二次铝灰制备聚合氯化铝试验研究

金属矿山 ›› 2021, Vol. 50 ›› Issue (07): 206-210.

二次铝灰制备聚合氯化铝试验研究

石家力¹ 黄自力¹ 秦庆伟¹ 袁晨光¹陈精智² 周毅²

1. 武汉科技大学资源与环境工程学院，湖北武汉 430081；2. 湖北新金洋资源股份公司，湖北襄阳 441700

出版日期:2021-07-15 发布日期:2021-08-06
基金资助:
2017年度“隆中人才支持计划”项目（编号：襄组通〔2018〕21号）

Experiment Study on the Preparation of Polyaluminum Chloride with Secondary Aluminum Dross

SHI Jiali¹ HUANG Zili¹ QIN Qingwei¹ YUAN Chenguang¹ CHEN Jingzhi² ZHOU Yi²

1. College of Resources and Environmental Engineering， Wuhan University of Science and Technology， Wuhan 430081，China； 2. Hubei Xinjinyang Resources Co.， Ltd.， Xiangyang 441700，China

Online:2021-07-15 Published:2021-08-06

摘要/Abstract

摘要： 次铝灰是再生铝工业生产中的主要副产物之一，成分复杂，含盐量高。襄阳某再生铝厂二次铝灰产量巨大，长期堆存对环境构成一定的威胁。为减轻二次铝灰对环境的污染，实现二次铝灰的高值化利用，采用水洗—酸浸—聚合熟化工艺制备聚合氯化铝。试验考察了聚合温度、聚合时间、聚合pH值等条件对聚合氯化铝中氧化铝含量和盐基度的影响，并对优化条件下制备的聚合氯化铝进行XRD、扫描电镜及红外光谱表征分析。结果表明：水洗渣酸浸液在聚合温度70 ℃、聚合时间5 h、聚合pH值3.0等优化条件下，制备出产品的氧化铝含量、盐基度分别为9.09%和46.30%，各项指标均达到国家质量标准；XRD和扫描电镜分析表明，合成的聚合氯化铝中金属杂质含量较低，氯化钠含量较高；红外光谱分析表明，聚合氯化铝分子中含有羟基结构和聚合态铝。

关键词: 二次铝灰, 聚合熟化, 聚合氯化铝, 产品表征

Abstract: Secondary aluminum dross is a main by-product of aluminum industrial production with complex composition and high salt content. The output of secondary aluminum dross in a secondary aluminum plant in Xiangyang is huge， and long-term storage poses a certain threat to the environment. In order to reduce the pollution to the environment and realize the high- value utilization of secondary aluminum dross，polyaluminum chloride was prepared by process of water washing pretreatment， hydrochloric acid leaching and polymerization maturing.The effects of polymerization temperature， polymerization time， polymerization pH value on the alumina contents and basicity of polyaluminum chloride were investigated， and the polyaluminum chloride prepared under optimized conditions was characterized by XRD， scanning electron microscopy and infrared spectrum. The results showed that the production prepared under the optimized conditions of polymerization temperature of 70 ℃， polymerization time of 5 h and polymerization pH of 3.0 displayed alumina contents and basicity of 9.09% and 46.30%， respectively.All indicators of the product were up to the national quality standards. The XRD and scanning electron microscopy analysis showed that the contents of metal impurities in the synthesized polyaluminum chloride was relatively low， and the main substance was sodium chloride. The infrared spectrum indicated that hydroxyl and polymeric aluminum were presented in the polyaluminum chloride molecule.

Key words: secondary aluminum dross, polymerization maturing, polyaluminum chloride, production characteristic

石家力黄自力秦庆伟袁晨光陈精智周毅. 二次铝灰制备聚合氯化铝试验研究[J]. 金属矿山, 2021, 50(07): 206-210.

SHI Jiali HUANG Zili QIN Qingwei YUAN Chenguang CHEN Jingzhi ZHOU Yi. Experiment Study on the Preparation of Polyaluminum Chloride with Secondary Aluminum Dross[J]. Metal Mine, 2021, 50(07): 206-210.