摘要:
A method for producing coke is provided which method comprising measuring the permeation distance, which is a thermal plasticity of coal, with respect to a coal or coals to be added to a coking coal blend that have a logarithmic value of Gieseler maximum fluidity, logMF, of not less than 3.0,based on a weighted-average value of the measured permeation distance(s), determining the blend ratio of the coal(s) having a logarithmic value of Gieseler maximum fluidity, logMF, of not less than 3.0, and carbonizing coals that have been blended according to the determined blend ratio.
摘要:
A method for producing coke is provided which method comprising measuring the permeation distance, which is a thermal plasticity of coal, with respect to a coal or coals to be added to a coking coal blend that have a logarithmic value of Gieseler maximum fluidity, logMF, of not less than 3.0,based on a weighted-average value of the measured permeation distance(s), determining the blend ratio of the coal(s) having a logarithmic value of Gieseler maximum fluidity, logMF, of not less than 3.0, and carbonizing coals that have been blended according to the determined blend ratio.
摘要:
A method for producing coke is provided. Said method comprising determining beforehand brands of coals or caking additives to be added to a coking coal blend, as well as the total blend ratio of a coal or coals with logMF of less than 3.0 relative to the coal blend, measuring the permeation distance with respect to a coal or coals having a logarithmic value of Gieseler maximum fluidity, logMF, of not less than 3.0, among the coals to be added to the coking coal blend, determining a relationship between the weighted-average permeation distance of the coals or caking additives with logMF of not less than 3.0 that are to be added to the coal blends, and the coke strength obtained with the coal blends prepared while changing the proportions of the individual brands of coals, the relationship being obtained by changing the proportions of the individual brands of coals or caking additives with the total blend ratio of the coal or coals with logMF of less than 3.0 being kept constant relative to the coal blend, and adjusting the weighted-average permeation distance by controlling the brand and the proportion of the coal(s) with logMF of not less than 3.0 so as to achieve coke strength that is not less than a desired value.