A Comparative Experimental Analysis of the Effect of Spiral Geometry on the Separation of Fine Chromite Particles. Part 1: Potential Downstream Impacts

IF 1.5 4区工程技术 Q3 METALLURGY & METALLURGICAL ENGINEERING

Mining, Metallurgy & Exploration Pub Date : 2024-08-30 DOI:10.1007/s42461-024-01063-6

Damla Izerdem

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Abstract

This study focuses on examining the separation performance of spirals employed in a classified fine-sized (− 200 + 2 5 µm) chromite ore. Dwindling global reserves of high-grade chromium ores and dispersing minerals in the form of fine particles make it attractive to find alternative and efficient methods for enriching these minerals in an economically as well as environmentally sustainable manner. Experimental tests were conducted on three spiral concentrators with distinct geometries. The effects of pulp density, flowrate, and splitter blade positions on the separation efficiency and enrichment ratios were thoroughly examined. The separation variables were comparatively assessed, and response surface method (RSM) was employed for optimization. The results indicated that optimal separation performance was achieved using a small diameter spiral (Ø: 60 cm), whereas the least effective separation occurred in a large diameter spiral (Ø: 100 cm) with a lower pitch angle. The findings revealed that high flowrates and pulp densities adversely affected the separation efficiencies, and the positions of the splitters significantly impacted the quality of the obtained products.

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螺旋几何形状对细小铬铁矿颗粒分离效果的对比实验分析。第 1 部分：潜在的下游影响

本研究的重点是考察螺旋分离机在分级细粒度（- 200 + 2 5 µm）铬铁矿中的分离性能。全球高品位铬矿石和细颗粒分散矿物的储量不断减少，因此，寻找经济上和环境上可持续的富集这些矿物的高效替代方法很有吸引力。对三种不同几何形状的螺旋选矿机进行了实验测试。深入研究了矿浆密度、流速和分流器叶片位置对分离效率和富集比的影响。对分离变量进行了比较评估，并采用响应面法（RSM）进行优化。结果表明，使用小直径螺旋（直径：60 厘米）可获得最佳分离效果，而使用大直径螺旋（直径：100 厘米）且螺距角较小，则分离效果最差。研究结果表明，高流速和纸浆密度会对分离效率产生不利影响，而分流器的位置则会对所得产品的质量产生重大影响。

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来源期刊

Mining, Metallurgy & Exploration Materials Science-Materials Chemistry

CiteScore

3.50

自引率

10.50%

发文量

177

期刊介绍： The aim of this international peer-reviewed journal of the Society for Mining, Metallurgy & Exploration (SME) is to provide a broad-based forum for the exchange of real-world and theoretical knowledge from academia, government and industry that is pertinent to mining, mineral/metallurgical processing, exploration and other fields served by the Society. The journal publishes high-quality original research publications, in-depth special review articles, reviews of state-of-the-art and innovative technologies and industry methodologies, communications of work of topical and emerging interest, and other works that enhance understanding on both the fundamental and practical levels.