Application of coal gangue for Production of Superfine Calcined Kaolin
Kaolin, commonly known as china clay, has a variety of uses in many industries, from cosmetics to paper and pigment manufacture. Calcination, or the burning of kaolin, is a process used to remove impurities and modify key properties, such as changing the particle size and optimizing the optical characteristics. In traditional kaolin production, process heat is generated with the burning of fossil fuels, leading to high operational costs and significant environmental impacts.
Nowadays, coal gangue has become a popular alternative fuel source for the production of calcined kaolin. Coal gangue is a type of industrial waste that is produced during the processing of coal. It is composed mainly of silica, alumina, and other minerals. Coal gangue is relatively low in cost and has the ability to create a high temperature environment for calcining kaolin. This high temperature can help to optimize the optical and textural properties of the resulting kaolin, making it more suitable for use in industrial applications.
In recent years, researchers have been studying the application of coal gangue for the production of superfine calcined kaolin. Superfine calcined kaolin is a type of high-grade kaolin that is characterized by its extra-small particle size and optimal physical and chemical properties. Due to its superior characteristics, it is highly sought after for use in a variety of industries.
The process of producing superfine calcined kaolin using coal gangue starts with the removal of impurities, such as sulfur and ash, in the coal gangue. The gangue is then blended with kaolin to form a mixture. This mixture is then dried and heat-treated using a mixture of coal gangue, limestone, and soda. The heat-treatment process not only removes moisture from the kaolin, but also causes a chemical reaction between the minerals in the kaolin and coal gangue. This reaction forms a new mineral that helps to increase the particle size of the kaolin.
Once this heat treatment process is complete, the resulting material is then milled and air-classified to produce superfine calcined kaolin. The milled kaolin is then passed through an air classifier, which separates the fine particles from the larger ones. The fine particles are then collected and can be used directly or further processed to meet the need of specific application.
The use of coal gangue as an alternative fuel source in the production of supercalcified kaolin has many advantages. It is a low-cost alternative to traditional kaolin production, and its use can significantly reduce operational costs. In addition, it helps reduce the environmental impact of traditional kaolin production by reducing the amount of fossil fuels needed. Finally, the use of coal gangue can help optimize the physical and chemical characteristics of the resulting kaolin, making it more suitable for use in various industry applications.
Overall, the use of coal gangue for the production of supercalcified kaolin is a promising technology that provides many advantages over traditional kaolin production methods. By reducing costs and environmental impact, it can help to increase the economic viability of kaolin production and help ensure that this important resource is used in an ecologically responsible way.
