Reverse Flotation of Bastnaesite Using a New Type of Saturated Fatty Acid Modified Collector DT-2
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摘要:
在实验室合成了新型饱和脂肪酸改性类捕收剂DT-2,考察了其对氟碳铈矿、方解石、重晶石、萤石浮选特性的影响规律。试验结果表明:在矿浆温度20 ℃、DT-2捕收剂用量33.34 mg/L、pH=8时氟碳铈矿的回收率为26%,脉石矿物的回收率均在95%以上,可以实现氟碳铈矿与脉石矿物的分离,因此DT-2可以考虑作为反浮选捕收剂。红外光谱检测及Zeta电位检测结果表明:捕收剂DT-2与氟碳铈矿以及脉石矿物之间均不存在静电吸附,而是发生了化学吸附。研究结果为DT-2在氟碳铈矿分选提纯中的应用提供了理论基础。
Abstract:A new type of saturated fatty acid modified collector DT-2 was synthesized in laboratory, the flotation characteristics of bastnasite, calcite, barite and fluorite were investigated. Test results showed that the recovery of bastnasite was 26%, and the recovery of gangue minerals was over 95% when the pulp temperature was 20 ℃, the amount of collector was 33.34 mg/L and the pH was 8. Hence, DT-2 can be used as anti-flotation collector to realize separation of cerium ore and gangue minerals. The results of infrared spectrum and zeta potential detection showed that the adsorption state of DT-2 on the bastnasite or gangue minerals was not electrostatic adsorption but chemical adsorption The results provide a theoretical basis for the application of DT-2 in the separation and purification of bastnasite.
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Key words:
- bastnasite /
- collector /
- adsorption mechanism
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表 1 氟碳铈化学多元素分析结果 /%
Table 1. Chemical element analysis of bastnasite
成分 La2O3 CeO2 Nd2O3 C TFe SiO2 CaO Al2O3 含量 23.50 33.10 6.72 5.39 0.74 0.32 0.16 0.04 表 2 方解石纯矿物化学元素分析结果 /%
Table 2. Chemical element analysis of calcite
成分 CaO SiO2 Al2O3 MgO TFe 含量 55.55 0.04 0.28 0.12 0.046 表 3 重晶石纯矿物化学元素分析 /%
Table 3. Chemical element analysis of barite
成分 BaO SiO2 CaO 含量 65.70 未检出 未检出 表 4 萤石纯矿物化学元素分析 /%
Table 4. Chemical element analysis of fluorite
成分 CaO F SiO2 Al2O3 TFe 含量 72.84 36.80 0.41 0.02 0.021 -
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