高岭土制备聚合氯化铝及处理洗煤废水的研究  

Study on the Preparation of Poly Aluminum Chloride from Kaolin and the Treatment of Coal Washing Waste Water

作　　者：孔德顺 王鲁凤[1] 蒋荣立 Kong Deshun;Wang Lufeng;Jiang Rongli(School of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui,Guizhou 553004;School of Chemical Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221016;Guizhou Key Laboratory of Coal Clean Utilization,Liupanshui,Guizhou 553004)

机构地区：[1]六盘水师范学院化学与材料工程学院,贵州六盘水553004 [2]中国矿业大学化工学院,江苏徐州221016 [3]贵州省煤炭洁净利用重点实验室,贵州六盘水553004

出　　处：《非金属矿》2020年第4期80-83,共4页Non-Metallic Mines

基　　金：贵州省科技厅科学技术基金项目(黔科合基础[2018]1142);贵州省教育厅创新群体重大研究项目(黔教合KY字[2017]054);贵州省煤炭洁净利用重点实验室(黔科合平台人才[2020]2001);六盘水市科技计划项目(52020-2018-04-01)。

摘　　要：利用煤系高岭土酸浸液,采用水浴加热的方法,制备了聚合氯化铝(PAC),优化工艺条件为:Al3+浓度为0.50 mol/L,pH值为0.50,聚合温度为70℃、聚合时间为3.0 h,室温熟化24 h。采用制备的PAC处理洗煤废水,获得了处理800 mL洗煤废水的优化条件为:pH值为7.0,质量分数1%的PAC溶液用量为5 mL(62.5 g/m^3废水),沉降时间为40 min。结果表明,采用煤系高岭土酸浸液制备PAC,并将PAC用于处理洗煤废水可行,洗煤废水去浊率达98%以上。In order to utilize the acid leaching solution of coal series kaolin and treat the coal washing waste water, poly aluminum chloride(PAC) was prepared by water bath heating method, and the optimized process conditions were obtained as follows: Al3+ concentration was 0.50 mol/L, pH value was 0.50, polymerization temperature was 70 ℃, polymerization time was 3.0 h, room temperature ripening for 24 h. The optimum conditions for the treatment of 800 mL coal washing waste water were obtained: pH value of 7.0, dosage of 1% PAC solution was 5 mL(62.5 g/m^3), settling time was 40 min. The results show that preparing PAC from acid leaching solution of coal gangue and using it to treat coal washing waste water are feasible, the removing turbidity is more than 98%.

关 键 词：高岭土 聚合氯化铝 混凝 洗煤废水 

分 类 号：X752[环境科学与工程—环境工程]