含铜废催化剂中铜的回收

Recovery of Copper from Spent Copper-containing Catalyst

采用热解—氨浸工艺处理含铜废催化剂(w(Cu)为23.6%),优化了工艺条件,并通过蒸氨还原法制备出Cu2O产品。实验结果表明:热解工段中,控制管式热解炉的空气流量为3.0 m3/min,在升温速率20℃/min、热解终温600℃、终温保持时间90 min的优化条件下,含铜废催化剂中的有机物热解完全;氨浸工段中,以NH4Cl-NH3-H2O溶液为氨浸液,控制氨浸温度为40℃,在烧成料研磨时间90 min(粒径29.43μm)、氨浸液总氨浓度4 mol/L、氨浸时间80 min的优化条件下,铜浸出率达到98%;经蒸氨还原法制得的Cu2O产品的质量符合HG/T 2961—2010《工业氧化亚铜》中的一等品标准,产率为24%。

Spent cooper-containing catalyst with 23.6% of w（Cu） was treated by pyrolysis - ammonia leaching. The process conditions were optimized and Cu20 was prepared by evaporating ammonia reduction. The experimental results show that： In the pyrolysis section, the organic compounds in the spent copper- containing catalyst can be decomposed completely under the optimum conditions of air flow in the tube furnace 3.0 ma/min, heating rate 20 ℃/min, final pyrolysis temperature 600 ℃ and holding time 90 min; In the ammonia leaching section, the copper leaching rate can reach 98% under the optimum conditions of using NH4Cl-NH3-H2O solution as leaching solution with 4 mol/L of total ammonia concentration, ammonia leaching temperature 40 ℃, ammonia leaching time 80 min, sintered particle diameter 29.43 μm. The quality of Cu2O product can meet the first grade standards of HG/T 2961-2010, and the yield of Cu2O is 24%.