Flotation Research on Recovery of Lithionite from Ta-Nb Tailing in Jiangxi
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摘要:
这是一篇矿物加工工程领域的论文。江西某钽铌尾矿中主要矿物为长石、石英、锂云母和黄玉，含少量的锂辉石、绢云母等，其中主要可利用矿物为锂云母。长期以来，该尾矿缺乏综合利用回收工艺。本次实验研究针对该尾矿中主要的可利用矿物锂云母进行浮选实验研究，确定合理的选矿回收工艺，为该尾矿的综合利用提供技术依据。针对该矿石的工艺矿物学性质，确定采用浮选工艺对锂云母进行回收。通过一系列浮选条件实验，采用HZ-00和十二胺作为组合捕收剂，Na2CO3为pH值调整剂，以水玻璃为抑制剂的条件下，采用“一粗一扫一精”的浮选工艺流程，浮选闭路实验可获得锂云母精矿Li2O品位为3.02%、回收率为72.41%的实验指标，实验结果较为理想。
Abstract:This is an essay in the field of mineral processing engineering. The main minerals in tantalum niobium tailings in Jiangxi Province are feldspar, quartz, lithionite and topaz, containing a small amount of spodumene and sericite, among which the main available minerals are lithionite. For a long time, the tailings lack a comprehensive utilization and recycling process. This test study studies the flotation test of the main available mineral lithium mica in the tailings, determines the reasonable beneficiation recovery process, and provides a technical basis for the comprehensive utilization of the tailings. According to the process mineralogy properties of the ore, the lithium mica was recovered. Through a series of flotation condition tests, HZ-00 and dodecylamine are used as the combination catcher, Na2CO3 is pH value adjustment agent, water glass as the inhibitor, the flotation process of "one coarse, one sweep and one fine", the flotation closed circuit test can obtain Li2O grade of 4.3.02%, the recovery rate of 72.41%, and the test results are relatively ideal.
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Key words:
- Mineral processing engineering /
- Ta-Nb tailing /
- Lithionite /
- Flotation reagent /
- Flotation test
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表 1 原矿多元素化学分析结果/%
Table 1. Chemical analysis results of raw ore
Li2O K2O Na2O CaO MgO SiO2 Al2O3 Fe2O3 TiO2 MnO P2O5 烧失量 Ta2O5 Nb2O5 0.53 3.50 3.40 0.37 0.085 69.86 15.94 0.85 0.018 0.16 0.78 3.22 0.0039 0.0062 
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表 2 锂云母矿物单体解离度
Table 2. Degree of mineral liberation of lithionite
粒级/mm 产率/% 单体/% 连生体/% 1/4 2/4 3/4 +0.45 50.79 75.68 1.35 4.32 18.65 -0.45+0.15 24.08 92.52 0.15 0.62 6.71 -0.15+0.076 12.57 100.00 0 0 0 -0.076+0.045 5.23 100.00 0 0 0 -0.045 7.33 100.00 0 0 0 合计 100.00 — — — —
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表 3 原矿样品粒度分布
Table 3. Grain size distribution of raw ore samples
粒级/mm 产率/% 累计产率/% Li2O品位/% 分布率/% +0.25 13.71 13.71 1.39 27.08 -0.25+0.15 21.89 35.60 0.90 27.99 -0.15+0.096 20.36 55.96 0.69 19.96 -0.096+0.074 12.02 67.98 0.51 8.71 -0.074+0.045 26.73 94.71 0.36 13.67 -0.045+0.038 3.66 98.37 0.35 1.82 -0.038 1.63 100.00 0.33 0.76 原矿 100.00 — 0.70 100.00
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表 4 探索实验结果
Table 4. Results of exploratory tests
方案 产率/% Li2O品位/% 回收率/% 方案一 19.53 2.89 79.58 方案二 14.52 2.16 44.91 方案三 13.57 1.91 36.57
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表 5 开路实验结果
Table 5. Results of condition tests
产品名称 产率/% Li2O品位/% 回收率/% 锂云母精矿 10.35 3.10 67.04 精选中矿 3.98 0.99 5.63 扫选中矿 3.59 1.22 6.32 锂云母尾矿 82.08 0.18 21.01 给矿 100.00 0.70 100.00
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表 6 闭路实验结果
Table 6. Results of the closed circuit test
产品名称 产率/% Li2O品位/% 回收率/% 锂云母精矿 13.94 72.41 3.02 锂云母尾矿 86.06 0.14 27.59 给矿 100.00 0.71 100.00
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