| 湖北某铜矿低碱度浮选工艺研究 |
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| 引用本文： | 于俊杰,曾海鹏,舒有顺,黄红军.湖北某铜矿低碱度浮选工艺研究[J].矿产保护与利用,2022,42(1):112-117. |
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| 作者姓名： | 于俊杰 曾海鹏 舒有顺 黄红军 |
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| 作者单位： | 中南大学 资源加工与生物工程学院, 湖南 长沙 410083 |
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| 基金项目： | 国家"十三五"重点研发计划项目2019YFE012999 |
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| 摘 要： | 湖北某铜矿含铜0.67%和钼0.012%, 现场采用高碱度铜钼混合浮选工艺, 存在石灰用量高和废水难处理等问题。通过组合捕收剂的使用及调整矿浆电位, 在石灰和过氧化钙用量各为400 g/t、组合捕收剂丁基黄药+乙硫氮(质量比1 ∶ 1)用量80 g/t的条件下(此时矿浆pH为10.5、矿浆电位177.4 mV)进行一次粗选, 可获得铜品位14.4%、回收率88.42%, 钼品位0.16%、回收率58.3%的粗精矿。当添加巯基类药剂ZN-1 40 g/t与组合捕收剂共同使用时, 金回收率可提高13百分点, 银回收率提高2百分点。紫外光谱吸附量测定表明, 在相同条件下每克黄铜矿表面吸附0.33 mg组合捕收剂, 高于单一丁基黄药(0.19 mg)和单一乙硫氮(0.27 mg), 因此强化了捕收效果。采用一次粗选、一次精选、两次扫选闭路流程, 获得的铜钼混合精矿铜品位19.55%、回收率96%, 钼品位0.32%、回收率56.25%, 较现场高碱度浮选流程铜品位提高0.5百分点, 回收率提高3百分点, 实现了低碱度条件下浮选。
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| 关 键 词： | 低碱度浮选 组合捕收剂 过氧化钙 铜矿 药剂吸附量 |
| 收稿时间： | 2021-12-14 |
Research on Low Alkali Flotation Process of a Copper Mine in Hubei |
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| Affiliation: | School of Minerals Processing and Bioengineering. Central South University, Changsha 410083, Hunan, China |
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| Abstract: | Copper ore in Hubei contains 0.67% copper and 0.012% molybdenum. The high-alkaline copper-molybdenum mixed flotation process was used on site which caused problems such as high lime consumption and difficult wastewater treatment. Through the use of combined collectors and adjustment of ore slurry potential, under the conditions of lime and calcium peroxide dosages of 400 g/t respectively, and the dosage of butyl xanthate + ethyl sulfoxide (mass ratio 1:1) was 80 g/t (at this time, the pH of the pulp is 10.5, and the potential of the pulp is 177.4 mV). A rough concentrate with a copper grade of 14.4%, a recovery rate of 88.42%, a molybdenum grade of 0.16%, and a recovery rate of 58.3% was obtained. When sulfhydryl agents were added together with collectors, a gold recovery increases from 55% to 68% when the dosage is increased from 0 g/t to 40 g/t, an increase of 13%; the silver recovery increases from 66 % to 68%, an increase of 2%. Ultraviolet adsorption capacity tests show that under the same conditions, 0.34 mg of combined collector could be absorbed on per gram of copper pyrite surface, which was higher than 0.2 mg of single butyl xanthate and 0.28 mg of single ethyl disulfide, which enhanced the collection effect. Using a closed-circuit process of one roughing, one cleaning and two scavenging, the bulk concentrate with a copper grade of 19.555%, recovery of 96%, and a molybdenum grade of 0.32%, recovery of 56.25% was obtained. Compared with the field high alkaline flotation process, the copper grade and recovery of concentrate increased under low alkalinity flotation conditions. |
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