粗锡火法精炼除杂工艺除铜实践及除砷试验探索  

Practice of Copper Removal and Arsenic Removal by Crude Tin Fire Refining Process

作　　者：许耀月 XU Yao-yue(Smelting Branch of Yunnan Tin Industry Co.,Ltd.,Gejiu 661000,China)

机构地区：[1]云南锡业股份有限公司冶炼分公司

出　　处：《世界有色金属》2019年第23期16-16,18,共2页World Nonferrous Metals

摘　　要：针对锡火法精炼中粗锡杂质不稳定,砷铁比不稳定,传统方法在粗锡精炼除杂过程中作业时间长,添加剂单耗高的问题,通过将熔融后的粗锡溶液中加入硫元素以及自身中含有的硫元素,与粗锡中的主要杂质铜发生反应,将形成的铜化合物去除;将除铜后的粗锡溶液中加入硝石,再利用NaCl吸收粗锡中的砷与硝石发生反应得到的砷酸盐,以此完成粗锡火法精炼除杂,得到高纯度的锡。In view of the instability of crude tin impurities and unstable arsenic-iron ratio in tin-fired refining,the traditional method has a long operation time and a high consumption of additives in the process of removing impurities in crude tin refining.Add sulfur and the sulfur contained in it,react with the main impurity copper in crude tin to remove the copper compounds formed;add the saltpeter to the crude tin solution after removing copper,and then use NaCl to absorb arsenic in the crude tin The arsenate obtained by reacting with saltpeter is used to complete the crude tin pyrolysis to remove impurities and obtain high-purity tin.

关 键 词：粗锡 火法精炼 除杂 除铜 除砷 

分 类 号：TF811[冶金工程—有色金属冶金]