水钢高炉最佳炉料结构的试验

Study on the Best Burden Structure for the Blast Furnace

采用正交试验方法研究了现有原燃料及设备条件下水钢高炉的最佳炉料结构;在此基础上进一步优化炉料结构,并对它们的冶金性能进行了试验。结果表明:目前水钢高炉最佳炉料结构为86%的烧结矿(二元碱度为1.8)配加14%的印度块矿与越南块矿的混合矿(混合比例为1:1);此种炉料结构的软熔性能好,还原性能达到优良水平,炉渣碱度合适,但低温还原粉化性能不佳;若采用二元碱度为1.7的烧结矿,使炉渣的碱度低于1.2,则熟料率达到90%的炉料结构是完全可行的。

By means of the method of Orthogonal test, the best burden structures were studied under the present condition of raw material, fuel and equipment for the blast furnace in the Shuicheng I＆S Co, the further burden structure was optimized, and the metallurgical properties were tested. The results show that the present best burden structure for the BF in the Shuicheng I＆S Co consist of 86% sinter whose basicity is 1.8 and 14% natural ore which is the mixture of 50% India ore and 50% Vietnam ore. This burden structure has good performance in indexes of softening, melting and dropping, the choice RI（ reduction index） and the proper basicity of slag, but its RDI（ low temperature reduction degradation index） is not good. If the sinter with basicity being below 1.7 and the basicity of its slat being below 1.2, the burden structure that has 90% sinter is completely practicable.