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1.概况邯邢矿山局钢铁厂有100m~3、120m~3高炉各一座。原料主要以自熔性土烧结矿(R=1.2),自熔性球团矿(R_2=1.1)各50%配合使用。自1996年10月份24m~2烧结机投产后开始生产高碱度烧结矿(R_2=1.7)与酸性球团矿(R_2=0.6)以50%的比例入炉。烧结配料时采用白云石粉代替石灰石粉生产MgO>3.5%的高碱度烧结矿,白云石的主要成分,C_aO 39.17%,MgO17.69%。经过一段时间的生产实践,发现高MgO烧结矿不仅能改善烧结矿质量使其强度提高、含粉率降低。而且能明显改善炉渣的冶金性能,使炉况顺行稳定,产量增加,焦比降低。 2.高炉冶炼效果分析为便于比较分析,取1996年6月29日～7月29日为基准期,1996年11月29日～12月29日为试验期,主要技术指标见表1。
1. Overview Hanxing Iron and Steel Mines Bureau has 100m ~ 3,120m ~ 3 blast furnaces. Raw materials are mainly used in combination with 50% of self-fluxing earth sinter (R = 1.2) and self-fluxing pellets (R_2 = 1.1). Since the start of 24m ~ 2 sintering machine in October, 1996, the production of high alkalinity sinter (R_2 = 1.7) and acid pellets (R_2 = 0.6) have been put into the furnace in the ratio of 50%. Sintering ingredients using dolomite instead of limestone powder production MgO> 3.5% of high alkalinity sinter, dolomite main components, C_aO 39.17%, MgO 17.69%. After a period of production practice, found that high-MgO sinter can not only improve the quality of sinter to improve its strength, reducing the rate of powder. But also significantly improve the metallurgical properties of the slag, so that the furnace conditions go smoothly and steadily, the output increases and the coke ratio decreases. 2. Blast furnace smelting effect analysis To facilitate the comparative analysis, take June 29, 1996 to July 29 as the base period, November 29, 1996 to December 29, 1996 as the test period, the main technical indicators in Table 1.