Product Description of Ronghua Fire Clay Bricks
Fireclay brick is also called chamotte brick. It is acidic firebrick. The higher SiO2 content, the stronger acid corrosion resistance. Fireclay brick has certain degree of acid slag corrosion resistance, but its alkaline slag corrosion resistance is not good. Therefore, fireclay brick is usually used as acidic kilns inner lining. The main applications of fireclay bricks are blast furnace, hot blast furnace, glass furnace, carbon furnace, etc.

Product Features And Advantages of Fire Clay Refractory Brick
- High refractoriness: Its refractoriness is as high as 1770 degrees Celsius.
- High softening temperature: The softening temperature is generally between 1300-1400 degrees Celsius.
- Strong resistance to thermal shock: It can resist sudden changes in temperature. It has a stable structure in high temperature.
- Resistant to acidic chemical erosion: Clay firebricks can resist the erosion of acidic slag and acidic gases.
- Affordable price: Clay firebricks have a wide range of raw material sources. Therefore, its price is more acceptable to customers.
Product Specifications of Fireclay Bricks
Ronghua provides a series of sk fireclay bricks, including SK30, SK32, SK34, and SK35. Please see the following parameters. If you need other types, please send us the specification.
Item/Grade |
SK-30 |
SK-32 |
SK-34 |
SK-35 |
Al2O3, % |
≥ |
30 |
35 |
38 |
45 |
Fe2O3, % |
≤ |
2.5 |
2.5 |
2 |
2 |
Refractoriness (SK) |
≥ |
30 |
32 |
34 |
35 |
Refractoriness underload, 0.2MPa, °C |
≥ |
1250 |
1300 |
1360 |
1420 |
Apparent Porosity, % |
≤ |
22-26 |
20-24 |
20-22 |
18-20 |
Bulk Density, g/cm³ |
≥ |
1.9-2.0 |
1.95-2.1 |
2.1-2.2 |
2.15-2.22 |
Cold Crushing Strength, MPa |
≥ |
40 |
45 |
30 |
40 |
Product Applications of Fireclay Bricks

Fireclay bricks is the most widely used firebricks with the largest output in the world. They are used to build working lining and permanent linings of various kinds of thermal equipment and kilns. For example, fireclay bricks are widely used in blast furnace, hot blast furnace, glass furnace, etc.
Blast furnace fireclay bricks are mainly used at small blast furnace throat, furnace bosh, furnace hearth and furnace bottom, large blast furnace bosh. Blast furnace fireclay bricks have high cold crushing strength, long term furnace load wear resistance, small volume shrinkage at high temperature working condition, so furnace lining integrity can be kept. Besides, blast furnace fireclay brick should have low apparent porosity, low Fe2O3 content, so carbon won’t deposit in pores.








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Q: What about the lead time for mass product?
A: The lead time is based on the quantity, about 7-12days. For graphite product, apply Dual-use items license need about 15-20 working days.
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A: A free test sample can be supplied before your first purchase order, you only need to pay the freight cost.
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