ПРОМЫШЛЕННЫЙ ОПЫТ ПОЛУЧЕНИЯ МОДИФИЦИРОВАННОЙ ДОБАВКИ КОКСУЮЩЕЙ ГИДРОКСИДОМ КАЛЬЦИЯ

Abstract

In article the problem of using high volatile coke in coking industry is considered. Core of the problem consists in the following: petroleum coke with volatiles in the range of 15 to 25% is a good substitute for scarce coal grades using in coking blend for metallurgical coke production. But in the final product of blast furnace smelting - crude iron - sulfur content is increased that is unacceptable. In order to avoid sulfurization of crude iron introduction of calcium and magnesium compounds to delayed coker feedstock is proposed. These compounds are used in blast furnace smelting for binding sulfur and its transfer into the slag thereby providing an acceptable level of sulfur content in the crude iron. Laboratory experiments and experimental-industrial running in the «Novoil» delayed coker with the introduction of calcium hydroxide to delayed coker feedstock were conducted. Subsequent tests of obtained coking additive in «Ural Institute of Metals» show that introduction of calcium hydroxide to delayed coker feedstock allows much more effective to bind sulfur coming into the blast furnace. Thus ultra low sulfur crude iron is obtained.