装球制度对花岗斑岩磨矿产品粒度特性的影响  

Effect of Balling System on Granularity Characteristics of Grinding Products of Granite Porphyry

作　　者：袁程方 邵翌博 熊源 王鑫 朱峰 李勇[1] YUAN Chengfang;SHAO Yibo;XIONG Yuan;WANG Xin;ZHU Feng;LI Yong(Faculty of Resource and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000,China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州市341000

出　　处：《矿业研究与开发》2022年第2期54-59,共6页Mining Research and Development

摘　　要：为了探究装球制度对钼矿石磨矿粒度特性的影响,以花岗斑岩型辉钼矿为研究对象,对-2mm样品进行精确化装球制度计算,在该制度下进行磨矿时间、质量浓度、介质充填率条件试验和装球制度对比试验;对-6.7mm样品进行装球制度扩大对比试验以及浮选验证试验。研究表明,在入磨粒级为-2 mm时,精确化装球制度与偏大球装球制度相比,磨矿细度提高9.06个百分点,与偏小球装球制度相比,过粉碎粒级降低11.57个百分点;在入磨粒级为-6.7mm时,精确化装球制度磨矿产品-75μm粒级产率比偏大球装球制度高23.61个百分点,比偏小球装球制度高20.47个百分点。精确化装球制度磨矿产品浮选试验获得钼品位15.40%、回收率95.55%的粗精矿,浮选精矿回收率明显高于其他两者,硫钼分离效果较好,表明精确化装球制度具有理想的磨矿产品粒度组成,能有效地改善浮选指标。In order to explore the influence of ball-loading system on the grinding granularity characteristics of molybdenum ore, taking the granite–porphyry type molybdenite as the research object, the precise ball-loading system was calculated for-2 mm samples. Under this system, experiments of grinding time, mass concentration and medium filling rate were carried out, as well as comparative experiments of ball-loading system. For-6.7 mm samples, the expanded comparison tests and flotation verification tests of ball-loading system were carried out. The results show that when the grinding granularity is-2 mm, the grinding fineness can be improved by 9.06% under the precise ball-loading system compared with the ball-loading system with large proportion, the overcrushing grain size can be reduced by 11.57% compared with the ball-loading system with small proportion. When the grinding granularity is-6.7 mm, the yield of-75 μm grinding product under the precise ball-loading system is 23.61% higher than that under the ball-loading system with large proportion, and 20.47% higher than that under the ball-loading system with small proportion. In the flotation experiment of grinding products by precise ball-loading system, coarse concentrate with molybdenum grade of 15.40% and recovery of 95.55% can be obtained. The recovery rate of flotation concentrate is obviously higher than the other two, and the separation effect of sulfur and molybdenum is better, which indicates that the precise ball-loading system has the ideal particle size composition of grinding products and can improve the flotation indexes.

关 键 词：精确化磨矿 装球制度 花岗斑岩 辉钼矿 粒度特性 

分 类 号：TD923[矿业工程—选矿]