This study aimed to evaluate the effect of both inorganic (boron carbide nanopowders and silicon carbide (carborundum) and organic lean (petroleum coke) additives on the quality of coke produced in a laboratory furnace, as well as on its electrical properties. Analyzing the results of the quality assessment of the obtained coke, it can be argued that the addition of a fixed amount $(0.25-0.5 \ wt.\%)$ of non-caking nanoadditives allows to regulate the process in the plastic state in order to increase the coke strength. This modification affects the coke quality and has a significant dependence on the grade composition of the coal charge. The use of nanoadditives is especially important for coal charges with poor coking properties. Adding $5\%$ of petroleum coke to the coal charge leads to an increase in the gross coke yield by $1.2-1.3\%$; a decrease in coke ash content by $0.2-0.3\%$; an increase in the total sulfur content in coke by $0.15-0.23\%$; deterioration in both mechanical $(P25 − F 0. 1-0.6\%; I10 − by \ 0.1-0.2\%)$ and coke strength after the reaction $(CSR - by \ 0.6-1.0\%)$, coke reactivity $(CRI - by \ 0.2-0.3\%)$, as well as structural strength $(SS \ by \ 0.3-0.4\%)$, abrasive hardness $(AH \ by \ 0.7-1.0 \ mg)$ and specific electrical resistance $(ρ \ by \ 0.002-0.007 \ Om×cm)$. The obtained data may indicate an increase in the order degree of the coke structure and the appearance of a larger number of nanostructures. In addition, it should be noted that a sharper deterioration in blast furnace coke quality is observed when using a coal charge characterized by a lower coal content of the Concentrating Factory Svyato-Varvarynska LLC.
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