CAJ | 학술논문

绘制了Cu-As-H2O系电位—pH图、不同As浓度下lg(［Cu］T/［As］T) —pH图以及Fe-As(Ⅴ)-H2O系lg［Fe］T—pH图等，分析了由黑铜渣制备砷酸铜过程的热力学。酸性氧化浸出可同时浸出Cu和As， pH=2左右脱铁率可达99%以上。铜砷比和pH值的不同，可以得到不同形式的砷酸铜： CuHAsO4, Cu2AsO4OH， Cu5H2(AsO4)4。在砷酸铜制备工艺条件下，所得砷酸铜分子式为Cu5H2(AsO4)4。热力学分析结果与XRD相一致。
회제료Cu-As-H2O계전위—pH도、불동As농도하lg(［Cu］T/［As］T) —pH도이급Fe-As(Ⅴ)-H2O계lg［Fe］T—pH도등，분석료유흑동사제비신산동과정적열역학。산성양화침출가동시침출Cu화As， pH=2좌우탈철솔가체99%이상。동신비화pH치적불동，가이득도불동형식적신산동： CuHAsO4, Cu2AsO4OH， Cu5H2(AsO4)4。재신산동제비공예조건하，소득신산동분자식위Cu5H2(AsO4)4。열역학분석결과여XRD상일치。
The thermodynamics of copper arsenate preparation from black copper sludge was analyzed by constructing potential—pH diagram of Cu-As-H2O system， lg［Cu］T/［As］T—pH diagram at different concentration of arsenic， lg［Fe］T—pH diagram of Fe-As(Ⅴ)-H2O system. In acid oxidative leaching of the black copper sludge Cu and As can be leached simultaneously; in neutralization process of the mother liquor after copper sulfate crystallization Fe can be precipitated and its separation efficiency reaches more than 99% at pH=2. With the difference of ［Cu］T/［As］T ratio and pH, the different shape copper arsenate: CuHAsO4， Cu2AsO4OH and Cu5H2(AsO4)4 can be formed. Under the technological conditions of copper arsenate preparation the molecular formula of copper arsenate prepared is Cu5H2(AsO4)4.　The result of thermodynamic analysis is consistent with XRD.