Study of cut point density and process performance of Floatex density separator in fine coal cleaning
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
View Archive Info| Field | Value | |
| Title |
Study of cut point density and process performance of Floatex density separator in fine coal cleaning
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| Creator |
Sah, Rakesh
Vidyadhar, A Das, Avimanyu |
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| Subject |
Minerals and Mining
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| Description |
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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| Publisher |
Taylor & Francis
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| Date |
2017
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://eprints.nmlindia.org/7735/1/PS%26T_2017.pdf
Sah, Rakesh and Vidyadhar, A and Das, Avimanyu (2017) Study of cut point density and process performance of Floatex density separator in fine coal cleaning. Particulate Science and Technology, 35(2) (IF-0.784). pp. 239-246. |
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| Relation |
http://dx.doi.org/10.1080/02726351.2016.1153545
http://eprints.nmlindia.org/7735/ |
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