高砷锑烟尘中砷锑的回收

来源期刊：中南大学学报(自然科学版)1991年第2期

论文作者：段学臣

文章页码：149 - 155

关键词：氯化; 蒸馏; 砷; 锑; 回收

Key words：chlorite; distil; arsenic; antimony; recovery

摘    要：本文采用低温氯化-蒸馏法处理高砷锑烟尘,使砷与锑达以分离;砷的回收先用Na₂S使其沉淀为As₂S₃,再用CuSO₄溶液浸出,然后浓缩、结晶出As₂O₃;锑的回收采用升温蒸馏法获SbCl₃。该法流程和设备较简单,砷锑分离彻底,污染小,试剂消耗低,产品纯度均高达99.9％以上,有显著的社会效益和经济效益。

Abstract: Low temperature chlorination leaching-distilling process is adopted in this paper to treat smoky dust with high content of arsenic and antimony so as to separate arsenic and antimony. Na₂S is used to precipate As₂S₃ which is then leached by using CuSO₄ solution and concentrated into crystallized As₂O₃. Antimony is recovered by using rising temperature distilling method to condense SbCl₃. This technique has many advantages-simple flowsheet and equipment, thorough separation between arsenic and antimony, low consumption and cost, high purity of products (above 99. 9%), and conspicuous social and economic benefit.