Refractory chrome magnesite Firebrick is widely used in high temperature industrial furnaces. Refractories are solid materials that can withstand high temperatures and maintain their physical performance in any condition, even in contact with corrosive liquids or gases. Firebrick is essential for all high temperature processes, such as the production of metals, cement, glass and ceramics. Currently, there are different types of refractory materials that are designed and produced to meet the needs of different industrial sectors. Refractories can be classified in a number of ways, the most common of which are based on the method of installation, type of joint (tempered, fired) and chemical composition (acidic, basic or neutral). Refractories, or firebricks, are pressed into a predefined geometry and installed as such, while refractories, which are usually prepared in powder form, are compacted during installation by pouring, troweling, pelletizing, Shake and inject into a powder. In the group of refractories, a further distinction can be made between ceramic bricks and carbon bond. Bonded or fired bricks are formed at high temperature (1500°C) using temporary adhesives and firing process, while bonded or tempered bricks are formed at lower temperatures (300°C) using adhesives. Hydrocarbon (resin, oil, etc.) 
and final resistance is created during in situ firing. Classification of firebrick goes back to its main raw material. Currently, manufacturers use many materials to produce refractory bricks, such as alumina silicate, silica, and zircon, which are usually used at low temperatures. In addition, basic refractories, including magnesia, dolomite, and spinel, are often combined with carbon and graphite and are used in very basic environments. They can withstand the highest operating temperatures but are subject to hydration and therefore require proper maintenance. The structure of these types of bricks can be different according to the request of the companies, and the process of shaping and baking at high temperature is removed. One of the advantages of amorphous refractories is its easy manufacturing process and no need for expensive equipment and machinery. The materials of this type of brick are magnesite or Mgo, as the name of this type of brick indicates, alkaline brick consists of non-acidic oxides and has a very good resistance to high temperature and chemical wear. This type of brick is used in steel industries and furnaces. Due to the low price of making this type of brick, it is one of the most widely used refractory bricks: of course, the thermal conductivity and expansion of this type of brick is lower than other refractory bricks, but its reasonable price has made this type of brick to be used in many industries. This type of brick is made of silica refractory stones and about 93% of this brick is silicon oxide (SIO2). 
These refractories are considered acid refractories and can withstand temperatures up to 1700 degrees Celsius, and due to their good resistance to heat, they can be used in many industries such as cement industries. Also, this type of brick has a much better performance against dust and soot, and the only weakness of this brick is its lack of resistance to alkaline When choosing firebricks for your industrial activities, special care should be taken to ensure that acidic and alkaline materials are kept apart because at high temperatures these two react with each other and form salts, which reduces The effect of inflammable materials.environments. To buy refractory bricks, you must have a complete understanding of the characteristics of each brick in the market. In general, the advantages of these types of bricks can be listed as follows. sand lime bricks uses is best. The thermal conductivity of ordinary bricks is much higher than refractory bricks. Firebricks can withstand high temperatures because materials such as ceramics, ferric oxide and other chemical additives do not absorb and transmit high temperatures. Low thermal conductivity makes firebricks a good option for wall insulation and provide more insulation than ordinary bricks. Due to high heat absorption and low thermal conductivity, refractory bricks have become a suitable option for places such as furnaces, cement industries and steel industries. Being denser, more resistant to wear and damage are among the characteristics of firebrick. 
sand lime bricks pros and cons
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 a general survey, the most widely used refractories worldwide are fire clays (46%) and magnesium-based refractories (26%). Refractory clays are used in a wide range of applications and industries. While magnesium refractories are very important for the steel industry and it is used in making refractory bricks for steel furnaces. Although dolomite makes up a small percentage of bricks worldwide (3%), it is strongly associated with the stainless steel industry, where dolomite refractories largely replace magnesium-chromium bricks. 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. In magnesite-chromite refractory bricks, the presence of chromium next to magnesia increases the flexibility of the brick and thus increases its immunity against the stresses and thermal shock. 
However, the silicate connection creates limitations for refractory bricks, in terms of thermomechanical and chemical aspects. Magnesite-chromite bricks are divided into three groups, which are the same in terms of chemical composition and are transformed into each of the groups only under non-uniform firing conditions Refractory bricks are composed of a chemical composition of 23% aluminum and 73% silica. Ferric oxide, titanium and other metal oxides make up the remaining ingredients of firebricks. But the main composition of ordinary bricks is silica, alumina, magnesia, lime, iron oxide and alkaline materials, and if any of these ingredients are combined more or less than the specified amount, serious problems will arise for the structure of the bricks.The importance of material composition in ordinary bricks is generally less than in refractory bricks.