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云锡公司第二冶炼厂处理个旧湖尾矿,用还原焙烧-氨浸取法回收铜.在所得氧化铜及碱式碳酸铜的混合半成品中,含砷5~12.7%,系呈砷酸铜状态存在.由半成品制取金属铜时,需经火法脱砷,精炼及电解精炼等作业,其中砷对劳保及环卫均危害严重,故应预先用湿法除砷为宜.鉴于还原焙烧-氨浸取法处理含砷铜矿时,铜在氨性溶液中呈Cu(NH_3)_6~(2+)存在;砷呈AsO_4~(3-),此时如能预先分开铜与砷则有利.众所周知,待分离组分在溶液中分别呈阴、阳离子状态
The second smelter of Yunxi Company deals with Gejiu Lake tailings and reclaims the copper by the reduction roasting-ammonia leaching method. In the mixed semi-finished product of the obtained copper oxide and basic copper carbonate, the content of arsenic is 5 to 12.7% There is a semi-finished copper metal preparation, the need to fire arsenic removal, refining and electrolytic refining operations, including labor and environmental protection arsenic are endangering, it should be pre-wet arsenic removal is appropriate. In view of the reduction roasting - ammonia When leaching method is used to treat arsenic-bearing copper ores, copper is present in ammoniacal solution as Cu (NH_3) _6 ~ (2+), and arsenic is AsO_4 ~ (3-), in which case it is advantageous to separate copper and arsenic beforehand. , To be separated in the solution components were negative, cationic state