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US4325731A Process of producing reducing gas from solid fuels 失效
从固体燃料生产还原气的工艺

Process of producing reducing gas from solid fuels
Abstract:
A process for reducing an ore which comprises:(A) gasifying a solid carbonaceous granular fuel by contacting the same in a fixed bed with oxygen and steam at a pressure of 5 to 50 bars;(B) subjecting the gas produced from said gasification to shift conversion in order to reduce the residual carbon monoxide content to 1 to 10 percent by volume of dry gas(C) scrubbing the gaseous shift conversion gas to remove sulfur compounds and to reduce the CO.sub.2 content to no more than 3 percent by volume whereby to provide a scrubbed gas containing more than 70 percent by volume hydrogen and carbon monoxide which gas contains more than 10 percent by volume methane(D) admixing the so scrubbed gas with reduction process exhaust gas formed by reduction of ore(E) reforming the resultant mixture of gases at a pressure of 1.5-10 bars a temperature of 800.degree. to 1500.degree. C.; and(F) feeding at least a portion of such gas containing up to 3 percent by volume CO.sub.2 and 5 percent by volume methane at 700.degree.-1000.degree. to an ore-reducing plant and therein contacting said ore therewith.
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