磨矿浓度对磨矿产品粒度组成特性的影响

磨矿浓度是影响磨矿产品粒度组成特性的关键因素.根据柿竹园矿石性质，在实验室和工业试验中分别考察不同浓度下一段磨和二段磨的产品粒度组成特性.结果表明，实验室条件下一段磨矿浓度在75%、二段磨矿浓度在65%时能获得均匀性好、合格产品粒度粗和有用磨矿耗能低的磨矿产品质量.工业试验条件下一段磨矿和二段磨矿产品中合格粒级产率分别增加2.23%和3.96%、平均粒度分别加粗1.13μm和3.8μm ，过粉碎分别减轻0.88%、1.35%，磨矿过程技术效率分别增加2.79%、4.86%，能耗利用率分别增加4.39%、6.12%.同时，分级溢流产品中合格粒级产率增加0.72%，平均粒度加粗1.4μm，过粉碎减轻6.76%，分级溢流产品质量得到全面优化.对选矿厂而言，稳定磨矿浓度非常有必要.

Effect of grinding concentration on product size distribution characteristics

Grinding concentration is an important factor that can influence particle size characteristics of grinding product. According to the ore property in Shizhuyuan, the particle size characteristics of the first and second grinding products in different grinding concentrations from 60%to 80%in laboratory experiments and industrial tests were studied. The results show that the best grinding products with good uniformities, fine dissociation and low useful energy can be obtained at first grinding concentration of 75%and the second of 65%in laboratory experiments. In industrial tests, recoveries of eligible products in the first increased 2.23 % and second was 3.96%, average grading were respectively heightened 1.13 μm and 3.8 μm, reduced degree of over grinding reduced 0.88%and 1.35%, grinding technical efficiencies increased 2.79%and 4.86%, and incremental use ratios of energy consumption were 4.39%and 6.12%. At the same time, the quality of grader overflow products were roundly optimized, eligible fraction increased by 0.72 %, average grading heightened 1.4 μm, and over crushed reduced by 6.76%. In sum:the steady grinding concentration is necessary for the concentrator.