Technology Progress in Comprehensive Utilization of Converter Vanadium Slag
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摘要: 转炉钒渣是直接提钒的原料,其中包含有价值的金属,例如钒、铬、钛和铁等。目前转炉钒渣的提取工艺主要是钠化焙烧—水浸和钙化焙烧—酸浸。钠化焙烧—水浸过程将产生大量有害气体,污染环境。钙化焙烧—酸浸过程虽然没有产生废气,但酸浸溶液中杂质很多,影响了钒产品的质量。基于转炉钒渣综合利用的必要性,介绍了转炉钒渣提钒的最新技术,如:无焙烧钒渣加压酸浸、熔融钒渣直接氧化钠化/钙化提钒、硫酸铵熔融法酸浸提钒、转炉钒渣机械活化酸浸提钒、电场强化酸浸提钒等,讨论了各自工艺的优缺点,并提出了转炉钒渣综合利用的一些建议。Abstract: Converter vanadium slag is a raw material for direct extraction of vanadium,which contains valuable metals such as vanadium,chromium,titanium and iron.At present,the extraction process of converter vanadium slag is mainly divided into sodium roasting-water leaching and calcification roasting-acid leaching.The process of sodium roasting-water leaching will produce a lot of harmful gases which will pollute the environment.Although no waste gas is generated during the process of calcification roasting-acid leaching,there are many impurities in the acid leaching solution,which affects the quality of vanadium products.Based on the necessity of comprehensive utilization of converter vanadium slag,this paper introduces the latest new technology for vanadium extraction from converter vanadium slag,discusses the advantages and disadvantages of the new process,and proposes some suggestions of comprehensive utilization of converter vanadium slag.
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