Mix Concentration Of Zinc Phase Analysis Study

The method of the chemical phase analysis of zinc in lead and zinc concentrate was developed. The character of the lead and zinc concentrate from Shaoguan Smelter was studied by X-ray fluorescence, X-ray diffraction and chemical component analysis. The zinc phases are divided into three classes of sulfide. sulfate and carbonate . Based on the research , the extraction and separate system of water—vinegar separation was put forward.The factors effecting on the extraction and separate, such as temperature, concentration of solvent and the time, were studied. The separation and determination process is follow : (1) The zinc of sulfate is extracted by water in normal temperature with stirring for 40 minutes.(2) The zinc of sulfate and zinc of carbonate are extracted by 20% vinegar in 80℃ in another sample with stirring for 40 minutes. The concentration of the carbonate zinc is obtained by the minus method. (3) The zinc of sulfate is determined in the residue.(4) The zinc in the separation solution and the leach residue is determined by EDTA titrimetry and atomic absorption spectrometry.The new chemical phase method was evaluated by the synthetic samples and the standard addition method. The recoveries are ZnS 99.7%-100.7%, ZnSO₄ 95.3%-101.4%, ZnCO₃ 96.1%-100.9% separately . The RSD (n=5) of the synthesized samples (ZnS 75.23%,ZnSO₄ 12.64%,ZnCO₃ 12.62%) are ZnS 0.234%, ZnSO₄ 0.086% and ZnCO₃ 0.02% separately.The mechanism of solvent extraction and the effect of pH on solution equilibrium were also studied in this article.