Transcript Слайд 1 - Science and Technology Center in Ukraine
Physico-technological institute of metal and alloys of NAS Ukraine Donetsk National Technical University
Novel low-cost Ti-containing aluminothermic materials
Alexander Mekhed HannoverMesse 2007
We are developing:
environmentally clean
cost affordable
reproducible technology for production of TiAl and FeTi alloys for use in stainless steel alloying
Portable ESCR Furnace …unique design by Paton Institue…
Volume of the furnace working chamber, l Melting capacity, kg Average productivity for oxidized material, kg/h Supply-line voltage, V Total power, kVA Re-melting current, not more than, А The Installation dimensions, mm: Mass, kg 30 70 30 380 130 3000
length width height
2000 2300 2200 2450
Aluminothermic reduction of Ti with low Fe content from molten ilmenite
Ilmenite Graphite electrode
Al
Ti oxides
Molten slag including particles of reduced metal Iron, reduced from ilmenite Metalothermic melt
Stages of the Ti extraction process
Comparison with Traditional Process Flow
Traditional process Ukrainian process
Process with solid start Powdery charge + FeTi scrap
Ti 30%
with scrap adding
Ti O 20-28%
no scrap added
0,8%*
Process with liquid start Molten ilmenite
O 2,0% N 0,001%* FeTi N 0,15%
Costs 10% decreased
FeTi
Refinement from N and O
Specialty steel production Specialty steel
*Confirmed in Aachen University by prof. Friedrich
Proposed approach of production high-purity Ti-base alloys melting of ilmenite concentrate
ATR Ti-base Master Alloy Pressing with or without Ti sponge, Al granules
graphite refractory coating
Chamber ESR
slag CaF
2 – Ca
water-cooled electrode holder
Ar Ar H 2 O H 2 O Industrial Chambre ESR furnace based on ESR U-578 Ingot of γ-TiAl alloy as homogeneous as possible
Main advantages of Ukrainian approach
no igniter components in aluminothermic melt resulting in safer process handling
profitable conditions for reduction reaction running
obtaining high Ti content in oxide melt without additional expensive Ti scrap
costs 10% less due to Al savings and no Ti scrap required
higher metal yield
purity of produced Ti-base alloy regarding content of gases (0.8% Oxygen, 0.001% Nitrogen) and non metallic inclusions
less additional refinement operation
Thank You for Your Attention For more details please contact Dr. Vladyslav M. Sokolov
Physico-Technological Institute of Metals and Alloys of the National Academy of Sciences of Ukraine 34/1 Vernadsky Ave.
Kiev-142, 03680, Ukraine tel.: (+38 044) 4246057 fax: (+38 044) 4241210 e-mail: [email protected]
Prof. Anatoly D. Ryabtsev
Donetsk National Technical University 58, Artyom Street, 83000 Donetsk, Ukraine tel.: (+38 062) 3053262 fax: (+38 062) 3053262 e-mail: [email protected]