磁铁矿二段磨陶瓷球磨矿特性研究

Study on Characteristics of Ceramic Ball Milling of Magnetite Two-stage Grinding

为了改善马钢罗河选矿厂磨矿产品的粒度组成,针对其磨矿产品过磨严重等情况,对选厂二段入磨产品进行钢球和纳米陶瓷球的磨矿特性对比试验和磁选验证试验。试验结果表明:在开路磨矿条件相同的情况下,陶瓷球磨矿产品较钢球磨矿产品合格粒级提高了3.74个百分点,增幅为4.21%;过磨粒级减少了5.64个百分点,降幅为81.27%;陶瓷球磨矿产品合格粒级产率比钢球高7.32个百分点,使精矿品位提升0.13个百分点,回收率提升4.12个百分点;陶瓷球作为新兴的球磨介质,能有效改善磨矿产品的粒度分布特性,应用前景广阔。

In order to improve the particle size composition of grinding products in Luohe Concentra⁃tor of Masteel,the grinding characteristics comparison test and magnetic separation verification test of steel balls and nano-ceramic balls were carried out for the second stage grinding products of the concentrator in view of the serious overgrinding of grinding products.The test results show that under the same open circuit grinding conditions,the qualified particle size of ceramic ball mill products is 3.74 percentage points high⁃er than that of steel ball mill products,with an increase range of 4.21%.The over-abrasive level decreased by 5.64 percentage points,or decrease range of 81.27%.The qualified fraction yield of ceramic ball milled products is 7.32 percentage points higher than that of steel balls,which increases the concentrate grade by 0.13 percentage points and the recovery rate increased by 4.12 percentage points.As a new ball milling me⁃dium,ceramic ball can effectively improve the particle size distribution characteristics of grinding products and has broad application prospects.