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A taphole clay involves fire-clay powder, liquid glass, grinded fire-clay. It additionally contains dry fly ash as a filling agent, which ash is got from incineration of low reactionary coal with the particles size more than 40 μm, and mixture of coarsely dispersed powders of SiC, SiN, ТіО, СrО, in the ratio of 3:2:1:2 as alloying addition agents.