铜冶炼过程汞的流向和分布

Flow Direction and Distribution of Mercury in Copper Smelting Process

利用物料衡算法对云南省某铜冶炼企业铜冶炼过程中汞的流向进行系统分析。结果表明,铜冶炼系统中的汞主要来自铜精矿;经过制酸工艺,汞绝大部分进入到酸泥、污酸中,一部分进入到硫酸产品中,很少一部分随烟气排放;烟气中的汞能够达到规定的排放限值;经过污水处理系统,污酸中的汞进入到砷钙渣、中和渣和石膏渣中,回用水指标合格。

Mercury flow in copper smelting process of a copper smelting enterprise in Yunnan Province was systematically analyzed by material balance algorithm.The results show that mercury mainly comes from copper concentrate in copper smelting system.Most of mercury enteres into acid mud and waste acid,some enteres into sulfuric acid,and few is charged with smoke during acid making.Mercury in flue gas meets the emission limits.After treated by sewage disposal system,mercury in waste acid enteres into arseniccalcium slag,neutralization slag and gypsum slag.The return water index was qualified.