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precipitation. Key words: vanadium; vanadium slag; roasting; acid leaching; recovery 1 Introduction Vanadium is widely used in various industries, including steel, chemistry, aerospace, and medicine, due to its...]. The steps in the process of extracting vanadium from vanadium slag include roasting, leaching, purification of the aqueous solution, and precipitation [7,8], of which roasting plays the most crucial......
in separation of vanadium from leaching solution, the vanadium was finally precipitated as ammonium vanadate by ammonia or ammonium. Because vanadium in stripping solution was V4+, the precipitation... these conditions, vanadium in stripping solution was gradually crystallized into ammonium vanadate, and the precipitation recovery of vanadium was 99.2%. After solid liquid separation "red cake" of ammonium......
Preparation of Fine Spherical Particle Sized Ceria by Precipitation Method with Ammonium Bicarbonate Cui Dali1,Zhang Guocheng1,Zhu Zhaowu1,Zhang Shunli1,Long Zhiqi1 (1.Advanced Materials Co. Ltd., Beijing General Research Institute of Nonferrous Metals, Beijing 100088, China) Abstract:Fine spherical particle sized ceria (CeO2) was prepared by homogeneous precipitation method with ammonium......
-water leaching-precipitation separation [3, 4]. However, multiple factors, involving the partial oxidation of vanadium minerals and the insufficient water-leaching efficiency, contribute to low recovery... in the infusion solution with respect to the original input quantity. Vanadium and iron in the lixivium were estimated by titrimetry of ammonium ferrous sulfate and phenanthroline spectrophotometric......
的机理,认为微波焙烧可破坏含钒云母的晶体结构,是提高V2O5浸出率的主要原因. 关键词:石煤；五氧化二钒；微波焙烧；酸浸工艺 中图分类号:TQ522.59 文献标志码:A Microwave roasting-acidic leaching technique for extraction of vanadium from... coal, the microwave roasting-acidic leaching technique for extraction of vanadium from stone coal was developed, and the effects of H2SO4 dosage and leaching time on vanadium extraction were......
, JI Cheng-gang. Removal of vanadium from ammonium molybdate solution by chemical precipitation and ion exchange[J]. Chinese Journal of Rare Metals, 2012, 36(3): 466-471. (编辑 李艳红) 基金项目:国家自然科学基金...%, respectively. Compared with using ferric salts, hydrous ferric oxide has better vanadium-removal effect. The effect of ferric salt on the V removal from molybdate solution was also investigated. The results......
度可达99%以上; 低浓度含钒溶液沉钒时, 按其生成APV质量的1/200加入晶种破坏溶液过饱和度, 可将沉钒时间缩短25%; 得到的沉淀物经液固比为40∶ 1的自来水洗涤, 能将APV中Na~+, K~+含量降至0.24%, 且钒损失率仅为0.2%. 关键词:酸性铵盐沉钒; 石煤; 多聚钒酸铵; acidic precipitation of vanadate-leaching solution; stone coal; ammonium polyvanadate; [全文内容正在添加中] ......
with the theoretical calculation. Key words: ammonium paratungstate; silicon removal; magnesium salt precipitation; solution purification 1 Introduction The tungsten is an important metal in many industrial... of MgSiO3. Therefore, magnesium salt precipitation operation used for silicate removal is placed at the end of ammonia distillation stage, where most of the ammonium carbonate in the solution has been......
Preparation of spiro-type quaternary ammonium salt via economical and efficient synthetic route as electrolyte for electric double-layer capacitorZHOU Hong-ming(周宏明)1, 2, SUN Wen-jiao(孙文佼)1, LI Jian...)Abstract:A spiro-type quaternary ammonium salt, spiro-(1,1′)-bipyrrolidinium tetrafluoroborate (SBP-BF4) was successfully prepared by an economical and efficient three-step process comprising......
