未燃煤粉对焦炭和炉渣性能影响的实验研究

An Experimental Study of Effect of Unburned Pulverized Coal on Properties of Coke and Slag

采用铁矿石中低温还原及焦炭反应性装置和高温熔体物性测试仪,分别进行焦炭反应性和炉渣黏度实验,研究未燃煤粉对焦炭和炉渣性能的影响。结果表明:未燃煤粉可起到保护焦炭的作用,未燃煤粉质量分数由0增加到9%,焦炭反应后强度(CRS)由72.0%增加到76.4%,焦炭反应性(CRI)由23.5%降低到16.1%;未燃煤粉作为熔体中的固体质点可使炉渣的黏度增加,质量分数由0增加到8%,炉渣黏度由0.266 Pa·s增加到0.591 Pa·s,质量分数增加到10%,炉渣黏度急剧上升到0.824 Pa·s。

Experiments about the coke reactivity and slag viscosity were performed with the medium-low temperature reduction and coke reactivity device of iron ore and the high-temperature melt property tester,and the effects of unburned pulverized coal on the properties of coke and slag were studied.The results show that the unburned pulverized coal can play a role in protecting coke,when the mass fraction of unburned pulverized coal increases from 0 to 9%,the coke after reacting strength(CRS)increases from 72.0%to 76.4%,and the coke reactivity(CRI)decreases from 23.5%to 16.1%;the unburned pulverized coal as solid particles in the melt makes the slag increase,when the mass fraction increases from 0 to 8%,and the slag viscosity increases from 0.266 Pa·s to 0.591 Pa·s,while the mass fraction increases to 10%,the slag viscosity increases sharply to 0.824 Pa·s.