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Sulfuric acid leaching of low-grade refractory tantalum–niobium and associated rare earths minerals in Panxi area of ChinaBiao Wu,He Shang,Jian-Kang WenNational Engineering Laboratory... in this study was classified as refractory mineral of low-grade which was mainly composed of fergusonite, polycrase, ilmenorutile, and bastnasite. Most of niobium and rare earth metals were disseminated......
Rare Earths, Niobium and Tantalum Minerals in Bayan Obo Ore Deposit and Discussion on Their Genesis 张培善1,宋仁奎1,陶克捷1,杨学明1,杨主明1 (1.Institute of Geology and Geophysics, Chinese Academy of Sciences.... It is obviously that some minerals are strata minerals and some are post-strata minerals. The rare earths, niobium and tantalum minerals are exactly the post-strata minerals. In these minerals......
minerals. LI et al [15] investigated the sulfidation roasting of a low-grade zinc oxide ore containing 7.57% Zn with elemental sulfur and the sulfidation extent of Zn was 95%. A flotation concentrate... that the main zinc mineral was smithsonite and the gangue was mainly quartz and calcite. The lead bearing minerals were not detected due to its low content. According to Table 2 and other similar......
property analysis of niobium ethoxide have not been undertaken so far. In the present work, Nb(OEt)5 was directly prepared with niobium plate of industrial grade as a sacrificial anode in absolute alcohol... cm. The niobium plate was made from niobium powders of metallurgical grade with self-resistance sintering, electron bombardment and rolling treatment. The chemical composition of the niobium plate......
. Table 1 Chemical compositions of low-grade diasporic bauxite (mass fraction, %) It can be seen from mineral compositions by XRD analysis given in Table 2 that, the aluminous minerals in the ore include much diaspore, little boehmite and gibbsite, and the silicate gangue minerals are constituted by kaolinite, illite chlorite and quartz. Table 2 Mineral compositions of low-grade diasporic bauxite......
and zircon, where they could not be easily liberated. Thus, the ores are classified as low-grade, micro-fine, and refractory tantalum–niobium ores. Based on this consideration, the process of classification..., columbite, tantalum–niobite, and microlite, and the gangue minerals associated with tantalum–niobium minerals mainly include quartz, kaolinite, illite, feldspar, and mica among others. The minerals......
Dry Separation of Iron Minerals from Low-Grade Coal-series Kaolin黄腾1,雷绍民1,LIU Mochou1,JI Mengjiao1,LIU Yuanyuan1,YIN Xudong2,PENG Yongjun1,31. School of Resources and Environmental, Wuhan University of Technology2. Yichang Huilong Science and Technology Co., Ltd.3. The University of Queensland摘 要:Dry separation of iron mineral from low-grade coal-series......
Comprehensive recovery of gold and base-metal sulfide minerals from a low-grade refractory oreWen-juan Li1,2,Shuang Liu1,Yong-sheng Song1,Jian-kang Wen1,Gui-ying Zhou1,Yong Chen11. National...="ChDivSummary" name="ChDivSummary">The comprehensive recovery of small amounts of valuable minerals such as gold and base-metal sulfide minerals from a low-grade refractory ore was investigated......
Catalytic effect of activated carbon on bioleaching of low-grade primary copper sulfide ores ZHANG Wei-min(张卫民)1, GU Shi-fei(谷士飞)2 1. School of Civil and Environmental Engineering, East China... June 2007 ______________________________________________________________ Abstract: The catalytic effect of activated carbon on the bioleaching of low-grade primary copper sulfide ores using mixture......
J. Cent. South Univ. (2012) 19: 77-84 DOI: 10.1007/s11771-012-0975-8 Leaching kinetics of low-grade copper ore with high-alkality gangues in ammonia-ammonium sulphate solution LIU Zhi-xiong(刘志雄)1, 2... Engineering, Jishou University, Jishou 416000, China ? Central South University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: The leaching kinetics of low-grade copper ore with high-alkality......
