Improving the Electrical Resistivity of Blast-Fumace Coke

The influence of the addition of petroleum coke on the quality of coal charges and blast furnace coke obtained from them has been determined. Four variants of coal charges with different content of coal concentrates and petroleum coke have been studied. The obtained data indicate an increase in the degree of orderliness of the coke structure and the appearance of a larger number of nanostructures when added to coal charges as an additive of petroleum coke in the amount of 5%. Also, a similar modification of the charge leads to an increase in gross coke output by 1.3-1.4%; an increase in the total sulfur content in coke by 0.12-0.14%; reduction of coke ash content by 0.3-0.4%; deterioration of mechanical <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(P_{25}$</tex> -by 0.2-0.5%; I<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</inf>- by 0.1-0.2%) and strength after reaction (CSR - by 0.6-0.8%), reactivity (CRI - by 0.2-0.3%) of coke, as well as structural strength (SS by 0.6-0.8%), abrasive hardness (AH by 0.6-1.1 mg) and specific electrical resistance <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\rho$</tex> by 0.002-0.007 Ohm×cm). Due to the positive influence of the coal of the “Svyato-Varvarynska” coal processing plant on the quality indicators of the blast furnace coke, an improvement in the quality of the coke obtained with a greater share of it in the charge is observed. On the other hand, when using a coal charge characterized by the lowest content of the mentioned coal, the quality of the obtained coke decreases sharply.