Evaluation and Application of Spirals and Water-only Cyclones in Cleaning Fine Coal

Mikhail, M W; Salama, A. I. A.; Parsons, I S; Humeimiuk, O. E.

doi:10.1080/07349348808960514

Cited by 8 publications

(2 citation statements)

References 2 publications

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“…The above analysis would suggest that the slurry volume to product would not change but RD50 would increase, leading to the above result. Mikhail et al [10] found that if the solids content of the feed is held constant then the separation density increases as shown in Figure 4. Holland-Batt [6] indicated that there is a performance envelope that is greatly affected by slurry density and control should be achieved by combining slurry density with solids flow rate.…”

Section: Unit Operationsmentioning

confidence: 90%

Fine Coal Measurement Needs for Improved Control

Firth

O’Brien

2010

International Journal of Coal Preparation and Utilization

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The monitoring and management of fine coal circuits in coal preparation plants is limited in current practice. As part of the Australian Coal Association Research Program (ACARP) ''Intelligent Plant Project'' (C11069), the relationships between the main operational and control factors for the unit operations and the circuit and the performance indicators have been identified. The unit operations examined included desliming (hydrocyclones and sieve bends), small coal cleaning (spirals and hydraulic separators), flotation, and dewatering (vacuum filters, centrifuges, and thickeners). These relationships were then used to assist in the identification of the important parameters to be measured and the preferred level of accuracy required to be useful. An important issue was the interconnection between the various unit operations and the potential impact of an upstream problem on the subsequent performance of downstream units. Analysis with the relationships showed that the flow rate of respective feed slurries and the solids content were found to be

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Section: Unit Operationsmentioning

confidence: 90%

Fine Coal Measurement Needs for Improved Control

Firth

O’Brien

2010

International Journal of Coal Preparation and Utilization

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“…Efforts have been made to investigate the application of water-only cyclones in cleaning fine coal [9]. Mikhail found that cut-point control is easy to achieve in the cyclone, particularly for coarser particles.…”

Section: Introductionmentioning

confidence: 99%

The Beneficiation of Fine Coal by a Combination of Three-Product Cyclone and Fine Screen

Yuan

et al. 2016

International Journal of Coal Preparation and Utilization

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A novel classified gravity system, comprised of a three-product cyclone and a fine high-frequency screen, was developed and tested for recovery of fine coal. The three-product cyclone is characterized by the primary cylinder and a secondary cyclone. The effects of major parameters of the secondary cyclone, such as vortex finder diameter, vortex finder length, and spigot diameter, were investigated by single-factor experiments. Regression models of the yield and ash content of clean coal were developed with statistical design of experiments and showed good correlations of experimental results. The regression models indicated that the spigot diameter had the largest impact on the yield and ash content of clean coal. It also indicated that spigot diameter and vortex finder diameter jointly affect performances of the three-product cyclone. The cylinder played a significant role in desliming of the feed, giving the secondary cyclone a better gravity-separation condition. Ash reductions of +0.150 mm fractions were all above 70%, which showed that the cyclone had significant effects on fine coal separation in the classified gravity system. ARTICLE HISTORY

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