Show simple item record

dc.contributor.authorHayat, M.B.
dc.contributor.authorDanishwar, M.
dc.contributor.authorHamid, A.
dc.contributor.authorZaid, M.M.
dc.contributor.authorEmad, M.Z.
dc.date.accessioned2021-06-17T01:09:46Z
dc.date.available2021-06-17T01:09:46Z
dc.date.issued2021
dc.identifier.citationHayat, M.B.; Danishwar, M.; Hamid, A.; Zaid, M.M.; Emad, M.Z. Quadratic Mathematical Modeling of Sustainable Dry Beneficiation of Kaolin. Minerals 2021, 11, 429.
dc.identifier.issn2075-163X
dc.identifier.doi10.3390/min11040429
dc.identifier.urihttp://hdl.handle.net/10150/659961
dc.description.abstractClay minerals are one of the most utilized minerals among non-metals. These are hydrous aluminum silicates with a layer (sheet-like) structure. Kaolin is a hydrous aluminosilicate mineral with a thin platelet structure. Kaolin is extensively used in paper, paint, and many other industries. Wet processing of kaolin will not be sustainable over the long term because global freshwater resources are becoming scarce. Hence, a process is necessary that does not consume water during the beneficiation of kaolin. This study developed a dry beneficiation process for low-grade kaolin of 59.6%, with 12% quartz and about 6% titaniferous impurities from Nagar Parkar, Sindh province, Pakistan. To develop a size difference between kaolinite and impurities, steel balls clad with rubber were used as the grinding media in a selective grinding unit. Screens of 60 and 400 mesh were employed to classify the feed of air classifier. Oversize +60 mesh was reground, 400 to 60 mesh fractions were sent to an air classifier, and −400 mesh was considered to be a product with the grade and recovery of 90.6% and 20.5%, respectively. Air classifier experiments were designed using central composite design. An experiment using a fan speed of 1200 rpm and a shutter opening of 4.0 showed optimum results, with maximum kaolinite grade and recovery of 91.5% and 35.9%, respectively. The statistical models developed for grade and recovery predicted the optimum results at a fan speed of 1251 rpm and shutter opening of 3.3 with the maximum kaolinite grade recovery of 91.1% and 24.7%, respectively. The differences between experimental and predicted grade and recovery were 0.1% and 2.4%, respectively. The characterization results showed the total upgrade of kaolin from 59.6% to 91.2%, with 27.1% recovery. The designed methodology has the potential to improve the yield of the product by focusing on its recovery. Furthermore, the designed process can be improved by using different sized balls in the selective grinding unit. This beneficiation process can utilize more than one air classifier in series to achieve the targeted results. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
dc.language.isoen
dc.publisherMDPI AG
dc.rightsCopyright © 2021 by the authors. This is an open access article distributed under the Creative Commons Attribution License.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAir classification
dc.subjectAttrition
dc.subjectBeneficiation
dc.subjectDifferential grinding
dc.subjectDry process
dc.subjectKaolin
dc.titleQuadratic mathematical modeling of sustainable dry beneficiation of kaolin
dc.typeArticle
dc.typetext
dc.contributor.departmentDepartment of Mining and Geological Engineering, The University of Arizona
dc.identifier.journalMinerals
dc.description.noteOpen access journal
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitleMinerals
refterms.dateFOA2021-06-17T01:09:46Z


Files in this item

Thumbnail
Name:
minerals-11-00429-v2.pdf
Size:
5.799Mb
Format:
PDF
Description:
Final Published Version

This item appears in the following Collection(s)

Show simple item record

Copyright © 2021 by the authors. This is an open access article distributed under the Creative Commons Attribution License.
Except where otherwise noted, this item's license is described as Copyright © 2021 by the authors. This is an open access article distributed under the Creative Commons Attribution License.