A novel method for purification of low grade diatomite powders in centrifugal fields

Sun, Zhiming, Yang, Xiaoping, Zhang, Guangxin, Zheng, Shuilin, & Frost, Ray L. (2013) A novel method for purification of low grade diatomite powders in centrifugal fields. International Journal of Mineral Processing, 125, pp. 18-26.

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Abstract

This study presented a novel method for purification of three different grades of diatomite from China by scrubbing technique using sodiumhexametaphosphate (SHMP) as dispersant combinedwith centrifugation. Effects of pH value and dispersant amount on the grade of purified diatomitewere studied and the optimumexperimental conditions were obtained. The characterizations of original diatomite and derived products after purification were determined by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (IR) and specific surface area analyzer (BET). The results indicated that the pore size distribution, impurity content and bulk density of purified diatomite were improved significantly. The dispersive effect of pH and SHMP on the separation of diatomite from clay minerals was discussed systematically through zeta potential test. Additionally, a possible purification mechanism was proposed in the light of the obtained experimental results.

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21 citations in Scopus
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20 citations in Web of Science®

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23 since deposited on 05 Dec 2013
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ID Code: 65157
Item Type: Journal Article
Refereed: Yes
Keywords: Diatomite, Centrifugal separation, Purification, Sodium hexametaphosphate
DOI: 10.1016/j.minpro.2013.09.005
ISSN: 03017516
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier B.V.
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Mineral Processing. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Mineral Processing, [Volume 125, (10 December 2013)] DOI: 10.1016/j.minpro.2013.09.005
Deposited On: 05 Dec 2013 23:20
Last Modified: 01 Dec 2016 15:51

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