Deadburned magnesia (DBM), also known as 'sinter' and, in the Far East, 'clinker' magnesia, has recently seen a trend towards consolidation in DBM production, with refractory producers worrying about securing captive DBM sources, as well as highlighting the need for DBM producers to develop higher grades to meet the stringent requirements of refractory producers. The sources of DBM are either natural or synthetic. Most natural DBM is made directly from sintering magnesium carbonate (MgCO_3) in rotary furnaces - the production method used by Slovenske Magnezitove Zarody (SMZ), Grecian Magnesite, Magnesitas Navarras and Kumas; or in shaft kilns, the route used in China,and by Magnesita, Ma'aden and Kumas's Bommag.
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