Study on the Comprehensive Recovery of Sulfur and Iron from Copper Tailings in Australia
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摘要:
对澳大利亚某铜尾矿进行了选矿试验研究,采用浮选—磁选联合工艺流程,综合回收尾矿中的硫、铁元素。试验结果表明:采用新型XT-01作为硫铁矿捕收剂,可获得硫品位为49.80%、回收率为92.58%的硫精矿;浮硫尾矿采用湿式弱磁选机磁选,获得了铁品位为64.11%、全铁回收率为45.91%的铁精矿,实现了铜尾矿中硫、铁的综合回收。
Abstract:Detailed beneficiation test research was conducted on a copper tailings from Australia, and then a combined flowsheet of flotation-magnetic separation was adopted for comprehensive recovery of sulfur and iron in tailings. The result showed that new-type XT-01 as the collector for pyrite, a sulfur concentrate with the sulfur grade of 49.80% and recovery of 92.58% can be obtained. After flotation, the magnetic separation test which used wet low intensity magnetic separator has been done on flotation tailings, an iron concentrate with the iron grade of 64.11% and the total iron recovery of 45.91% was obtained. Comprehensive recovery and utilization of sulfur and iron in copper tailings was realized.
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Key words:
- copper tailings /
- sulfur /
- iron /
- collector /
- comprehensive utilization
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表 1 化学多元素分析结果 /%
Table 1. Chemical analysis results
化学成分 S SiO2 CaO MgO TFe Al2O3 Au Cu 含量 5.23 39.56 8.43 1.40 21.37 13.89 0.8 0.14 注:Au单位为g/t。 表 2 铁物相分析结果 /%
Table 2. Iron phase analysis results
铁物相 磁铁矿 碳酸盐 硅酸盐 硫化物 赤褐铁矿及其他 总铁 Fe含量 9.91 0.94 1.93 6.48 2.11 21.37 Fe分布率 46.37 4.41 9.03 30.32 9.87 100.00 表 3 粒度分析结果
Table 3. Particle size analysis results
粒级/μm 产率/% S品位/% S分布率/% 个别 累计 个别 平均 个别 累计 +74 25.32 25.32 0.81 0.81 3.70 3.70 -74+44 13.79 39.11 3.69 1.83 9.18 12.88 -44+37 11.28 50.39 7.26 3.04 14.77 27.65 -37+28 9.61 60.00 8.70 3.95 15.08 42.73 -28 40.00 100.00 7.61 5.41 57.27 100.00 合计 100.00 5.41 100.00 表 4 捕收剂种类试验结果 /%
Table 4. Test results of collector species
捕收剂种类 产品 产率 S品位 S分布率 个别 累计 个别 平均 个别 累计 XT-01 粗精矿Ⅰ 10.11 45.19 87.31 粗精矿Ⅱ 2.25 12.36 12.76 39.29 5.49 92.80 粗精矿Ⅲ 1.51 13.87 7.30 35.80 2.10 94.90 尾矿 86.13 100.00 0.31 5.23 5.10 100.00 丁基黄药 粗精矿Ⅰ 10.28 43.28 85.12 粗精矿Ⅱ 2.30 12.58 12.26 37.61 5.41 90.53 粗精矿Ⅲ 1.53 14.11 7.22 34.31 2.12 92.65 尾矿 85.89 100.00 0.45 5.23 7.35 100.00 MC44 粗精矿Ⅰ 7.35 43.35 60.89 粗精矿Ⅱ 1.98 9.33 22.56 38.94 8.54 69.43 粗精矿Ⅲ 0.83 10.16 15.27 37.00 2.42 71.85 尾矿 89.84 100.00 1.64 5.23 28.15 100.00 A31 粗精矿Ⅰ 10.07 43.96 84.59 粗精矿Ⅱ 2.43 12.50 15.50 38.43 7.20 91.79 粗精矿Ⅲ 1.67 14.17 8.76 34.93 2.80 94.59 尾矿 85.83 100.00 0.33 5.23 5.41 100.00 表 5 闭路试验结果 /%
Table 5. Results of closed-circuit test
产品 产率 S品位 S回收率 精矿 9.79 49.80 92.58 尾矿 90.21 0.43 7.42 给矿 100.00 5.27 100.00 表 6 硫精矿主要化学成分分析结果 /%
Table 6. Main chemical composition analysis results of sulfur concentrate
化学成分 S SiO2 Fe Au Al2O3 Cu As 含量 49.80 3.31 44.15 2.1 1.03 0.66 <0.1 注:Au单位为g/t。 表 7 铁精矿主要化学成分分析结果 /%
Table 7. Main chemical composition analysis results of iron concentrate
化学成分 S P SiO2 As Fe 含量 0.18 0.029 7.43 <0.1 64.11 -
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