Show simple item record

dc.contributor.authorLe Roux, M.
dc.contributor.authorCampbell, Q.P.
dc.contributor.authorVan Rensburg, M.J.
dc.contributor.authorPeters, E.S.
dc.contributor.authorStiglingh, C.
dc.date.accessioned2016-08-15T12:11:08Z
dc.date.available2016-08-15T12:11:08Z
dc.date.issued2015
dc.identifier.citationLe Roux, M. et al. 2015. Air drying of fine coal in a fluidized bed. Journal of the Southern African Institute of Mining and Metallurgy, 115(4):335-338. [https://doi.org/10.17159/2411-9717/2015/v115n4a10]en_US
dc.identifier.issn0038-223X
dc.identifier.issn2411-9717 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/18242
dc.identifier.urihttps://www.saimm.co.za/Journal/v115n04p335.pdf
dc.identifier.urihttps://doi.org/10.17159/2411-9717/2015/v115n4a10
dc.description.abstractThe demand for energy has continued to rise worldwide in line with population growth. The majority of South Africa’s electricity is supplied by coal-fired power stations. The amount of fine coal (-2 mm) generated at coal processing plants has increased, due mainly to mechanized mining methods. Fine coal retains more water, which lowers its heating value. Drying the coal is costly and it is difficult to achieve the required moisture content. Consequently, coal fines are often discarded. An estimated 8% of the total energy value of mined coal is lost1. Fluidized bed technology is often used to dry coal thermally, but this method is expensive and has an adverse environmental impact. The objective of this study was to investigate the removal of moisture from fine coal (<2 mm) in a fluidized bed operated with dry fluidizing air at moderate temperatures as the drying agent. The effects of different air temperatures and relative humidity levels were investigated in a controlled environment. The study further investigated the influence of coal particle size on moisture removal. The drying rate was found to increase with increasing temperature. The relative humidity of the drying air had a more pronounced effect on the drying rate, even at temperatures as low as 25°C.. It became more challenging to remove moisture as the particle size decreased. The gain in calorific value was greater than the energy required to dry the coal samples, showing that a fluidized bed using moderately warm dry air is an energy-efficient drying technology. The energy efficiency of the fluidized bed compared favourably with other thermal drying methodsen_US
dc.description.sponsorshipCoaltech; NRF (National Research Foundation), South Africaen_US
dc.language.isoenen_US
dc.publisherSAIMMen_US
dc.subjectcoal finesen_US
dc.subjectdryingen_US
dc.subjectfluidized beden_US
dc.subjectenergy efficiencyen_US
dc.titleAir drying of fine coal in a fluidized beden_US
dc.typeArticleen_US
dc.contributor.researchID12413887 - Le Roux, Marco
dc.contributor.researchID10192247 - Campbell, Quentin Peter
dc.contributor.researchID21089906 - Van Rensburg, Martha Johanna
dc.contributor.researchID21683883 - Peters, Elmarie Sunette
dc.contributor.researchID22791310 - Stiglingh, Christel


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record