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为解决高炉喷吹煤可磨性的问题,研究了3种具有代表性的煤种以不同质量配比搭配后的混合样可磨性指数的变化规律,并利用卡方检测研究了不同配比的混煤可磨性指数与加权可磨性指数的关系。试验结果表明:经过卡方检测证明2种单煤混合样的可磨性指数具有线性加和性;然后在-0.074mm的粒度下,根据粒度指数的概念,混煤的粒度分布并没有加合效果,这与两种单煤的可磨性指数差异大小有关,试验证明:可磨性指数差异较大的两种煤混煤研磨,在较细的粒级范围内粉碎方式倾向于表面粉碎,难磨煤对易磨煤的粉碎起到促进作用。
In order to solve the problem of pulverizable pulverized coal blasting blast furnace, we studied the variation law of the grindability index of three kinds of representative coal samples with different mass proportions, and used chi-square test to study the different proportion Relationship between grindability index and weighted grindability index of blended. The test results show that the grindability index of two kinds of single-coal mixed samples shows linear additivity after chi-square test. At the particle size of -0.074mm, the particle size distribution of the mixed coal is not additive according to the concept of particle size index Effect, which is related to the difference of grindability index of two kinds of single coal. The experiment proves that two types of coal mixed coal grinding with big differences in grindability index will grind on the surface within the finer grain size range, Hard grinding of coal grinding on the easy to play a catalytic role.