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摘要:
某石英型萤石矿CaF2含量45.684%，通过选矿实验确定了选别该矿石的工艺流程和药剂制度，提供了相关工艺参数和技术指标。磨矿细度为-0.074 mm 90%，用碳酸钠作调整剂，JK-3和水玻璃作组合抑制剂，YP-2作捕收剂，采用一粗五精一扫，精Ⅰ尾和扫Ⅰ精再选，中矿合并返回的闭路工艺，精矿CaF2品位为97.682%，回收率为91.87%。实验结果表明矿石中的主要有价矿物萤石得到了充分的回收，产品质量较高，指标较为理想，为选矿设计提供了科学依据。
Abstract:The CaF2 content of a quartz fluorite ore is 45.684%. Through beneficiation test, the technological process and reagent system are determined, and the relevant technological parameters and technical indexes are provided. The grinding fineness is -0.074 mm, accounting for 90%. With sodium carbonate as regulator, JK-3 and sodium silicate as combined inhibitor, YP-2 as collector, the closed-circuit process of one roughing, five refining and one scavenging, separate flotation of cleaning I tailings and scavenging I concentrate and integrated return of middling is adopted. The CaF2 grade of concentrate is 97.682%, and the recovery is 91.87%. The test results show that the main valuable mineral fluorite in the ore has been fully recovered, the product quality is high, and the index is ideal, which provides a scientific basis for mineral processing design.
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Key words:
- Quartz fluorite deposit /
- Flotation /
- Midst product /
- Stage grinding and dressing
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表 1 原矿多元素分析结果/%
Table 1. Results of multi element analysis of raw ore
CaF2 CaCO3 Cu Pb Zn Fe As 45.684 0.483 0.029 0.030 0.015 1.003 0.011 S P MgO Al2O3 Ag* SiO2 BaSO4 0.365 0.010 0.926 7.752 0.36 28.612 2.634 *单位为g/t。 
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表 2 中矿再选实验流程结果
Table 2. Results of middlings reprocessing test process
产品名称 产率% CaF2品位% CaF2回收率% 精矿 45.20 91.728 92.53 中精 7.90 27.846 4.91 中尾 11.20 6.188 1.55 尾矿 35.70 1.274 1.02 原矿 100.00 44.809 100.00
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表 3 阶段磨矿阶段选别工艺考查实验结果
Table 3. Test results of stage grinding stage beneficiation process
产品名称 产率/% CaF2品位/% 回收率/% 累计/% 精矿 23.65 99.00 52.30 精尾5 2.66 96.10 5.70 58.00 精尾4 1.88 90.45 3.79 61.79 精尾3 2.92 79.17 5.16 66.95 精尾2 6.56 66.43 9.74 76.69 精尾1 20.52 38.77 17.77 94.46 扫选 3.75 18.20 1.52 95.98 尾矿 38.07 4.72 4.02 100.00 原矿 100.00 44.76 100.00
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表 4 中矿集中返回闭路实验结果
Table 4. Closed circuit test results of middlings centralized return
产品名称 产率/% CaF2品位/% CaF2回收率/% 精矿 42.68 97.682 91.87 尾矿 57.32 6.433 8.13 原矿 100.00 45.378 100.00
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表 5 精矿多元素分析结果/%
Table 5. Multi element analysis results of concentrate
CaF2 CaCO3 Cu Pb Zn Fe As S P SiO2 97.682 0.062 0.007 0.009 0.003 0.104 0.004 0.026 0.014 0.842
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