Refractory high alumina silica brickis a set of refractory soils that are used in making ceramics, especially refractory bricksFire clay is a common, simple clay, but clay with a higher alumina (AL) content. It is usually whiter and lighter in color. White, yellowish, pink, light brown. It is also cheap like flowers. Suppliers of refractory or pottery sell it. Even if it is in dry powder form in bags, fire clay is still very heavy. If you buy clay in dry powder form, you only need one bag per dome. Usually, the amount of alumina in refractory soil is between 24% and 34% Al and silica between 50% and 60%.Fire clay often forms the bedrock layer below coal seams. Two types are known — flint clay, very hard, non-plastic, and similar in appearance to flint, which occurs in the United States. And plastic clay, the main use of refractory clay is in making refractory bricks and various side dishes such as bushes, stems, scissors, and glass vases, which are used in metalworking industries.All fire clay-based refractories contain alumina and silica. In fact, all firebricks resistant to high heat are made of fireclay.The chemical composition of firebrick includes 23% alumina and 73% silica. Iron oxide, titanium and other metal oxides make up the rest.
The main chemical composition of ordinary brick is silica, alumina, magnesium, lime, iron oxide and alkaline substances.Fire clay is resistant to high temperatures and has melting points above 1600°C (2910°F). Therefore, it is suitable for covering furnaces, as refractory bricks, and for making containers used in metalworking industries, such as crucibles, sargs, tanks, and glass containers. Quick-fired clay must be completely dry before it reaches steaming temperature. When baking without an oven, it may help to pre-dry the clay pieces in a 190°F kitchen oven. . Melting is one of the most important steps in making bricks. The required time varies from 40 to 150 hours depending on the type of furnace, type of clay, and other variables. Currently, tunnel furnaces and alternating furnaces are new types of furnaces that are used. In the tunnel kiln, the dried bricks pass on specially arranged wagons inside the tunnel and pass through the heating center and come out on the other side. It is taken out of the furnace uniformly after 6 hours (in other furnaces, the heat changes alternately. In this method, the clays are fixed and the heat source is variable). The fuel of this furnace is natural gas, oil or coal. Melting is one of the most important steps in making bricks. The required time varies from 40 to 150 hours depending on the type of furnace, type of clay, and other variables. 
Currently, tunnel furnaces and alternating furnaces are new types of furnaces that are used. In the tunnel kiln, the dried bricks pass on specially arranged wagons inside the tunnel and pass through the heating center and come out on the other side. It is taken out of the furnace uniformly after 6 hours (in other furnaces, the heat changes alternately. In this method, the clays are fixed and the heat source is variable). The fuel of this furnace is natural gas, oil or coal. . Materials made of temporary clay are completely melted at a temperature between 900 and 1100 degrees Celsius and the material acquires a stone structure. slow down In some of the new methods, in order to polish the surface of the brick, in the final stage, by injecting natural gas, the surface of the brick burns and changes color and becomes polished. To prevent cracking, the bricks are cooled slowly and after that the final control is done and if necessary for the uniformity of machining and then the high quality bricks are packed, stored or loaded. high alumina bricks specification The use of anti-aging materials requires knowing the various features and characteristics of these materials in the places of use. The diverse conditions of the application areas have complications that must be taken into account.
Chamouti products are the most widely used types of refractories that are used for most general purposes up to 1350 degrees Celsius and non-alkaline and acidic environments. These products are divided into two categories: bricks and special materials. According to the production process, firebricks are divided into machine-made bricks and handmade bricks. According to the structures, clay bricks can be divided into solid bricks and hollow bricks, and hollow bricks can be divided into load-bearing bricks and non-load-bearing bricks. Clay bricks are made in different shapes according to different needs. Fire clay brick is environmentally friendly and belongs to resource recycling bricks, so we can be sure to use clay bricks. Clay bricks are not harmful to our health. Fire clay brick has the advantages of fire resistance and heat insulation. Used clay bricks can be used as concrete to save a lot of resources. The price of firebrick is not as expensive as other firebricks. Light brick is more expensive than fire clay brick. In addition, clay bricks are very cheap and very durable Fire clay brick has good anti-moisture performance, it also has the advantages of fire insulation, heat insulation and moisture absorption.
Controlling the baking time in the kiln is very important, raw clay lacks the desired mechanical resistance, and if the brick is overheated, it changes its shape and cannot be used. In order to avoid cracking, the heat is slowly increased to 100 to 120 degrees Celsius. At this temperature, the free water of the clay evaporates and dries. After the clays are dried, the temperature increases rapidly from 5 to 700-800 degrees Celsius, and at this temperature the water of kaolin crystallization evaporates (dehydrates) and the clays find their maximum porosity at the temperature of 800-850 degrees Celsius. The melts are melted together with the clay and they surround the refractory components, and the length dimension of the clays decreases and the heated clay becomes a unified material. The main raw material of clay brick is soil, which harms the environment. Clay brick production easily leads to loss of soil and water. For this reason, in China, Kali bricks are gradually banned. Good penetration resistance and good erosion resistance.
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