Improvement and Practice of Grinding System in Section Ⅰ of a 6000 t/d Copper Polymetal Concentrator
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摘要:
超低品铜多金属矿是国内铜矿石资源的重要组成部分，该类型矿石自身赋存品位较低、回收难度较大，同时选别工艺指标要求较高、生产成本较高。针对某超低品位铜多金属矿6000 t/d选矿厂Ⅰ段磨矿分级系统运转率不足的问题，通过系统性的工艺技术改造、设备技术改造、生产精准化管理等，Ⅰ段磨矿分级系统运转率由90.29%提高到97.27%、提高近7个百分点；选矿厂年处理量提高15万t以上，有效回收铜金属300 t/a、铁金属8500 t/a、钼金属15 t/a， 产生经济效益超过2500万元/a；达到了提高磨矿技术指标同时增加生产效益的目的。
Abstract:Ultra-low-grade copper polymetallic ore is an important component of domestic copper ore resources. This type of ore has a low storage grade and is difficult to recycle. Meanwhile, it requires higher processing index requirements and higher production costs. Aiming at the problem of insufficient operation rate of I-stage grinding classification system in 6000 t/d concentrator of an ultra-low grade copper polymetallic ore, the operation rate of I-stage grinding classification system was raised from 90.29% to 97.27% and increased by nearly 7 percentage points through systematic technological transformation, equipment technical transformation production precision management; The annual treatment capacity of the concentrator is increased by more than 150,000 tons, and the effective recovery of copper metal is 300 t/a, iron metal is 8500 t/a, molybdenum metal is 15 t/a, and the economic benefit is more than 25 million yuan/a. It achieves the aim of improving the technical index of grinding and increasing the efficiency of production.
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表 1 选矿厂历年（2012~2018年度）运转情况统计
Table 1. Statistical table of the operation of the concentrator over the years (2012-2018)
磨矿机
运转情况单位 2012 2013 2014 2015 2016 2017 2018 算术
平均各类停车
时间比例/%备注 运转率 % 90.29 91.77 92.27 93.80 94.21 95.89 97.27 93.64 - 停车原因及时间 - - - - - - - - - - 无矿 h 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 客观
原因无水 h 4.15 0.00 4.35 6.35 3.40 34.45 0.00 7.53 0.55 无电 h 18.40 578.50 322.15 5.10 6.55 109.50 137.50 168.24 12.32 尾矿输送 h 0.00 0.00 28.05 116.02 0.00 0.00 0.00 20.58 1.51 主观
可改进检修 h 1955.10 1285.00 1053.10 931.30 949.55 912.25 807.45 1127.68 82.55 其他 h 45.50 43.10 16.35 34.55 54.30 37.05 63.30 42.02 3.08 客观
原因停产总时间 h 2023.15 1906.60 1424.00 1093.32 1013.80 1093.25 1008.25 1366.05 100.00 
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