In this paper,it is analyzed the causes of abnormal temperature increase of side wall at tap hole for hearth of 7# blast furnace of Baotou Steel and emphasized the treatment measures. With the long-term high-intensity smelting conditions,tap hole of hearth is relatively active and its length is controlled poorly so that scour of slag iron to carbon brick of tap hole is aggravated. As a result,the erosion of carbon brick of tap hole is the cause for temperature increase of side wall at tap hole for hearth of 7# blast furnace. The temperature of side wall at tap hole is effectively controlled without re-ducing the smelting intensity and output of 7# blast furnace through taking such measures as increasing the quantity of circu-lating water at tap hole to improve cooling intensity,carefully maintaining tap hole,actively eliminating air gap of hearth side wall as well as appropriately opening central gas stream and restraining gas stream at edge for the charging system.
关键词
大型高炉/铁口区侧壁温度/综合治理
Key words
large blast furnace/temperature of side wall at tap hole/comprehensive treatment
万方数据