Special Refractory Castable

Special Refractory Castable

Special refractory castables are high-performance materials made of high-quality fused corundum sand and silicon carbide sand as raw materials, and are reasonably matched with organic or inorganic binders. Special refractory castables have the characteristics of wear resistance, acid resistance, alkali resistance, high thermal conductivity, small thermal expansion coefficient, high strength, erosion resistance, slag resistance, and good thermal stability.
They are widely used in special kilns or parts, so they have special performance requirements.
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Description
product-800-800

Special refractory castables mainly include castables with wear resistance, acid resistance, alkali resistance and high thermal conductivity. This type of castable is used in special kilns or parts, so it has special performance requirements.

Special refractory castables use fused corundum as the main raw material, with multi-level particle grading to achieve the maximum stacking density; it is compounded with a variety of ultra-fine and high-efficiency additives, and the refractory powder fineness of 0.09mm should be greater than 90%. Select excellent binders, ultra-fine powders and additives to make the castable dense and high-strength. The main characteristics are high strength, good volume stability, excellent corrosion resistance, and no influence from reducing gases such as H2 and CO.

 

 

Special refractory castables are high-performance materials made of high-quality fused corundum sand and silicon carbide sand as raw materials, and are reasonably matched with organic or inorganic binders. Special refractory castables have the characteristics of high thermal conductivity, small thermal expansion coefficient, high strength, erosion resistance, slag resistance, good thermal stability, etc. As a special material, it is selected by blast furnaces, hot blast furnaces, chemical kilns and industrial kiln linings, replacing other refractory materials. High thermal conductivity castables are also called silicon carbide castables. They use high-quality SiC as the main raw material and are scientifically formulated. Special refractory castables are characterized by high thermal conductivity, small linear expansion coefficient, corrosion resistance, good resistance to rapid cooling and heating, and high strength. In thermal equipment such as blast furnaces, hot blast furnaces, heating furnaces, chemical kilns and industrial kilns, the energy-saving effect is obvious, the service life is long, and the effect is good.

product-1694-800

 

Kind

SiC

Al₂O₃-MgO

 

Brand

SSC-75

SLM

Max.service temperature

(℃)

1550

1600

Amount required (T/M³)

2.40

2.70

Additional water

((%)

9-10

8-10%Water glass

Be=40° M=2.4-3.0

Chemical composition

(%)

Al₂O₃

MgO

SiC

--

--

≥75

≥68

≥10

--

Bulk density

(g/cm³)

after drying at 110℃×24hr

firing at 1000℃×3hr

--

≥2.25

≥2.60

--

Permanent linear change (%)

110℃×24hr

after drying at 110℃×24hr

firing at 1000℃×3hr

--

±1.0

±0.5

--

(MPa)

Cold crushing strength

after drying at 110℃×24hr

--

≥30

(℃)

Refractoriness

--

≥1770

Characteristics

Water set

Air set

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