焦家金矿磨矿介质配比优化试验研究与应用  

Experimental Study and Application of Grinding Medium Ratio Optimization in Jiaojia Gold Mine

作　　者：衣成玉 裴英杰 马帅 YI Chengyu;PEI Yingjie;MA Shuai(Jiaojia Gold Mine,Shandong Gold Mining(Laizhou)Co.,Ltd.,Laizhou 261441,Shandong,China;School of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;State Key Laboratory for Clean Utilization of Complex Nonferrous Metal Resources,Kunming 650093,Yunnan,China)

机构地区：[1]山东黄金矿业(莱州)有限公司焦家金矿,山东莱州261441 [2]昆明理工大学国土资源工程学院,云南昆明650093 [3]省部共建复杂有色金属资源清洁利用国家重点实验室,云南昆明650093

出　　处：《黄金科学技术》2022年第1期122-130,共9页Gold Science and Technology

基　　金：国家自然科学基金地区科学基金项目“磨矿条件对黑钨矿微细粒粒度特性和界面性质影响及调控机制研究”(编号:51964044)资助。

摘　　要：针对焦家金矿选矿厂球磨机单位球耗高、磨机效率偏低和磨矿产品粒度组成不均匀等问题,基于矿石力学性质和磨矿循环产品粒度分布,采用段氏球径半理论公式计算得到推荐方案介质配比,并建立对照方案进行实验室磨矿对比试验,最终确定初装球方案为:Φ90∶Φ70∶Φ50∶Φ40∶Φ30=15∶25∶20∶15∶25。2016年10月26日开始对焦家金矿3#球磨机(MQG2736)进行工业试验,工业试验后磨机排矿磨矿细度-0.074 mm产率较试验前提高了4.06%,粗粒级+0.30 mm产率降低了5.64%,磨机处理量提高了6.42%,表明推荐球比方案更适合现场球磨作业,有利于提高磨矿产品质量。Gold has been widely used because of its easy forging and corrosion resistance,and it promotes the development of daily life,industry and global economy.Gold ore separation is mainly composed of raw ore crushing,grinding classification,flotation and concentration.The quality of grinding products is directly determined by the addition system of grinding medium,which affects the beneficiation index and the economic benefit of the concentrator.Grinding operation is an important part of gold recovery.The optimization of grinding medium system can effectively improve the quality of grinding products,and make more qualified fractions enter the flotation process,which is beneficial to the separation and enrichment of gold mines.There are some problems in the first-stage grinding workshop of Jiaojia gold mine,such as high unit ball consumption of ball mill,low grinding efficiency and unreasonable particle size composition of grinding products,which greatly affect the normal production situation and separation index of concentrator and lead to low economic benefits of mine.In order to solve the above problems,this paper optimized the grinding medium addition system of ball mill to improve the quality of grinding products.The mechanical properties of ore were determined and the particle size composition of ore was screened.Based on the mechanical properties of ore and the particle size distribution of grinding cycle products,the medium ratio of the recommended scheme was calculated by Duan􀆳s semi-theoretical formula of spherical diameter asΦ90∶Φ70∶Φ50∶Φ40∶Φ30=15∶25∶20∶15∶25.In addition,four groups of schemes,i.e.,field scheme,recommended scheme,oversize scheme and undersize scheme,were tested in laboratory grinding contrast test and grinding contrast test under different sand return ratio in a discontinuousΦ450×450 mm ball mill in laboratory.The yield of roughing grade,easy-to-select grade,optional grade and superfine grade were taken as evaluation indexes.Finally,the initial ball loading scheme w

关 键 词：介质配比 磨机处理量 磨矿产品质量 磨矿优化 选矿厂 焦家金矿 

分 类 号：TD921[矿业工程—选矿]