Flotation Test of a High-grade Secondary Copper Sulfide Ore from Serbia
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摘要:
针对塞尔维亚某高品位次生硫化铜矿石，结合矿石性质与浮选工艺特点，进行了磨矿细度、调整剂、捕收剂种类和用量、粗精矿再磨细度等一系列条件实验，确定了较佳工艺参数范围；采用铜优先浮选，粗精矿再磨再选的工艺流程，经过一次粗选、二次精选以及二次扫选的闭路流程实验，最终获得产率为8.3%，铜品位为25.87%、铜回收率为91.37%的铜精矿，铜精矿含金5.9 g/t，金回收率28.15%，铜精矿铜和金回收率指标在工艺矿物学预测范围内。推荐的工艺流程简单、指标优良，为该矿山开发提供了有力的数据支撑。
Abstract:In view of a high-grade secondary copper sulfide ore from Serbia, combined with ore properties and flotation process characteristics, a series of experiments on grinding fineness, regulator, depressant, collector species and their dosage, and regrinding fineness of rougher concentrate were carried out, and the optimum range of technological parameters was determined. The process flow of copper preferential flotation and regrinding and recleaning of rougher concentrate is adopted. Though the closed-circuit test of one roughing, two cleaning, and two scavening, the copper concentrate is obtained with yield of 8.3%, copper grade of 25.87% and recovery of 91.37%, the gold content of copper concentrate is 5.9 g/t, and the gold recovery rate is 28.15%. The copper and gold recovery indexes of the copper concentrate are within the prediction range of the process mineralogy. The recommended process is simple and the index is excellent, which provides strong data support for the mine development.
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Key words:
- copper sulfide /
- secondary sulfide /
- mineral processing test /
- copper-pyrite separation
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表 1 原矿多元素化学分析结果/%
Table 1. Multi-element analysis results of the raw ore
Au* Ag* Cu S Pb Zn As SiO2 Al2O3 2.06 3.46 2.42 18.51 0.017 0.013 0.08 45.8 6.28 Fe Na2O K2O MgO Cr Ba Be MnO Ni 11.63 0.062 1.31 <0.01 <0.01 0.16 <0.01 0.017 <0.01 *单位为g/t。 
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表 2 铜物相分析结果
Table 2. Analysis results of copper phases
铜物相 原生
硫化铜次生
硫化铜自由
氧化铜结合
氧化铜总铜 含量/% 0.45 1.92 0.07 0.01 2.45 占有率/% 18.37 78.33 2.70 0.60 100.00
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表 3 铜硫化物粒度及解离连生关系分析结果
Table 3. Analysis results of relationship between particles and association attachment of copper sulfide
铜硫化物连生
类型（X）产率/% 连生关系/% 铜硫化物粒度分布/% 与Py 与其他 -10 µm -20+10 µm -38+20 µm -74+38 µm -150+74 µm +150 µm X=100% 64.20 / / 0.34 14.25 18.36 16.89 14.36 / X=100%～80% 24.02 19.65 4.37 0.01 0.15 0.50 3.13 10.12 10.11 X=80%～50% 6.29 6.29 / 0.06 0.06 0.50 1.57 4.10 / X<50% 5.49 3.46 2.03 0.59 1.15 2.25 1.50 / / 合计 100.00 29.40 6.40 1.00 15.61 21.61 23.09 28.58 10.11 注：X为目标矿物在连生体中占比，Py为黄铁矿缩写，下同。
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表 4 主要矿物中金的分配结果
Table 4. Distribution results of gold in main minerals
矿物名称类别 黄铁矿 铜蓝等
铜硫化物非硫
化物解离金+
连生金合计 矿物含量/% 27.26 3.92 68.82 / 100.00 Au品位/（g/t） 3.48 11.71 0.46 / 2.06 Au分配率/% 46.05 22.28 15.37 16.30 100.00
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表 5 闭路实验结果
Table 5. Test results of the closed-circuit test
产品名称 产率/% 品位/% 回收率/% Cu Au* S As Cu Au S As 铜精矿 8.30 25.87 5.90 40.33 0.87 91.37 28.15 18.37 90.41 硫精矿 35.96 0.46 2.85 28.37 0.018 7.05 63.47 60.31 4.90 尾矿 55.74 0.19 0.23 6.31 0.01 1.58 8.38 21.32 4.69 原矿 100.00 2.35 1.61 16.91 0.08 100.00 100.00 100.00 100.00 *单位为g/t。
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