The world's first sub-molten salt clean vanadium extraction production line jointly developed by HGZC and the Chinese Academy of Sciences, which was put into operation in June last year, has now penetrated the entire line of HGZC, reaching more than 80% of the designed production capacity. Li Lanjie, director of the vanadium-titanium technology research institute of HGZC Group, said, "the whole production process has no waste water, no waste gas, no waste residue, reduces production costs by 10%, and also improves the vanadium recovery rate by more than 10% and the chromium recovery rate by more than 80%. . "
Vanadium is mainly used in the manufacture of high-speed cutting steel and other alloy steels and catalysts. Adding a few percent of vanadium to the steel can greatly increase the elasticity and strength of the steel, and it has excellent anti-wear and anti-burst properties. It is resistant to high temperatures and extreme cold. No wonder in automotive, aviation, railway, electronic technology, Vanadium traces can be seen everywhere in the defense industry and other sectors. In addition, vanadium oxide has become one of the best catalysts in the chemical industry, known as "chemical bread".
Vanadium resources are mainly found in vanadium-titanium magnetite. China is concentrated in Panzhihua City in Sichuan and Chengde City in Hebei. With the advantage of resources, HGZC has carried out innovation and research on vanadium extraction technology very early. However, the traditional sodiumization roasting process has worldwide problems such as large amount of "three wastes" and high cost, which has become a bottleneck restricting the green development of the vanadium industry.
Du Hao, Ph.D., Institute of Process Engineering, Chinese Academy of Sciences, recalled, "We first conducted a two-year pilot test at HGZC and then returned to the Chinese Academy of Sciences to conduct a large number of tests and continuously optimize the production scheme." Until March 2016 The sub-molten salt clean vanadium extraction production line was started in HGZC. Li Lanjie said, "At the beginning of operation, the quality of the product was unstable, and there was also a problem of insufficient linkage from the reaction to the recovery. After more than a year of process improvement, the product quality has now reached the design standard, achieving full-line penetration and meeting the production of high-purity powders. Vanadium requirements. "