novel low-cost ti-containing aluminothermic materials physico-technological institute of metal and...
TRANSCRIPT
Novel low-cost Novel low-cost
Ti-containing Ti-containing
aluminothermic aluminothermic
materialsmaterials
Physico-technological institute of metal and alloys of NAS UkraineDonetsk National Technical University
HannoverMesse 2007HannoverMesse 2007
Alexander MekhedAlexander Mekhed
We are developing:We are developing:
environmentallyenvironmentally cleanclean
cost affordable cost affordable
reproducible reproducible
technology for production of TiAl and FeTi technology for production of TiAl and FeTi
alloys for use in stainless steel alloyingalloys for use in stainless steel alloying
Portable ESCR FurnacePortable ESCR Furnace…unique design by …unique design by
Paton Institue…Paton Institue…
Volume of the furnace working chamber, l
30
Melting capacity, kg 70
Average productivity for oxidized material, kg/h
30
Supply-line voltage, V 380
Total power, kVA 130
Re-melting current, not more than, А
3000
The Installation dimensions, mm:
lengthwidthheight
200023002200
Mass, kg 2450
Aluminothermic reduction Aluminothermic reduction of Ti with low Fe content of Ti with low Fe content
from molten ilmenitefrom molten ilmenite
Graphite electrode
Iron, reduced
from ilmenite
Ilmenite
Ti oxides
Metalothermicmelt
Al
Molten slag including
particles of reduced metal
Stages of the Ti extraction Stages of the Ti extraction processprocess
Comparison with Traditional Comparison with Traditional Process FlowProcess Flow
Specialty steelproduction
FeTi
Process with solid start
+Powdery charge
FeTi scrap
Process with liquid start
Molten ilmeniteTi20-28% no scrap no scrap addedadded
O 0,8%*
N 0,001%*
Costs 10% Costs 10% decreaseddecreased
FeTi
Specialty steel
Refinement from N and O
Ti30%
with scrap with scrap addingadding
O 2,0%
N 0,15%
*Confirmed in Aachen University by prof. Friedrich
Traditional process Ukrainian process
Proposed approach of production Proposed approach of production high-purity Ti-base alloyshigh-purity Ti-base alloys
melting of ilmenite concentrate
Ti-base Master Alloy
Pressing with or without Ti sponge,
Al granules
Ingot of γ-TiAl alloy as homogeneous as
possible
graphite
refractory coating
water-cooledelectrode holder
H2O
Ar
H2O
Ar
slag CaF2 – Ca
Chamber ESR
Industrial Chambre ESR
furnace based on
ESR U-578
ATRATR
Main advantages of Ukrainian Main advantages of Ukrainian approachapproach
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 AttentionThank You for Your Attention
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, Ukrainetel.: (+38 044) 4246057 fax: (+38 044) 4241210 e-mail: [email protected]
Prof. Anatoly D. Ryabtsev
Donetsk National Technical University
58, Artyom Street, 83000 Donetsk, Ukrainetel.: (+38 062) 3053262 fax: (+38 062) 3053262
e-mail: [email protected]
For more details please contact