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Stage-Optimized Intensification of Spiral Separation: Process Deconstruction and a Novel Spiral Separator Design

Mingsheng Xia, Guichuan Ye

2026Englishmineral processingbeneficiationcomminutionflotationphysical separationspiral separator

Abstract

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The dynamic migration of mineral particles within spiral separators and its control via structural parameters are not yet fully understood, hindering efficiency improvements. To this end, a set of spiral separators with systematically adjusted structural parameters was designed. Extensive sampling of a 1–0.25 mm coal slurry yielded 120 samples from 6 separators, across 5 turns and 4 radial streams. Sink-float analysis revealed a well-defined three-stage separation mechanism: the roughing stage involves rapid segregation of light and heavy particles, while intermediate-density particles remain widely distributed; the intensified cleaning stage governs the radial migration of intermediate-density particles while simultaneously enriching the high-density and low-density fractions; and the final cleaning stage stabilizes the particle distribution and redirects misplaced particles. The influence of key structural parameters was also quantified: the composite cross-section outperformed cubic parabolic and elliptical profiles, markedly enhancing the separation of high-density and medium-high-density particles from the lighter product; increasing the trough inclination angle significantly promoted the radial inward migration of medium-high-density particles.

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Cite This Work

@article{fc4e69d1-f4d9-4470-83d0-a1c72d5325a6,
  title={Stage-Optimized Intensification of Spiral Separation: Process Deconstruction and a Novel Spiral Separator Design},
  author={Mingsheng Xia and Guichuan Ye},
  year={2026},
  language={English}
}
TY  - JOUR
TI  - Stage-Optimized Intensification of Spiral Separation: Process Deconstruction and a Novel Spiral Separator Design
AU  - Mingsheng Xia
AU  - Guichuan Ye
PY  - 2026
LA  - English
ER  -

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