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High Purity Magnesia – Premium Basic Refractory Raw Material for High-Temperature Furnace Lining
1. Product Overview
High Purity Magnesia, also called high-purity dead burned magnesia or fused magnesia aggregate, is a core alkaline refractory raw material dominated by magnesium oxide (MgO). We supply multiple grades with MgO content ranging from 96% to 99.5%, including DBM96, DBM97, DBM98, DBM99 and ultra-high purity fused magnesia series.
It is produced from premium natural magnesite or refined seawater magnesium hydroxide, processed through impurity removal, briquetting and ultra-high temperature sintering above 1800℃, or electric arc fusion at over 2700℃. The finished material forms dense periclase crystalline structure with low impurities of SiO₂, CaO and Fe₂O₃, avoiding low-melting eutectic phases under high temperature. Compared with ordinary medium-grade magnesia, high purity magnesia features far stronger chemical stability and long service life under alkaline slag erosion environments, widely adopted for manufacturing magnesia bricks, magnesia-chrome bricks, refractory castables, magnesia mortar and other high-end refractory products.
2. Core Superior Performance
2.1 Ultra-High Refractoriness & Volume Stability
MgO owns a melting point up to 2800℃. High purity magnesia maintains stable volume without permanent creep deformation under long-term working temperature 1600–1800℃. Its refractoriness under load exceeds 1700℃, suitable for continuous high-temperature furnace operation.
2.2 Outstanding Resistance to Alkaline Slag & Alkali Vapor
As typical alkaline refractory raw material, it hardly reacts with molten steel slag, cement clinker, alkali vapor and basic molten medium. Low impurity content greatly reduces slag penetration rate, effectively preventing lining peeling, corrosion and furnace penetration failure, which is irreplaceable for severe alkaline corrosion zones.
2.3 High Bulk Density & Mechanical Strength
High sintered density and complete crystal bonding deliver high cold crushing strength and high-temperature flexural strength. Granule grading can be customized to meet production demands of dense refractory bricks and self-flow castables, lowering product apparent porosity and improving wear resistance against material scouring.
2.4 Customizable Granulation & Low Hydration Rate
We provide full-range particle sizes from fine powder to coarse aggregate. Strict high-temperature calcination suppresses hydration activity, convenient for long-term storage and mixing with various binders without quick agglomeration during construction. Good compatibility with alumina spinel, chrome oxide and zircon raw materials for composite refractory formulations.
2.5 Low Impurity & Stable Batch Consistency
Strict raw material purification and automatic batching control trace impurities. Each batch keeps stable chemical composition and physical indexes, avoiding performance fluctuation of finished refractory bricks and castables, fully meeting strict industrial furnace technical standards.
3. Main Application Fields
Steel Metallurgy Industry
Key raw material for EAF, ladle, AOD furnace, converter slag line magnesia bricks, magnesia-carbon bricks and furnace repair castables. Resists erosion of molten steel and alkaline steel slag, extends lining service life significantly.
Cement Rotary Kiln
Used for transition zone, burning zone and cooling zone magnesia-spinel bricks. Withstands high-temperature cement clinker corrosion and frequent temperature fluctuation, solves alkali kiln ring problems effectively.
Non-Ferrous Smelting Furnace
Lining raw material for copper, nickel, lead smelting reverberatory furnaces and refining furnaces, coping with high-temperature alkaline smelting slag erosion.
Glass & Petrochemical Thermal Equipment
Matches high-temperature refractory mortar and castable repair materials for API 560 gas-fired heaters, glass kiln regenerators and flue lining. Compatible with monolithic castable repairing works at 640℃–1300℃ working temperature.
Refractory Raw Material Processing
Raw material for manufacturing magnesia refractory brick, magnesia chrome brick, high-temperature magnesia castable, dry ramming mix and refractory joint mortar. Custom particle sizes available for customer independent refractory production.
Waste Hazardous Waste Incinerator
Serves as aggregate for alkaline anti-corrosion lining castables, resisting complex alkaline ash and flue gas corrosion in waste incineration furnaces.
4. Production & Quality Control
Our production adopts full automatic raw material sorting and multi-stage impurity removal process. Raw materials are calcined in large shaft kilns or fused by electric arc furnace with precise temperature control to form uniform dense crystals.
All finished high purity magnesia undergoes strict inspection before delivery: chemical composition analysis, bulk density test, apparent porosity, hydration rate and particle size grading test. Full inspection reports, MSDS and third-party certification can be provided upon request. Custom purity grades, particle size distribution and packaging solutions are supported according to clients’ technical evaluation and production formulas.
5. Packing & Delivery
Standard packaging adopts 25kg woven bags lined with plastic film, or 1000kg bulk jumbo bags on fumigated wooden pallets, covered by waterproof film to avoid moisture during sea transportation. We support flexible shipment terms including FOB, CFR and CIF, with stable stock for bulk orders and short lead time.
6. Technical Service Support
Our professional refractory technical team offers free technical datasheets, formulation suggestions and furnace lining matching schemes. We can quote unit price based on your required purity, particle size and monthly consumption. The exact order quantity can be confirmed after your technical evaluation of furnace working conditions and refractory formulas. Any technical consultation or customized index demand is welcome for timely reply.
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