METHOD FOR EVALUATING THERMAL PLASTICITIES OF COAL AND CAKING ADDITIVE AND METHOD FOR PRODUCING COKE

摘要

Thermal plasticity of coals and caking additives are measured while simulating the environment that will surround the thermally plastic coals and caking additives in a coke oven, whereby the thermal plasticity of coals and caking additives can be evaluated more accurately by a simple method. The invention provides a method for evaluating thermal plasticity of coals and caking additives, and a method for producing coke using the measured values. The invention involves a method for evaluating thermal plasticity of coals and caking additives, including packing a coal or a caking additive into a vessel to prepare a sample 1; arranging a through-hole material 2 having through-holes from top to bottom surfaces, onto the sample 1; heating the sample 1 at a predetermined heating rate while maintaining a constant volume of or while applying a constant load onto the sample 1 and the through-hole material 2; measuring the permeation distance with which the molten sample has permeated into the through-holes; and evaluating thermal plasticity of the sample using the measured value. Alternatively, a method involves heating the sample 1 at a predetermined heating rate while maintaining the sample 1 and the through-hole material 2 in a constant volume; measuring the pressure of the sample that is transmitted via the through-hole material 2; and evaluating thermal plasticity of the sample using the measured value.