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.
High alumina silica brick introduction
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%.
High alumina silica brick features
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).
herefore, 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.
High alumina silica brick advantages
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.
High alumina silica brick conclusion
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.