1.Good resistance to corrosion and abrasion,
2.Perfect thermal shock resistance,
3.Good spalling resistance,
4.High mechanical strength,
5.Good volume stability under high temperature,
6.Excellent thermal performance, and acid resistance.
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info@rsrefractories.comFireclay 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.
| ITME | SK 31 | SK 30 | SK 30 | SK 29 | SK 29 | SK 28 | SK 27 |
| CHINA CODE | N-1 | N-2a | N-2b | N-3a | N-3b | N-4 | N-5 |
| Refractoriness ℃ | 1750 | 1730 | 1730 | 1710 | 1710 | 1690 | 1670 |
| Al2O3 % | 40 | 39 | 34 | 34 | 32 | 32 | 31 |
| Fe2O3 % | 2.1 | 2.1 | 2.3 | 2.3 | 2.5 | 2.5 | 2.5 |
| Apparent Porosity％ | 22 | 24 | 26 | 24 | 26 | 24 | 26 |
| Bulk Density g/cm3 | 2.15 | 2.1 | 2.1 | 2.05 | 2.05 | 2.05 | 2 |
| Cold Crushing Strength Mpa |
30 | 25 | 20 | 20 | 15 | 20 | 15 |
| 0.2Mpa Refractoriness Under Load T0.6 ℃ ≥ |
1400 | 1350 | 1350 | 1320 | 1320 | 1300 | 1300 |
| Reheating Linear Change 1400℃ |
0.1–0.4 | 0.1–0.5 | 0.2–0.5 | ||||
| Reheating Linear Change 1350℃ |
0.2–0.5 | 0.2–0.5 | 0.2–0.5 | 0.2-0 |
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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