CaO MgOCalcium and magnesium oxide or calcined dolomite
are obtained from dolomitic minerals such as calcium carbonate and magnesium Ca Mg (CO3) 2, through the calcination process.
MANUFACTURING PROCESSKnowledge and technology
Calcined Dolomite is an Oxide of Calcium and Magnesium (CaO & MgO) mainly used as a flux in iron and steel industries. Calcined Dolomite play important role in purifying the liquid metal along with increasing the life of refractory linings.
CaCO3 + MgCO3 + Heat → CaO + MgO
Calcined Dolomite is manufactured from high-grade dolomite stone mined from our own mines. Dolomite stone contains calcium and magnesium carbonates (Caco3+ Mgco3). The Dolomite Stone is burned at high temperatures in a rotary kiln (which is known as calcination).
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Calcined dolomite is found in applications in the iron and steel industry, such as in scorifiers and refractory lining protectors, in agriculture as a soil conditioner and in the environmental sector in water treatment, among others.
APPLICATIONCALCINED DOLOMITE APPLICATION SECTORS
IRON AND STEEL INDUSTRY
The main uses of dolomite in iron and steel industry are as a fluxing material for protection of refractory lining.
GLASS AND CERAMICS
For the production of E-glass, C-glass or ECR-glass - increase the performance and capacity of glass melting tanks for glass fibres.
METALLURGY
In steel making calcined dolomite would be used as flux and in iron making dolomite would be used for production of fluxed sinter.
REFRACTORY
Calcined dolomite is used both as a refractory product in granular form to repair linings and for making the bricks used in the refractory linings of casting ladles and cement kilns.
LIVESTOCK FARMING
The high calcium and magnesium content make calcium carbonate and dolomite important components in animal feed.
ANIMAL FEED
Animals need calcium carbonate for bone development, nerve function and to produce milk and eggs.
SLUDGE TREATMENT
It has great potential in ammonium and phosphate precipitation from agricultural sludges and the precipitates could be used as recycled fertilizers.
WATER TREATMENT
It has great potential in ammonium and phosphate precipitation from synthetic waters and the precipitates could be used as recycled fertilizers.
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LIST OF ALLFrequently Asked Questions
What is calcined dolomite?
Calcined dolomite is obtained by the calcination of dolomite, with a high content in calcium and magnesium carbonate CaMg(CO3)2. It has mainly steel applications to improve slagging and to lengthen the lifespan of the refractory linings of ovens and ladles.
What happens when dolomite is calcined?
Calcination of dolomite involves heating the raw material at sufficient temperature in order to release the carbon dioxide from its carbonate minerals. This process is commonly conducted in a rotary kiln.
What is burnt dolomite?
Burnt dolomite for the metallurgical industry is a product from natural dolomite burnt in a shaft kiln. Its main components are calcium and magnesium oxides occurring at an almost stoichiometric ratio. A high reactivity is achieved by a special “soft burning” method.
Products
Dolomite
Calcined dolomite
Sintered dolomite
Magnesium ingot
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