Removal of Rich Fluid Inclusions in Vein Quartz by Combined Collector Flotation and Its Mechanism Analysis
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摘要:
高纯石英砂中的流体包裹体限制了其应用领域。以非洲某地区脉石英为研究对象，开展了浮选富流体包裹体石英颗粒研究。通过DECA（双极端对比）检测法进行流体包裹体定量分析，发现不同粒级石英砂通透石英颗粒占比不同，故仅针对−0.20+0.106 mm粒级石英砂进行浮选实验。结果表明：在pH为9.5，BQY+HQY组合捕收剂用量为80+160 g/t时，精矿石英中通透颗粒占比为65.46%，较原矿提升20.46百分点，扫选精矿中通透颗粒占比较原矿提升10.08百分点，并且精矿中Al、Fe、K、Ca元素含量与原矿相比，分别降低了9.74%、13.68%，18.63%以及18.96%。由红外光谱与能谱分析可知，BQY与HQY药剂之间的协同作用使得通透石英更易浮出。此外，浮选精矿制备的玻璃体气泡含量较原矿显著减少，证明浮选对富流体包裹体石英颗粒实现有效去除。
Abstract:The fluid inclusions in high purity quartz sand limit its application. Quartz veins from a certain region in Africa as the research object, and flotation experiments were conducted on quartz particles with rich fluid inclusions. Quantitative analysis of fluid inclusions was conducted using DECA (Double Extreme Case Analysis) method, and it was found that the proportion of transparent quartz particles varied among different particle sizes of quartz sand. Flotation experiments were conducted on quartz sand with particle sizes of −0.20+0.106 mm. The results showed that when the pH was 9.5, the combined collector of BQY+HQY were 80+160 g∙t−1, the proportion of transparent particles in the quartz concentrate was 65.46%, with an increase of 20.46 percentage points compared to the original ore. The proportion of transparent particles in the scanned concentrate increased by 10.08 percentage points compared to the original ore. Moreover, the content of Al、Fe、K、Ca elements in the concentrate decreased by 9.74%, 13.68%, 18.63%, and 18.96% compared to the original ore. According to infrared spectrum and energy spectrum analysis, the synergistic effect between BQY and HQY agents makes it easier for transparent quartz to float out. In addition, the bubble content in the quartz glass prepared before and after flotation had changed. It also further proves that flotation had the significant removal effect on rich fluid inclusion quartz particles.
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Key words:
- vein quartz /
- flotation /
- fluid inclusions /
- combination collector /
- quartz vitreous body
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表 1 原矿化学成分分析
Table 1. Chemical composition analysis of raw ore
/(μg·g−1) 元素 Al Ca Cu Fe K Li Mg 含量 154.12 32.22 0.43 44.34 61.40 1.53 26.2 元素 Ni Mn Na B Ti 合计 SiO2 含量 0.01 0.82 13.70 0.33 7.40 342.57 99.96* 注：*代表百分含量。 
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表 2 不同药剂用量下的精矿产率与通透颗粒占比
Table 2. Concentrates yield and percentage of transparent particles under different
总用量/(g∙t−1) 精矿产率/% 通透颗粒占比/% BQY+HQY =80+160 10.50 65.21 BQY+HQY =160+160 28.20 50.38 BQY+HQY =240+160 34.30 48.30 BQY+HQY =160+80 20.57 57.65
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表 3 不同浮选产物表面原子占比
Table 3. Surface atomic percentage of different flotation products
/% 样品 Si O Al Ca Na Cl K S 总量 谱图1（浮选精矿） 27.37 61.99 0.55 2.32 5.73 − 0.28 − 100 谱图2（浮选精矿） 13.22 58.67 0.38 1.59 11.73 11.02 1.75 1.65 100 谱图3（浮选槽内） 28.47 71.21 − 0.32 − − − − 100 谱图4（浮选槽内） 22.57 73.96 − 3.47 − − − − 100
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