Experimental Study on Flotation of Skarn Scheelite in Gejiu City, Yunnan Province with a New Hydroxamic Acid Collector
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摘要:
以云南个旧卡房矽卡岩型白钨矿为研究对象，针对原工艺GY-10捕收剂浮选体系下钨总回收率偏低的问题，为提高钨资源综合利用水平，应用新型白钨矿捕收剂KF-1进行了选矿试验研究。结果表明，脱硫浮选后，钨常温粗选碳酸钠、水玻璃和捕收剂用量分别为2 000 g/t、4 000 g/t和150 g/t，钨加温精选温度为85 ℃，保温时间为1 h，钨加温精选氢氧化钠、水玻璃和捕收剂用量分别为200 g/t、1 200 g/t和3 g/t，最终获得了钨精矿品位55.65%、钨回收率为77.35%的技术指标，与GY-10相比，钨总回收率提高了14百分点，实现了卡房矽卡岩型白钨矿的高效综合利用。
Abstract:In order to improve the comprehensive utilization level of tungsten resources, a new collector KF-1 was used to recover the skarn scheelite ore in Kafang mining area, Gejiu City, Yunnan Province. The results show that after the desulfurization flotation, the roughing tests at room temperature have been conducted, and the dosage of sodium carbonate, sodium silicate and collector has been determined as 2 000 g/t, 4 000 g/t and 150 g/t, respectively. Then after heating the coarse concentrate to 85 ℃ and holding for 1 h, the cleaning tests have been conducted, and the dosage of sodium hydroxide, sodium silicate and collector has been determined as 200 g/t, 1 200 g/t and 3 g/t, respectively. Finally, a tungsten concentrate assaying 55% WO3 with tungsten recovery of 77% has been obtained. Compared with GY-10, the total recovery of tungsten has been increased by 14%, and the efficient comprehensive utilization of skarn scheelite in Kafang mining area has been realized.
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Key words:
- scheelite /
- flotation /
- collector /
- heating flotation /
- calcite
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表 1 矿石主要元素分析结果
/% Table 1. Analysis results of main elements of the ore
成分 WO3 Cu S Al2O3 CaO SiO2 MgO 含量 0.20 0.086 0.76 4.06 25.74 39.12 1.66 
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表 2 主要矿物组成测定结果
/% Table 2. Determination results of the main mineral composition
矿物 含量 矿物 含量 矿物 含量 白钨矿 0.256 黑云母 2.258 绿泥石 0.185 黑钨矿 微量 绢云母 0.588 方解石 13.947 黄铜矿 0.099 透辉石 37.26 白云石 0.283 黄铁矿 0.650 钙铁榴石 16.771 菱铁矿 0.134 磁黄铁矿 0.974 钙铝榴石 4.014 磁铁矿 0.103 石英 4.261 绿帘石 0.423 褐铁矿 0.195 长石 6.564 阳起石 0.541 钛铁矿 0.027 硅灰石 2.589 角闪石 3.749 榍石 0.342
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表 3 不同磨矿细度下白钨矿单体解离度测定结果
/% Table 3. Determination results of the dissociation degree of scheelite monomer under different grinding fineness
磨矿细度(-0.074 mm含量) 50 60 70 80 单体解离度 75.12 80.45 91.65 93.19
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表 4 脱硫流程试验结果
/% Table 4. Test results of the desulfurization process
产品名称 产率 品位 回收率 WO3 S WO3 S 硫化物 1.97 0.18 35.46 1.77 92.23 选钨给矿 98.03 0.20 0.06 98.23 7.77 给矿 100.00 0.20 0.76 100.00 100.00
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表 5 钨常温粗选闭路试验结果
/% Table 5. Closed-circuit test results of the tungsten roughing at room temperature
钨捕收剂 产品名称 作业产率 WO3品位 WO3作业回收率 GY-10 钨粗精矿 1.96 7.79 76.48 尾矿 98.04 0.049 23.52 给矿 100.00 0.20 100.00 KF-1 钨粗精矿 2.77 6.20 86.34 尾矿 97.23 0.029 13.66 给矿 100.00 0.20 100.00
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表 6 钨加温精选闭路试验结果
/% Table 6. Closed-circuit test results of the tungsten heating fine selection
钨捕收剂 产品名称 作业产率 WO3品位 WO3作业回收率 GY-10 钨精矿 9.52 69.35 84.68 加温精选尾矿 90.48 1.32 15.32 给矿 100.00 7.79 100.00 KF-1 钨精矿 10.25 55.65 91.11 加温精选尾矿 89.75 0.62 8.89 给矿 100.00 6.26 100.00
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表 7 综合试验指标对比结果
/% Table 7. Comparison results of comprehensive test indexes
钨捕收剂 产品名称 产率 WO3品位 WO3回收率 GY-10 钨精矿 0.18 69.35 63.59 加温精选尾矿 1.74 1.32 11.50 硫化物 1.97 0.18 1.78 尾矿 96.11 0.048 23.13 原矿 100.00 0.20 100.00 KF-1 钨精矿 0.28 55.65 77.35 加温精选尾矿 2.44 0.62 7.55 硫化物 1.97 0.18 1.77 尾矿 95.31 0.028 13.33 原矿 100.00 0.20 100.00
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