- Deadburnt Magnesia
During sintering (firing) at temperatures of 1,750-2,000 C° in shaft or rotary kilns naturally occuring magnesium carbonate is converted into sintered magnesia, directly (one-step calcination process) or via caustic calcined magnesia (two-step).
Based on the lack of reactivity (e.g. with water, acids etc.) the commonly used term is deadburnt magnesia.
Due to its heat resistant and insulating properties deadburnt magnesia (same as electrofused magnesia) is ideally suited to the production of highest quality refractory products. Deadburnt magnesia is a basic component for the production of formed and unformed refractory products; bricks, prefabricated shapes, masses and mortars for application e.g. in steel or cement production processes.
In addition to production processes based on natural magnesium carbonate there are also manufacturing methods based on chemical precipitation from seawater or brine.
Major countries of origin presently are:
Our delivery program includes different grades and qualities in terms of
- MgO purities
- Composition of minor chemical components
- mineral phases (forsterite, dicalciumsilicate etc.)
- Low- or high iron contents
- Natural or synthetic
- Periclase crystal size
- Grain size, fineness
Furthermore, Deadburnt Magnesia is used for the thermal insulation (e.g. in heating conductor elements).