氧化剂对粗铅熔化渣提锡的影响

以高锰酸钾、双氧水、次氯酸钠和氧气为氧化剂,研究了碱法提取粗铅熔化渣中的锡时氧化剂种类对锡浸出率的影响。结果表明,加入氧化剂可以明显提高锡浸出率,其中高锰酸钾对锡浸出率影响最大,双氧水、次氯酸钠的影响次之,鼓风通入氧气有一定作用,但效果不明显。每千克原料较适宜的氧化剂用量分别为:高锰酸钾20g、双氧水600mL、次氯酸钠400mL。

Effects of Oxidants on Tin Extraction from Melted Crude Lead Slag

The effects of oxidants, i.e. potassium permanganate, hydrogen peroxide, sodium hypochlorite, and oxygen on tin extraction from melted crude lead residue with alkaline process were investigated. The results show that the leaching rate of tin can be improved by the adding of oxidants, in which potassium permanganate is the crucial factor influencing the leaching rate followed by hydrogen peroxide and sodium hypochlorite. Blowing oxygen (air) has no obvious effect. The optimum dosage of oxidants for every kilogram of raw materials includes potassium permanganate of 20 g, hydrogen peroxide of 600 mL, and sodium hypochlorite of 400 mL.