Study on the reasonable electrostatic separation feeding ore grade in the process of gravity-electrostatic separation of coarse ilmenite in Panxi region
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摘要: 根据攀西某粗粒级钛铁矿的粒度特性，开展了不同电选给矿TiO2品位的“重选-电选”流程试验，并对流程指标和不同给矿规模下的成本效益进行了对比。研究表明“重选-电选”流程合理电选给矿品位应控制在20%<TiO2<25%，为攀西粗粒级钛铁矿“重选-电选”流程合理电选给矿品位的确定提供了技术依据。Abstract: According to the size characteristic of a coarse ilmenite in Panxi region, the process of gravity-electrostatic separation in different TiO2 grades was carried out, and the production index and cost-effectiveness in different feeding ore were compared. The results show that the process of gravity-electrostatic separation is reasonable, and the grade of electrostatic separation feeding ore should be controlled between 20% and 25%. This study provides a technical basis for determining the reasonable feeding ore grade of electrostatic separation in the process of gravity-electrostatic separation.
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Key words:
- ilmenite /
- gravity separation /
- electrostatic separation /
- feeding grade /
- recovery
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图 2 1#、2#和3#三种不同品位的重选精矿试验结果
Figure 2. Three different grade concentrates of gravity concentration
图 3 1#～3#重选精矿弱磁除铁试验结果
Figure 3. The results of low-intensity magnetic separation for three gravity concentrates
图 5 1#～3#样电选精选试验结果
Figure 5. The results of electrostatic separation for three tailings of magnetic separation
表 1 原矿全粒级筛析结果
Table 1. Sieve analysis results of different grain size samples of raw ore
粒级/mm 产率/% TiO2品位/% TiO2金属分布率/% 个别 累计 个别 累计 +0.56 5.19 5.19 3.68 1.22 1.22 −0.56～+0.20 30.77 35.96 11.60 23.00 24.22 −0.20～+0.10 13.89 49.85 18.74 16.77 40.99 −0.10～+0.074 22.08 71.93 20.38 28.99 69.98 −0.074～+0.038 13.19 85.12 19.63 16.68 86.66 −0.038 14.88 100.00 13.92 13.34 100.00 合计 100.00 15.52 100.00 
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表 2 原矿粗细分级试验结果
Table 2. The screening results of raw ore
% 产品 产率 TiO2品位 TiO2回收率 筛上物 70.70 15.21 67.46 筛下物 29.30 17.70 32.54 给矿 100.00 15.94 100.00
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表 3 钛精矿流程指标汇总
Table 3. Summary of process indicators for ilmenite concentrates
% 编号 产率 TiO2品位 TiO2回收率 1# 24.46 47.70 76.77 2# 22.26 47.74 69.96 3# 20.83 47.28 64.75
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表 4 选钛工序成本估算
Table 4. Cost estimation of titanium separation process
选钛工序 成本/(元·t−1) 给矿/t 工序成本/元 1# 2# 3# 1# 2# 3# 重选富集 2 1 1 1 2.00 2.00 2.00 除铁 2 0.6198 0.4632 0.3432 1.24 0.93 0.69 干燥 80 0.5758 0.4359 0.3262 46.06 34.87 26.10 电选 20 0.5758 0.4359 0.3262 11.52 8.72 6.52 隔渣 2 0.2636 0.2439 0.2199 0.53 0.49 0.44 浮硫 2 0.2502 0.2283 0.2133 0.50 0.46 0.43 包装 20 0.2446 0.2226 0.2083 4.89 4.45 4.17 单位给矿 66.74 51.91 40.34 单位钛精矿 272.85 233.19 193.67
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表 5 选钛原矿规模、电选给矿品位与电选钛精矿利润估算
Table 5. Raw ore capacity of titanium separation, feeding ore grade of electrostatic separation, and profit estimation of electrostatic separation of ilmenite concentrate
电选给矿TiO2品位/% 不同选钛原矿规模（万t·a−1）的利润/万元 250 500 750 1000 22.11 56695.22 113390.45 170085.67 226780.89 26.14 53802.98 107605.95 161408.93 215211.91 31.20 52404.63 104809.27 157213.90 209618.54
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