Study of the influence of technological parameters of the cooking process on the quality of coal tar produced in com ovens “ArcelorMittal Temirtau” JSC

Abstract

In the article there are presented results of a research that was carried out to determine a reason for the increase of more than 1,22 g/cm3 coal-tar oil density at the coke production of “ArcelorMittal Temirtau” joint-stock company. There have been studied samples of coal concentrates from nine layers of eight mines in Karaganda coal basin and GZh coal concentrate which are supplied to the coke chemical production of “ArcelorMittal Temirtau” joint-stock company from “Kunetskaya” Enrichment plant (Russia). During the work there has been determined dependence of the gas composition on the temperature affecting gas that was released during coal carbonizing process. It is experimentally established that with an increase in the temperature of the released coke gas above 750 ° C to 1000 ° C, light fractions evaporate from the resin and are removed into the gas discharge path, which is accompanied by a weighting, an increase in the density captured for processing coal tar into pitch. The results of the resin studies that is isolated in the same temperature ranges show the indicators of the resin yield and its density during the tests of concentrates also follow a certain pattern – with an increase in the coal carbonizing temperature and with overheating of the released gas, the resin density increases and its yield decreases. The researches in the plant has found that the technological reason for the weighting of the coke gas resin is a low level of coal charge stockline, which makes possible to linger the coke gas in the underroof space and to overheat with increasing the access of light fractions of the resin with the gas.