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Effects of grinding and dehydration on kaolin in a steam jet mill

Published online by Cambridge University Press:  17 May 2021

Zhe Wang
Affiliation:
School of Environment and Resource, Southwest University of Science and Technology, Mianyang621010, China
Hong Li
Affiliation:
School of Environment and Resource, Southwest University of Science and Technology, Mianyang621010, China Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang621010, China Sichuan Provincial Engineering Lab of Non-Metallic Mineral Powder Modification and High-Value Utilization, Southwest University of Science and Technology, Mianyang621010, China
Haiyan Chen*
Affiliation:
School of Environment and Resource, Southwest University of Science and Technology, Mianyang621010, China Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang621010, China Sichuan Provincial Engineering Lab of Non-Metallic Mineral Powder Modification and High-Value Utilization, Southwest University of Science and Technology, Mianyang621010, China
Juan Lv
Affiliation:
School of Environment and Resource, Southwest University of Science and Technology, Mianyang621010, China
Hao Leng
Affiliation:
School of Environment and Resource, Southwest University of Science and Technology, Mianyang621010, China
Junhui Xiao
Affiliation:
School of Environment and Resource, Southwest University of Science and Technology, Mianyang621010, China Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang621010, China Sichuan Provincial Engineering Lab of Non-Metallic Mineral Powder Modification and High-Value Utilization, Southwest University of Science and Technology, Mianyang621010, China
Shuai Wang
Affiliation:
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang621010, China School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
*

Abstract

Steam jet milling was applied for the first time to ultra-fine grind the filter cake (moisture content 23.80%) produced by a kaolin concentrator. The material was dehydrated and dried simultaneously during grinding, and the final ground sample met the moisture content requirement for powder products of <2%. The particle size of the ground kaolin samples decreased and the particle-size distribution was more concentrated, indicating that the steam jet milling was more effective for kaolin processing than the conventional dry grinding process. In addition, steam jet milling can improve the whiteness and decrease the crystal order of the samples, thus improving the kaolin properties in follow-up applications.

Type
Article
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland

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Footnotes

Associate Editor: Saverio Fiore

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