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Direct-Bonded Fused Magnesia Chromite Brick (MGe16) - High-Temp Resistant For Cement Kilns & Extreme Industrial Scenarios
Our Direct-Bonded Fused Magnesia Chromite Brick is a premium refractory material crafted from high-purity fused magnesia (MgO 65%-85%) and chrome ore via direct bonding sintering. It features exceptional high-temperature stability (refractoriness 1770-2000℃), strong corrosion resistance (against cement clinker and molten slag), and reliable mechanical strength (cold crushing strength ≥55MPa). Designed to solve pain points like short service life of ordinary bricks in cement kilns, easy erosion from alkaline slag, and poor structural stability at ultra-high temps, it’s widely used as lining material for cement kiln burning zones, non-ferrous metal smelting furnaces, and glass melting furnaces. Backed by ISO 9001, CE, and TüVRheinland certifications, plus 3000 tons monthly capacity, we offer factory-direct pricing ($270-$800/ton) and full customization to meet global high-end refractory demands.
Description
1. Product Overview
This Direct-Bonded Fused Magnesia Chromite Brick is manufactured via advanced processes: first, high-purity magnesia is fused at 2800℃ to form dense fused magnesia grains (reducing porosity); then, it's mixed with graded chrome ore (controlling Cr₂O₃ content for corrosion resistance) and trace additives (CaO ≤1.2% to optimize bonding); next, high-pressure shaping (1500-2000 tons press) ensures bulk density ≥3.0g/cm³; finally, high-temperature sintering (1700-1800℃) achieves "direct bonding" between magnesia and chrome grains-forming a dense, corrosion-resistant structure. Unlike traditional magnesia chrome bricks, its direct bonding structure eliminates weak intermediate phases, reducing slag penetration by 40% and extending service life to 18-24 months (2x longer than ordinary bonded bricks). The product is supplied in standard size (e.g., 230×114×65mm) with fumigated wooden pallets (930×930mm, 1.5-2.0 tons/pallet) and supports custom shapes for irregular kiln structures.
2. Key Features
Ultra-High Temp Resistance: Refractoriness 1770-2000℃, refractoriness under load (0.2MPa) ≥1600℃-withstands long-term operation in cement kiln burning zones (1500-1600℃) without softening or deformation.
Strong Slag Corrosion Resistance: MgO 65%-85% + low apparent porosity (17%-18%)-resists alkaline cement clinker and molten slag erosion; direct bonding structure blocks slag penetration, avoiding brick peeling or cracking.
High Mechanical Strength: Cold crushing strength ≥55MPa, flexural strength ≥8MPa-resisting impact from kiln rotation and material charging, brick breakage rate ≤2% during transportation and installation.
Stable Volume & Thermal Shock Resistance: Reheating linear change ≤0.5% (1600℃, 3h), thermal expansion coefficient 8.5×10⁻⁶/℃-withstands frequent temperature fluctuations (1600℃→room temp) without structural damage.
Cement Kiln Specialization: Brown color, optimized composition (SiO₂ 3.8%-4.2%, Al₂O₃ 4.5%-6%)-matches cement kiln alkaline environment, reducing clinker contamination and improving cement quality.
3. Technical Parameters
| Parameter | Specification |
|---|---|
| Product Model | MGe16 |
| Main Composition | MgO 65%-85%, SiO₂ 3.8%-4.2%, Al₂O₃ 4.5%-6%, CaO ≤1.2%, CrO=0 |
| Refractoriness | 1770-2000℃ (High Refractory) |
| Refractoriness Under Load (0.2MPa) | ≥1600℃ |
| Bulk Density | ≥3.0g/cm³ |
| Apparent Porosity | 17%-18% |
| Cold Crushing Strength | ≥55MPa |
| Flexural Strength (1100℃) | ≥8MPa |
| Reheating Linear Change (1600℃, 3h) | ≤0.5% |
| Working Temperature | ≤1600℃ |
| Color | Brown |
| Standard Size | 230×114×65mm, 230×114×75mm (customizable) |
| MOQ | 1 ton (standard); 10 tons (custom shape) |
4. Application Scenarios
Cement Industry: Cement kiln burning zones and transition zones-resists alkaline clinker erosion, extends kiln maintenance cycle to 18-24 months (vs. 12 months for ordinary bricks).
Non-Ferrous Metal Smelting: Copper/nickel smelting furnace linings-high MgO content resists molten metal and slag corrosion, ensuring smelting purity.
Glass Industry: Glass melting furnace regenerator linings-high temp resistance (≥1600℃) adapts to regenerator heat storage cycles, stable volume avoids air leakage.
Chemical Industry: Alkaline chemical reactor linings-resists high-temp alkaline vapor corrosion, maintaining structural stability for 3-5 years.
5. Service & Support
Customization Service: Supports shape (wedge/arch/split) and size customization (e.g., 230×57×65mm split brick) with MOQ 10 tons; MgO content adjustment (65%-85%) based on kiln temp-3 days to provide sample drawings.
Pricing & Discounts: Tiered pricing based on MgO content: 65%-70% MgO ($270-$400/ton), 70%-80% MgO ($400-$600/ton), 80%-85% MgO ($600-$800/ton); $80 off for $1000+ orders, bulk orders (≥50 tons) enjoy 5%-8% additional discounts.
Samples & Quality Assurance: Free 10pcs samples provided (customer covers shipping); each batch undergoes 100% inspection (composition, density, strength) with test reports; 1-year quality warranty (free replacement for corrosion-related damage).
Delivery & Packaging: 1-10 tons shipped within 15 days, 11-50 tons within 20 days, 51-100 tons within 30 days, bulk orders (>100 tons) negotiable; standard packaging: fumigated wooden pallets (930×930mm) + plastic film (moisture-proof); shipped via Qingdao/Tianjin ports (FOB/CIF terms available).
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