煤基碳素的石英砂超细助磨研究

Study on Ultrafine Grinding of Quartz with Coal Based Carbon

在干法条件下,采用石英砂作为助磨剂,对煤基碳素进行了超细粉碎试验,研究了石英砂的用量以及添加方式对煤基碳素超细粉碎的影响,并从粉碎动力学的角度分析了石英砂助磨剂的不同添加方式对于煤基碳素的超细助磨规律。试验结果表明:随着石英砂用量的增加,煤基碳素粉体的中值粒径D50先减小而后趋于不变,当用量为1. 4 g时,粉体的D50降低到3. 21μm;在助磨剂的三种添加方式中,粉碎前的助磨剂一次性添加时,粉碎速率更高,适合于粉碎时间较长的情况;粉碎过程中的助磨剂增量添加时,粉碎速率变化更快,适合于粉碎时间较短的情况。

Under dry conditions,quartz was used as a grinding aid to perform ultrafine pulverization tests on coal-based carbon.The effect of the amount of quartz and the mode of addition on the ultrafine pulverization of coal-based carbon was studied.From the perspective of crushing dynamics,the regulation of the different addition methods of quartz grinding aids for ultrafine grinding of coal-based carbon was analyzed.The results showed that with the increase of the amount of quartz,the median diameter D 50 of the coal based carbon powder first decreased and then tended to be unchanged.When the amount was 1.4 g,the D 50 of the powder was reduced to 3.21μm.Among the three methods of adding grinding agent,it was found that the grinding rate was higher when the grinding aid was added only before grinding,which was suitable for long time grinding situations.However,when the grinding aid was added incrementally in the grinding process,the grinding rate changed faster and it was suitable for short time grinding situations.