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为了给烧结生产优化配矿技术提供基础依据,更好地指导烧结生产,对青钢烧结常用的6种铁矿粉的同化性能、液相生成特性以及烧损和结晶水分解特性等高温基础性能和微观结构进行了研究,且运用评价模型对各铁矿粉进行了评分。结果表明,各铁矿粉的同化温度均未超过1 250℃,可以满足低温烧结的条件,同化性能最好的为铁矿粉E;1 240℃时6种铁矿粉的流动性指数较适宜低温烧结,1 280℃时流动性指数和液相生成量均较高;6种铁矿粉中铁矿粉E的烧损值和结晶水值均处于较高水平,其中铁矿粉F的结晶水含量是6种矿粉中最高的;6种铁矿粉的微观形貌差异较大,铁矿粉C和D表面较光滑,吸水能力差,从制粒的角度上来看,不利于改善制粒效果,而铁矿粉A和B的表面较粗糙,适宜制粒;基于评分的高低将铁矿粉划分为4个等级。
In order to provide the basis for optimization of ore blending technology in sintering production and to better guide the sintering production, the basic properties of high temperature, such as assimilation, liquid-phase formation, burning-out and crystallization of water, And microstructure were studied, and the evaluation model was used to score each iron ore powder. The results show that the assimilation temperature of each iron ore powder does not exceed 1 250 ℃, which can meet the conditions of low temperature sintering, the best assimilation properties of iron ore powder E; 1 240 ℃ when 6 kinds of iron ore powder more appropriate flow index At low temperature sintering, the fluidity index and liquid phase yield were all higher at 1 280 ℃. The burning loss and crystallization water of iron ore powder E in 6 kinds of iron ore powder were all at a high level, and the crystallization of iron ore powder F Water content is the highest among the 6 kinds of mineral powders. The micro-morphologies of the 6 kinds of iron ore powders are quite different. The surface of iron ore powder C and D is smooth and has poor water absorption capacity. From the granulation point of view, Grain effect, while the surface of iron ore powder A and B rough, suitable for granulation; iron ore powder is divided into four grades based on the level of the score.