摘要
对某黄金冶炼企业中和后的酸性废水采用二氧化碳降低废水硬度,当中和p H11、二氧化碳反应时间为1.5h,废水总硬度降到330mg/L,降低了68.8%。首次在黄金冶炼行业采用液体二氧化碳去除钙镁工艺,经两年的工业实践,工艺运行稳定,废水硬度小于350mg/L,废水循环利用率达100%。
Carbon dioxide was used to reduce neutralized acid waste water hardness in gold smelting enterprises,when the neutralization p H is 11,reaction time of carbon dioxide is 1.5 h,the total hardness of waste water is re-duced to 330 mg/L with the a reducing rate of 68.8%. It's the first time for gold smelting industry to use liquidcarbon dioxide in removing calcium and magnesium. After two years of industrial application,the technology isstabilizing,the waste water hardness is less than 350 mg/L,the recycled utilization rate of waste water is 100%.
出处
《河南科技》
2015年第07X期110-113,共4页
Henan Science and Technology
基金
河南省科技计划项目(142102310013)
关键词
黄金冶炼
酸性废水
循环利用
液体二氧化碳
除钙镁
gold smelting
acid waste water
recycled utilization
liquid carbon dioxide
calcium and magnesium removal
