摘要
以煤矸石为原料制备聚合氯化铝是煤矸石综合利用的重要方式之一,考察了聚合温度、聚合时间、Al3+浓度和铝酸钙粉用量等对聚合氯化铝产品指标的影响。结果表明,当煤矸石固体质量与盐酸溶液体积之比(固液比)达到1∶3.5时,煤矸石中氧化铝的溶出率近80%;该固液比下,聚合条件为:铝离子浓度1.5 mol/L,铝酸钙粉用量150 g/L,80℃下聚合120 min,得到的聚合氯化铝产品中Al2O3含量10.3%,盐基度65.6%,符合HG/T 2677—2009中的Ⅰ类产品指标。
The preparation of the polyaluminum chloride floceulant （PAC） from coal gangue is one of the important utilization ways of coal gangue. The effects of polymerization temperature,polymerization time, A1^3＋ concentration and calcium aluminate powder dosage on the index of polyaluminum chloride products were investigated by single factor experimental. The results show that the optimal condition of polymerization are the ratio of the mass of coal gangue （g） to the volume of hydrochloric solution （ml） 1 ： 3.5 and the polymerization conditions 80 ℃, 120 min, 1.5 mol/L A1^3＋ in the acid leaching solution ,and 150 g/L calcium aluminate powder in the acid leaching solution. The asprepared polyaluminium chloride contains 10.3 % A12 03 with a basicity of 65.6%, which is in accordance with Class I of the HG/ T 2677--2009.
作者
吴海滨
薛芳斌
郭彦霞
程芳琴
杨凤玲
WU Haibin;XUE Fangbin;GUO Yanxia;CHENG Fangqin;YANG Fengling(Shanxi Rui En Ze Technology Co.,Ltd.,Taiyuan 030006,China;State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources,Institute of Resources and Environmental Engineering,Shanxi University,Taiyuan 030006,China)
出处
《洁净煤技术》
CAS
2018年第4期141-145,共5页
Clean Coal Technology
基金
国家重点研发计划资助项目(2017YFB0603102)
山西省煤基低碳重大专项资助项目(MC2016-05)
关键词
煤矸石
聚合氯化铝
氧化铝
铝酸钙粉
coal gangue
polyaluminum chloride flocculants
alumina
calcium aluminate powder
