Method of discriminating weathered coal using oxidation heat

摘要

The present invention relates to a method for determining weathered coal in which the quality of coal used in blast furnace coke is deteriorated (oxidized), and reducing the total heat of reaction per unit mass emitted by heating the coal to a constant temperature under an oxidizing atmosphere. The purpose of the present invention is to provide a method for discriminating weathered coal more simply and efficiently in a short time by discriminating weathered coal based on whether or not it is.;The present invention is a method for discriminating weathered coal in coal, wherein the total heat of reaction per unit mass emitted by heating coal to a temperature range of 600-800 ° C. at an elevated temperature rate of 5 ° C./min or more under an oxidizing atmosphere is higher than that of uncoated coal. The main point is a method for discriminating weathered coal using heat of oxidation that determines that little coal is weathered coal.