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Decomposition reaction kinetics of Baotou RE concentrate with concentrated sulfuric acid at low temperatureWANG Xiuyana, LIU Jiemina, LI Meib, FAN Huilia, and YANG Qishana a Department of Chemistry...="ChDivSummary" name="ChDivSummary">Baotou RE concentrate was decomposed with concentrated sulfuric acid by controlling the roasting temperature below 500°C.Thermogravimetry-differential thermal analysis(TG......
,roasting temperature,and roasting time on the acidolysis ratio of TiO2during the process of roasting high titanium slag with concentrated sulfuric acid were systematically investigated.The results show...Recovery of titania from high titanium slag by roasting method using concentrated sulfuric acidLi-Li Sui1,2,Yu-Chun Zhai2,Li-Hua Miao11. Department of Chemistry, Shenyang Medical College2. School......
某低品位复杂稀土精矿中提取稀土的研究 陈怀杰1,白炜2,梁振锋1,刘志强1 (1.广州有色金属研究院,广东广州,510651;2.广东富远稀土新材料股份有限公司,广东平远,514600) 摘要:对某低品位复杂稀土精矿采用传统的浓硫酸低温焙烧工艺,可以较好的浸出稀土和铍,浸出率分别达到95%和90%以上,但钽,铌浸出率只能达到40%左右;采用添加活化剂后,可使钽铌的浸出率提高到80%,同时稀土和铍的浸出率也分别达到97%和99%;将水浸液采用添加草酸沉淀稀土,经过煅烧后成稀土氧化物后稀土总量达到86%,将稀土氧化物采用盐酸溶解后,通过调整pH值,除去部分杂质,采用碳铵沉淀稀土,得到碳酸稀土,非稀土杂质小于2%. 关键词:稀土; 浸出; 浓硫酸焙烧; rare earth; leach; concentrated sulfuric acid calcinating; [全文内容正......
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Trans. Nonferrous Met. Soc. China 24(2014) 848-853 Reaction kinetics of roasting high-titanium slag with concentrated sulfuric acid Li-li SUI1,2, Yu-chun ZHAI1 1. School of Materials and Metallurgy... of roasting high-titanium slag with concentrated sulfuric acid was proposed to prepare titanium dioxide, and the roasting kinetics of titania was studied on the basis of roasting process. The effects......
Procedure The mineral powder and water were mixed in a certain proportion in a flask. Subsequently, the mixture was heated to 95 ℃, followed by adding concentrated sulfuric acid (95%) to the solution...; accepted 19 January 2010 Abstract: Boric acid and kieserite were prepared from low-grade ascharite by sulfuric acid method. This method results in the recovery of 71.06% and 45.03% for boric acid......
Pressure leaching of zinc silicate ore in sulfuric acid medium LI Cun-xiong(李存兄), XU Hong-sheng(徐红胜), DENG Zhi-gan(邓志敢), LI Xing-bin(李兴彬), LI Ming-tin(李旻廷), WEI Chang(魏 昶) Faculty... and the results showed that zinc exists mainly as hemimorphite and smithsonite in the sample. Sulfuric acid pressure leaching of zinc silicate ore was carried out to assess the effect of particle size, sulfuric......
Synergistic extraction of cerium from sulfuric acid medium using mixture of 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester and Di-(2-ethyl hexyl)phosphoric acid as extractant LIU Ying1,HUANG... 100088, China) Abstract:Synergistic extraction of cerium(IV) from sulfuric acid medium using mixture of 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester(HEH/EHP, HL) and Di-(2-ethyl hexyl......
