More out of ore! THE APPLICATION OF STEEL BELT TECHNOLOGY FOR THE SINTERING OF MANGANESE ORE FINES
More out of ore!
THE APPLICATION OF STEEL BELT TECHNOLOGY FOR THE SINTERING
OF MANGANESE ORE FINES
TESTED ORES
MAIN PHASES OF SINTER• Mn3O4, manganese oxide• Mn2AlO4, manganese aluminium oxide• MnO, manganosite• Mn2SiO4, tephroite
20151050-5-10-15-20-25
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Mn-C -O Phase Stability Diagram at 1350 C
File: C:\HSC3\MNCO1350.IPS log pCO2(g)
log pO2(g)
Mn
MnC2
MnCO3
MnO
MnO2
Mn2O3
Mn3O4
• Sintering tests• Agglomeration with bentonite• Variation of
• coke• gas amounts and temperatures• retention times
• Analysis• chemical• structure• modified Tumbler-test
TEST PROSEDUREPILOT SCALE
TEST EQUIPMENT
SINTER FEED
BEFORE AGGLOMERATION
AFTER AGGLOMERATION
PRODUCT SINTER
Sintering temperature profile
Carbonate type ore MnO2 type ore
Bixbyite/Braunite type ore
Pressure difference in tests
Production scheme
CO GAS UTILISATION
PRODUCTSINTER
MICRO PELLETISING
S INTERING
GAS CLEANING
· FINES· COKE DUST· DUST· BENTONITE
MIXING
S MELTING
Fe Mn
· SINTER· COKE· FLUX
WATER TREATMENT S LAG CASTING
FERROMANGANESE PLANT
PROCESS FLOWSHEET
18 AUGUST 1997 / JIV
GAS CLEANINGDUST TO DOSING
SCRUBBING WATERS AND COOLING WATERS TO CONSUMPTION P OINTS
RAW WATER
RIVER/ WELL
SETTLING POND
SLURRY FROMSCRUBBERS
COOLING AIR FANS
CO-GAS
CO-GAS
THIS DRAWING AND DESIGN, INCLUDING ANY PATENTED ORPATENTABLE FEATURES, EMBODIES CONFIDENTIAL INFOR-MATION OF OUTOKUMPU OY AND ITS USE IS CONDITIONEDUPON USERS AGREEMENT NOT TO REPRODUCE THE DRAWING OR DESIGN, IN WHOLE OR IN PART, NOR THEMATERIAL, DESCRIBED THEREON, NOR TO USE THE DRAWINGOR DESIGN FOR ANY PURPOSE OTHER THAN SP ECIFICALLYPERMITTED IN WRITING BY OUTOKUMPU OY
CO-GASFAN
BOTTOM LAYERSINTER
CRUSHING
CO- gas forother purposesthan sinte ring
FINE COKE
CO-GAS
CHARGE
PREHEATING
Steelbelt Sintering Furnace (Cr)
Plant layout for chromite (basis for Mn)
SINTERING FURNACE (Mn)
SCHEMATIC DRAWING OF SINTERING
CONCLUSIONS
• Temperature control (/profile) important in drying and in sintering
• Moisture / coke / cooling air circulation• Coke fines/dust required
• Coal volatiles can block the bed or burn near steel belt• Pressure difference
• In sintering lower than with chromite sintering but higher in drying
• CO-gas from closed smelting furnace can be utilised • Saving of coke fines
THANK YOU OF YOUR ATTENTION
Saimaa Ringed Seal