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摘要:
这是一篇矿物加工工程领域的文章。本文以德昌大陆槽稀土选矿尾矿为研究对象，开展了萤石回收的选矿实验研究，确定了该尾矿中萤石回收的“浮选脱硫-混合浮选-萤石、锶钡浮选分离”选矿工艺流程和药剂制度，在浮选实验中使用了新型捕收剂MQY与高效抑制剂DC-2，在对萤石高效捕收的同时实现了萤石与脉石矿物的精准分离，最终全流程实验获得了CaF2品位94.39%，回收率51.41%的萤石精矿，实验指标较为理想。本文验证了从大陆槽稀土尾矿中回收萤石具有较好的可行性，最终确定的选矿工艺流程较为合理，实验指标较为良好，可作为大陆槽稀土尾矿中萤石资源利用回收的技术依据。
Abstract:This is an article in the field of mining processing engineering. This article takes Dechang Daluchao rare earth mineral processing tailings as the research object, conducts a beneficiation test study on fluorspar recovery, and determines the beneficiation process flow and reagent of "flotation desulphurization - mixed flotation - flotation separation of fluorite, strontium and barium" for fluorite recovery. In the flotation test, the new MQY collector and DC-2 high-efficiency inhibitor were used to efficiently capture fluorite while achieving precise separation of fluorite and gangue minerals. In the final full-process test, a fluorspar concentrate with a CaF2 grade of 94.39% and a recovery rate of 51.41% was obtained. The test indicators were relatively ideal. This article tested and verified the feasibility of recovering fluorspar from the Dalunchao rare earth tailings. The final beneficiation process is reasonable and has good test indicators. It can be used as a technical basis for the utilization and recovery of fluorspar resources in the Dalunchao rare earth tailings.
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Key words:
- Mining processing engineering /
- Rare earth tailings /
- Fluorite /
- Mixed flotation /
- Inhibitor
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表 1 样品化学多项分析结果/%
Table 1. Results of chemical multi-element analysis of the samples
TREO SrO CaF2 BaO SiO2 Al2O3 MgO Fe2O3 S K2O MnO Ti Na2O Zn Pb 1.17 17.25 15.71 5.61 12.51 4.12 0.51 2.61 1.31 1.92 0.09 0.05 0.63 0.03 0.31 
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表 2 样品筛分分析结果
Table 2. Results of screen analysis of the samples
粒级/mm 产率/% 萤石品位/% 分布率/% +0.15 41.21 14.19 37.65 -0.15+0.074 20.38 16.37 21.48 -0.074+0.045 11.29 17.04 12.39 -0.045+0.031 7.92 17.82 9.09 -0.031 19.20 15.69 19.40 给矿 100.00 15.53 100.00
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表 3 闭路实验结果
Table 3. Results of the closed-circuit test
产品名称 产率/% CaF2品位/% CaF2回收率/% 硫精矿 1.59 15.38 1.61 萤石精矿 8.21 94.68 51.41 尾矿I 65.61 3.70 16.07 尾矿II 21.32 14.79 20.88 原矿 100.00 15.61 100.00
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