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dc.contributor.authorSherrell, Ian Michaelen_US
dc.date.accessioned2014-03-14T20:36:15Z
dc.date.available2014-03-14T20:36:15Z
dc.date.issued2001-03-22en_US
dc.identifier.otheretd-05112001-144405en_US
dc.identifier.urihttp://hdl.handle.net/10919/32562
dc.description.abstractA vast majority of coal and mineral cleaning and upgrading processes involve the addition of water. The water allows the movement of particles throughout the processing plant and the upgrading of the material. When the process is complete the finished product must be dewatered. This is due to storage concerns, in which the water takes up a majority of the space, and high transportation costs, in which no compensation is obtained from the buyer for the shipment of the liquid. Dewatering is accomplished by many devices, with the two most common pieces of equipment being the screen-bowl centrifuge and disk filter. This thesis tests and compares the effect of reagents on dewatering using the screen-bowl centrifuge and disk filter. Coal was obtained from the Upper Banner, Pittsburgh No. 8, Taggart, and Dorchester seams, crushed and ground to the desired size, and run through the dewatering circuits. The results showed that the moisture content of the product can be greatly reduced in the disk filter while being only slightly reduced in the screen-bowl centrifuge. It was also shown that the recovery can be slightly increased in the screen-bowl centrifuge. Overall, with the addition of reagents, the disk filter outperformed the centrifuge in both recovery and moisture content. A model was also developed for the screen-bowl centrifuge. The results from the screen-bowl tests helped in the development of this model. This model can be used to predict the moisture content of the product, the recovery, particle size distribution of the effluent and particle size distribution of the product. The model also predicted how the product moisture and recovery were affected by changing the feed flow rate, feed percent solids, centrifuge speed, and particle size distribution.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartSherrell-thesis.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectscreen-bowl centrifugeen_US
dc.subjectdewateringen_US
dc.subjectcoalen_US
dc.subjectdisk filteren_US
dc.subjectreagentsen_US
dc.subjectmodelen_US
dc.titleParameter Evaluation and Modeling of a Fine Coal Dewatering Screen-Bowl Centrifugeen_US
dc.typeThesisen_US
dc.contributor.departmentMining and Minerals Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMining and Minerals Engineeringen_US
dc.contributor.committeechairLuttrell, Gerald H.en_US
dc.contributor.committeememberAdel, Gregory T.en_US
dc.contributor.committeememberYoon, Roe-Hoanen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05112001-144405/en_US
dc.date.sdate2001-05-11en_US
dc.date.rdate2002-05-24
dc.date.adate2001-05-24en_US


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