Parametric Evaluation of a Dense-Medium Process Using an Enhanced Gravity Separator

Honaker, R.Q.; Patil, D. P.

doi:10.1080/07349340210505

Cited by 13 publications

(7 citation statements)

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“…Therefore, the flotation is the one favored for the removal of inorganic sulfur and efficient alternative flotation devices are being designed. Most fine coal beneficiation devices, such as multi-g separator, falcon, knelson, altair, and kelsey jig, utilize centrifugal forces (Beniuk et al, 1994;Honaker and Patil, 2002;Honaker and Das, 2004). This trend also manifests itself in the flotation process, and flotation machines produced in the authors' century are designed in such a way as to create a centrifugal field.…”

Section: Introductionmentioning

confidence: 98%

Pilot-scale Studies of Ash and Sulfur Removal from Fine Coal by Using the Cylojet Flotation Cell

Hacıfazlıoğlu

Toroğlu

2014

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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This article presents the results of pilot-scale studies of ash and sulfur removal from a Turkish coal by using the cyclojet flotation cell. The cyclojet cell, which was developed by H. Hacifazlioglu and I. Toroglu in 2006, utilizes an alternative jet flotation technique. Apart from being based on the working principle of jet flotation, the cyclojet cell incorporates centrifugal forces into the flotation process, thus providing an excellent separation for ash and pyritic sulfur removal. The most important parameters for the removal of ash and pyritic sulfur in the cycojet cell are the length of the conical jet, frother type, wash water rate, and froth thickness. With decreasing the conical jet length and increasing the wash water rate and froth thickness, there is an increase in the removal of pyritic sulfur. On the other hand, the frothing agents MIBC produced better results in terms of pyritic sulfur removal in the cyclojet cell. Under optimal conditions, the cyclojet cell removed 61.25% of the pyritic sulfur and 73.98% of the ash with a combustible recovery value of 71.10% without any need for a depressant.

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Section: Introductionmentioning

confidence: 98%

Pilot-scale Studies of Ash and Sulfur Removal from Fine Coal by Using the Cylojet Flotation Cell

Hacıfazlıoğlu

Toroğlu

2014

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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“…Rubiera, Hall, and Shab (1997) flotation, a Knelson concentrator and ahydrocyclone to remove pyrite from fine coal, and identified flotation as the most effective way to remove sulfur. Mohanty and Honaker (1999) and Cowburn et al (2005) used Jameson flotation cells to enrich fine coal, Honaker and Patil (2002) used a heavy media drum and optimized the parameters required for enrichment. Honaker, Das, and Nombe (2005) used a Knelson concentrator to enrich fine coal with 18% ash and obtained clean coal with 80% efficiency and 8% ash content.…”

Section: Introductionmentioning

confidence: 99%

Modeling and optimization of fine coal beneficiation by hydrocyclone and multi-gravity separation to produce fine lignite clean coal

Özbakir

Koltka

Sabah

2016

Particulate Science and Technology

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We evaluated the suitability, contribution to the national economy, and environmental impact of hydrocyclone and Multi-Gravity Separation (MGS) processes using fine-sized coal taken from Downloaded by [The University Of Melbourne Libraries] at 22:43 22 June 2016 2 the Soma coal sludge pond. The lignite coal tailings were treated by a two-stage concentration scheme for the recovery of fine clean coal. Pre-enrichment experiment parameters were determined by Taguchi experimental design method, and the results were interpreted by SPSS 15.0 program to evaluate the optimum parameter values. The tailings initially contained 54.82%ash and had a LCV of 2,279 kCal/kg; after hydrocyclone pre-enrichment, the concentrate was 42.60% ash and had a calorific value of 2,573 kcal/kg (55.75% coal yield).After the final enrichment process, the ash of the pre-concentrated coal was decreased to 24.21% and left a clean coal with a base calorific value of 3,226 kcal/kg (36.16% coal yield). The total sulfur of the obtained clean coal was 0.52% and the combustible sulfur rate was 0.10%. To reduce the ash content of the obtained clean coal, a decantation process was performed that decreased the ash

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“…These techniques achieve concentration of mineral particles based on superimposing the rotational fields on a conical bowl along vertical axis for rotation and a drum with horizontal axis for rotation. A large number of studies and literature have been devoted to clean fine coal and other minerals by using enhanced gravity separation Luttrell et al 1995;Honaker et al 1996;Falconer 2003;Honaker and Patil 2002;.…”

Section: Introductionmentioning

confidence: 99%

Separation of Pyritic Sulfur from Egyptian Coal Using Falcon Concentrator

Ibrahim

Anadoly

Farahat

et al. 2014

Particulate Science and Technology

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Pyritic sulfur separation of El-Maghara coal ore was studied using Falcon concentrator model SB40-VFD as an enhanced centigugal gravity separator. The coal sample was ground to below 100 mm to reach liberation between pyrite and coal. Optimization of the separation process has been studied using central composite rotatable design (CCRD) and response surface method (RSM). The studied working factors were the back-water pressure (psi) and rotation frequency (Hz) and their interactions, where the feeding rate and pulp density were kept constant through all experiments. A model describing the relation between pyritic sulfur separation efficiency percentage and the previously mentioned operating variables and their interactions, have been designed. Results showed that maximum separation efficiency reached 70.61%, with decreasing total sulfur, and pyritic sulfur contents reaching 1.72% and 0.48% from original assays reaching 2.90% and 1.60%, respectively. That maximum separation efficiency was attained at 78.38 Hz rotation frequency (rotor speed 2282 rpm, 300 g) and 3.90 psi back-water pressure. The amenability of pyritic sulfur separation from the Egyptian coal using Falcon concentrator are determined. Technical difficulties within the separation process are highlighted.

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Parametric Evaluation of a Dense-Medium Process Using an Enhanced Gravity Separator

Cited by 13 publications

References 0 publications

Pilot-scale Studies of Ash and Sulfur Removal from Fine Coal by Using the Cylojet Flotation Cell

Pilot-scale Studies of Ash and Sulfur Removal from Fine Coal by Using the Cylojet Flotation Cell

Modeling and optimization of fine coal beneficiation by hydrocyclone and multi-gravity separation to produce fine lignite clean coal

Separation of Pyritic Sulfur from Egyptian Coal Using Falcon Concentrator

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