酸改性粉煤灰的制备及其降解选矿废水COD研究  

Experimental Study on Preparation of Acid Modified Fly Ash and its Degradation of COD in Mineral Processing Wastewater

作　　者：李沛伦 胡真 王成行 王晨亮 胡佛明 LiPeilun;Hu Zhen;Wang Chenghang;Wang Chenliang;Hu Foming(Guangdong Institute of Resources Comprehensive Utilization, State Key Laboratory of Rare Metal Separation and Comprehensive Utilization, Guangdong provincial key Laboratory of Development & Comprehensive Utilization of Mineral Resources, Guangzhou, Guangdong, China;Nanshan Mining Co., Ltd., Maanshan Ironand Steel Group, Maanshan, Anhui, China)

机构地区：[1]广东省资源综合利用研究所稀有金属分离与综合利用国家重点试验室广东省矿产资源开发和综合利用重点试验室,广东广州510651 [2]马钢集团南山矿业有限责任公司,安徽马鞍山243000

出　　处：《矿产综合利用》2019年第2期103-108,共6页Multipurpose Utilization of Mineral Resources

基　　金：广东省省级科技计划项目(2016B070701026);广东省省级科技计划项目(2017B040404008);广州市科技计划项目(201606241109123)

摘　　要：由于粉煤灰中含有大量的无定形相玻璃体,因此可用于选矿废水COD的降解。粉煤灰改性试验结果表明在酸改性法、碱改性法和盐改性法中,酸改性粉煤灰法效果最好。酸改性法的较佳工艺参数为:硫酸浓度1.0 mol/L、液固比3:1、酸化温度50℃、酸化时间90 min。在优化工艺下制备酸改性粉煤灰,用其降解选矿废水COD,试验条件为酸改性粉煤灰20 g/L、Fe2+1.5 mmol/L、H2O2 9.5 mmol/L、反应40 min,COD去除率可达90%以上,降解后废水符合排放标准。Because fly ash contains a large number of amorphous phase vitreous, so can be used COD degradation in mineral processing wastewater. The modified test results show that among acid modified method, alkali modification method and salt modification method of fly ash, the acid modified method of fly ash is best. The optimum parameters of acid modified method are as follows: H2 SO4 1.0 mol/L, liquid-solid ratio 3:1, acidification temperature 50 ℃ and acidification time 90 min. Acid modified fly ash was prepared under the optimized process, it is used to degrade the beneficiation wastewater COD, the test conditions for degradation of mineral processing wastewater COD are as follows: modified fly ash 20 g/L, Fe2+ 1.5 mmol/L,H2 O2 9.5 mmol/L, reaction time 40 min, experiments show that the removal rate of COD can reach more than90%;the wastewater after degradation conforms to the national environmental protection emission standard.

关 键 词：粉煤灰 选矿废水 COD 改性 降解 

分 类 号：TD989[矿业工程—选矿]