中国电力 ›› 2013, Vol. 46 ›› Issue (2): 40-45.DOI: 10.11930/j.issn.1004-9649.2013.2.40.5

• 发电 • 上一篇    下一篇

利用电厂粉煤灰酸法生产氧化铝

李瑞冰1, 张廷安1, 李景江2, 李鑫3, 吴楠3   

  1. 1. 东北大学 材料冶金学院,辽宁 沈阳 110004;
    2. 东北大学 设计研究院,辽宁 沈阳 110013;
    3. 沈阳金博新技术产业有限公司,辽宁 沈阳 110014
  • 收稿日期:2012-09-07 出版日期:2013-02-05 发布日期:2015-12-10
  • 作者简介:李瑞冰(1986—),女,辽宁沈阳人,博士研究生,从事化工冶金方面研究。E-mail: gemport@126.com

Discussion of Alumina Acid Production from Fly Ash of Power Plants

LI Rui-bing1, ZHANG Ting-an1, LI Jing-jiang2, LI Xin3, WU Nan3   

  1. 1. School of Materials & Metallurgy, Northeast University, Shenyang 110004, China;
    2. Northeast University Engineering & Research Institute Co., Ltd., Shenyang 110013, China;
    3. Shenyang Gemport New Technology Industry Co. Ltd., Shenyang 110014, China
  • Received:2012-09-07 Online:2013-02-05 Published:2015-12-10

摘要: 火电厂粉煤灰中含有大量氧化铝,将其用于生产氧化铝,既解决了氧化铝资源短缺问题,也解决了电厂粉煤灰综合利用问题,具有重要意义。综述了粉煤灰生产氧化铝的方法和目前的研究现状,分析各种方法的特点、发展趋势和可行性,并对提高粉煤灰生产氧化铝的产品质量、减少投资、降低成本等提出了建议。着重介绍1种酸法粉煤灰提取氧化铝工艺(简称GP法)。该法采用硫酸浸出、盐酸除杂和氨转化3个步骤,反应温度低,能耗低,生产成本低,所采用的闭路循环工艺没有新的固体排放物产生;但氧化铝结晶粒度、耐酸材料以及铁和其他杂质去除等方面的问题有待进一步研究。

关键词: 粉煤灰, 氧化铝, 酸法, 碱法

Abstract: Coal fly ash from power plants contains large amounts of alumina. When it is used to produce alumina, it can not only overcome the shortage of alumina resources, but also avoid environmental contamination. The methods and the status quo of the research on alumna production from fly ash are reviewed and the characteristics, trends and feasibility of these methods are analyzed. Some recommendations are given for improving the product quality, reducing the investment and lowering the cost of the alumina production. One method of acid extracting alumina from fly ash(GP method) is introduced, which consists of three steps of leaching with sulfuric acid, removing impurities with hydrochloric acid and ammonia conversion. With this method, the reaction temperature, the energy consumption and the production cost are low and there are not new solid emissions generated from the closed cycle process. The issues on the alumina crystal size, acid-resistant materials as well as iron and other impurities removal need to be further studied.

Key words: coal fly ash, alumina, acid method, soda method

中图分类号: