{"id":87807,"date":"2025-08-14T15:49:25","date_gmt":"2025-08-14T07:49:25","guid":{"rendered":"https:\/\/keruiref.com\/?p=87807"},"modified":"2025-08-14T15:54:39","modified_gmt":"2025-08-14T07:54:39","slug":"differences-between-light-burned-magnesia-and-dead-burned-magnesia","status":"publish","type":"post","link":"https:\/\/keruiref.com\/fr\/differences-between-light-burned-magnesia-and-dead-burned-magnesia\/","title":{"rendered":"Diff\u00e9rences entre la magn\u00e9sie calcin\u00e9e l\u00e9g\u00e8re et la magn\u00e9sie calcin\u00e9e morte"},"content":{"rendered":"

Lightly calcined magnesia (light-burned magnesia) and dead burned magnesia are both produced from magnesite, but they differ significantly in calcination temperature, physical properties, chemical reactivity, and applications<\/strong>.<\/p>\n

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1. Definition & Calcination Temperature<\/h2>\n
\n
\n\n\n\n\n\n\n\n
Objet<\/th>\nLightly Calcined Magnesia (Light-burned MgO)<\/th>\nDead Burned Magnesia (DBM)<\/th>\n<\/tr>\n<\/thead>\n
Calcination Temperature<\/strong><\/td>\n700\u20131000\u2103<\/td>\n1500\u20132000\u2103<\/td>\n<\/tr>\n
Main Purpose<\/strong><\/td>\nRemove crystal water and CO\u2082, decompose magnesite to produce high-activity MgO<\/td>\nHigh-temperature sintering to reduce reactivity, increase density, and improve refractoriness<\/td>\n<\/tr>\n
Appearance<\/strong><\/td>\nWhite or light yellow powder<\/td>\nGray-white or gray-yellow blocks or granules<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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2. Physical & Chemical Properties<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n
Property<\/th>\nLightly Calcined Magnesia<\/th>\nDead Burned Magnesia<\/th>\n<\/tr>\n<\/thead>\n
Activity<\/strong><\/td>\nHigh (>40% citric acid activity)<\/td>\nLow (<5% citric acid activity)<\/td>\n<\/tr>\n
Hardness<\/strong><\/td>\nSofter, easy to grind<\/td>\nVery hard, high density<\/td>\n<\/tr>\n
Densit\u00e9 en vrac<\/strong><\/td>\n1.0\u20132.0 g\/cm\u00b3<\/td>\n3.3\u20133.45 g\/cm\u00b3<\/td>\n<\/tr>\n
Stabilit\u00e9 chimique<\/strong><\/td>\nLower, easily reacts with water and acids<\/td>\nVery high, excellent resistance to acids, alkalis, and high-temperature corrosion<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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3. Main Applications<\/h2>\n

Lightly Calcined Magnesia:<\/strong><\/p>\n