锑冶炼中砷碱渣与二氧化硫烟气综合回收清洁工艺探讨

通过将炼锑中产生的含砷碱渣经过浸出、含砷碱溶液吸收废气二氧化硫、硫化钠等硫化剂脱砷、硫酸铁深度除砷以及净化浓缩干燥等过程后,难以处理的砷碱渣和废气低含量的二氧化硫得到彻底处理。整个处理过程,锑回收率达到99%,砷开路率超过90%,二氧化硫经吸收超过95%,使气体达到排放标准,碱转化为亚硫酸钠,达到了以废治废的目的,是一种清洁炼锑的工艺。

Comprehensive Recovery of Clean Technology from Arsenic-alkali Residue and Sulfur Dioxide in Antimony Smelting

After the arsenic-alkali residue produced in antimony smelting handled by leaching,absorption of alkaline solution containing arsenic with emissions of sulfur dioxide,sodium sulfide and other sulfide solvent for removing arsenic,and with ferric sulfate for the depth of the removal of arsenic,purification and concentration and drying process,the intractable arsenic-alkali residue and low content sulfur dioxide emissions are thoroughly treated.In the whole treatment process,recycling rate of antimony is 99%,open circulation rate of arsenic is over 90%,sulfur dioxide by absorbing is more than 95% which makes the gas for emission reach the standard,and alkali transforms into Sodium Sulfite.Waste in antimony smelting reaches comprehensive treatment,and it is a clean process.