Corundum - mullite brick refers to high purity or pure raw materials made of refractory products. Using industrial alumina powder and pure clay, bauxite or silica as raw materials to synthesize pure mullite raw materials, low content of alkali metal oxides.
The products made with mullite grain as aggregate have good thermal shock resistance, and the products made with corundum sand as aggregate have good corrosion resistance.
(1) Good high temperature strength
(2) Good thermal shock resistance
(3) Long service life
(4) Strong thermal conductivity
(5) Low creep rate
Petrochemical industry, metallurgy industry, glass industry, Chemical industry, energy industry.
|
Item |
Index |
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|
GMZ-88 |
GMZ-85 |
GMZ-80 |
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|
Standards |
Measured Values |
Standards |
Measured Values |
Standards |
Measured Values |
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|
化学成分 |
Al2O3（%≥） |
80 |
85.17 |
85 |
83.29 |
80 |
80.5 |
|
Fe2O3（%≤） |
0.8 |
0.48 |
1 |
0.7 |
1 |
0.73 |
|
|
Body density（g/cm3） |
≥3.0 |
3 |
≥2.85 |
2.92 |
≥2.75 |
2.8 |
|
|
porosity（%≤） |
15 |
13.75 |
16 |
14.88 |
18 |
16.23 |
|
|
Cold pressing strength（Mpa） |
≥120 |
132 |
≥100 |
112 |
≥100 |
103 |
|
|
Refractoriness under load/℃(0.2Mpa,0.6%) |
≥1700 |
＞1700 |
≥1682 |
＞1700 |
≥1650 |
1675 |
|
|
Heating line changes /℃（1400℃×2h） |
-0.1~0.1 |
0.1 |
-0.1~0.1 |
0.1 |
-0.1~0.1 |
0.14 |
|
|
Thermal shock stability（1100℃） |
≥10 |
＞15 |
≥10 |
＞12 |
＞10 |
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Highland Refractory classifies Mullite Corundum Bricks by alumina content, functional design, and application scenarios to meet diverse high-temperature needs:
By Alumina Content:
Standard Mullite Corundum Bricks (Al₂O₃ ≥ 80%): Balanced performance for medium-temperature industrial furnaces (e.g., glass kiln superstructures).
High-Alumina Mullite Corundum Bricks (Al₂O₃ ≥ 90%): Ultra-high purity for extreme environments (e.g., petrochemical gasifiers, 1600℃+ furnaces).
By Functional Design:
Low Creep Mullite Corundum Bricks: Enhanced creep resistance (≤0.1% at 1600℃, 3h) for long-term high-temperature stability (ideal for blast furnace hot blast stoves).
Zirconium Mullite Corundum Bricks: Added zirconia (ZrO₂) for superior thermal shock resistance (≥30 cycles at 1100℃ water cooling), used in glass fiber kilns.
By Structural Design:
Precast Mullite Corundum Modules: Factory-prefabricated for rapid on-site installation (e.g., glass kiln feeding channels).
Lightweight Mullite Corundum Bricks: Density 2.55–2.90g/cm³ with low thermal conductivity (0.25–0.5W/(m·K)) for energy-saving insulation layers.
Highland’s Mullite Corundum Bricks excel in harsh high-temperature environments:
Ultra-High Temperature Resistance: Refractoriness ≥ 1790℃ (up to 1850℃ for Al₂O₃ ≥ 90% grades), maintaining structural integrity in 1600℃+ continuous operations (e.g., steel ladle linings).
Exceptional Thermal Shock Resistance: Withstands ≥30 cycles of 1100℃ water cooling without cracking, ideal for rapid temperature fluctuations (e.g., glass kiln regenerators).
Low Creep Rate: ≤0.1% linear change at 1600℃ (3h), ensuring dimensional stability in long-term high-temperature loads (e.g., cement kiln preheater towers).
High Compressive Strength: Cold crushing strength ≥ 55MPa (up to 65MPa for Al₂O₃ ≥ 90% grades), supporting heavy industrial loads (e.g., blast furnace ceramic cups).
Corrosion Resistance: Resists acidic/alkaline slag erosion (e.g., petrochemical reactor linings) and oxidation by gases (O₂, H₂, CO) at high temperatures.
These bricks are critical for high-performance thermal equipment across sectors:
Glass Industry: Glass melting furnace superstructures, regenerators, and feeder channels (maintain uniform temperature for high-quality glass production).
Steel Industry: Blast furnace hot blast stoves, steel ladle linings (withstand molten steel erosion and thermal cycling).
