Removal and separation of iron and carbon from kaolin: A review

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-26 DOI:10.1016/j.powtec.2025.120939

Xiubin Wang , Yinan Xie , Qian Wang , Hongliang Shang , Zhicheng Hu , Jiangang Ku , Zhengchang Shen

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引用次数: 0

Abstract

Kaolin, a versatile material, is widely utilized owing to its distinctive mineralogical characteristics, mineral morphology, and chemical and physical properties. Whiteness, a critical factor in determining the commercial value of kaolin, is significantly influenced by its impurities. Consequently, impurity removal from kaolin has emerged as a primary research focus. These studies have concentrated on enhancing kaolin’s whiteness by optimizing critical parameters and employing innovative separation techniques. On this basis, this article reviews various methods for removing and separating iron (free and structural) and carbon impurities from kaolin, detailing the technical principles, optimizing parameters, and elucidating the mechanistic features of different beneficiation methods.In addition, this paper discusses the merits and limitations of these methods and proposes potential future research directions. This paper aims to guide the selection and development of strategies for kaolin purification and the decontamination of other clay minerals.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.