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-Chrome Brick
Magnesia-chrome brick (MgO≥60%, Cr₂O₃≥12%, refractoriness ≥1900℃) with magnesia-chromite spinel structure resists attack by high-temperature slags and melts with high hot strength and washout resistance.
Technical Data
| MgO Content | ≥60% |
|---|---|
| Cr₂O₃ Content | ≥12% |
| Refractoriness | ≥1900℃ |
| CCS | ≥40 MPa |
Description
Magnesia-Chrome Brick
Material System & Positioning
Magnesia-chrome bricks are basic refractories of magnesia and chrome ore bonded by magnesia-chrome spinel: MgO ≥60%, Cr₂O₃ ≥12%, refractoriness ≥1900℃ and CCS ≥40 MPa. Strong resistance to high-temperature slag and melt, high hot strength and erosion resistance suit copper/nickel smelters and RH refining vessels. Supplied by Henan Songrui with environmental-compliant use and recycling.
Key Performance
- Spinel structure: strong resistance to hot slag and melt.
- High hot strength: suited to prolonged molten metal/slag contact.
- Erosion resistance: stable dense structure.
- Critical hot zones: copper/nickel smelters, RH vessels.
Applications
- Non-ferrous: copper flash smelters, nickel smelters, lead-zinc hot zones.
- Steel & Iron: RH vessels, ladle refining zones.
- Cement: burning zones (chrome option, compliance assessment required).
Selection Advice
Chrome materials face environmental restrictions—verify local regulations; use chrome-free spinel alternatives where required. Lay with magnesia-chrome mortar, tight joints.
Installation & Maintenance
Lay with matching mortar; dispose of spent bricks per environmental requirements. Compliance advice and installation guidance available.
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
- Magnesia-chrome spinel structure resists hot slag and melt
- High hot structural strength and erosion resistance
- Critical lining for Cu/Ni smelting and RH vessels
- For long contact with molten metal and slag
- Use and recycle per environmental rules
- Use magnesia-chrome mortar with tight joints
Typical Applications
Mag-chrome brick excels in the most aggressive zones:
- Non-ferrous: copper flash smelter settler and reaction shaft, converters, nickel flash furnaces.
- Steel & Iron: RH lower vessel, ladle slag lines (partial).
- Cement: rotary kiln burning zones (still used in some regions).
- Advantage: service up to 1750℃, extreme slag resistance; chrome content faces environmental limits and is being replaced by magnesia-spinel.
FAQs
Is mag-chrome brick still usable?
Usable in extreme zones (flash smelters, RH), but hexavalent chrome raises environmental concerns—magnesia-spinel recommended for new plants.
Applications?
Copper settler, converters, nickel flash furnaces, RH vessels.
Temperature rating?
About 1750℃ with extreme hot strength and slag resistance.
Quotation & Custom Inquiry
Submit an inquiry or custom requirement for this product; reply within 24 hours
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Magnesia-carbon brick bonds magnesia with graphite (MgO≥76%, C 14-18%, 1750℃ max). Carbon does not wet slag, giving exceptional slag-line erosion resistance and thermal-shock stability far better than burned magnesia brick.
MgO Content≥76%
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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.
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