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Refractories

Refractories are inorganic, nonmetallic materials retaining strength at high temperature above 1580°C. Resistant to physical force and chemical changes, refractoies are provided for high-temperature applications in industrial kiln and furnace, container and equipment components.

Classifications:

1. According to refractoriness

1) Common refractoies (1580-1770°C)

2) High-grade refractories (1770-2000°C)

3) Special-grade refractories (above 2000°C)

2. According to shape and size

1) Standard brick

2) Special shaped brick

3) Complicated shaped brick

4) Special shaped brick in large size

5) Special products for crucibles, Utensils and pipes

3. According to technology

1) Slurry castable

2) Plastic-froming castable

3) Semi-dry pressed product

4) Non-plastic clay tamped product

5) Fused castable product

6) Rock sawed product

4. According to chemical and mineral composition

1) Silica product: silica bricks and quartz glass

2) Aluminum silicates products: semi-silica bricks, fireclay bricks and high alumina brick

3) Magnesia based products: magnesia bricks (periclase bricks), magnesia-alumina bricks, magnesia calcium bricks, magnesia-dolomite bricks and magnesia carbon bricks

4) Dolomite-based product: dolomite bricks

5) Chrome product: chromite bricks and chrome magnesia bricks

6) Carbon based product: car carbon bricks, graphite products and silicon carbide products

7) Zirconia product: Zircon bricks

8) Special product: pure oxide products, carbide, nitride, silicide, boron compounds and cermet etc.

5. According to appearance

1) Shaped refractories: burned brick, unbeurned brick, fused brick, insulating refractory brcik

2) Unshaped refractories: castable, ramming mix, slinger mix, gunnung mix, plastic refractories and refractory mortar

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