Method for co-producing fuel and iron

Details Method for co-producing fuel and iron Method for co-producing fuel and iron

1995-11-08

1996-06-25

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75493, 75494, 75505, 75958, C21B 1312

Patent

active

055295991

ABSTRACT:
A method for the co-production of fuel and iron from coal and from iron ore respectively, which is comprised of heating the coal in the absence of oxygen to make a raw coal gas and a residual coke, and of increasing the content of free hydrogen in the coal gas through the cracking against a desulfurizing hot reagent, of the hydrocarbons contained in the gas in order to yield a hydrogen rich, desulfurized, hot reducing synthetic gas. This synthetic gas which is highly reactive, is fed through a bed of iron ore in order to directly reduce the ore to metallized iron. The off-gas exiting from the bed of ore is divided into three parts:-a first part is mixed with the raw coal gas, and is recycled for further use; a second part is used to provide the thermal energy required for the heating of the coal to make the raw gas and the coke; and a third part which is purged to maintain the process in balance, is utilized for other thermal needs. The coke when made from metallurgical coal can be used as fuel for making iron in a blast furnace; the coke when made from non-metallurgical coal is gasified to make an additional gas which can be used as a fuel for generating electricity. Other carbonaceous materials may be added to the coal.

REFERENCES:
patent: 3844766 (1974-10-01), Beggs
patent: 4927430 (1990-05-01), Calderon

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