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The preparation of copper arsenite with arsenic trioxide was presented and its application in the purification of copper electrolyte was proposed. The variables of n(OH^-)/n(As), n(Cu)/n(As), NaOH concentration, reaction temperature and pH value have some effects on the yield of copper arsenite. The optimum conditions of preparing copper arsenite are that the molar ratio of alkali to arsenic is 2:1, NaOH concentration is 1 mol/L, the molar ratio of copper to arsenic is 2:1, pH value is 6.0 and reaction temperature is 20℃. The yield of copper arsenite is as high as 98.65% under optimum conditions and the molar ratio of Cu to As in the product is about 5:4. The results of the purification experiments show that the removal rate of antimony and bismuth is 53.85% and 53.33% respectively after 20g/L copper arsenite is added. The purification of copper electrolyte with copper arsenite has the advantages of simple technique, good purification performance and low cost.  相似文献   
2.
Copper electrolyte was purified by copper arsenite that was prepared with AS2O3. And electrolysis experiments of purified electrolyte were carried out at 235 and 305 A/m^2, respectively. The results show that the yield of copper arsenite is up to 98.64% when the molar ratio of Cu to As is 1.5 in the preparation of copper arsenite. The removal rates of Sb and Bi reach 74.11% and 65.60% respectively after copper arsenite is added in electrolyte. The concentrations of As, Sb and Bi in electrolyte nearly remain constant during electrolysis of 13 d. The appearances of cathode copper obtained at 235 and 305 A/m^2 are slippery and even, and the qualification rate is 100% according to the Chinese standard of high-pure cathode copper(GB/T467-97).  相似文献   
3.
Novel technology of purification of copper electrolyte   总被引:11,自引:1,他引:10  
The effects of arsenic with different valence states on the purification of copper electrolyte were studied and a novel technology of purification of copper electrolyte by copper arsenite was proposed. The results show that the purification performance of As(Ⅲ) compounds is better than that of As(Ⅴ) compounds. The purification technology by copper arsenite has the advantages of simple operation, high purification performance and low cost in comparison with other technologies and its appropriate purification conditions are that copper arsenite concentration is 18 g/L, reaction temperature is 65 ℃ and reaction time is 8 h. The removal rates of Sb and Bi are 53.22% and 58.67% respectively under these conditions. The purification principle show that a kind of yellow precipitate mainly composed of arsenic, antimony ( Ⅴ ), bismuth and oxygen forms in electrolyte after copper arsenite is added, and consequently antimony and bismuth are removed from electrolyte.  相似文献   
4.
高锑铋复杂含银物料中有价金属的综合回收   总被引:1,自引:0,他引:1  
以某厂铜阳极泥处理后得到的高锑铋复杂含银物料为原料,采用甘油的碱溶液浸出的方法,对含银复杂物料中的铜、锑、铋等有价金属的浸出进行较为系统的研究并优化了相关的工艺条件。研究了NaOH浓度、C3H8O3浓度、液固比、反应时间与温度等因素对浸出的影响,在优化条件下浸出时,铜、铋、锑的浸出率分别为96.73%、96.44%、85.91%。  相似文献   
5.
介绍了大冶诺兰达熔炼工艺10年来的技术进步,指出了存在的问题及完善改进方向.  相似文献   
6.
Purification mechanism of copper electrolyte by As(Ⅲ)   总被引:4,自引:0,他引:4  
A new kind of precipitate, antimony arsantimonate, was found during the precipitation reactions in acidic solution containing As(Ⅲ), Sb(Ⅲ) and Sb( Ⅴ ) by means of chemical analysis, SEM, XRD and IR spectrometry. The results show that the As content in antimony arsantimonate increases with the increase of n(As(Ⅲ)/n(Sb) in solution and the content of component Sb(Ⅲ) and Sb(Ⅴ) remains almost constant with the variation of n(Sb(Ⅲ))/n(Sb(Ⅴ)) in solution. The antimony arsantimonate is a kind of floccules with size of 1-5 μm. The crystal performance of the compound gets better with the decrease of n(As(Ⅲ))/n(Sb), the cell parameter of which is near to 10.33×10^-10m under different n(As(Ⅲ))/n(Sb) and As atom locates on the surface, not in the inner of the grain. The chemical bonds of As--OH, Sb---OH, As---O--Sb, Sb--O---Sb and O---H of the precipitate are included in the precipitate. The chemical structure of precipitate is described as Sb(OH)2---O--[Sb(OH)3--(O---As(OH)--O---Sb(OH)3)3]----O--- Sb(OH)2·xH2O. The structure analysis shows that the copper electrolyte can be purified by As(Ⅲ) because the antimony arsantimonate precipitate forms.  相似文献   
7.
介绍了大冶诺兰达熔炼工艺10年来的技术进步,指出了存在的问题及完善改进方向。  相似文献   
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