Transcript Use of Mill Tests for Milling Optimization

USE OF MILL TESTS FOR
MILLING OPTIMIZATION
HAROLD S. BIRKETT
MILL TEST METHOD
• COLLECT CANE GOING INTO MILL
• COLLECT BAGASSE OUT OF EACH MILL
• ANALYZE SAMPLES FOR:
– MOISTURE (DRY)
– POL (BLENDER)
– FIBER (BLENDER, WASH, DRY)
MILL TEST METHOD
• PLOT MOISTURE CURVE
• CALCULATE POL EXTRACTION AS:
POL % FIBER INTO MILL – POL % FIBER OUT MILL X 100
POL % FIBER INTO MILL
BRIX % JUICE
.
BRIX CURVE
20
18
16
14
12
10
8
6
4
2
0
1
2
3
4
MILL NUMBER
BACK
FRONT
5
6
MOISTURE % BAGASSE
.
MOISTURE CURVE
75
70
65
60
55
50
1
2
3
4
MILL NUMBER
5
6
EXTRACTION CURVE
POL EXTRACTION, % .
60
50
40
30
20
10
0
1
2
3
4
MILL NUMBER
5
6
.
MOISTURE % BAGASSE
75
70
65
60
55
50
2
3
4
5
6
1
2
MILL NUMBER
BACK
3
4
5
6
5
6
MILL NUMBER
FRONT
60
.
1
POL EXTRACTION, %
.
BRIX % JUICE
20
18
16
14
12
10
8
6
4
2
0
50
40
30
20
10
0
1
2
3
4
MILL NUMBER
BRIX % JUICE
.
BRIX CURVE
20
18
16
14
12
10
8
6
4
2
0
1
2
3
4
MILL NUMBER
BACK
FRONT
5
6
MOISTURE % BAGASSE
.
MOISTURE CURVE
75
70
65
60
55
50
1
2
3
4
MILL NUMBER
5
6
EXTRACTION CURVE
EXTRACTION, %
.
60
50
40
30
20
10
0
1
2
3
4
MILL NUMBER
5
6
.
MOISTURE % BAGASSE
75
70
65
60
55
50
2
3
4
5
6
1
2
MILL NUMBER
BACK
3
4
5
6
5
6
MILL NUMBER
FRONT
60
.
1
EXTRACTION, %
.
BRIX % JUICE
20
18
16
14
12
10
8
6
4
2
0
50
40
30
20
10
0
1
2
3
4
MILL NUMBER
BRIX % JUICE
.
BRIX CURVE
20
18
16
14
12
10
8
6
4
2
0
1
2
3
4
MILL NUMBER
BACK
FRONT
5
MOISTURE % BAGASSE
.
MOISTURE CURVE
75
70
65
60
55
50
1
2
3
MILL NUMBER
4
5
EXTRACTION CURVE
POL EXTRACTION, % .
60
50
40
30
20
10
0
1
2
3
MILL NUMBER
4
5
.
MOISTURE % BAGASSE
75
70
65
60
55
50
2
3
4
5
1
2
MILL NUMBER
BACK
FRONT
3
4
5
4
5
MILL NUMBER
60
.
1
POL EXTRACTION, %
.
BRIX % JUICE
20
18
16
14
12
10
8
6
4
2
0
50
40
30
20
10
0
1
2
3
MILL NUMBER