Study on Ore Characteristics and Beneficiability of Three Flaky Graphite Mines in Africa
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摘要:
以马达加斯加Anbahita、莫桑比克Ancuaba及坦桑尼亚Chilalo三个地区鳞片石墨矿石为研究对象,系统研究了这三个地区石墨矿石中矿石特征及石墨的嵌布粒度。结果表明:Anbahita、Ancuaba、Chilalo三个地区石墨矿中矿物组成相似,且均为优质大鳞片石墨资源,矿石中石墨鳞片+0.18 mm粒级累积分布率分别为92.62%、98.33%、98.87%,石墨鳞片+0.85 mm粒级累积分布率分别为13.13%、52.70%、61.79%,其中Chilalo地区石墨矿中石墨鳞片粒径最大,此三个地区的矿石中石墨鳞片+0.15 mm粒级含量远高于国内相同类型石墨矿。三个矿样可选性均较好,其中Ancuaba精矿鳞片最大,Anbahita精矿鳞片最细。研究结果为该地区石墨矿石选矿及深加工提供了重要参考依据。
Abstract:Three flaky graphite mines in the regions of Madagascar Anbahita, Mozambique Ancuaba, and Tanzania Chilalo, were used to study the ore characteristics and grain size. The results show that the graphite mines of these three areas are high quality and large-flaky graphite resource with similar minerals components. Cumulative distribution rates of +0.18mm size fraction of graphite particles in Anbahita, Ancuaba and Chilalo are 92.62%, 98.33% and 98.87%, respectively. Cumulative distribution rates of +0.85 mm size fraction of graphite particles in Anbahita, Ancuaba and Chilalo are 13.13%, 52.70% and 61.79%, respectively. The graphite flake of Chilalo is the largest in these three areas. The +0.15 mm size fractions of graphite in these three regions are much higher than the same type of graphite ore in China. The beneficiability of these three samples are all relatively favourable. Among them, the flaky size of Ancuaba concentrate is the largest, the flaky size of Anbahita concentrate is the finest. These research results provide a significant reference for the beneficiation and down-stream processing of graphite resource in these areas.
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Key words:
- flaky graphite /
- large flake /
- Africa /
- dissemination size /
- Madagascar /
- Mozambique /
- Tanzania
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表 1 矿样矿物组成及含量
Table 1. Mineral composition and content of samples
矿物 石墨 石英 长石类 云母 金红石 赤褐铁矿 黄铁矿 高岭石 夕线石 其他 MO 5 60 16 8 <1 1~2 <1 - - <7 MA 7 50 - 8 - 2~3 2 23 5 <3 TA 15 55 5 14 1 2 4 1 1 <2 表 2 石墨的嵌布特征
Table 2. Characteristics of graphite particle size
粒级/μm 颗粒数百分比/% 分布率/% 累积分布率/% MA MO TA MA MO TA MA MO TA +850 0.59 4.99 13.17 13.13 52.70 61.79 13.13 52.70 61.79 -850+600 1.31 6.31 6.54 14.61 16.15 15.33 27.74 68.85 77.13 -600+500 1.77 11.63 5.27 9.84 14.87 6.18 37.58 83.72 83.31 -500+300 10.90 15.28 18.22 30.28 9.77 10.68 67.86 93.50 93.99 -300+230 11.20 8.64 11.08 15.55 2.76 3.25 83.41 96.26 97.24 -230+180 11.90 12.96 11.16 8.26 2.07 1.64 91.67 98.33 98.87 -180+150 9.29 6.64 6.88 3.23 0.53 0.50 94.89 98.86 99.38 -150+75 32.47 23.26 18.86 4.40 0.93 0.55 99.29 99.79 99.93 -75+45 12.19 4.01 6.21 0.53 0.08 0.06 99.82 99.87 99.91 -45 8.32 6.29 2.61 0.18 0.13 0.01 100.00 100.00 100.00 河南淅川 四川南江 吉林岫岩 黑龙江萝北 粒级/μm 累积分布率/% 粒级/μm 累积分布率/% 粒级/μm 累积分布率/% 粒级/μm 累积分布率/% +38 47.69 +150 15.99 +300 28.77 +300 23.02 -38+10 97.00 -150+74 49.30 -300+150 48.86 -300+150 53.25 -10 100.00 -74+37 85.61 -150+74 64.00 -150+74 80.80 -37 100.00 -74+37 78.12 -74+37 94.54 -37 100.00 -37 100.00 表 4 各流程药剂制度
Table 4. Reagent regime of each process
TA MO MA 煤油 2#油 煤油 2#油 煤油 2#油 粗选 264 120 176 148 350 220 精选Ⅰ 132 40 88 74 88 36 精选Ⅱ 44 40 — — 88 36 精选Ⅲ 44 40 — — 88 36 精选Ⅳ 44 40 — — 88 36 精选Ⅴ 44 40 — — 88 36 精选Ⅵ — — — — 88 36 精选Ⅶ — — — — 88 36 精选Ⅷ — — — — 88 36 扫选 44 40 132 111 — — 表 5 三个地区石墨矿石浮选精矿指标
Table 5. Flotation concentrate indexes of the samples
指标 MA MO TA 固定碳含量/% 94.96 97.09 94.94 回收率/% 90.91 95.87 85.07 精矿粒度组成/% +850 μm — 1.07 1.61 -850+500 μm 0.29 9.21 4.30 -500+300 μm 15.98 19.06 17.20 -300+180 μm 29.55 53.87 36.02 -180+150 μm 16.81 5.87 4.84 -150 μm 37.37 10.93 36.03 -
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