As before, the main trends in world blast-furnace smelting in this century have been a decrease in coke use, an increase in furnace productivity, and lengthening of the furnace campaign. Over the last few decades, metallurgical companies have paid an increasing amount of attention to extending the life of blast furnaces through the use of various technical, technological, and organizational measures. This article generalizes those companies' experiences in this area and analyzes the results of studies conducted by the world's largest producers of blast-furnace pig iron.
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