Dolomite bricks are a type of refractory brick that are primarily composed of dolomite, a mineral composed of calcium magnesium carbonate (CaMg(CO3)2). These bricks are known for their high refractoriness and resistance to thermal shock. Here's what you need to know about dolomite bricks:
Composition: Dolomite bricks are composed mainly of dolomite, along with a small amount of other additives and bonding agents. Dolomite is a double carbonate of calcium and magnesium.
High-temperature resistance: Dolomite bricks exhibit excellent high-temperature resistance. They can withstand temperatures up to 1800°C (3272°F) or even higher, depending on the specific composition and manufacturing process.
Thermal stability: Dolomite bricks have good thermal stability. They can withstand thermal cycling and rapid heating and cooling without significant expansion or contraction, minimizing the risk of thermal stress and cracking.
Resistance to thermal shock: Dolomite bricks have good resistance to thermal shock, which is the ability to withstand sudden temperature changes without cracking or spalling. This property is particularly important in applications where rapid heating or cooling occurs.
Chemical resistance: Dolomite bricks have good resistance to basic slags and alkalis. They are suitable for applications where exposure to alkaline environments is expected.
Low thermal conductivity: Dolomite bricks have relatively low thermal conductivity, which helps to reduce heat transfer through the brick and improve energy efficiency in high-temperature applications.
Application versatility: Dolomite bricks find applications in various industries, including steelmaking, cement, ceramics, and lime kilns. They are used in furnaces, kilns, ladles, and other high-temperature equipment where excellent refractory properties are required.
Maintenance considerations: Dolomite bricks can be prone to hydration and spalling when exposed to water or moisture. Therefore, proper storage and handling practices are essential to maintain their performance and prevent degradation.
 
Buy low cost high performance Dolomite Bricks made from magnesite and dolomite burned at high temperature or ultra-high temperatures. They can be applied in AOD Furnaces and VOD refining furnace.
 
Item
MGM-MD20
MGM-MD30
MgO%
75-79
65-69
CaO%
18-22
28-32
Apparent Porosity %≤
8
8
Cold Crushing Strength MPa ≥
50
55
Refractoriness Under Load ℃≥
1700
1700