轴承滚动体研磨钢泥夹杂物的去除

Inclusion removal from bearing roller scrap

轴承滚动体在研磨过程中会产生Al_2O_3、SiC等磨料夹杂物而影响研磨钢泥的再利用,因此必须除去。对比了研磨钢泥不同除杂方案的除杂效果,并比较了磁选前钢泥处理方式及磁选强度对去除夹杂物效果的影响。试验结果表明,磁选除杂效果最好,磁选前对钢泥进行湿磨处理,磁选过程中选择较小的磁选强度有利于夹杂物的去除。分析了Al_2O_3、SiC磨料夹杂物杂质不能完全分离的原因,主要是大颗粒钢泥表面存在很多孔洞,使得细颗粒夹杂物镶嵌在内部,难与以钢泥完全分离。

During grinding the bearing roller,Al2O3 and SiC abrasive inclusions were produced,and these inclusions must be removed because of its bad influence on recycling of steel scrap.The effects of different schemes on removing the impurity from steel scrap were compared,the choice of handling methods before magnetic separation and the magnetic intensity during magnetic separation process were studied.The results show that the method of magnetic separation is the best.Wet milling processing is done for the steel scrap before magnetic separation and smaller magnetic intensity is chosen during magnetic separation process which is beneficial to inclusion removal.The main reason why the Al2O3 and SiC abrasive inclusions can not be completely separated from steel scrap is that there are many holes on the surface of big grain steel scrap,so the fine grain inclusions are embedded in these holes and hard to be separated from steel scrap.