Dolomite Refractory Bricks

Dolomite refractory bricks are made of magnesium oxide, about 30%-42%, calcium oxide, about 40%-60%, and other materials, and the main minerals are periclase and the calcium stone. Such products are featured with high refractoriness, good thermodynamic stability, and slag erosion resistance. And can be used in the converter, steel making furnace and sintering zone as well as transition zone of the cement rotary kiln, etc.
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 Dolomite Bricks Specification



Chemical property (%) MgO≥ 87 80 80 75 60 70 75
CaO≥ 5 10 15 20 35 20 15
S+A+F≤ 2 2 2 1.5 1.8 SiO26 SiO25
Apparent porosity (%) ≤ 18 18 18 20 18 18 18
Bulk density (g/cm3) ≥ 2.95 2.95 2.95 2.9 2.95 2.95 2.95
Cold crushing strength (Mpa) ≥ 50 50 50 50 50 50 50
Refractoriness under load (0.2Mpa 0.6% 0C) ≥ 1680 1680 1700 1700 1700 1680 1680

Burnt Dolomite Bricks Components

Dolomite brick is a kind of refractory products that is made from calcined dolomite sand. Generally speaking, the content of the calcium oxide is more than 40%, and that of magnesium oxide is 35% above. In addition, there are materials such as aluminium oxide and iron oxide. Dolomite brick can be divided into asphalt combined unburnt brick, light-burned impregnated brick, and burned impregnated dolomite brick according to the production technology.

China is rich in dolomite resource with excellent quality. Except the natural dolomite, synthetic dolomite sand made by seawater and lime milk can also be made into dolomite brick. Dolomite brick can be classified into unstable type and stable type. The former contains free calcium oxide, and it is easy to be hydrated split. While the later contains no free lime, with characters of good slag resistance.


  • Magnesium oxide: 30%-42%
  • Calcium oxide: 40%-60%
  • Periclase
  • Calcium stone
  • Iron oxid



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Fired Dolomite Bricks Properties

Dolomite refractory belongs to basic refractory material, which is resistant to erosion of basic slags and iron slags, with high refractoriness. And with high quality magnesite and dolomite as raw materials, and two-step calcining process, being made by high temperature sintering, dolomite bricks are excellent in high heat conditions such as high temperature resistance, good thermodynamic stability, slag erosion resistance, good cold crushing strength, and thermal shock resistance. In addition, dolomite bricks have advantages of forming stable kiln coating, because it is resistant to corrosion of the cement clinker, thus reducing thermal loss, saving energy, and improving economic benefit.

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  • Resistant to erosion of basic slags and iron slags
  • High refractoriness
  • Excellent in high heat conditions such as high temperature resistance
  • Good thermodynamic stability
  • Good cold crushing strength
  • Good thermal shock resistance, etc.


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Dolomite Bricks Uses

Dolomite bricks can be used in the following parts:


  • Basic and oxygen converter lining
  • Steel making furnace
  • Ladles, and cupola
  • Ling, sintering and transition zone of the cement rotary kiln
  • Electric furnace lining
  • AOD furnace, and VOD furnace, etc.


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Dolomite Bricks Manufacturers

Zhengzhou Rongsheng Kiln Refractory Co. Ltd, is a professional dolomite bricks manufacturer. It is located at the foot of Mount Song, a place fulling of natural refractory materials resources. Besides the natural advantages, it is neighboring Zhengshao Expressway and at the transportation hub, near Longhai and Jingguang railway lines. Plus 20 years’ of hardworking and development, RS has established cooperative relations with multiple scientific research institutesit, and now it has become a comprehensive enterprise producing refractory materials in metallurgy, nonferrous metals, building materials, electric power, petrochemical and other industries.

With professional sales and after-sales service team, RS offers consumers all-around services in applications, construction and installation, operation and technical training, etc. Its products has exported to Russia, South Africa, Kazakhstan, Philippines, Chile, Malaysia, Uzbekistan, Indonesia, Vietnam, Kuwait, Turkey, Zambia, Peru, Mexico, Qatar, etc.

Rongsheng Refractory Materials Factory

Rongsheng Refractory Bricks Factory
Rongsheng Refractory Bricks Factory
Rongsheng Monolithic Refractory Materials Plant
Rongsheng Monolithic Refractory Materials Plant

Rongsheng Refractory Materials Products

Its major business are shaped,  unshaped refractory materials, insulation refractory materials, such as insulation fibers and refractory balls, etc.

Shaped Refractory Products

High alumina refractory bricks

Silicon bricks

Fireclay refractory bricks

Magnesia bricks

Mullite bricks, etc.

refractory materials for sale

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Unshaped Refractory Products

Refractory castable

Refractory mortar

Acid resistant concrete

High alumina cement

Calcined bauxite aggregate , etc.

refractory mortar fireplace

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Insulation refractory materials

Insulation bricks

Refractory blanket

Refractory board and rope

Insulation castable

Refractory balls, etc.

fireproof insulation materiasl price

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Strict quality management system: it works according to the standard of ISO9001 from the materials, producing to the testing. Professionals strictly check at every process. So RS can provide the superior dolomite refractory bricks to the customers.

Rongsheng has always been adhering to the business purpose of honesty, respect, innovation, and dedication. It will persist the strategic developing road based on quality and cheap to establish its own brand-RS Dolomite Bricks.

Buy dolomite bricks from RS, we assure you the superior quality, professional services, and  timely delivery, by natural resources, sound customer information management system, and convenient transportation.

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