Recovery of Fine Combustible Matter from Coal Washery Waste by Multi-Gravity Separator

剛, 平島; 泰雄, 久保; 勝彦, 鈴木

doi:10.2473/shigentosozai.121.456

Cited by 8 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yerriswamy et al (2003) enriched Indian fine coals with a Kelsey jig and researched the effects of jig operation parameters on enrichment. Hirajima, Kubo, and Suzuki (2005) investigated the effects of different operation parameters of MGS on fine coal enrichment in terms of clean coal ash and combustible efficiency; they obtained 18% clean coal with 57% combustible efficiency.…”

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

View full text Add to dashboard Cite

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

show abstract

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

View full text Add to dashboard Cite

show abstract

“…The development of new enhanced technologies has made it possible to utilize separation at ultra fine particle sizes. Among them are Mozley Multi Gravity separator, Knelson and Falcon concentrators (Rubiera et al , 1997;Koca et al, 2000;Çiçek at al., 2002;Honaker & Das, 2004;Hirajima et al, 2005;Honaker et al, 2005;Majumder & Barnwal, 2006;Majumder et al, 2007a;Majumder et al, 2007b;Menendez et al, 2007;Özgen et al,2009;Oney & Tanrıverdi, 2012;Boylu, 2013;Uslu et al, 2013;Sabah & Koltka, 2014;Boylu, 2014;İbrahim et al, 2014;Tozsin et al, 2016;Xiang-nan et al, 2016;Xiang-nan et al, 2017). This paper describes a study performed on the chemical, physical and mineralogical characteristics of fine coal tailings and investigates the optimum process flowsheet to concentrate fine clean coal from the Tunçbilek coal preparation tailings having particle size < 0.1 mm using gravity based processing methods.…”

Section: Introductionmentioning

confidence: 99%

Beneficiation of Fine Coal Tailings From Coal Preparation Plant by Enhanced Gravity Methods

Sabah¹,

Şapçi²

2018

Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi

View full text Add to dashboard Cite

In the past, it was more economical to dispose fine coal without utilization. Nowadays, beneficiation of fine coal is a necessity due to increasing costs of mining, tailings disposal and storage problems. This research contains experimental studies devoted to beneficiation of <0.1 mm coal preparation plant tailings of Garp Lignite Enterprises (Tunçbilek-Kütahya/Turkey). It was found from the characterization studies that the coal tailings include clay minerals (kaolinite, mica/illite, and smectite group), quartz, siderite, pyrite and dolomite which are of higher density than lignitic coal. Concentration processes are proposed as preliminary and final. In the preliminary two-stage processing tests, hydrocyclone is used to separate clay minerals associated with coal. For this purpose, structural and operating parameters of hydrocyclone (hydrocyclone diameter, vortex diameter, apex diameter, feed inlet pressure, pulp solids ratio) and of Falcon concentrator (gravity force, feed rate, pulp solid ratio and wash water pressure) are optimized, and their influences on separation efficiency were discussed. Under optimum conditions, a fine clean coal concentrate assaying 35.66% ash and 1.63% total sulfur at a recovery of 34.60% was obtained.

show abstract

“…13 Koca et al 14 17 enriched Indian fine coals with a Kelsey jig and investigated the effects of the jig operation parameters on enrichment. Hirajima et al 18 investigated the effect of operation parameters of MGS on fine coal enrichment in terms of clean coal ash and combustible efficiency. They obtained clean coal with 18% ash and a combustible efficiency of 57%.…”

Section: ■ Introductionmentioning

confidence: 99%

Separation Development Studies on the Beneficiation of Fine Lignite Coal Tailings by the Knelson Concentrator

Sabah

Koltka

2014

Energy Fuels

View full text Add to dashboard Cite

While disposing of fine coal without use was cheaper and more permissible previously, recovering some of the fine coal changes the mass balance of wastes and makes co-disposal or integrated dumps possible. The present study aims to investigate the processing of fine lignite coal tailings with 59.08% ash content from Soma tailings ponds in Turkey using a Knelson concentrator and to identify in both numerical and experimental methods the fundamentals of the reason why the Knelson concentrator must be operated in hindered settling conditions for high efficiency separation of high ash-bearing fine lignite coal tailings. 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 the Taguchi experimental design method, and the results were interpreted by the SPSS 17.0 program to evaluate the optimum parameter values. After the pre-enrichment process, a coal concentrate (42.60% ash, 0.71% total sulfur, and 3350 kcal/kg calorific value) was obtained with a 37.67% yield of coal using a 44 mm hydrocyclone. Under optimum conditions, an underflow product of hydrocyclone was reprocessed in the Knelson concentrator to reduce the coal ash content. The process yielded a coal product containing 30.51% ash and 4259 kcal/kg base calorific value with a separation efficiency of 19.50% using the Knelson concentrator. Without coal tailings being classified in hydrocyclone, better separation efficiency was achieved under the hindered settling conditions when direct feeding was made to the Knelson concentration at solids concentrations as high as 40%.

show abstract

Recovery of Fine Combustible Matter from Coal Washery Waste by Multi-Gravity Separator

Cited by 8 publications

References 3 publications

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

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

Beneficiation of Fine Coal Tailings From Coal Preparation Plant by Enhanced Gravity Methods

Separation Development Studies on the Beneficiation of Fine Lignite Coal Tailings by the Knelson Concentrator

Contact Info

Product

Resources

About