Back to results
US 4,300,948 AGranted
Method of continuous reduction of iron oxides
AssigneeArbed S.A.
InventorPaul Metz
Life of this patent
Estimating the term…
Abstract
A method of and an apparatus for the reduction of iron oxides continuously comprises a reducing vessel through which the iron oxide is passed and in which it is contacted with a reducing gas continuously withdrawn from a coking furnace during the second phase of the coking operation in which the effluent gas is rich in carbon monoxide and hydrogen.
Claims8
A method of reducing iron oxide material which comprises the steps of:
- (a) coking coal in a coke oven for a predetermined length of time in a cokefication process and producing coke-oven gas during this length of time in said coke oven;
- (b) continuously drawing hot coke-oven gas consisting predominantly of hydrogen and carbon monoxide from said coke oven during the second half of a time of said cokefication process;
- (c) feeding iron oxide material to a reducing chamber separated from said coke oven;
- (d) continuously contacting said iron oxide material in said chamber with said coke-oven gas drawn from said coke oven to reduce said material directly at substantially the temperature at which said coke-oven gas was drawn in step (b);
- and
- (e) discharging the reduced material.
3 more elements
Dependencies are inferred from the claim text.