Recovering Carbon from Korean Anthracite by Hindered-Settling Separation

Cho, Heechan; Kim, Jeongyun

doi:10.4144/rpsj.51.52

Cited by 7 publications

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“…The fluidized bed gravity separator is preferred because of its ability to treat material in the size range 0.12-3.0 mm at lower-density cut points compared with the other available separators. Efficacy of hindered settling separation in combustible recovery from Korean anthracite was studied by Cho and Kim (2004). They concluded that with an increase in both the teeter water flow rate and the bed pressure, recovery increased without much deterioration in the product quality.…”

Section: Introductionmentioning

confidence: 98%

Study of cut point density and process performance of Floatex density separator in fine coal cleaning

Sah¹,

Vidyadhar²,

Das³

2016

Particulate Science and Technology

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Advanced gravity separation of a high-ash (36%) semi-coking coal in a Floatex density separator (FDS) is investigated. The influence of the operating variables on the separation features has been identified. It is established that a higher bed pressure and a higher teeter water flow rate enhance the mass yield of the clean coal albeit with a poorer grade. A higher bed pressure reduces the bed voidage leading to a higher cut point density. Although bed voidage is reduced due to higher teeter water rate, the hydraulic transport increases significantly. A higher pulp density and a higher feed rate introduce severe hindered settling conditions leading to an increase in the cut point density. This results in a poorer product grade with a higher yield. The optimum condition for 23% product ash in a single-stage operation is identified. The yield at the optimum condition is found to be 64.3% which is close to the theoretical maximum for this coal. The dependence of the cut point density as well as Ecart probable (Ep) value on the operating variables is quantified. A specific gravity of separation of below 1.8 and an Ep value of around 0.15 is achievable under controlled operation of the FDS.

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Section: Introductionmentioning

confidence: 98%