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.
摘要:
Provided is a method for preparing a coal mixture used for the purpose of producing coke with desired strength by taking into account the compatibility between coals for cokemaking. In the case of preparing a coal mixture, used as at least one portion of a coal blend for cokemaking, containing two or more types of coals with different surface tensions, the blending ratio of each of the coals is adjusted using the surface tension of a semicoke mixture obtained from the coal mixture as an indicator.
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.