High Alumina Brick - SK36

Grade 3 high alumina bricks are a kind of neutral refractory material, the main component of which is alumina (Al₂O₃), with a content of not less than 48%.

Made by using different grades of bauxite clinker and formula binder, after molding and calcination, they have high thermal stability and refractoriness, and are mainly used for open-hearth heat storage checker bricks, plugs for pouring systems, sprue stones, etc.

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Product Feature

(1) High refractoriness

(2) High refractoriness under load

(3) Strong slag resistance

(4) High compressive strength

(5) Good stability

(6) Good wear resistance

Product Application

(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.

Product Property

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

What Types of High Alumina Bricks Are There?

（1）By Al₂O₃ content: LZ-55 (≥55%, for hot blast stoves), LZ-75 (≥75%, for electric furnace tops), LZ-82 (≥82%, for blast furnace ceramic cups).

（2）Functional types: High-alumina checker bricks (heat exchange for hot blast stoves), phosphate-impregnated high-alumina bricks (wear-resistant for waste incinerators), and custom special-shaped bricks (molds ready in 3 days for small batches).

Advantages of High Alumina Bricks

（1）High temperature resistance: Refractoriness up to 1790℃, withstanding long-term use at 1200-1600℃.

（2）Precision & durability: CNC pressing (±1mm tolerance) + tunnel kiln sintering (20% energy saving via waste heat recovery), cold crushing strength ≥50MPa.

（3）Cost-efficiency: 95%+ waste recycling rate, raw material localized procurement (30% lower cost than imports).

Industrial Applications of High Alumina Bricks

（1）Steel industry: Blast furnace linings (cooperated with a Hebei steel mill, service life extended to 3 years, 6 months longer than peers).

（2）Cement industry: Kiln transition zones (resists thermal shock, ≥30 cycles at 1100℃).

（3）Glass industry: Glass furnace regenerators (LZ-82 bricks withstand 1790℃, reducing shutdowns).

Difference Between High Alumina Bricks & Insulation Bricks

Aspect	High Alumina Bricks (Highland)	Insulation Bricks
Core function	High-temperature resistance + load-bearing	Only heat insulation (non-load-bearing)
Long-term temp resistance	1200-1600℃	≤1200℃
Bulk density	2.15-2.5 g/cm³	0.6-1.3 g/cm³
Application scenario	Kiln core parts (e.g., furnace linings)	Furnace insulation layers

Highland Refractory: Your Best High Alumina Brick Manufacturer

（1）Strength: 30-year experience, 2 production bases, annual output of 30,000 tons of high alumina bricks.

（2）Quality: ISO 9001/CE certified, 3-level quality control (raw material → small-batch test → full inspection).

（3）Service: 15-day delivery for custom orders, 24/7 video technical support for overseas clients.

Choose Highland Refractory as Your High Alumina Brick Manufacturer

（1）Performance: SiC content ≥85%, refractoriness up to 1900℃, 10x higher thermal conductivity than ordinary bricks.

（2）Synergy: Co-shipment with high alumina bricks (saves 30% freight).

（3）Customization: Molds for special-shaped silicon carbide bricks ready in 5 days, Suitable for ladle slag lines and petrochemical reactors.

30+ Years High Alumina Bricks Manufacturer: Global Refractory Solutions

With 30+ years in the refractory industry, Highland Refractory is a leading high alumina bricks manufacturer delivering tailored solutions for steel, cement, and glass industries. We specialize in high alumina bricks, AZS bricks, and unshaped monolithic refractories—backed by 3-7 days fast delivery and custom service to match your exact high-temperature needs.

1.How to prevent damage during transportation?

For exports: Use EU-standard fumigated wooden crates + pearl cotton; for domestic sales: Use steel strip binding/lamination. Transport damage rate ≤ 0.8%, and a logistics tracking number will be provided.

2. How to handle quality issues?

Shaped high alumina bricks come with a 3-year warranty; free replacement for quality issues within the warranty period. Half-price inspection is available after the warranty expires.

3. Are there certifications and test reports?

We hold ISO 9001 and CE certifications (compliant with multiple domestic and international standards). Each batch undergoes three-level quality control (raw material inspection → small-batch testing → full inspection), and detailed test reports are provided.

4. Can you customize high alumina bricks with special properties?

Yes. We have a 2,300㎡ R&D center (cooperating with Luoyang Refractory Research Institute and Zhengzhou University). We can adjust raw material ratios (e.g., adding silicon carbide for high-temperature scenarios) and customize special-shaped bricks.

5. Are there well-known cooperation cases?

Chinalco: Bricks for aluminum electrolytic cells, extending the maintenance cycle from 6 to 9 months.
European cement plant: SK37 bricks prolonged the kiln transition zone’s service life to 18 months (6 months longer than before).
Domestic glass enterprise: SK39 bricks (withstands 1,790℃) reduced production line shutdowns.