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, PALENCIA I. Kinetics improvement of high-grade sulfides bioleaching by effects separation [J]. TEMS Microbiol Reviews, 1993, 11: 129-138. [14] HARVEY P I, CRUNDWELL F K. Growth of Thiobacillus...; (4) At the iron oxidation step, a high density of cells of bioleaching bacteria is essential for rapid oxidation. For this reason, many studies of T. ferrooxidans have been carried......
with the growing demand for stainless steel and the declining of sulphide ores and high-grade nickeliferous laterite ores[1-4]. Nickeliferous laterite ore deposits are formed by the chemical weathering... laterite ores. First of all, silicon and magnesium were removed from lateritic ore by high concentration sodium hydroxide leaching and carbonation respectively, so as to enrich nickel. Then the method......
]. 北京: 冶金工业出版社, 1998. 335-347. Acuna C, Zaniga J. Investigation on blowing high-grade copper matte with lime flux[A]. Proceedings of 1995 Copper International Conference[C]. Beijing: Metallurgical... in steelmaking in view of the tramp element problem[J]. Metall, 1998, 52(6): 374-383. [3]Marique C. Scrap recycling and production of high quality steel grades in Europe[J]. La Revue de Metallugie-CIT......
Sinica, 2002, 38(4): 400-402. [15]邓国珠, 王雪飞. 用攀枝花钛精矿制取高品位富钛料的途径[J]. 钢铁钒钛, 2002, 13(4): 14-17. DENG Guo-zhu, WANG Xue-fei. Methods of preparing high-grade titania feedstock from Panzhihua titanium... and low grade titania feedstock by activated roasting-acidic leaching GUO Yu-feng, XIAO Chun-mei, JIANG Tao, QIU Guan-zhou, HUANG Zhu-cheng, DONG Hai-gang (School of Resources Processing......
[J]. 湖南有色金属, 2005(2): 14-16. CHEN Yong-hai, TAN wen-qing, HUANG Hong-jun. Development of silica-removal study on leaching high-grade silico zinc oxide ore with sulfuric acid[J]. Hunan Nonferrous... of refractory high silica zinc oxide ore by mechanical activation ZHAO Zhong-wei1, 2, LONG Shuang1, 2, CHEN Ai-liang1, 2, HUO Guang-sheng1, 2, JIA Xi-jun1, 2, LI Hong-gui1, 2, YAN Hai-quan3 (1. School......
for high-grade niobium-tantalum ores[10]. Although the resources of niobium-tantalum ores are abundant in China, most of them are in low-grade and difficult to decompose by hydrofluoric acid[11... transformed into insoluble potassium tantalate at low temperature (350 °C) and transformed into soluble potassium tantalate at high temperature (450 °C). The insoluble potassium tantalate......
150 million tons of high-sulfur bauxite, more than 57.2% of which is of high-grade[1]. This kind of bauxite is suitable for the Bayer process, but the problem of desulphurizing should be solved before.... Synthesis of barium aluminate-desulphrizing reagent for Bayer solution from high grade bauxite containing sulfur [J]. Nonferrous Metals, 2006, 58(3): 66-69. (in Chinese) [10] WROE R, ROWLEY A T. Evidence......
, ZHANG Yi-min, WANG Chang-an, et al. Obtaining high-grade MgO from low-grade magnesite[J]. Journal of Wuhan University of Science and Technology, 2006, 29
concentration and magnetic separation [5], are also used to separate cassiterite from associated gangue minerals. However, recovery and concentrate grade by these methods are far from satisfaction [6]. Due to the reducing of high-grade ore in the world and increasing loss of mineral values during processing, it has become imperative to develop efficient and cost-effective processing routes to recover......
of the production cost. In 2012, the market price of V2O5 decreased to about $10000 per ton [8], close to the production cost. As a result, only relatively high-grade ore (>0.5% V2O5) has economic value... achieved around pH 2. It was known that strong acidity would result in high cost of reagents and corrosion to equipments. Therefore, the pulp pH was recommended as 3, with which the grade and recovery rate......
