| Coupling leaching of sphalerite concentrate |
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| 引用本文： | 彭鹏,谢惠琴,卢立柱. Coupling leaching of sphalerite concentrate[J]. 中国有色金属学会会刊, 2004, 14(6): 1227-1231 |
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| 作者姓名： | 彭鹏 谢惠琴 卢立柱 |
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| 作者单位： | [1]InstituteofProcessEngineering,ChineseAcademyofSciences,Beijing100080,China／／EngineeringCommandInstituteofChemicalDefence,Beijing102205,China [2]InstituteofProcessEngineering,ChineseAcademyofSciences,Beijing100080,China |
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| 摘 要： | Coupling process of sphalerite concentrate leaching in H2SO4-HNO3 and tetrachloroethylene extracting of sulfur was investigated. Effects of leaching temperature, leaching time, mass ratio of liquid to solid and tetrachloroethylene addition on zinc leaching processes were examined separately. SEM images of sphalerite concentrate and residues were performed by using JEM-6700F field emission scanning electron microscope. The relationship between the number of recycling and extraction ratio of zinc was studied. The results indicate that 99.6% zinc is obtained after leaching for 3 h at 85℃ and pressure of 0.1MPaO2, with 20g sphalerite concentrate in 200 mL leaching solution containing 2.0mol/L H2SO4 and 0.2mol/L HNO3, in the presence of 10 mL C2Cl4. The leaching time of zinc is 50% shorter than that in the common leaching. The coupling effect is distinct. The recycled C2Cl4 exerts little influence on extraction ratio of zinc.
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| 关 键 词： | 耦合过滤法 闪锌矿 硫酸-硝酸 溶液浓度 C2Cl4回收 |
Coupling leaching of sphalerite concentrate |
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| PENG Peng. Coupling leaching of sphalerite concentrate[J]. Transactions of Nonferrous Metals Society of China, 2004, 14(6): 1227-1231 |
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| Authors: | PENG Peng |
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| Abstract: | Coupling process of sphalerite concentrate leaching in H2 SO4-HNO3 and tetrachloroethylene extracting of sulfur was investigated. Effects of leaching temperature, leaching time, mass ratio of liquid to solid and tetrachloroethylene addition on zinc leaching processes were examined separately. SEM images of sphalerite concentrate and residues were performed by using JEM-6700F field emission scanning electron microscope. The relationship between the number of recycling and extraction ratio of zinc was studied. The results indicate that 99.6 % zinc is obtained after leaching for 3 h at 85 ℃ and pressure of 0.1 MPa O2, with 20 g sphalerite concentrate in 200 mL leaching solution containing 2.0 mol/L H2SO4 and 0.2 mol/L HNO3, in the presence of 10 mL C2Cl4. The leaching time of zinc is 50% shorter than that in the common leaching. The coupling effect is distinct. The recycled C2Cl4 exerts little influence on extraction ratio of zinc. |
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| Keywords: | sphalerite H2 SO4-HNO3 coupling leaching |
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