高砷烟尘碱浸—苛化脱砷处理  

Alkali leaching causticization arsenic removal of high arsenic flue dust

作　　者：袁玲玲 赵辉 王永梅 李雪山 李莎莎 YUAN Ling-ling;ZHAO Hui;WANG Yong-mei;LI Xue-shan;Li Sha-sha(Shandong Humon Smelting Co.,Ltd,Yantai 264109,China)

机构地区：[1]山东恒邦冶炼股份有限公司,山东烟台264109

出　　处：《世界有色金属》2021年第16期102-104,共3页World Nonferrous Metals

摘　　要：本文采用碱浸-苛化工艺对高砷烟尘进行脱砷探究,在NaOH浓度为50g/L,Na;S用量为(Cu+Pb)摩尔数的1.3倍、浸出温度为90℃、浸出时间为2h,液固比为5.0最优条件下,As浸出率为85.61%,浸出渣中含铅45%,含铜5%,含锌3%,含As低于3%。碱浸渣可直接返回铅厂回收铅铜锌。碱浸液加入熟石灰用量按照Ca/As摩尔比3:1进行苛化处理,As的脱除率高达99%以上。再生碱浸液可返回碱浸工序,实现了高砷烟尘中As与其他有价金属的有效分离。In this paper,alkali leaching causticization process was used to remove arsenic from high arsenic dust.Under the optimal conditions of NaOH concentration of 50g/L,Na;S dosage of 1.3 times of (Cu + Pb) mole number,leaching temperature of 90℃,leaching time of 2h and liquid-solid ratio of 5.0,the leaching rate of as was 85.61%,the leaching residue contained 45% lead,5% copper,3% zinc and less than 3% as.Alkali leaching residue can be directly returned to lead plant to recover lead,copper and zinc.The removal rate of as can reach more than 99% by caustic treatment with Ca/As molar ratio of 3:1.The regenerated alkali leaching solution can be returned to the alkali leaching process,which can effectively separate as from other valuable metals in high arsenic dust.

关 键 词：高砷烟尘 碱浸-苛化工艺 脱砷 综合回收 

分 类 号：TF81[冶金工程—有色金属冶金]