利用半自磨机顽石为介质在小型圆锥球磨机中的损耗与磨矿研究

发布时间：2018-05-07 14:55

本文选题：半自磨机 + 顽石　；参考：《有色金属工程》2017年06期

【摘要】：在实验室小型圆锥球磨机内,利用大量堆积的半自磨机顽石作为磨矿介质并对其损耗和磨矿进行了研究。样品和顽石均来自江西省江西铜业集团公司银山矿业,实验内容包括磨矿时间、充填率、磨矿浓度和顽石大小等条件试验。试验结果表明,半自磨机顽石介质损耗量比传统钢球损耗量(约0.05%)偏高,一般介于1%~2%。顽石的磨损率随着时间基本呈现线性增加的关系,随着充填率先增加后减小,在40%充填率时达到最大磨损,随着浓度也是先增加后减小,随着顽石尺寸增大而急剧增加。磨矿细度随时间的趋势呈现刚开始增加很快,过了20 min后趋势基本变平缓,在30%~70%充填率时呈现逐步下降的趋势,随浓度增加呈现先上升后下降趋势,在60%浓度时达到最大细度,同时过粉碎粒级(-10μm)含量也达到最大,随顽石尺寸增大呈现先上升后下降的趋势,-40+30 mm大小的顽石磨矿效果最好。同时,在不同条件下的最终产品粒度曲线基本相似,-125+45μm粒级的磨矿速率最大。
[Abstract]:In the laboratory small conical ball mill, a large number of semi-self-mill die-stones are used as grinding medium, and its loss and grinding are studied. The samples and die-stones are from Yinshan mining industry of Jiangxi Jiangxi Copper Industry Group Company. The experiment includes grinding time, filling rate, grinding concentration and the size of refractory stone. The results show that the loss of boulder in semi-self-grinding machine is higher than that of traditional steel ball (about 0.05) and is generally between 1 and 2. The wear rate of refractory stone increases linearly with time, increases first and then decreases with filling, reaches the maximum wear at 40% filling rate, increases first and then decreases with concentration, and increases sharply with the increase of stone size. The grinding fineness increased very quickly with time, after 20 min, the trend became more and more smooth, and then decreased gradually at the filling rate of 30% and 70%. With the increase of concentration, the grinding fineness increased first and then decreased, and reached the maximum fineness at 60% concentration. At the same time, the content of over-comminuted particles was also the highest, and the grinding effect of the stone with the size of -4030mm was the best with the increase of the size of the boulder and the tendency of the increase of the size of the boulder first and then the decrease. At the same time, under different conditions, the grinding rate of the final product is similar to that of -125 45 渭 m.
【作者单位】：玉溪师范学院资源环境学院;江西理工大学资源与环境工程学院;江西省矿业工程重点实验室;江西铜业集团银山矿业;
【基金】：江西省科技厅重点研发计划项目(20171BBG70045) 江西省教育厅课题(GJJ150651) 江西理工大学校级重点课题(NSFJ2015-K02)
【分类号】：TD453

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