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石煤钒矿焙砂加压碱浸试验肖超1,肖连生1,丁文涛1(1.湖南省长沙市中南大学冶金科学与工程学院)摘 要:针对目前采用"焙烧-碱浸提钒"工艺从石煤钒矿中提取钒存在碱消耗大,浸出时间长和浸出液杂质含量高等问题,研究采用高压碱浸法浸出石煤钒矿焙砂.试验考察碱用量,液固比,浸出时间,循环浸出等因素对钒浸出率的影响.结果表明,在NaOH用量为矿重的3.5%,液固比为1.5∶1,180℃下,2h浸出,钒的浸出率达到86%,浸出液中钒硅质量浓度比为0.65,浸出液pH值约为12.1.高压碱性浸出具有钒浸出率高,杂质浸出率低等......
A rapid method for determination of acid value in transformer oil by PPy modified electrodeXIONG Ying(熊英)1, HE De-liang(何德良)1, FENG Yong(冯勇)1, ZHOU Zhou(周舟)2, CHANG Xin-yuan(常新园)1, LIU Fu-rong(刘芙蓉)1...-modified glassy carbon electrode (PPy/GC electrode) was prepared and its electrocatalytic behavior towards naphthoquinone in the presence of acid was characterized by linear sweep voltammetry (LSV). A well......
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biomass was used as reducing agent to leach cobalt from waste lithium-ion battery under the condition of sulfuric acid. The kinetics of the leaching process was researched. The results show...量0.7 g,硫酸浓度2 mol/L,温度90 ℃,反应时间2 h的条件下,电池粉中Co的浸出率达到99%以上. 关键词:废旧锂电池；燕麦秸秆；还原酸浸动力学 中图分类号:TM912.9 文献标志码:A Kinetics of acid......
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J. Cent. South Univ. (2018) 25: 2190-2198 DOI: https://doi.org/10.1007/s11771-018-3907-4 Benzohydroxamic acid to improve iron removal from potash feldspar ores CAO Zhan-fang(曹占芳)1, 2, QIU Pei(邱培)1... the benzohydroxamic acid can not only increase the recovery of iron and reduce the consumption of oleic acid collector, but also enhance the collecting performance of oleic acid at low temperature, which can......
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Adsorption of Iminodiacetic Acid Resin for Lutetium 熊春华1,姚彩萍1,王惠君2 (1.College of Food Science,Biotechnology and Environmental Engineering,Zhejiang Gongshang University,Hangzhou 310035,China;2.College of Marine Science and Technology,Zhejiang Ocean University,zhoushan zhejiang 310004,China) Abstract:The adsorption behavior and mechanism of a novel chelate resin,iminodiacetic acid resin(IDAAR......
,Kunming 650093, China) Abstract: The extraction of vanadium from black shale in Guizhou was investigated by pressure acid leaching. The effects of main factors on leach recovery were investigated in pressure field. Optimum parameters for the leaching of vanadium for one-step leaching are: reaction time of 3 h, sulfuric acid concentration of 200 g/L, leaching temperature of 180 ℃ and stirring speed......
very slowly in hydrochloric acid, sulfuric acid or nitric acid. Segregation roasting is proved to be fairly effective to reduce the molybdenum leach residue and it gives high yield of nickel extraction...J. Cent. South Univ. (2012) 19: 340-346 DOI: 10.1007/s11771-012-1010-9 Extraction of nickel from molybdenum leaching residue of metalliferous black shale by segregation roasting and acid leaching CHU......
