Method for manufacturing metal from fine-grain metal-oxide material

Patent · Tue Feb 28 00:00:00 EST 1984

OSTI ID:6686947

Edstrom, J O; Gorling, K G

A method for producing fine-grain iron-containing metal oxide material, the method comprising a first reduction stage wherein the oxide material is at least partially reduced in a fluidized state at a temperature of approximately 1025/sup 0/-1275/sup 0/ K. by a reducing gas which is carbon monoxide or carbon monoxide mixed with hydrogen, followed by a smelting and final reduction stage to form a metal melt, the reducing gas used for the first reduction stage obtained from the smelting and final reduction stage. Prior to the first reduction stage, relatively large cakes or shaped pieces are formed from the fine-grain metal-oxide material in the presence of moisture and a hydraulic binder and the cakes or pieces caused to harden. The hardened oxide material is disintegrated and classified to form the starting material for the first reduction stage and is given a particle size distribution such that the material forms a fluidized bed which is substantially stationary at the considerable gas velocity required to carrying out the reduction process without bogging at the temperature selected for the first reduction stage.

• Assignee: SKF Steel Engineering AB (Sweden)
• Patent Number(s): US 4434001
• OSTI ID: 6686947
• Resource Relation: Patent Priority Date: Priority date 10 Nov 1980, Sweden; Other Information: PAT-APPL-403517
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON
PRODUCTION
IRON OXIDES
REDUCTION
BINDERS
CARBON MONOXIDE
FLUIDIZATION
FLUIDIZED BED
GRANULAR MATERIALS
HYDROGEN
POWDER METALLURGY
SMELTING
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
IRON COMPOUNDS
MATERIALS
METALLURGY
METALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360101* - Metals & Alloys- Preparation & Fabrication