摘要
研究了"酸化法+SO_2-空气法"处理黄金冶炼厂含氰废水工艺,小试研究结果表明:在酸化p H值2.5、吹脱温度30℃、吹脱气液比400∶1的条件下进行酸化、吹脱,Cu、Zn、Fe、TCN的去除率分别为99.8%、99.6%、97.8%、95.4%;吹脱后液再经SO_2-空气法处理,出水Cu 0.32 mg/L、Zn 0.40 mg/L、TCN 0.34 mg/L;生产结果表明:"酸化法+SO_2-空气法"处理含氰废水既可实现氰化物、铜的资源化回收,又能实现氰化物、重金属离子的无害化处理,最终出水Cu、Zn、TCN符合《GB8978-1996污水综合排放标准》一级排放标准,具有良好的经济效益和环境效益。
Cyanide wastewater in a gold smelter was treated by ＂acidification＋SO2-air＂ method. The test results showed that under the condition of pH value 2.5, stripping temperature 30 ℃ and air liquid ratio of 400 ： 1, after acidification and blow off, the removal rate of Cu, zinc, Fe and TCN were 99.8%, 99.6%, 97.8% and 95.4%, respectively. Solution was treated by SO2-air method after blowing off, the final concentration were Cu 0. 32 mg/L, Zn 0.40 rag/L, TCN 0.34 mg/L in the treated water. Production results showed that cyanide wastewater treated by ＂acidification＋SO2-air＂ method, achieved resource recovery of cyanide and copper, innocent treatment of cyanide and heavy metal ions. Cu, zinc and TCN in the treated water reached Grade I requirement of Integrated Wastewater Discharge Standard （GB8978-1996）, with good economic and environmental benefits.
出处
《广州化工》
CAS
2016年第16期116-119,154,共5页
GuangZhou Chemical Industry
