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The improvement in whiteness index of calcite tailings using attrition-scrubbing process.

Authors :
Wongkaewphothong, Bancha
Kertbundit, Chinawich
Srichonphaisan, Palot
Julapong, Pongsiri
Homchuen, Peet
Juntarasakul, Onchanok
Maneeintr, Kreangkrai
Tabelin, Carlito Baltazar
Numprasanthai, Apisit
Saisinchai, Somsak
Phengsaart, Theerayut
Source :
Separation Science & Technology; 2023, Vol. 58 Issue 11, p2077-2085, 9p
Publication Year :
2023

Abstract

Calcium carbonate (CaCO<subscript>3</subscript>) is an essential mineral critical for various applications in many industries like plastic, rubber, paint, and paper manufacturing. However, salable CaCO<subscript>3</subscript> products need to meet specific requirements. For the paint and paper manufacturing industries, the whiteness index (WI) of CaCO<subscript>3</subscript> is an important property because it strongly influences the final color of paper and paint products. In this study, the effects of retention time and pulp density on the WI after attrition-scrubbing of calcite tailings were investigated. To increase the whiteness index, an attrition scrubber was used to remove impurities on the CaCO<subscript>3</subscript> surface with different pulp densities—40, 45, 50, 55, 60, and 70% solids—and retention time—10, 15, 20, and 25 min—as process variables. The results of laboratory-scale experiments found that the attrition-scrubbing process improved the whiteness index of CaCO<subscript>3</subscript> tailings and reduced its iron content. The optimum condition was at the pulp density of 55% solids, which was used in the pilot-scale experiments. The results of the pilot-scale tests were consistent with the laboratory-scale, indicating that the attrition-scrubbing process can be used to improve the quality of CaCO<subscript>3</subscript> tailings. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01496395
Volume :
58
Issue :
11
Database :
Complementary Index
Journal :
Separation Science & Technology
Publication Type :
Academic Journal
Accession number :
167303210
Full Text :
https://doi.org/10.1080/01496395.2023.2219380