Firstly,the physical characteristics of vanadium-containing steel slag are analyzed,and on this basis,the research progress of further vanadium extraction from vanadium-containing steel slag is discussed,among which:roasting-leaching is a type of vanadium extraction process with high maturity at present,but due to the problems of its great energy consumption,low vanadium leaching rate,and serious pollution,it has gradually become unsuitable;direct vanadium extraction by leaching (acid leaching is the main one) removes the roasting process,which simplifies the process,saves energy consumption,and avoids the need for industrialization.Direct leaching vanadium extraction (acid leaching-based),eliminating the roasting process,to a certain extent,simplify the process,saving energy consumption,avoiding flue gas pollution,and can obtain a high vanadium leaching rate,is the direction of vanadium extraction,but the conventional direct acid leaching,due to the vanadium-containing slag in the high content of calcium and iron,resulting in high acid consumption,acid leach solution difficult to purify the enrichment of the problem has not yet been resolved,can not be popularized and applied;other emerging technologies are applied to extract vanadium from vanadium-containing steel slag,but the processes are not yet mature and need further improvement and development.Finally,for the “high calcium”,“high iron” problem,independently developed a vanadium containing steel slag vanadium extraction of a new process,that is,“Calcium purification and recovery-selective acid leaching vanadium “It provides reference for the key breakthrough and leapfrog development of vanadium extraction from vanadium-containing steel slag.
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