Magnesia Brick
Magnesia brick with periclase as the main phase (MgO≥95%, refractoriness ≥2000℃) offers outstanding resistance to basic slags and iron-oxide slag plus excellent high-temperature performance.
MgO Content≥95%
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Magnesia-Calcium Brick
Magnesia-calcium brick (MgO≥70%, CaO≥20%, refractoriness ≥1900℃) uses free CaO to absorb inclusions during refining, cleaning steel and improving cleanliness—the dedicated brick for refining ladles. For LF, VD and VOD ladle working linings and slag lines, and secondary refining ladle walls.
Technical Data
| MgO Content | ≥70% |
|---|---|
| CaO Content | ≥20% |
| Refractoriness | ≥1900℃ |
| CCS | ≥45 MPa |
Description
Magnesia-Calcium Brick
Material System & Positioning
Magnesia-calcium bricks are basic refractories with free CaO: MgO ≥70%, CaO ≥20%, refractoriness ≥1900℃ and CCS ≥45 MPa. Free CaO purifies molten steel by absorbing inclusions; carbon-free nature suits ultra-low-carbon steelmaking. It is Henan Songrui's professional grade for AOD/VOD refining vessels.
Key Performance
- Steel purification: free CaO absorbs inclusions.
- Carbon-free: suits ultra-low-carbon steels.
- Refining slag resistance: withstands AOD/VOD slags.
- High refractoriness: ≥1900℃.
Applications
- Steel & Iron: AOD/VOD working linings, ladle refining slag lines.
- Special steels: ultra-low-carbon and stainless refining.
Selection Advice
Use where refining slag matches and steel cleanliness matters; strict moisture protection, lay with magnesia-calcium mortar and put into service promptly after laying to prevent free-CaO hydration.
Installation & Maintenance
Strict moisture protection in storage and laying; heat up and use promptly after completion.
Quality Assurance
Henan Songrui New Refractory Materials Co., Ltd. (Xuanhua Town Industrial Park, Henan) is a 2024 Class A taxpayer and SRDI SME. For selection, quotation or installation, contact Manager Zheng (17513376789 / 17513376789@163.com).
Key Features
- Free CaO purifies molten steel during refining
- Adsorbs inclusions and improves steel cleanliness
- Resists AOD/VOD refining slag attack
- No carbon pickup for ultra-low-carbon steel
- Strictly dry; use magnesia-lime mortar
- Heat and commission soon after laying
Typical Applications
MgO-CaO brick purifies steel via free CaO—specialized for refining ladles:
- Steel & Iron: LF/VD/VOD refining ladle working liners and slag lines, ladle walls for secondary refining.
- Advantage: service up to 1750℃, free CaO absorbs S/P inclusions to purify steel, strong basic-slag resistance.
FAQs
Why does MgO-CaO brick purify steel?
Free CaO reacts with S, P and oxide inclusions to form low-density products that float out, purifying the steel.
Refining furnaces for MgO-CaO brick?
LF/VD/VOD refining ladle working liners and slag lines, especially for high-grade steels.
Does MgO-CaO brick hydrate?
Yes—CaO hydrates readily; keep dry during transport/storage, heat up promptly after installation.
Quotation & Custom Inquiry
Submit an inquiry or custom requirement for this product; reply within 24 hours
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