Study on Resource Utilization Technology of Typical Copper Tailings from Panxi Region
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摘要:
为解决攀西地区某典型尾矿资源化利用问题，对该低品位尾矿进行了综合回收利用研究。基于尾矿工艺矿物学研究结果，研发了适合该尾矿性质的“浮磁重梯次回收有用矿物—尾矿制硅肥”的工艺技术路线，在回收利用有价元素基础上，使难利用的尾矿资源变成了产率11.78%、K2O品位7.77%、回收率25.92%的云母精矿和有效硅含量40%以上的硅肥产品，尾矿减少64.66%，实现了尾矿资源化及减量化。
Abstract:In order to solve the problems of typical tailings resource utilization from Panxi region, the technology of comprehensive utilization of the low-grade tailings was studied. Based on the research results of mineralogy of tailings process, the technical route of "floating-magnetic-gravity echelon recovery of useful mineral——silicon fertilizer from tailings" suitable for the tailing property is determined. On the basis of the recovery and utilization of valuable elements, the hard-to-use tailing resources are transformed into mica concentrate withyield of 11.78%、K2O grade 7.77%、recovery rate of 25.92% and silicon fertilizer products with effective silicon more than 40%. The tailings can be reduced by 64.66%, thus realizing the resource recovery and reduction of tailing.
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表 1 尾矿主要元素化学分析结果/%
Table 1. Chemical analysis results of the main elements of tailings
Cu S K2O Na2O Al2O3 SiO2 CaO MgO TFe P2O5 TREO 烧失 0.040 0.20 3.06 3.05 13.42 50.12 5.93 2.05 8.10 0.73 0.154 6.32 
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表 2 铜浮选闭路实验结果
Table 2. Results of copper flotation closed-circuit test
产品名称 产率/% 品位/% 回收率/% Cu S Cu S 铜硫精矿 0.86 1.13 18.31 24.71 71.37 尾矿 99.14 0.030 0.0064 75.29 28.63 原矿 100.000 0.040 0.22 100.00 100.00
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表 3 铁矿物回收实验结果
Table 3. Results of iron recovery test
磁场强度
/Oe产品
名称产率/% TFe品位/% 回收率/% 作业 对原矿 作业 对原矿 800 铁精矿 1.23 1.22 54.22 9.80 9.72 尾矿 98.77 98.78 6.21 90.20 给矿 100.00 100.00 6.80 100.00 1000 铁精矿 1.27 1.26 54.61 9.64 9.56 尾矿 98.73 98.74 6.60 90.36 给矿 100.00 100.00 7.21 100.00 1200 铁精矿 1.31 1.30 53.15 9.91 9.82 尾矿 98.69 98.70 6.42 90.09 给矿 100.00 100.00 7.04 100.00 1400 铁精矿 1.29 1.28 53.53 9.67 9.59 尾矿 98.71 98.72 6.56 90.33 给矿 100.00 100.00 7.17 100.00
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表 4 重选精选实验结果
Table 4. Test results of gravity and cleaning separation
产品名称 作业产率/% K2O品位/% K2O作业回收率/% 云母精矿 26.17 7.77 42.26 中矿 18.25 4.37 16.58 尾矿 55.58 3.56 41.46 给矿 100.00 4.38 100.00
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表 5 助剂种类实验结果
Table 5. Test results of fertilizer kinds
助剂种类 样品∶助剂 烧失率/% 产品有效硅含量/
（以SiO2计，%）碳酸钠 30∶6 3.7 0.23 氢氧化钠 30∶3 2.2 0.15 生石灰 20∶10 3.2 37.26 碳酸钙 20∶10 5.2 35.17 碳酸钾 30∶6 3.1 1.40
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表 6 助剂用量实验结果
Table 6. Test results of fertilizer dosage
助剂碳酸钙
用量/g样品∶助剂 烧失率/% 产品有效硅含量/
（以SiO2计，%）5.0 20∶5 3.4 1.27 7.5 20∶7.5 4.6 14.02 10 20∶10 5.7 35.72 15 20∶15 8.0 46.79 20 20∶20 10.2 42.31
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表 7 焙烧温度实验结果
Table 7. Test results of calcination temperature
样品∶碳酸钙 焙烧温度/
℃焙烧时间/
h烧失率/
%产品有效硅含量/
（以SiO2计，%）20∶15 900 2 5.5 11.94 20∶15 1000 2 5.6 14.65 20∶15 1100 2 5.6 26.00 20∶15 1200 2 5.6 45.38
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