Separation Technology of a Spodumene Ore in Africa
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摘要:
这是一篇矿物加工工程领域的论文。非洲某伟晶岩锂矿中有用矿物以锂辉石为主，原矿Li2O含量为0.87%，属低品位锂矿，开发利用相对困难。本研究通过详细的浮选实验，采用“一粗二扫三精”的浮选工艺，获得了产率为10.15%的锂辉石精矿，含Li2O 6.03%，锂回收率70.14%。磁选除杂实验结果表明，锂浮选精矿经0.2 T磁选可获得化工级-1锂辉石精矿产品，经0.6 T磁选可获得陶瓷级锂辉石精矿产品，实现了该低品位锂矿的高质化利用。
Abstract:This is an essay in the field of mineral processing engineering. The useful mineral of a pegmatite lithium deposit in Africa is spodumene, and the raw ore contains 0.87% Li2O. It belongs to low-grade lithium ore, which is relatively difficult to develop and use. In this study, a spodumene concentrate with a yield of 10.15%, containing 6.03% Li2O and lithium recovery of 70.14% was obtained through detailed flotation tests and the flotation process of "one roughing, two scavengings and three cleanings". The magnetic separation test results show that chemical grade -1 spodumene concentrate can be obtained by 0.2 T magnetic separation of lithium flotation concentrate, and ceramic grade spodumene concentrate can be obtained by 0.6 T magnetic separation of lithium flotation concentrate, which realizes the high-quality utilization of this low-grade lithium ore.
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Key words:
- Mineral processing engineering /
- Spodumene /
- Low-grade /
- Flotation /
- Ceramic grade
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表 1 原矿多元素分析结果/%
Table 1. Multi-elements analysis results of the ore sample
Li2O Sn Ta2O5 Nb2O5 Na2O K2O Rb2O Cs2O MgO Al2O3 SiO2 Fe CaO 0.87 0.041 0.002 0.004 3.32 3.05 0.091 0.021 0.071 14.1 70.31 0.48 0.058 
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表 2 原矿中主要矿物及含量%
Table 2. Mineral composition and contents in the ore sample
锂辉石 锂云母 石英 长石 云母 绿柱石 高岭石 绿泥石 黑电气石 磁黄铁矿 褐铁矿 磷灰石 其他 合计 9.40 0.76 35.93 45.05 7.18 0.17 0.33 0.13 0.18 0.11 0.14 0.11 0.49 100.00
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表 3 浮选闭路实验结果
Table 3. Results of closed-circuit test
产物名称 产率/% Li2O品位/% Li2O回收率/% 锂精矿 10.15 6.03 70.14 尾矿 89.85 0.29 29.86 原矿 100.00 0.87 100.00
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表 4 锂粗精矿主要元素分析/%
Table 4. Main elements of lithium concentrate
Li2O MnO P2O5 K2O Na2O Fe2O3 6.03 0.17 0.50 0.93 0.65 4.80
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表 5 锂精矿磁选实验结果
Table 5. Results of lithium concentrate magnetic separation experiment
产品名称 产率/% 品位/% 回收率/% Li2O Fe2O3 Li2O Fe2O3 0.2 T磁选精矿 24.94 5.01 13.17 20.59 67.20 0.2 T磁选尾矿 75.06 6.42 2.13 79.41 32.80 0.2~0.4 T磁选精矿 9.52 4.6 11.03 7.22 21.50 0.4~0.6 T磁选精矿 6.82 6.18 2.93 6.95 4.09 0.6 T磁选尾矿 58.72 6.74 0.6 65.24 7.21 合计 100.00 6.07 4.89 100.00 100.00
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