First-grade high-alumina special-shaped brick is a high-quality refractory material, the main component of which is alumina (Al₂O₃) with a content of not less than 75%.
It is made by using different grades of bauxite clinker and formula binder, and undergoing high-temperature mixing, forming, drying, sintering, brick press molding and high-temperature calcination. First-grade high-alumina special-shaped brick has extremely high refractory performance and chemical corrosion resistance, and is mainly used in key parts of ultra-high temperature industrial furnaces.
(1) High refractoriness
(2) High refractoriness under load
(3) Strong slag resistance
(4) High compressive strength
(5) Good stability
(6) Good wear resistance
(1) Iron and steel manufacturing industry: blast furnace, hot blast furnace, electric furnace, ladle, tundish, heating furnace, refining furnace, heating furnace, annealing furnace, cupola
(2) Nonferrous metal industry: smelting furnace, refining furnace, reverberatory furnace, converter furnace.
(3) Building materials industry: cement kiln, glass kiln, ceramic kiln, lime kiln, kiln car, tunnel kiln
(4) Energy and incineration: coke oven, circulating fluidized bed boiler, carbon roaster, incinerator.
|
Item |
Index |
||||
|
Model |
SK35 |
SK36 |
SK37 |
SK38 |
SK39 |
|
Al2O3/% |
≥48 |
≥55 |
≥65 |
≥75 |
≥80 |
|
Fe2O3/% |
≤2 |
≤2 |
≤2 |
≤2 |
≤2 |
|
Body density（g/cm3） |
2.15 |
2.2 |
2.3 |
2.4 |
2.5 |
|
Refractory |
≥1750 °C |
≥1770 °C |
≥1790 °C |
≥1790 °C |
≥1790 °C |
|
Change in heating permanent line/% |
1450℃×2h -0.4~0.1 |
1450℃×2h -0.4~0.1 |
1450℃×2h -0.4~0.1 |
1500℃×2h -0.4~0.2 |
1500℃×2h -0.4~0.2 |
|
Cold pressing strength |
≥39Mpa |
≥44Mpa |
≥49Mpa |
≥54Mpa |
≥65Mpa |
|
Apparent porosity (≤) |
≤22% |
≤22% |
≤23% |
≤23% |
≤21% |
|
Load softening temperature [0.2MPa*0.6%]≥ |
≥1420 °C |
≥1470 °C |
≥1500 °C |
≥1520 °C |
≥1530 °C |
Highland's high alumina special-shaped bricks are categorized by shape, Al₂O₃ content, and functional scenarios to meet complex industrial needs:
By shape: L-shaped, T-shaped, wedge-shaped, and arc-shaped bricks (ideal for non-standard structures like kiln corners and furnace roofs).
By Al₂O₃ content:
LZ-65 Bricks (Al₂O₃ ≥ 65%): Refractoriness ≥ 1790℃, cold crushing strength ≥ 49MPa, suitable for cement kiln transition zones.
LZ-75 Bricks (Al₂O₃ ≥ 75%): Withstands up to 1850℃, excellent slag resistance, used in ceramic cups of steel blast furnaces.
By function:
Spalling-resistant high alumina special-shaped bricks (with silicon carbide): Resists rapid temperature changes, fit for glass kiln regenerators.
High-density high alumina special-shaped bricks (bulk density ≥ 2.5g/cm³): Load-bearing capacity ≥ 50MPa, used for furnace roof load-bearing structures.
Highland's high alumina special-shaped bricks solve high-temperature and load-bearing challenges of non-standard equipment through advanced materials and craftsmanship:
Precise fit for complex structures: CNC processing with ±1mm tolerance, seamlessly matching irregular parts (e.g., kiln corners, pipeline joints) to reduce heat loss from standard brick splicing.
Ultra-high temperature resistance & strength: When Al₂O₃ ≥ 65%, refractoriness reaches ≥ 1790℃, and cold crushing strength ≥ 49MPa, ensuring no deformation during long-term use at 1500℃.
Thermal shock & slag resistance: Withstands ≥ 30 cycles of 1100℃ water cooling without cracking, and resists alkaline slag erosion (e.g., in steel blast furnace slag lines).
Extended equipment lifespan: The seamless design extends kiln lining life by 30–50% (e.g., a European cement plant’s kiln life increased from 18 to 27 months).
With custom shapes + high-alumina composition, these bricks are core materials for complex thermal equipment across industries:
Steel industry: Blast furnace ceramic cups (LZ-75 bricks resist 1850℃ molten iron erosion), converter trunnion bricks (load-bearing ≥ 50MPa).
