硝酸脱除褐煤粉煤灰中的砷

doi:10.12034/j.issn.1009-606X.217365

过程工程学报 ›› 2018, Vol. 18 ›› Issue (4): 716-721.DOI: 10.12034/j.issn.1009-606X.217365

硝酸脱除褐煤粉煤灰中的砷

韩大捷1,2，马淑花2*，王晓辉2，丁健2，郑诗礼2，罗扬2，郭奋1

1. 北京化工大学化学工程学院，北京 100029
2. 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室，北京 100190

收稿日期:2017-10-18 修回日期:2018-02-06 出版日期:2018-08-22 发布日期:2018-08-15
通讯作者: 马淑花 shma@home.ipe.ac.cn

Removal of arsenic in lignite fly ash by nitric acid

Dajie HAN1,2, Shuhua MA2*, Xiaohui WANG2, Jian DING2 , Shili ZHENG2, Yang LUO2, Fen GUO1

1. School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese
Academy of Sciences, Beijing 100190, China

Received:2017-10-18 Revised:2018-02-06 Online:2018-08-22 Published:2018-08-15
Contact: MA Shu-hua shma@home.ipe.ac.cn

摘要/Abstract

摘要： 基于砷在褐煤粉煤灰中的赋存状态，建立了酸法脱除粉煤灰中部分砷的新方法，考察了反应温度、时间、pH值等对脱砷率的影响. 结果表明，褐煤灰中的砷大多富集在煤灰表面并以砷酸钙等砷酸盐形式存在，脱砷率与pH值和反应温度成反比. 综合考虑脱砷率、溶损率等因素，确定酸法最优脱砷条件为pH=1、反应温度20℃、反应时间1 h，此时脱砷率为66.34%.

关键词: 褐煤灰, 砷酸盐, 酸法, 脱砷, pH, 温度, 时间

Abstract: Based on the occurrence of arsenic in lignite fly ash, a new acid removal method for some arsenic in fly ash was established. The effects of reaction temperature, time and pH on the arsenic removal rate were investigated. The results showed that most of arsenic in lignite fly ash was enriched on the surface of lignite fly ash and existed in the form of arsenate such as calcium arsenate. The arsenic removal rate was inversely proportional to the pH value and the reaction temperature. Considering the factors such as the arsenic removal rate and the dissolution rate, the optimum conditions for acid removal of arsenic were pH=1, reaction temperature 20℃, reaction time 1 h, the arsenic removal rate was 66.34%.

Key words: lignite fly ash, arsenate, acid method, arsenic removal, pH, temperature, time

韩大捷马淑花王晓辉丁健郑诗礼罗扬郭奋. 硝酸脱除褐煤粉煤灰中的砷[J]. 过程工程学报, 2018, 18(4): 716-721.

Dajie HAN Shuhua MA Xiaohui WANG Jian DING Shili ZHENG Yang LUO Fen GUO. Removal of arsenic in lignite fly ash by nitric acid[J]. Chin. J. Process Eng., 2018, 18(4): 716-721.

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硝酸脱除褐煤粉煤灰中的砷

Removal of arsenic in lignite fly ash by nitric acid

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