Mineralogical characterization and comprehensive utilization of micro-fine tantalum–niobium ores from Songzi
来源期刊：Rare Metals2015年第4期
论文作者：Zhi-Tao Yuan Ji-Wei Lu Hui-Fang Wu Jiong-Tian Liu
文章页码：282 - 290
摘 要：The mineralogical characteristics of tantalum–niobium ores from Songzi were investigated using mineral liberation analyzer（MLA） and chemical analysis. In particular, the chemical composition, phase composition,particle size, and dissemination characteristics of the ores were studied in detail. Results show that Ta2O5 and Nb2O5have grades of 0.013 % and 0.011 %, respectively.The main valuable minerals in the ores are tantalite, 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 are embedded in a complex manner. Tantalum–niobium minerals with most particle sizes of-0.040 mm are disseminated in minerals, such as mica, illite, quartz, and partially intergrown with topaz 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–gravity concentration–magnetic separation–middlings regrinding and gravity concentration are finally determined and satisfactory indices are obtained.Two rough concentrates are produced: Concentrate I has Ta2O5 and Nb2O5grades of 7.0292 % and 3.546 %,respectively, as well as recovery of 49.42 % and 35.46 %.By comparison, Concentrate II has Ta2O5 and Nb2O5grades of 7.0292 % and 3.546 %, respectively, as well as recovery of 49.42 % and 35.46 %.
Zhi-Tao Yuan1，Ji-Wei Lu1，Hui-Fang Wu2，Jiong-Tian Liu1
1. School of Resources & Civil Engineering, Northeastern University2. Department of Design, Northeastern University Engineering and Research Institute Co. Ltd.
摘 要：The mineralogical characteristics of tantalum–niobium ores from Songzi were investigated using mineral liberation analyzer（MLA） and chemical analysis. In particular, the chemical composition, phase composition,particle size, and dissemination characteristics of the ores were studied in detail. Results show that Ta2O5 and Nb2O5have grades of 0.013 % and 0.011 %, respectively.The main valuable minerals in the ores are tantalite, 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 are embedded in a complex manner. Tantalum–niobium minerals with most particle sizes of-0.040 mm are disseminated in minerals, such as mica, illite, quartz, and partially intergrown with topaz 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–gravity concentration–magnetic separation–middlings regrinding and gravity concentration are finally determined and satisfactory indices are obtained.Two rough concentrates are produced: Concentrate I has Ta2O5 and Nb2O5grades of 7.0292 % and 3.546 %,respectively, as well as recovery of 49.42 % and 35.46 %.By comparison, Concentrate II has Ta2O5 and Nb2O5grades of 7.0292 % and 3.546 %, respectively, as well as recovery of 49.42 % and 35.46 %.
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