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Refractory Materials

The purpose of a refractory material is to withstand the high temperatures required in furnaces, kilns, incinerators, power plants etc without contaminating other materials and to conserve heat in the area where it is needed. Dense refractories are heavy with low porosity but high mechanical strength. Insulating refractory materials have a higher porosity making them less dense and with low thermal conductivity. This increases efficiency and reduces the amount of energy required for the process at hand.

The most common form of dense refractories are firebricks. Made from hydrated aluminium silicates with small amounts of other elements, they are versatile and relatively cheap. Firebricks with a higher alumina content are able to perform at higher temperatures. Refractories with an alumina content of 99% are known as corundum and are used in processes at over 1500°C such as pouring steel, glassmaking, ash melting, incineration and moulds for casting super alloys.

Product Features:

1. High refractoriness, high-temperature endurable.
2. Good thermal shock resistance.
3. Good volume stability at high temperature.
4. Good corrosion resistance.
5. Good spalling resistance and wear resistance.
6. High mechanical strength.
7. High-temperature creep rate is low.

Product Parameters:

SK series SK30 SK32 SK34 SK35
Al2O3 30%-35% 35%-38% 38%-42% 42%-50%
Item 33% Al2O3

fire clay brick

38% Al2O3

fire clay brick

42% Al2O3

fire clay brick

48% Al2O3

fire clay brick

Al2O3 33% 38% 42% 48%
Fe2O3/% ≤3 ≤3 ≤3 ≤2.5
Refractoriness ≥1690 °C ≥1730 °C ≥1750 °C ≥1750 °C
Bulk density/g/cm3 1.9-2.0 2.0-2.1 2.1-2.18 2.15-2.3
Unit weight (230*114*65mm) ≥3.35KGS ≥3.55KGS 3.65KGS ≥3.75KGS
Apparent porosity/% ≤26 ≤24 ≤24 ≤22
Cold crushing strength  ≥20Mpa ≥25Mpa ≥30Mpa ≥35Mpa
Refractoriness under load ≥1250 °C ≥1300 °C ≥1350 °C ≥1420 °C
Reheating Linear Change/% 0~ -0.5


0~ -0.3


0~ -0.4


+0.1~ -0.4


Application and After-Sales Service:


1. Iron & steel making: Blast furnace, hot blast stove, hot metal ladle, tundish, soaking pit, heat treatment furnace, refining furnace, reheating furnace, metal mixter furnace, cupola furnace.

2. Non-ferrous Metal: Smelting furnace, reverberatory furnace.

3. Building materials: Cement kiln, glass kiln, ceramic kiln, lime kilns, kiln car, tunnel kiln, rotary kiln.

4. Energy&Incineration: Coke oven, boiler, power generation boiler, CFB boiler, electric furnace, carbon roasting furnace, waste incinerators.

5. Others: Petrochemical industry furnace, pizza oven.

Our refractory materials are exported to USA, Canada, Europe, and South America and Southeast Asia.

After-sales service:

Accept any repair of the product, help to improve technology for customer. And also provide long-term technical help and support for you.


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