催化氯化法浸金研究

Study on leaching gold by catalytic chlorination method

研究了ＮａＣｌ的酸性和中性溶液中用溴化物作催化剂，工业用的次氯酸钠溶液氧化剂，考察了ＫＢｒ、ＮａＣｌ及ＮａＣｌＯ浓度，浸出时间和固液比对浸金率的影响。得到优选的试验条件为［ＮａＣｌ］２％～１０％（酸性～中性）；［ＫＢｒ］１～２ｇ／Ｌ；［ＮａＣｌＯ］３～４ｇ／Ｌ；时间２～３ｈ；固液比１∶６。

This paper makes study on effects of several factors such as leaching time,solid liquid ratio,concentration of KBr,NaCl,and NaClO on gold leaching in acid and neutral sodium chloride solution with bromide as catalyzator and industrial sodium chlorite as oxidizer.The optimal experimental condition is listed as follows::2%～10%(acid～pH=7);:1～2g/L,:3～4g/L;leaching time:2～3h,solid liquid weight ratio:1∶6