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from the coal gangue, an integrated process is proposed. The process consists of three steps: 1) concentrating alumina from the coal gangue via activation roasting followed by alkali leaching of SiO2... from coal gangue with high pyrite content by a roasting-soaking-neutralization process. High Al-containing coal gangue can be used to produce aluminum chloride, aluminum sulfate or alumina [13-14......
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......
to an oxidizing roast to transform vanadium into its soluble form. The roasted cinder product is then leached with water or weak sulfuric acid. Vanadium is deposited from the solution, either in the form of metavanadate or ammonium poly vanadate, in the presence of ammonium sulfate or as commercially pure vanadium pentoxide upon hydrolysis [5,6]. This process is costly and complicated, with a low vanadium......
Catalytic spectrophotometric determination of trace vanadium in fly ash and coal gangue by Triton X-100 enhancing effectXIA Changbin and HUANG NiandongInstitute of Environmental Engineering &...%-3.7%. Combined with ion-exchange resin, the method has been applied to the determination of trace vanadium in fly ash and coal gangue with satisfactory results.关键词:......
.最后,总结了石煤提钒的主要焙烧设备,其中流化床炉具有较好的发展前景. 关键词:石煤; 钒; 焙烧; 最佳焙烧条件; 流化床; stone coal; vanadium; roasting; optimum condition; circulating fluidized bed; [全文内容正在添加中] ......
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stone coal are researched and developed, and the techniques generally include roasting, acid leaching, ion purification, precipitation and calcinations [2-5]. However, owing to the low grade of vanadium..., HU Yang-jia, BAO Shen-xu. Vanadium emission during roasting of vanadium-bearing stone coal in chlorine [J]. Minerals Engineering, 2012, 30(4): 95-98. [4] LONG Si-si, ZHANG Guo-fan, FENG Qi-ming, OU......
Facile Synthesis,Characterization of Flower-Like Vanadium Pentoxide Powders and Their Photocatalytic BehaviorYao Li1,Jian-Lei Kuang1,Yi Lu2,Wen-Bin Cao1,31. Department of Inorganic Nonmetallic...="ChDivSummary" name="ChDivSummary">In this paper, V2O5 sol was firstly prepared using vanadyl sulfate as a vanadium source by modified sol-gel method at room temperature. Then flower-like V2O5 powders were......
separation.Alkaline metal salts were usually added to enhance reduction of laterite ores.The feasibility of co-reduction roasting of a saprolitic laterite ore and red mud was investigated.Results show that the red...Feasibility of co-reduction roasting of a saprolitic laterite ore and waste red mudXiao-ping Wang,Ti-chang Sun,Jue Kou,Zhao-chun Li,Yu TianSchool of Civil and Resource Engineering, University......
separation[J]. Transactions of Nonferrous Metals Society of China, 2015, 25(4): 1325-1333. [3] LIU Chun, ZHANG Yi-min, BAO Shen-xu. Vanadium recovery from stone coal through roasting and flotation[J...): 90-92. BAO Shen-xu, ZHANG Yi-min, HU Yang-jia, LIU Tao. Changes of mineralogical phase and vanadium valences and their effect on vanadium leaching in process of roasting stone coal[J]. Mining......
