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DITA Refractory Products
Refractory brick is a block of refractory ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces.
We provide high quality Refractory Fire Bricks that are used on wide range in the various industries like Cement, Glass and Steel. Refractory Fire Bricks are provided as per the quantity and specifications required by the customers. We provide an extensive range of Refractory Fire Bricks at reasonable prices that depend upon the quantity ordered.
Fire Clay Brick
The main chemical components: Al2O3 content is 30%-48%, SiO2 content is 50%-65%, and a small number of alkali metals, metal oxides, etc. Mineral composition is usually mullite, quartz and glass phase. Its refractoriness is 1580-1750 °C, refractoriness under load is 1250-1450 °C, with good thermal resistance and strong ability to resist acid slag.
Fire Clay Bricks is used for lower parts of regenerators, hot blast stove, furnaces of metallurgic, building material, glass, ferrous metal and so on.
Technical Specifications:
Item | Index | |||
SK-30 | SK-32 | SK-34 | SK-35 | |
AL2O3 % (≥) | 30 | 35 | 38 | 45 |
Fe2O3 % (≤) | 2.5 | 2.5 | 2.0 | 2.0 |
Refractoriness(SK) | 30 | 32 | 34 | 35 |
Refractoriness Under Load, 0.2MPa, (°C ) | 1250 | 1300 | 1350 | 1400 |
Apparent Porosity (%) | 22-26 | 22-26 | 20-24 | 20-22 |
Bulk Density (g/cm³) | 1.9-2.0 | 1.95-2.1 | 2.1-2.2 | 2.15-2.22 |
Cold Crushing Strength (MPa) | 20 | 25 | 25 | 30 |
Thermal Expansion at 1000°C (%) | 0.8 | 0.6 | 0.6 | 0.5 |
Note:
Above are average test data, subject to reasonable variations
The AP, BD and CCS values are arithmetic mean of five individual results
Size tolerance: allowed to the extent of ±2% or ±2 mm, whichever is greater
High Alumina Brick
We also provide high alumina brick. Refractoriness under load is normally above 1420~1550°C that is higher than the fireclay brick and it increases along with the AL2O3 content. High alumina brick have very good ability of anti-acidity, anti-metal fluid corrode and anti-oxidation.High alumina brick are used normally in industry furnaces such as Blast furnace, hot-blast furnace.
Technical Specification:
Item | Index | ||||
International code name | SK35 | SK36 | SK37 | SK38 | SK40 |
Chinese code name | LZ-48 | LZ-55 | LZ-65 | LZ-75 | LZ-80 |
Al2O3 min % | 48 | 55 | 65 | 75 | 80 |
Fe2O3 max % | 2 | 2 | 2 | 2 | 2 |
Refractoriness oC min. | 1750 | 1770 | 1790 | 1790 | 1790 |
Refractoriness under Load C min. | 1420 | 1470 | 1500 | 1520 | 1530 |
Permanent Linear Change % | 1450 C×2h | 1500 C×2h | 1500 C×2h | 1500 C×2h | 1500 C×2h |
+0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 | |
Apparent Porosity max. % | 22 | 22 | 23 | 23 | 21 |
Cold Crushing Strength mim. | 39 | 44 | 49 | 54 | 65 |
Packaging :
Fumigated wooden pallet, plastic shrinkage outside
Certificate:
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