Flotation Test of a Gneiss Scale Graphite Ore
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摘要:
黑龙江某片麻岩鳞片石墨矿石结构属于片麻岩型石墨矿，脉石矿物以石英、长石、白云母为主，金属矿物有少量的褐铁矿。原矿总固定碳含量为8.03%，通过酸浸-碱熔-酸洗分析得知：原矿中+0.15 mm大鳞片石墨的固定碳含量占总固定碳含量的37.58%。原矿经一次粗选一次扫选、粗精矿八次再磨八次精选的阶段磨浮工艺流程，最终获得的精矿固定碳品位90.53%、精矿固定碳回收率94.07%。其中+0.15 mm精矿固定碳品位达到95.26%、固定碳回收率为17.67%，+0.15 mm大鳞片石墨的保护率为47.02%。
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关键词:
- 石墨 /
- +0.154 mm大鳞片 /
- 浮选 /
- 品位 /
- 回收率
Abstract:The structure of a certain graphite ore in Heilongjiang province belongs to gneiss type graphite ore, the gangue minerals are mainly quartz, feldspar and mica, and the metal minerals contain a small amount of limonite. The total fixed carbon content of the raw ore is 8.03%. The fixed carbon content of + 100 mesh large scale graphite in the raw ore accounts for 37.58% of the total fixed carbon content. After the process of one roughing, one scavenging and eight regrinding and eight cleaning, the fixed carbon grade of concentrate is 90.53% and the fixed carbon recovery rate of concentrate is 94.07%. Among them, the fixed carbon grade of + 0.15 mm concentrate is 95.26%, the fixed carbon recovery rate is 17.67%, and the protection rate of +0.15 mm large scale graphite is 47.02%.
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Key words:
- Graphite /
- +0.15 mm large scale /
- Flotation /
- Grade /
- Recovery
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表 1 化学多项分析/%
Table 1. Chemical analysis of multi-elements
固定碳 SiO2 Al2O3 TFe2O3 MgO CaO Ag* Na2O K2O S MnO TiO2 P2O5 Au* 8.03 59.08 14.21 4.8 1.11 2.47 0.66 0.73 3.1 0.036 0.037 0.51 0.13 0.025 *单位为g/t。 
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表 2 原矿大鳞片石墨分布
Table 2. Large flake graphite distribution of the ore
粒级/mm 产率/% 固定碳/% 固定碳分布率/% +0.27 0.65 94.63 7.66 -0.27+0.198 1.67 95.84 19.93 -0.198+0.15 0.85 94.36 9.99 -0.15 96.83 5.18 62.42 合计原矿 100.00 8.03 100.00
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表 3 开路实验结果
Table 3. Results of open-circuit test
产品名称 产率/% 固定碳品位/% 固定碳回收率/% 精矿 5.96 91.22 67.79 中矿8 0.83 61.73 6.39 中矿7 0.83 55.88 5.78 中矿6 0.90 29.30 3.29 中矿5 1.10 17.20 2.36 中矿4 1.94 8.59 2.08 中矿3 2.66 5.01 1.66 中矿2 6.93 3.88 3.35 中矿1 10.94 1.23 1.68 扫选精矿 2.51 7.82 2.45 尾矿 65.40 0.39 3.17 合计原矿 100.00 8.02 100.00
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表 4 产品分析结果
Table 4. Product analysis results
产品名称 产率/% 固定碳回收率/% 固定碳品位/% +0.15 mm精矿 1.49 17.68 95.26 -0.15 mm精矿 6.85 76.38 89.52 合计精矿 8.34 94.06 90.55 尾矿 91.66 5.94 0.52 合计原矿 100.00 100.00 8.03
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