio
80%（Preduster
Case
1-b)
80%introduction）
40%
30%
20%
Sand recovery => Increased !!
10%
0%
0.075
Less fine particle !!
0.15
0.3
0.6
Seive size(mm)
1.2
2.5
5
7
10
2)-e)Grading curves for filler of case 1-a,1-b & 2
filler
100%
90%
80%
Passed(%)
70%
60%
-75μm content in the filler is 85%
50%
Good for asphalt
40%
yeild ratio 77.3%
Case 1-a) 22.7%
yeild
ratio
Case
2)80% 20.0%
Case
1-b)
20.0% introduction）
yeild
ratio
80%（Preduster
30%
20%
10%
0%
0.075 0.15
0.3
0.6
1.2
Seive Size(mm)
2.5
5 7 10