济钢高炉强动力冶炼技术的应用

Application of Strong Power Smelting Technology in Jinan Steel's BF

为应对经济料冶炼造成的入炉综合品位低、渣比高、渣中Al2O3含量高等导致的高炉透气透液性差、炉渣黏度大等操作难题,济钢高炉(1 750 m3、3 200 m3)采取强动力冶炼技术,即通过加长风口长度、缩小进风面积等方法提高鼓风动能从而提升炉缸活性,并通过布料制度、热制度及造渣制度的改善,提高终渣性能,从而实现了高炉长期稳定顺行,产量提高,生铁含Si下降,燃料比降低20 kg/t以上。

Because of smelting using economy raw material, the ore comprehensive grade was lower, the slag ratio and the Al2O3 content in slag were higher, then, the permeability and liquid-penetration of BF were poor and the slag viscosity was largeer. Therefore, Jinan Steel adopted strong power smelting technology in 1 750 m^3 and 3 200 m^3 BFs： increasing blast momentum by extending the tuyere length and narrowing the air area to improve the hearth active, and improving the final slag performance by ameliorating distribution, thermal and slagging system. The BF＇ s regular and stable performance for long-term can be realized. At the same time, the outputs were improved, the Si content in pig iron is decreased and the fuel radio reduced by 20 kg/t.