提高达钢烧结中钒钛矿配比的试验研究

Experimental study on improving the ratio of vanadium titanium ore in sintering of Da Steel

为提高钒钛矿粉的配比,通过烧结杯试验、烧结矿冶金性能检测研究了钒钛矿配比对烧结矿质量和冶金性能的影响。研究表明:钒钛矿粉配比从40%提升到60%时,烧结矿抗磨指数略有上升,烧结矿转鼓强度略有下降,烧结矿的低温还原粉化指标降低,烧结矿还原性略有降低,软化开始温度、软化终了温度和滴落温度有所降低,软熔区间略有变窄,软熔带略有上移,烧结矿质量总体下降。将烧结矿碱度从2.15提高到2.25,烧结矿抗磨指数约降低1%,烧结矿转鼓强度提升0.66%,烧结矿低温还原粉化指标平均约提升了6%,烧结矿还原性也略有提升。因此,可通过提高碱度提高达钢烧结配料中钒钛矿粉配比,进而改善烧结矿的质量。

In order to improve the ratio of vanadium and titanium ore powder,this paper studied the influence of vanadium and titanium ore ratio on the quality and metallurgical properties of sinter through sinter cup test and metallurgical properties testing.Studies showed that vanadium titanium mineral powder ratio increased from 40%to 60%,the sinter anti-wear index rose slightly,the sinter drum strength slightly decreased,low temperature reduction degradation index of the sinter also decreased,sinter reducibility was slightly lower,the start of soften temperature,the end of softening temperature and dripping temperature decreased,the soft melting interval was narrowed slightly,soft melting zone was slightly upward,The overall quality of sinter decreased.When the basicity of sinter increased from 2.15 to 2.25,the anti-wear index of sinter was reduced by about 1%,the drum strength of sinter increased by 0.66%,the low temperature reduction degradation index of sinter increased by about 6%on average,and the reduction property of sinter was also slightly improved.Therefore,the ratio of vanadium and titanium ore powder in sintering ingredients of Da Steel could be improved by increasing basicity,so as the quality of sinter.