Best-Selling Custom Shaped Sk32 33 34 Refractory Fire Clay Brick for Furnace Kiln Lining
Innovation, superior performance and reliability constitute our core corporate values. Now more than ever, these principles underpin our success as an internationally‑focused mid‑sized supplier of custom‑shaped SK32 SK33 SK34 SK35 fire‑clay refractory bricks for furnace and kiln linings. We welcome new and returning customers from all over the world to reach out to us for long‑term business partnerships and shared mutual growth.
We supply standard & custom refractory fire clay bricks. With rich industry experience, we support custom orders based on your drawings, photos or samples, including customized technical specifications and customer‑branded packaging. Our primary objective is to deliver satisfying experiences for every client and build lasting win‑win business relationships. Please feel free to get in touch for further details. We also warmly welcome on‑site visits to our premises.
Fire clay bricks are silico-aluminous refractory materials with an Al₂O₃ content of 30%–45%. They are primarily made from kaolin, formed into shape, dried, and then fired at a high temperature of 1300–1400℃. During the firing process, mullite crystals are formed. With a refractoriness of 1690–1730℃, fire clay bricks are classified as weakly acidic refractory products.
Standard Sizes:
Standard Brick: 230 × 114 × 65 mm (T-3)
Half-Rib: 230 × 57 × 65 mm
Wedge Bricks: 230 × 114 × 65/55 mm, 230 × 114 × 65/45 mm
Sliced Bricks: 20/32/40/50 mm thickness (230×114 base)
Common Brick Shapes & Custom Options:
Straight bricks, wedge bricks, checker bricks, anchor bricks, universal arch bricks, octagonal cylinder bricks, casting bricks, and custom shapes according to client’s drawings / samples.
Classification:
Fire clay bricks can be categorized into four types: ordinary, dense, low-creep, and thermal shock resistant, covering various grades with an Al₂O₃ content ranging from 25% to 45%.
Key Characteristics:
Fire clay bricks exhibit excellent resistance to acidic slag and acidic gas corrosion, but have relatively poor resistance to alkaline substances. They feature good thermal shock resistance: in the temperature range of 0–1000℃, their volume expands uniformly with increasing temperature, with a linear expansion rate of 0.6%–0.7%, which is about half that of silica bricks. However, their refractoriness under load is over 200℃ lower than that of silica bricks, and volume shrinkage occurs when the temperature exceeds 1200℃.
| Fire Clay Bricks Model | SK-32 | SK-33 | SK-34 |
| Refractoriness(℃) ≥ | 1710 | 1730 | 1750 |
| Bulk Density(g/cm3) ≥ | 2.00 | 2.10 | 2.20 |
| Apparent Porosity(%) ≤ | 26 | 24 | 22 |
| Cold Crushing Strength(MPa) ≥ | 20 | 25 | 30 |
| Permanent Linear Chang@1350°×2h(%) | ±0.5 | ±0.4 | ±0.3 |
| Refractoriness Under Load(℃) ≥ | 1250 | 1300 | 1350 |
| Al2O3(%) ≥ | 32 | 35 | 40 |
| Fe2O3(%) ≤ | 2.5 | 2.5 | 2.0 |
|
Low Porosity Clay Bricks Model
|
DN-12
|
DN-15
|
DN-17
|
|
Refractoriness(℃) ≥
|
1750
|
1750
|
1750
|
|
Bulk Density(g/cm3) ≥
|
2.35
|
2.3
|
2.25
|
|
Apparent Porosity(%) ≤
|
13
|
15
|
17
|
|
Cold Crushing Strength(MPa) ≥
|
45
|
42
|
35
|
|
Permanent Linear Change@1350°×2h(%)
|
±0.2
|
±0.25
|
±0.3
|
|
Refractoriness Under Load@0.2MPa(℃) ≥
|
1420
|
1380
|
1320
|
|
Al2O3(%) ≥
|
45
|
45
|
42
|
|
Fe2O3(%) ≤
|
1.5
|
1.8
|
2.0
|
Metallurgical Industry
In the metallurgical industry, clay refractory bricks are mainly used in equipment such as blast furnaces, hot blast furnaces and glass kilns. Clay refractory bricks for blast furnaces can withstand high temperatures and corrosive atmospheres to protect the furnace structure; clay refractory bricks for hot blast furnaces are used for the lining of hot blast furnaces to ensure their normal operation; large clay refractory bricks for glass kilns are used in glass melting furnaces to ensure stability and fire resistance at high temperatures.
Chemical Industry
In the chemical industry, clay refractory bricks are used as insulation layers for equipment such as reactors, cracking furnaces and synthesis furnaces. These equipment work under high temperatures and corrosive atmospheres, and clay refractory bricks can effectively reduce heat loss and improve energy efficiency.
Ceramic Industry
In the ceramic industry, clay refractory bricks are used for the insulation walls and roofs of ceramic firing kilns to maintain the high temperature environment in the kiln and promote the firing of ceramic products. Hard clay and semi-hard clay are used as raw materials for the manufacture of daily-use ceramics, building ceramics and industrial ceramics.
Building Industry
Industry In the building materials industry, clay refractory bricks are used to make cement kilns and glass melting furnaces.
Frequently Asked Questions
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We are a real manufacturer, our factory is specialized in producing refractory materials for more than 30 years. We promise to provide the best price, the best pre-sale and after-sale service.
For each production process, RBT has a complete QC system for chemical composition and physical properties. And we will test the goods, and the quality certificate will be shipped with the goods. If you have special requirements, we will try our best to accommodate them.
Depending on the quantity, our delivery time is different. But we promise to ship as soon as possible with guaranteed quality.
Of course, we provide free samples.
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There is no limit, we can provide the best suggestion and solution according to your situation.
We have been making refractory materials for more than 30 years, we have strong technical support and rich experience, we can help customers design different kilns and provide one-stop service.
