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of vanadium 3.3 Effect of helper leaching agent Fig.3 shows the effect of the helper leaching agent on the extraction of vanadium. It is clearly found that the extraction rate of vanadium with the helper leaching agent R is the highest, suggesting that the helper leaching agent R significantly improves the extraction rate of vanadium. The extraction rate of the vanadium with the helper leaching......
and chromium Compared with other sulfuric acid concentrations, 40 wt% sulfuric acid was the most effective for leaching vanadium and chromium. At lower sulfuric acid concentrations, the rate at which... J. Cent. South Univ. (2018) 25: 1317-1325 DOI: https://doi.org/10.1007/s11771-018-3828-2 Leaching of vanadium and chromium from converter vanadium slag intensified with surface wettability YANG Qi......
on the vanadium leaching percent, such as reagent concentration, ratio of liquid to solid, temperature, leaching time, mineral granularity, were investigated. The results show that the vanadium leaching rate... acid concentration of 30 g/L, sodium hypochlorite dosage of 1.5%, ratio of liquid to solid of 6:1, stirring velocity of 500 r/min at 90 ℃ for 6 h, the leaching rate of vanadium is above 85%. Key......
researchers found that the roasting treatment exerted significant influence on the leaching process. Various roasting processes were investigated in order to get high vanadium leaching rate... Acid leaching of vanadium from roasted residue of stone coal ZHU Yang-ge(朱阳戈), ZHANG Guo-fan(张国范), FENG Qi-ming(冯其明), LU Yi-ping(卢毅屏), OU Le-ming(欧乐明), HUANG Si-jie(黄思捷) School of Resources......
of 1.2:1, the granularity less than 0.074 mm, p(O2) of 1.2 MPa and additive consumption of 3%-5%, vanadium leaching rate was over 92% by the method of two-step reverse flow oxygen pressurized acid... Extracting vanadium from stone-coal by oxygen pressure acid leaching and solvent extraction DENG Zhi-gan(邓志敢), WEI Chang(魏 昶), FAN Gang(樊 刚), LI Min-ting(李旻廷), LI Cun-xiong(李存兄), LI......
低品位钒矿直接酸浸提钒工艺研究李欣1,王毅1,朱军2(1.西安建筑科技大学 冶金工程学院,陕西西安 7100552.西安建筑科技大学冶金工程学院,西安710055)摘 要:针对提钒工艺现状存在问题,根据物理选矿结果,确定了抛尾富集物酸法直接浸出钒的工艺方法.通过浸出试验,对酸浸提钒阶段各影响因素进行优化.确定了适宜的磨矿粒度,酸度,浸出温度,液固比和浸出时间等工艺条件,钒的浸出率可达到90%以上.关键词:钒矿； 物理选矿； 直接酸浸； 钒浸出率......
phases in the vanadium slag were completely decomposed at 500 and 800°C, respectively. Vanadium-rich phases were formed at above 850°C. The leaching rate of vanadium reached above 90% under the optimum... 400044, China摘 要:The extraction of vanadium from high calcium vanadium slag was attempted by direct roasting and soda leaching. The oxidation process......
of 50 min,a liquid-solid ratio of 10:1 mL·g-1,and oxygen pressure at 0.2 MPa,the leaching rate of vanadium reaches 97.69%.关键词:... friendly manner,this study focuses on the process of leaching vanadium from vanadium slag by high pressure oxidative acid leaching.Characterizations of the raw slag,mineralogy transformation......
Roasting and leaching behaviors of vanadium and chromium in calcification roasting–acid leaching of high-chromium vanadium slagJing Wen1,Tao Jiang1,2,Mi Zhou1,2,Hui-yang Gao1,Jia-yi Liu1,Xiang-xin...–acid leaching of high-chromium vanadium slag(HCVS)was conducted to elucidate the roasting and leaching behaviors of vanadium and chromium.The effects of the purity of Ca O,molar ratio between Ca O......
. The leaching rate of vanadium under microwave irradiation is increased by 8%–15% when 5wt% Ca F2 is added; by contrast,in the absence of Ca F2,the leaching rate is almost unaffected compared...="ChDivSummary">The effect and mechanism of microwave irradiation on vanadium leaching were studied via a comparison between microwave heating and conventional heating. The results show a synergistic effect......
