Basically, magnesite synthetic sinters products consist of low iron and boron during the manufacture of magnesite. The categorization and use are characteristic of additive, temperature, chrome and SiO2/CaO ratios. Their prominent feature is the resistance to basic alkali oxides and slags. Some of the common uses of magnesite bricks are in furnaces in the non-ferrous metal industry and glass smelting furnaces.
The application of these refractories is dependent on the type of magnesite brick. That is, there are different types of magnesite bricks each with prominent features that make them a better alternative for the particular use when held against other alternatives. What are some of the different types of magnesite bricks and what are their applications?
Burned Magnesite Bricks
In this type of refractory bricks, magnesia is used as the main raw material. They are characterized by high slag resistance and temperature performance.
Application: They are used as a lining in steel converters, EFAs, glass regenerators, lime kilns, non-ferrous furnaces, and torpedo cars.
Fused magnesite bricks
Fused bricks use magnesia fused under high pressure to give it the standard shape as the formation technique. Additionally, they are fired under ultra-high temperatures before finally being treated using post technical treatment. They are characterized by good hydration resistance and high bulk density.
Application: Fused magnesite bricks are used as a lining on the tapping hole of converters with slag of severe corrosion properties. Moreover, they are used in chimneys of glass tanks, nonferrous slag tanks, and metal mixer furnaces.
Magnesite Alumina Bricks
Magnesite alumina bricks are made through a series of processes. They are made from high-quality alumina bauxite and magnesia, with phases of spinel and periclase. They are characterized by good high-temperature performance, slag resistance, and high RUL performance.
Application: Some of the applications of magnesite alumina bricks are as permanent linings in the steel furnaces, for
steel ladles, and iron mixers.
Magnesite chrome bricks
This is one of the commonly used https://refractoriesmaterials.com/magnesite-bricks/. They mainly consist of three types:
Ordinary Magnesite Chrome Bricks
They are made from sintered chrome ore and magnesia. They are characterized by high thermal resistance and high bulk density.
Application: Some of the applications include glass kiln, cement rotary kilns, and refining ladles.
Directly bonded magnesite chrome bricks
They are made from high-quality magnesia and low-quality chrome ore. Afterward, they are fired at a temperature of over 1700 Degrees. Their prominent feature is the ability to withstand high slag and temperatures.
Applications: They are used in electric furnaces, non-ferrous metal kilns, and cement rotary.
Semi bonded and rebounded magnesite chrome bricks
They are made from fused magnesia shaped under extreme pressure then fired at very high temperatures. They are characterized by high-temperature resistance, low air-permeability, and high slag resistance.
Applications: They are used in the tapping apparatus of AOD furnaces, lining of high-temperature furnaces, and vacuum chambers. The semi bonded refractory bricks are made from fused magnesia chrome. It offers better resistance to corrosion resistance and thermal shock resistance.
All in all, magnesite refractories are used in basic open-hearth furnaces. From electric, steel-making, wall and bottom furnaces. Their applications are extensive and extend to use in metallurgy furnaces, tunnel kilns and lining of rotary kilns. Get more info from here: https://refractoriesmaterials.com/