铜-锌-硫混合粗精矿的选择性浮选分离
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摘要
细粒嵌布型铜锌硫化矿采用粗磨后混合浮选工艺,具有回收率高和成本低的优势,但对所产出的混合精矿,亟需解决铜、锌、硫之间的高效彻底分离。云南玉溪地区铜锌硫混合粗精矿,其细度为-74μm 75%,含Cu 2.45%、Zn 4.93%、S 31.21%,笔者采用粗精矿再磨-铜、锌、硫选择性浮选分离工艺,研究了再磨细度、药剂种类、用量等因素对各矿物分离效果的影响。当粗精矿再磨细度为-38μm90%时,闭路试验获得品位和回收率均较高的铜、锌和硫精矿产品,铜精矿含Cu 21.00%,Cu回收率84.27%,锌精矿含Zn 48.37%,Zn回收率85.94%,硫精矿含S37.90%,S回收率82.85%,混合精矿中的铜矿物、锌矿物、硫矿物均实现了较彻底的分离。本研究为铜多金属混合精矿的有效分离提供了一种可资借鉴的方法。
The application of mixture flotation process after rough grinding ores of fine-grained embedded copper-zinc sulfides has advantages of high recovery and low cost. However, the bulk concentrate needs urgently to be processed for a highly efficient and complete separation of copper, zinc and sulphur concentrates. The bulk copper-zinc-sulfur concentrate from the Yuxi plant in Yunnan Province contains Cu 2.45%, Zn 4.93%, and S 31.21%, with 75% grain fineness of less than74 μm. Based on the selective flotation separation experiment of the reground copper-zinc-sulfur bulk concentrate, this paper has discussed the influence on effect of mineral separation by various factors including the regrinding fineness, agent type and dosage, etc. When over 90% of the coarse concentrate was reground to fineness of less than 38 μm, high recoveries of Cu, Zn and S concentrates have been obtained in the closed-circuit test, with recoveries of 84.27%, 85.94%, and 82.85% for concentrates at Cu grade of 21.00%, Zn grade of 48.37%, and S grade of 37.90%, respectively. This processing technique results in the relatively complete separation of chalcopyrite, sphalerite and pyrite in the bulk concentrate. This study has provided a useful referencing method for the effective separation of various sulphides from the copper-polymetallic bulk concentrate.
The application of mixture flotation process after rough grinding ores of fine-grained embedded copper-zinc sulfides has advantages of high recovery and low cost. However, the bulk concentrate needs urgently to be processed for a highly efficient and complete separation of copper, zinc and sulphur concentrates. The bulk copper-zinc-sulfur concentrate from the Yuxi plant in Yunnan Province contains Cu 2.45%, Zn 4.93%, and S 31.21%, with 75% grain fineness of less than74 μm. Based on the selective flotation separation experiment of the reground copper-zinc-sulfur bulk concentrate, this paper has discussed the influence on effect of mineral separation by various factors including the regrinding fineness, agent type and dosage, etc. When over 90% of the coarse concentrate was reground to fineness of less than 38 μm, high recoveries of Cu, Zn and S concentrates have been obtained in the closed-circuit test, with recoveries of 84.27%, 85.94%, and 82.85% for concentrates at Cu grade of 21.00%, Zn grade of 48.37%, and S grade of 37.90%, respectively. This processing technique results in the relatively complete separation of chalcopyrite, sphalerite and pyrite in the bulk concentrate. This study has provided a useful referencing method for the effective separation of various sulphides from the copper-polymetallic bulk concentrate.
引文
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[5] López-Valdivieso A, Lozano-Ledesma L A, Robledo-Cabrera A, et al. Carboxymethylcellulose(CMC)as PbS depressant in the processing of Pb-Cu bulk concentrates. Adsorption and floatability studies[J]. Minerals Engineering, 2017, 112:77-83.
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[7]逄军武,王立辉,李磊,等.西藏某高硫铜铅锌硫化矿浮选试验研究[J].中国矿业, 2016, 25(5):116-120.
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[9]谢海云,叶群杰,周平,等.云南思茅地区铜锌硫化矿工艺矿物学分析[J].岩矿测试, 2014,(3):345-352
[10]谢海云,周平,庄故章,高利坤,等.云南典型铜锌硫化矿混合浮选抛尾研究[J].昆明理工大学学报(自然科学版), 2014, 39(2):23-27.
[11]朱玉霜,朱建光.浮选药剂的化学原理[M].长沙:中南工业大学出版社, 1987.
[12]邓洋洋,曹亦俊,马子龙,等.山东某选矿厂铜锌混合精矿分离研究[J].矿产综合利用, 2017(4):70-72.
[13] Boulton A, Fornasiero D, Ralston J. Depression of iron sulphide flotation in zinc roughers[J]. Minerals Engineering, 2001, 14(9):1067-1079.
[14]卢琳,伦绍雄.铜锌混合精矿分离组合抑制剂试验研究[J].矿产综合利用, 2017(2):40-43.
[2]郭玉武.提高吉林某铜锌硫化矿选矿指标的试验研究[J].矿冶工程, 2016, 36(4):53-56.
[3] Bocharov V A, Ignatkina V A, Kayumov A A. Rational separation of complex copper–zinc concentrates of sulfide ore[J]. Journal of Mining Science,2016, 52(4):793-801.
[4] Lazi?P, Vu?ini?D, Stanojev J, et al. Direct selective lead, copper and zinc minerals flotation from polymetallic ore “Podvirovi”[J]. Journal of Mining Science, 2010, 46(6):690-694.
[5] López-Valdivieso A, Lozano-Ledesma L A, Robledo-Cabrera A, et al. Carboxymethylcellulose(CMC)as PbS depressant in the processing of Pb-Cu bulk concentrates. Adsorption and floatability studies[J]. Minerals Engineering, 2017, 112:77-83.
[6]曹攀,王军,胡喆,等.大厂铅锌多金属硫化矿混合精矿浮选新工艺探索[J].矿冶工程, 2016, 36(5):44-48.
[7]逄军武,王立辉,李磊,等.西藏某高硫铜铅锌硫化矿浮选试验研究[J].中国矿业, 2016, 25(5):116-120.
[8]余力,刘全军,袁华玮,等.铜铅混合精矿浮选分离工艺研究[J].昆明理工大学学报(自然科学版), 2017(1):26-33.
[9]谢海云,叶群杰,周平,等.云南思茅地区铜锌硫化矿工艺矿物学分析[J].岩矿测试, 2014,(3):345-352
[10]谢海云,周平,庄故章,高利坤,等.云南典型铜锌硫化矿混合浮选抛尾研究[J].昆明理工大学学报(自然科学版), 2014, 39(2):23-27.
[11]朱玉霜,朱建光.浮选药剂的化学原理[M].长沙:中南工业大学出版社, 1987.
[12]邓洋洋,曹亦俊,马子龙,等.山东某选矿厂铜锌混合精矿分离研究[J].矿产综合利用, 2017(4):70-72.
[13] Boulton A, Fornasiero D, Ralston J. Depression of iron sulphide flotation in zinc roughers[J]. Minerals Engineering, 2001, 14(9):1067-1079.
[14]卢琳,伦绍雄.铜锌混合精矿分离组合抑制剂试验研究[J].矿产综合利用, 2017(2):40-43.