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Effect of flotation reagents on the Cake Moisture of Copper Concentrate

International Journal of Minerals,Metallurgy and Materials 2000年第3期14卷 161-164页

作者： Tichang Sun, Quanyuan Song, Chengfan Hu, Aiguo Yu ( Resources Engineering School, University of Science and Technology Beijing, Beijing 100083, China Daye Iron Mine, Tieshan District, Huangshi, Hubei 435006, China) Resources Engineering School University of Science and Technology Beijing Beijing 100083 China Daye Iron Mine Tieshan District Huangshi Hubei 435006 China

The effect of reagents used in separating chalcopyrite from pyrite on the cake moisture of the copper concentrate at Daye Iron Mine Mineral Processing Plant was investigated. The results showed that the dosage of lime used for depressing pyrite was the main factor that increased the filter cake moisture of copper concentrate. With increasing the dosage of lime, the cake moisture of copper concentrate increased sharply. The cause was concluded to be the addition of lime to the pulp, which resulted in the formation of floc and a high pH value. The collector Z-200#, used for collecting chalcopyrite, had, as well, an adverse effect on the cake moisture of copper concentrate, but its effect was inferior in respect to that of lime. The cake moisture of copper concentrate can be decreased by changing the method with which lime is added and the pH value of pulp is regulated. The experiment results showed that the sulfuric acid was the best regulator. When the clarified liquor of lime was used as a depressant and the pH value of the pulp was regulated to 6.5€*7.0 by adding sulfuric acid, the cake moisture of copper concentrate was reduced from 15.49% to 13.13%. The examination of chalcopyrite surface by using ESCA (Electron Spectroscopy for Chemical Analysis) showed that calcium sulfate and iron hydroxide had formed on the surface of chalcopyrite when lime was added to the pulp. The formation of calcium sulfate and iron hydroxide on its surface increased the hydrophilicity of chalcopyrite so that its cake moisture increased. The addition of sulfuric acid to the pulp not only removed the calcium sulfate, but also reduced the concentration of iron hydroxide on the surface of chalcopyrite so that the cake moisture of copper concentrate was decreased.

关键词： flotation reagents filtration copper concentrate cake moisture ESCA

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Structure–activity relationship and mechanisms of reagents used in scheelite flotation

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Rare Metals 2015年第12期34卷 882-887页

作者： Wan-Zhong Yin Ji-Zhen Wang Zhong-Mei Sun School of Resource and Civil Engineering Northeastern University Design & Research Institute of Zijin

Effects of carboxylic acid collector, benzohydroxamic acid (BHA), sodium hexametaphosphate (SHAP), sodium silicate, and oxalic acid on scheelite flotation were studied through flotation tests, quantum chemical calculation, and flotation solution computational chemistry. In terms of the calculation results, the relationship between chemical reactions occurring on the scheelite surface and molecular structures of the reagents were analyzed. The results show that BHA and carboxylic acid collectors interact with scheelite in different forms and the recovery of scheelite using sodium oleate as collector declines successively from SHAP, sodium silicate, to oxalic acid. Moreover, it is found that the performance of depressant in scheelite flotation is directly related to the group electronegativity, indicating that the latter is a dominant factor that determines the former. These findings will be helpful to the academic research communities of scheelite flotation.

关键词： Scheelite flotation flotation reagents Structure–activity relationship

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Optimization of reagent dosages for copper flotation using statistical technique

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Transactions of Nonferrous Metals Society of China 2010年第12期20卷 2371-2378页

作者： Y.VAZIFEH E.JORJANI A.BAGHERIAN Department of Mining Engineering Science and Research BranchIslamic Azad UniversityPoonakHesarakTehranIran Metallurgy Division Sungun Copper Concentrator PlantVarzaghanTabrizIran

The effects of Z11 and AP407 collectors as well as AF65 and AF70 frothers were evaluated in the rougher flotation circuit of the Sungun copper concentrator plant using 2 4 full factorial *** functions were produced for both Cu grade and recovery and optimized within the experimental *** optimum reagent dosages were found to be 12.01 g/t Z11,11 g/t AP407,3 g/t AF65 and 5 g/t AF70 to attain the maximum Cu grade(8.17%).The reagent dosages of 12 g/t Z11,11 g/t AP407,3 g/t AF65 and 15 g/t AF70 produced the maximum Cu recovery(86.44%).The collector distribution demonstrated that the distribution pattern of(32%,32%,20%,16%)can produce the best recovery(87.75%)in comparison to other examined distribution patterns.

关键词： copper sulphide ores flotation reagents modelling optimization

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浮选药剂中典型污染物PASH 的GC-MS检出

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分析测试学报 2001年第Z1期20卷 185-186页

作者：栾和林姚文北京矿冶研究总院资评所环境有机北京100044 北京矿冶研究总院资评所环境有机北京100044

有机含硫芳香化合物(PASH)性质稳定,不宜降解,毒性极强,且比多环芳烃和含氮杂环化合物更具致癌性[1,2].PASH包括含芳基的硫醇、硫醚、二硫代物噻吩及其同系物,还有苯并噻吩类、二苯并噻吩类.……

关键词：浮选药剂污染物 flotation reagents 苯并噻吩类有机含硫芳香化合物含氮杂环化合物多环芳烃致癌性同系物二硫代硫醚硫醇降解芳基毒性

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Calculation of topological connectivity index for minerals

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中国有色金属学会会刊：英文版 2001年第5期11卷 790-794页

作者：曹育才蒋玉仁薛玉兰姜玄珍浙江大学化学系浙江杭州 310027 中南大学矿物工程系湖南长沙 410083

Topological method was applied firstly to calculate the topological connectivity index of minerals (TCIM). The reciprocal of effective atomic refractivity of metal element in minerals was chosen as its valence. The reasonability of TCIM as an activity criterion was tested through comparison of TCIM with two kinds of electronegativity parameter, i.e. ionic percentage and energy criteria of Yang’s electronegativity, solubility product, energy criterion according to the generalized perturbation theory and adsorption of flotation reagents on the surface of minerals. The results indicated that TCIM is an effective structural parameter of minerals to study the structure activity relationship. In addition, different mineral is of different TCIM value, so TCIM brings about convenience in comparison of flotation activity for minerals.

关键词： topological connectivity index of minerals minerals flotation reagents

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