A METHOD FOR FABRICATING ASH-FREE COAL AND ASH-FREE COAL, AND A METHOD FOR FABRICATING ANODE COKE FOR ALUMINUM SMELTING PROCESS AND ANODE COKE

摘要

PURPOSE: A method for manufacturing ashless coal, ashless coal, a method for manufacturing cokes for a cathode in an aluminum refining process using the ashless coal, and cokes for a cathode are provided to reduce the amount of inorganic components and heavy metal in coal by including ash-free coal as a cathode material for a Hall-Heroult process. CONSTITUTION: A method for manufacturing ashless coal comprises the steps of: mixing raw coal with solvent, extracting the mixture, removing metal ion, and thermally decomposing the extracted mixture, wherein the raw coal is one or more selected from the group consisting of lignite, sub-bituminous coal, bituminous coal, and anthracite with an ash content of 1-50% and the solvent is single or mixed solvent selected from the group consisting of 1-Methyl naphthalene, N-Methyl-2-pyrrolidone, CS2, light cycle oil, and tetralin.