Mirador铜矿一段磨矿球磨机介质配比优化研究  

Study on Ratio Optimization of Steel Ball Medium in First Stage Grinding in Mirador Copper Mine

作　　者：陶如兵 TAO Rubing(China Railway Construction Tongguan Investment Co.,Ltd.)

机构地区：[1]中铁建铜冠投资有限公司,安徽省铜陵市244000

出　　处：《现代矿业》2024年第8期219-221,224,共4页Modern Mining

摘　　要：针对Mirador铜矿Ф7.9 m×13.6 m球磨机装补球制度不合理、磨矿产品粒度组成不合理等问题,对初装球介质配比进行了计算。确定初装球方案为Ф80 mm、Ф60 mm、Ф50 mm、Ф40 mm、Ф30 mm钢球质量为15∶20∶25∶20∶20,对推荐初装球与原初装球进行磨矿对比试验,推荐初装球径配比适宜且级配合理,磨矿产品-0.074 mm级别产率比现场原初装球配比提高了4.11个百分点,0.074~0.010 mm中间粒级产率提高了2.05个百分点,且待磨+0.20 mm产率降低了6.24个百分点,优化效果明显。补加球对比试验结果表明,与补加单一钢球相比,补加钢球采用Ф80 mm、Ф60 mm、Ф50 mm、Ф40 mm质量比为25∶35∶20∶20时,获得的磨矿产品-0.074 mm级别产率提高了6.05个百分点,中间易选粒级0.074~0.010 mm产率提高了3.14个百分点,+0.20 mm粒级降低了8.87个百分点。试验结果对改善一段磨矿产品粒度组成,减少混合浮选尾矿中粗粒级含铜,提高铜回收率具有重要意义。Aiming at the problems of unreasonable ball filling system and unreasonable particle size composition of grinding products inϕ7.9 m×13.6 m ball mill of Mirador Copper Mine,the medium ratio of initial ball was calculated.The initial ball scheme was determined to beϕ80 mm,ϕ60 mm,ϕ50 mm,ϕ40 mm,ϕ30 mm steel ball with a mass ratio of 15∶20∶25∶20∶20.The grinding comparison test of the recommended initial ball and the original initial ball was carried out.It is recommended that the diameter ratio of the initial ball is suitable and the grade is reasonable.The yield of-0.074 mm grade of the grinding product is 4.11 per⁃centage points higher than that of the original ball on site,the yield of 0.074~0.010 mm intermediate grade is increased by 2.05 percentage points,and the yield of+0.20 mm to be ground is reduced by 6.24 percent⁃age points.The optimization effect is obvious.The results of the contrast test of adding balls show that,com⁃pared with adding a single type steel ball,when the mass ratio ofϕ80 mm,ϕ60 mm,ϕ50 mm andϕ40 mm is 25∶35∶20∶20,the yield of-0.074 mm grade of grinding products is increased by 6.05 percentage points,the yield of 0.074~0.010 mm grade of intermediate easy-to-select grain is increased by 3.14 percentage points,and the yield of+0.20 mm grade is decreased by 8.87 percentage points.The test results are of great significance to improve the particle size composition of the primary grinding products,reduce the copper content in the coarse fraction of the mixed flotation tailings,and improve the copper recovery rate.

关 键 词：球磨机 钢球配比 装球制度 磨矿产品 

分 类 号：TD453[矿业工程—矿山机电]