Cement industry: Rotary kiln transition zone L-shaped bricks (thermal shock resistance ≥ 30 cycles, withstands 1450℃ clinker scouring).
Glass industry: Glass furnace regenerator arc-shaped bricks (with silicon carbide, resists 1600℃ glass melt corrosion).
Chemical industry: Reactor lining T-shaped bricks (resists acidic gas corrosion, service life up to 5 years).
Non-ferrous metals industry: Aluminum electrolytic cell side wedge-shaped bricks (resists 960℃ aluminum melt penetration, low electrical conductivity).
| Aspect | High Alumina Special-Shaped Bricks (Highland) | Fire Clay Bricks (Highland) |
| Core Composition | Al₂O₃ ≥ 65% (neutral/weakly alkaline) | Al₂O₃ 30–48% (weakly acidic) |
| Temperature Range | 1790–1850℃ (ideal for ultra-high temp scenarios) | 1580–1750℃ (suited for medium-high temp) |
| Structural Fit | Custom shapes (L/T/arc) for seamless complex equipment integration | Mainly standard shapes (rectangular/wedge) |
| Load-Bearing & Slag Resistance | Cold crushing strength ≥ 49MPa, resists alkaline slag (steel/cement) | Cold crushing strength 15–30MPa, resists acidic slag (glass/chemical) |
Three core advantages make Highland stand out:
Customization Strength: 30 years of special-shaped brick expertise, full-process customization from drawings to finished products (50% mold cost reduction, 3–7 days lead time).
Quality Assurance: ISO 9001/CE certified, 3-stage QC (raw material spectral analysis → post-sintering strength test → thermal shock test) for each brick.
Global Credibility: Serves 1,500+ clients (e.g., CHINALCO, European cement leaders), with a >70% repeat order rate for high alumina special-shaped bricks.
Highland delivers value via technology, capacity, and service:
Technical Edge: Collaborates with Luoyang Refractory Research Institute; special-shaped brick precision reaches ±0.5mm (vs. industry average ±2mm).
Capacity Guarantee: 60,000 tons/year refractory output, 2 production bases, supports bulk orders (e.g., 1,000+ tons monthly delivery).
Full-Lifecycle Service: Provides on-site/remote video installation guidance, 5-year warranty (free replacement for cracking).
Logistics Advantages: Ships from Zhengzhou/Qingdao ports, uses export-grade wooden crates + shock-proof foam (transport damage rate ≤ 0.8%), with real-time tracking.
Zhengzhou Plateau Refractory Co., Ltd. has been deeply involved in the refractory industry for more than 30 years and is a trustworthy refractory clay brick manufacturer.—delivering factory-direct supply, 3-7 days fast delivery, and exclusive bulk purchase discounts to meet the high-temperature needs of petrochemical, steel, cement, and glass sectors worldwide. Founded in 1993, we’ve dedicated decades to fire clay brick R&D, production, and on-site installation, serving 1,500+ global customers with tailored refractory solutions that balance performance, durability, and cost-efficiency.
Answer: For standard orders of high alumina special - shaped bricks, we usually deliver within 3 - 7 days. However, for custom - designed special - shaped 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: Our high alumina special - shaped bricks are carefully packaged to minimize the risk of damage during transit. We use export - grade wooden crates that are sturdy and durable. Inside the crates, the bricks are separated by shock - proof foam or pearl cotton to prevent them from colliding with each other. Additionally, we reinforce the wooden crates with steel strips for extra protection. With this packaging method, we can keep the transport damage rate to ≤ 0.8%.
Answer: Absolutely. We are more than happy to provide you with samples of high alumina special - shaped bricks. You can request 3 - 5 sample pieces of standard shapes. For custom - shaped samples, we may charge a small fee to cover the cost of mold making and production. Once you submit your sample request, we will arrange to send it out within 2 - 3 working days.
Answer: We accept multiple payment methods for your convenience. You can pay via bank transfer, which is a common and secure option. We also accept payments made through international payment platforms like PayPal for overseas customers. For large - scale orders, we are open to discussing flexible payment terms, such as installment payments.
Answer: Yes, we offer comprehensive after - sales service. If you find any quality issues with the high alumina special - shaped bricks within the 5 - year warranty period, we will provide free replacement. Our technical team is also available 24/7 to offer installation guidance and solve any technical problems you may encounter during the use of the bricks. In addition, we can provide half - price inspection services after the warranty expires.
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