摘要
根据新疆某地区磷灰石性质,采用单反浮选试验流程确定磨矿细度,调整剂、抑制剂、捕收剂用量,浮选时间等试验条件,并在所得到的试验条件基础上设计开路和闭路工艺流程.试验结果表明:在磨矿细度＜0.074 mm的颗粒占比为48.97％,粗选一调整剂碳酸钠用量为1 500g/t、组合抑制剂水玻璃+CMC用量为800g/t+200g/t、捕收剂用量为1 000g/t、粗选时间2 min,粗选二水玻璃+CMC用量为200 g/t+50 g/t、捕收剂用量为400 g/t、起泡剂用量为20g/t、粗选时间为1min的试验条件下进行两次粗选两次精选闭路试验,可获得精矿产率为14.60％、w(P205)为31.87％,P2O5回收率为96.63％的选别指标.对该法选矿成本进行估算,并与云南省选矿成本及外购成本进行比较.
Abstract
Based on the properties of apatite rock in a certain area of Xinjiang,a single reverse flotation test process is adopted to determine the grinding fineness,dosage of adjusting agent,inhibitor,collector,flotation time and other experimental conditions.Based on the obtained experimental conditions,open circuit and closed circuit process flows are designed.The experimental results show that under the experimental conditions of grinding fineness＜0.074 mm particle proportion of 48.97％,sodium carbonate dosage of 1 500 g/t,combination inhibitor sodium silicate+CMC dosage of 800 g/t+200 g/t,collector dosage of 1 000 g/t,coarse selection time of 2 minutes in first coarse selection process,sodium silicate+CMC dosage of 200 g/t+50 g/t,collector dosage of 400 g/t,foaming agent dosage of 20 g/t,and coarse selection time of 1 minute in second coarse selection process,two coarse selection and two closed circuit experiments can be carried out,resulting in a concentrate yield of 14.60％,w(P2O5)of 31.87％,and a recovery rate of 96.63％.The flotation cost of this method is estimated and compared with the flotation cost in Yunnan province and procurement costs.
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