锑火法冶炼过程锑、砷物质流分析

Antimony and arsenic substance flow analysis in antimony pyrometallurgical process

应用物质流分析于锑火法冶炼系统。以锑、砷为目标元素,建立基于生产系统的物质平衡表和物质流图,构建有关系统直接回收率、废物回收率、资源效率的评价指标体系。结果表明:锑的资源效率为89.21%,挥发熔炼、还原熔炼和除杂精炼过程锑的直收率分别为78.79%、91.00%和96.06%。同时,每产出1 t金属锑,会有11.94 kg的砷进入到冶炼系统中。砷为冶炼过程主要杂质元素。重点分析砷在主要单元过程中的分布转化行为。基于物质流分析提出提高锑资源利用效率和清洁生产的建议。

Substance flow analysis was applied to an antimony pyrometallurgical system.By taking antimony and arsenic as the objective elements,the mass balance and substance flow charts based on the production system were established,and evaluating indicators such as the direct recovery rate,waste recovery rate,and resource efficiency were set up.The results show that the resource efficiency of antimony is 89.21%,and the recovery rates of antimony in volatilization smelting,reduction smelting,and refining are 78.79%,91.00%,96.06%,respectively.At the same time,for 1 t of antimony produced,11.94 kg of arsenic is carried into the smelting system.Arsenic is a major impurity element in the smelting process.The distribution behavior of arsenic in the main process was analyzed.Based on the substance flow analysis,some recommendations for improving the resource efficiency of antimony and cleaner production were proposed.