Эффективность десульфурации чугуна при производстве высококачественной стали в условиях ОАО “Уральская Сталь”

Abstract

The analysis of the sulfur removal in the production of high quality steel in the technological conditions of JSC "Ural Steel" was performed. An increase in the sulfur content of the pig iron at 0.007-0.010% of the tapping from the blast furnace until used in an electric arc furnace was founded. The need for preliminary hot metal desulphurization before pouring in the electric arc furnace was justified. The method of calculating the cost of hot metal desulphurization, and the performance of the electric arc furnaces and "ladle-furnace", depending on the quality of the initial charge on the sulfur content was developed. The results of optimization technology of smelting high quality steel with using hot metal desulphurization at JSC "Ural Steel" were presented. It is established that, with an average sulfur content of the pig iron from the blast furnace 0.019%, the minimum cost of production of steel with a sulfur content of 0.005% (with the share of liquid pig iron in the metal stock to 34%) are provided at the organization ladle hot metal desulphurization to a sulfur content of 0.005%.