Petrochemical Industry: Residue gasifiers, ammonia reformers, and catalytic cracking units (resist high-temperature hydrocarbon corrosion).
Cement Industry: Dry cement kiln decomposition zones, grate cooler high-wear parts (resist alkaline clinker erosion and mechanical stress).
Non-Ferrous Metals Industry: Aluminum electrolytic cell linings, copper smelting furnace roofs (resist metal melt penetration and high temperatures).
| Aspect | Mullite Corundum Bricks (Highland) | High Alumina Bricks (Highland) |
|---|---|---|
| Core Composition | Corundum + Mullite (Al₂O₃ ≥ 80%) | Al₂O₃ ≥ 55–80% (no mullite phase) |
| Temperature Resistance | 1790–1850℃ (ultra-high temp adaptable) | 1650–1790℃ (high temp adaptable) |
| Thermal Shock Resistance | ≥30 cycles (1100℃ water cooling) | ≥20 cycles (1100℃ water cooling) |
| Creep Resistance | ≤0.1% at 1600℃ (3h) | ≤0.2% at 1500℃ (50h) |
| Corrosion Resistance | Superior against acidic/alkaline slag | Strong against neutral/weakly alkaline slag |
Choose Highland for 3 core advantages:
Advanced Formulation Expertise: 30+ years in refractory R&D, specializing in mullite-corundum composites with tailored alumina/zirconia ratios for specific industries (e.g., glass, steel).
Strict Quality Control: ISO 9001/CE/SGS certified, with 3-stage QC (raw material purity testing → sintering temperature control → creep rate analysis) for each batch.
Global Scale & Trust: 60,000 tons annual capacity, 2 production bases, and 1,500+ clients in 100+ countries (e.g., European glass giants, Asian steel mills) with 98% satisfaction.
Highland delivers unmatched value:
Customization Flexibility: Tailor alumina content (80–90%), shape (arc, wedge, precast modules), and additives (zirconia, silicon carbide) with 3–5 day mold turnaround.
Supply Chain Efficiency: 3–7 day standard delivery, bulk purchase discounts (5–10% for orders ≥1,000 tons), and JIT inventory for urgent projects.
Full-Lifecycle Support: 24/7 technical guidance (e.g., installation for glass kiln roofs), 5-year warranty against structural defects, and free lifetime maintenance advice.
Logistics Reliability: Partner with Qingdao/Shanghai ports, using shock-absorbent packaging (transport damage rate ≤0.5%) and real-time cargo tracking.
Zhengzhou Gaoyuan Refractory Co., Ltd., a trusted refractory manufacturer with over 30 years of experience in the refractory industry, offers factory direct sales, fast delivery within 3-7 days, and exclusive bulk purchase discounts to meet the high-temperature demands of the global petrochemical, steel, cement, and glass industries. We provide over 1,500 customers worldwide with customized refractory solutions that balance performance, durability, and cost-effectiveness.
Answer: The packaging of Mullite Corundum Bricks is as follows. Each brick is wrapped in moisture - proof kraft paper and separated by 2cm - thick shock - absorbent foam to prevent scratches and collisions. Then, the bricks are packed into export - grade plywood crates (thickness ≥15mm) reinforced with steel straps at 4 corners. The crates are labeled with “Fragile,” “Temperature - Sensitive,” and handling instructions in 3 languages (English, Spanish, Mandarin). This packaging ensures a transport damage rate ≤0.5%.
Answer: For standard orders of Mullite Corundum Bricks, we usually deliver within 3 - 7 days. However, for custom - designed bricks, the delivery time may vary depending on the complexity of the design. Generally, it takes 10 - 15 days if molds need to be made. In case of large - scale bulk orders, we will communicate the specific delivery schedule with you in advance.
Answer: Of course. We can provide a few free samples of standard - shaped Mullite Corundum Bricks. You only need to pay for the shipping cost to your address. For custom - shaped samples, a small mold fee may apply, but it is refundable when you place a bulk order. Please share your shipping address and let me know if you need custom - shaped samples.
Answer: We can accept the following payment methods for Mullite Corundum Bricks: T/T and PayPal. The customer is required to settle the remaining balance before the goods are dispatched. Currently, payment after delivery is not an option, but we are constantly exploring more flexible payment terms to better serve our customers.
Answer: Yes, we do. Our Mullite Corundum Bricks undergo strict quality control. Each batch comes with a detailed quality inspection report that includes raw material purity testing results, sintering temperature logs (1700 - 1800℃), and creep rate analysis data. Let me send you the relevant report for your reference.
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