ABSTRACT

In this study, we investigated the effect of the scrubbing medium’s particle size distribution on the scrubbing flotation performance of microcrystalline graphite. A simplex lattice mixture design approach using Design-Expert software was employed for proportioning testing of the scrubbing media. Three different sizes of scrubbing medium (A: 1 mm, B: 2 mm, and C: 3 mm) were mixed to obtain different particle size distributions. The results showed that a linear mixture model was suitable for fitting this mixture design, and the particle size distribution of the scrubbing medium was 3 mm. Hence, we studied the effect of scrubbing time on the flotation performance of the scrubbing flotation process. The flotation results indicated that graphite quality was enhanced by increasing the scrubbing time, and the optimum scrubbing time for this graphite was 45 min when maximum enrichment efficiency was acquired. Also, we investigated the effect of the scrubbing medium’s particle size compositions on gangue entrainment in the scrubbing flotation process. It was concluded that the degree of entrainment under the composition of scrubbing size 1 mm (16.67%), 2 mm (16.67%), and 3 mm (66.66%) was reduced compared to the other two compositions (scrubbing size 2 mm (50%) and 3 mm (50%) as well as scrubbing size 3 mm (100%)). This conclusion was proved using analyses of froth bubble size and scanning electron microscopy and energy dispersive x-ray spectroscopy (SEM-EDS).

摘要

在这项研究中，我们研究了洗涤介质的粒度分布对微晶石墨洗涤浮选性能的影响。使用 Design-Expert 软件的单一晶格混合物设计方法用于洗涤介质的比例测试。将三种不同尺寸的洗涤介质（A：1 毫米、B：2 毫米和 C：3 毫米）混合以获得不同的粒度分布。结果表明，线性混合模型适合拟合该混合设计，洗涤介质的粒径分布为3 mm。因此，我们研究了洗涤时间对洗涤浮选工艺浮选性能的影响。浮选结果表明，石墨质量随着洗涤时间的增加而提高，当获得最大富集效率时，该石墨的最佳洗涤时间为 45 分钟。此外，我们研究了洗涤介质的粒度组成对洗涤浮选过程中脉石夹带的影响。得出的结论是，与其他两种组合物（擦洗尺寸 2 mm（50 %) 和 3 mm (50%) 以及擦洗尺寸 3 mm (100%))。使用泡沫气泡尺寸和扫描电子显微镜和能量色散 X 射线光谱 (SEM-EDS) 分析证明了这一结论。我们研究了洗涤介质的粒度组成对洗涤浮选过程中脉石夹带的影响。得出的结论是，与其他两种组合物（擦洗尺寸 2 mm（50 %) 和 3 mm (50%) 以及擦洗尺寸 3 mm (100%))。使用泡沫气泡尺寸和扫描电子显微镜和能量色散 X 射线光谱 (SEM-EDS) 分析证明了这一结论。我们研究了洗涤介质的粒度组成对洗涤浮选过程中脉石夹带的影响。得出的结论是，与其他两种组合物（擦洗尺寸 2 mm（50 %) 和 3 mm (50%) 以及擦洗尺寸 3 mm (100%))。使用泡沫气泡尺寸和扫描电子显微镜和能量色散 X 射线光谱 (SEM-EDS) 分析证明了这一结论。