摘要
赤泥是铝工业中的最大量固废,实现"三化"利用的前提是需要有效地去除赤泥中大量存在的碱,本文主要针对近年来发展的各种赤泥脱碱技术进行梳理。从成本角度考虑,石灰脱碱和盐类脱碱的方法是未来最有可能实现工业化的两种方法。石灰价格便宜,通过控制影响因素可以获得较好的脱碱效果;盐类脱碱的效果非常明显,而且很多工业废盐可以利用。另外,如果将石灰脱碱和盐类脱碱结合,选择合适的盐类(最有可能的是含镁盐类),则有可能实现对赤泥更好的脱碱效果。
Red mud ranks the most solid waste in the alumina industry.The premise of realizing the harmlessness,reduction and resource utilization for red mud is effectively removing the large amount of alkali in red mud,and this paper mainly sorts out most kinds of dealkalization technologies for red mud development in recent years.From a cost perspective,two methods containing lime dealkalization and salt dealkalization are possible to be industrialized in the future.The price of lime is cheap,and the better efficiency of dealkalization can be obtained by controlling the influencing factors;the efficiency of salt dealkalization is very high and many industrial waste salts may be utilized.In addition,if the lime dealkalization and salt dealkalization are combined and suitable salts are selected(magnesium-containing salts may be the best candidate),it is possible to achieve a better dealkalization efficiency of red mud.
作者
张毅
莫皓然
ZHANG Yi;MO Hao-ran
出处
《中国有色冶金》
CAS
2019年第2期26-29,33,共5页
China Nonferrous Metallurgy
基金
广西自然科学基金重大项目资助(No.2016GXNSFEA380002)
关键词
赤泥
脱碱技术
石灰脱碱
盐类脱碱
red mud
dealkalization technologies
lime dealkalization
salt dealkalization
