Study on Arsenic Removal from Arsenic-Bearing Silver Concentrate
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摘要:
这是一篇冶金工程领域的论文。以广西某矿浮选的银精矿为研究对象，通过XRD、TG分析显示，其主要成分为硫化银、硫化铁、毒砂、硫化锰、氧化锰等，煅烧分解温度在470~750 ℃之间。通过热力学软件模拟计算银精矿各组分在含氧氛中的分解产物，并研究了煅烧条件对银精矿中砷的去除影响，结果表明：缺氧气氛有利于毒砂分解为As2O3。较佳的煅烧条件为，以400 mL/min流速通入空气，10 ℃/min程序升温到500 ℃，保温30 min，砷去除率可达到87.66%。
Abstract:This is a paper in the field of metallurgical engineering. Flotation silver concentrate from a mine in Guangxi was characterized by XRD and TG, the result displays that, its main components are silver sulfide, ron sulfide, arsenopyrite, manganese sulfide, manganese oxide, etc, and the calcination decomposition temperature is 470~750 ℃. The decomposition products of each component in an oxygen-containing atmosphere are simulated and calculated by thermodynamic software, and the effect of calcination conditions on the removal of arsenic in silver concentrate is studied, the results of which show that the hypoxic environment is conducive to the decomposition of arsenopyrite into As2O3, and the optimal calcination conditions are as follows: the flow rate of 400 mL /min is through air, the temperature is raised to 500 ℃ at 10 ℃/min, and the removal rate of arsenic can reach 87.66% after holding for 30 min.
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表 1 银精矿主要成分/%
Table 1. Main components of silver concentrate
Ag As Zn Cu S Fe Mn Si 其他 12.74 4.03 2.78 0.46 31.57 10.81 27.65 3.26 6.7 
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