What is magnesium oxide?
Magnesium oxide spans a calcination spectrum from reactive caustic calcined to dense dead burnt and fully fused. Learn the types (MgO 85–99%), their uses in cement, refractories and steel, and how to specify.
Magnesium oxide (MgO) is produced by calcining magnesite at different temperatures, and the firing temperature decides what the material does. We cover the full range and where each type belongs.
The calcination spectrum
Caustic calcined magnesia (CCM, ~700–1000 °C) is chemically reactive — used for magnesium cement, flue gas desulphurisation and animal feed. Dead burnt magnesia (DBM, above 1600 °C) is dense and stable, the base aggregate for magnesia-carbon bricks and monolithic refractories. Electro-fused magnesia (above 2800 °C) has the largest crystals and the best slag resistance.
Our magnesia products run MgO 85–99% depending on type and grade.
How to specify
Tell us the application (refractory, steel, cement, environmental or feed) and the required MgO and reactivity, and we will recommend CCM, DBM or fused. We also supply magnesium sulphate heptahydrate and monohydrate for agriculture and industry.
Specify by MgO content, reactivity/sintered state and particle size; we will match the grade.
Need a custom specification?
Tell us your target mesh size, whiteness and application. We send samples and a quotation within 24 hours.