光电智能抛废技术在低品位铅锌矿的试验研究

Experimental research on photoelectric intelligent waste disposal technology in low-grade lead-zinc mine

摘要:

为降低矿山尾砂产率，提高选矿整体经济效益，盘龙铅锌矿引进光电智能抛废分选机，对低品位铅锌矿石进行了预选抛废小型、扩大和工业试验研究．小型试验对+30~-75 mm 粒级进行了抛废率试验，确定合理的抛废率为45%，此时铅、锌回收率分别为98.10%和94.77%；对不同粒级进行扩大试验，确定理想的分选粒级为10~75 mm，作业抛废率为45.95%时铅、锌回收率分别为97.68%和94.80%；对+15~-60 mm粒级进行了工业试验，取得20个班综合指标分别为作业抛废率41.20%、尾矿含铅锌为0.04%和0.21%、铅锌损失率为1.82%和2.56%，精矿含铅锌1.37%和5.82%，铅锌回收率分别为98.08%和97.44%．试验表明，光电智能抛废技术对盘龙铅锌矿低品位铅锌矿石分选抛废效果较好，可降低入磨矿石量，提高入选矿石品位，降低磨浮能耗，同时减少尾矿产率，缓解尾矿库库容压力，具有较好的技术、经济和环保效果，为实现“无尾矿山”创造了有利条件．

Abstract:

In order to reduce the yield of tailings and improve the overall economic benefits of beneficiation, photoelectric intelligent waste sorting machine was introduced in Panlong Lead-Zinc Mine. For low-grade lead-zinc ore, bench-scale, scale-up continuous and industrial tests were performed to conduct pre-selection and waste disposal. For the +30-75mm particle size, bench-scale test was performed to determine reasonable waste disposal yield being 45%, the lead and zinc recovery in concentrate are 98.10% and 94.77% respectively. For different particle size range, scale-up continuous tests was performed to determine reasonable size range being 10~75mm, the waste disposal yield is 45.95%, the lead and zinc recovery are 97.68% and 94.80% respectively. For the +15-60mm particle size, 20 shifts of comprehensive index was achieved in industrial test, the operation waste rate is 41.20%, and the tailing contains 0.04% Pb and 0.21% Zn, the lead and zinc loss rates are 1.82% and 2.56% respectively, the concentrate contains 1.37% Pb and 5.82% Zn, and the lead and zinc recovery rates are 98.08% and 97.44% respectively. The tests show that the photoelectric intelligent waste disposal technology has a good effect on the waste disposal of low-grade Panlong lead-zinc mine, which can reduce the amount of ore into grinding and increase the grade of feed into grinding-flotation, reduce the energy consumption of plant, and reduce the yield of tailings. So it will alleviate the pressure on the storage capacity of the tailings reservoir, has good technical, economic and environmental protection effects, and create favorable conditions for the realization of "no tailings".