Patent ID: 8790420
Filing Date: 2014-07-29
Classification: C10L,C21B,Y02P

Abstract:
1. A method for producing a reduced metal using upgraded coal for metallurgy produced by extracting coal with an organic solvent, the method comprising: mixing the coal to be extracted with the organic solvent to obtain a raw material slurry; aging the raw material slurry with heating to extract a soluble component of the coal in the organic solvent at 0.5 MPa to 1.5 MPa in a nitrogen atmosphere to produce an extracted slurry; removing the organic solvent from the extracted slurry by evaporation to obtain the upgraded coal for metallurgy as a solid form; wherein removal of the solvent comprises: sedimentation of an insoluble component of the coal by allowing the extracted slurry to stand and separate to a supernatant containing an extracted coal, which is the extracted soluble component, and a residual coal slurry containing a residual coal, which is the sedimented insoluble component followed by evaporation of the organic solvent from the supernatant; compounding the extracted coal and residual coal to obtain the upgraded coal for metallurgy having a higher thermal plasticity than that of the coal to be extracted; mixing the upgraded coal for metallurgy and a metal oxide raw material containing a metal oxide to prepare a mixture; and reducing the mixture by heating to produce a reduced metal as a reduced metal mixture.