含铬钒渣的资源化综合利用研究

Comprehensive Utilization of Chromium-bearing Vanadium Slag

介绍了磷化工行业钒铬废渣高值化清洁利用工艺路线,并对其关键技术进行了研究,包括新型萃取体系的研发与优化、萃取机理的探讨、萃取中间层形成机理与控制方法等。在此基础上,与上下游单元无缝链接,形成了钒铬废渣全组分综合利用工艺包,并建成了1.5万t/a规模的钒铬废渣示范工程,获得了良好的经济、社会、环境效益。

Chromium-bearing vanadium slag contains vanadium,chromium and other metals which are important national strategic resources.However,they are toxic to human health,so it is significant to dispose them.Clean utilization route of chromium-bearing vanadium slag with high added value in phosphorus chemical industry is introduced in this paper.Key technologies are also researched,including research and development of new extraction system,mechanism of extraction,formation mechanism and control of the middle layer.On this basis,a seamless link between extraction and upstream and downstream units is realized,which results in a technology package of comprehensive utilization of all components in chromium-bearing vanadium slag.Furthermore,a 15 000 t/a demonstration project has been built and significant economic,social and environmental benefits have been achieved.