High Quality Calcined Kaolin Aggregate Raw Materials for Refractory Brick Castable

Calcined Kaolin Raw Materials

Introduction

Calcined Kaolin Material (also called Kaolin Clay or Chamotte) is an essential industrial mineral primarily made up of the mineral kaolinite – a hydrous aluminum silicate. it's a kind of aw meal homogenizing silo, Kaolin can be found in applications all around us, from consumer products, to advanced industrial processing. It is also widely used in refractories field. Used throughout a variety of industries to cause physical changes and chemical reactions within a material, calcination is recognized as one of the best ways to improve the natural properties of kaolin, making it whiter and more chemically inert. 

Calcined Kaolin (Chamotte) is considered an important constituent in the Alumina refractories manufacturing. Refractories are those heat-resistant materials which maintain their chemical and physical properties under thermal pressure and a high temperature (up to 3000° C).

The formation of Kaolin clays is (Al₂O₃·2SiO₂·2H₂O) = 3Al₂O₃·2SiO₂ + 4SiO₂ + 6H₂O , which have alumina (Al₂O₃) contents of around 20% up to 45.9% for theoretically pure kaolin.  In general terms, the higher the alumina content the more refractory the material.  

The iron and steel industry is by far the leading consumer of refractories. There is a growing trend to replace traditional clay refractories with newer products that use chrome, graphite, and zirconia, and hence there is unlikely to be substantial market growth in the future. Exports for this item are good.

Properties

l   Chemistry: In its natural mineral state, kaolin’s chemical formula is Al₂Si₂O₅(OH)₄. Kaolinite is an aluminum silicate mineral that develops through chemical weather of aluminum rich feldspars contained in granites and pegmatites.

l   Structure: Kaolin composition consists of hexagonal crystals ranging in size from 0.1 to 10 micrometers. These crystals form in stacked layers, and this kaolinite structure partially gives the clay its desirable properties.
Due to kaolin’s chemical and structural composition, its natural properties are highly desirable for industrial uses.

l   Chemically inert: Kaolin has a neutral pH level, making it ideal for use in pharmaceuticals, cosmetics, and industrial mixtures because it doesn’t alter the product’s chemical composition, or promote bacterial growth.

l   Adsorbent: One of kaolin clay’s primary uses is to aid in the adsorption of other substances. Kaolin clay is naturally highly adsorbent, so it can help extract and remove undesirable impurities, pathogens or other substances in any given mixture or application.

l   Non-swelling: Between each layer of kaolinite crystals are hydrogen bonds that prevent water molecules from infiltrating the layers. This ability to prevent water from penetrating kaolin’s crystal structure gives it non-swelling properties. Non-swelling is a valuable property of additives like kaolin, so they don’t alter the physical properties of the mixture or product in question.

Parameters of Different Raw materials

Application :

? Cement refractories,

? Refractory crucibles,

? Industrial ceramics,

? Graphite foundry accessories, and

? Refractory monoliths.

Package

 1 ) . In 1MT Big Bag
 2 ) . 25KG PP Bag, Bag In 1MT Big Bag
 3 ) . customized packing as required