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Silicon carbide refractory fraction 1-3mm 1-5mm 1-10mm

Silicon carbide refractory fraction 1-3mm 1-5mm 1-10mm

Product Introduction

Black silicon carbide (SiC) is also called black carborundum. It is a non-metallic material made from Petroleum coke and silicon sand by melting in a high-temperature resistance furnace. The main application of black silicon carbide in cast iron & ductile iron foundry is deoxidizer due to its high refractory stability, good thermal stability, high-temperature slag resistance, and good deoxidization and reduction properties. Adding silicon carbide to the iron before casting can improve the performance and quality of cast iron. Usually, 85-90% silicon carbide is suitable for the casting of gray cast iron, and 97-98% silicon carbide is suitable for the casting of ductile iron.

The melting point of silicon carbide is as high as 2700 . During the process of melting cast iron in an induction furnace, it does not melt in high-temperature molten iron, but rather mix in cast iron. The addition of black silicon carbide can improve the carbon equivalent, serve as a Oxygen scavenger to strengthen the reducibility of molten iron. It can prevent carbide precipitation, improve the compactness of cast iron, increase the graphite spheroidization rate of nodular cast iron. Thus, adding carborundum can improve the quality of cast iron.

The fuctions of black silicon carbide particles in ductile iron casting:

Physical properties of Black silicon carbide F16/F20 for ductile iron foundry

Hardness:

Mohs:9.2, Vicker :28-32 GPa

Melting Point:

dissociated at about 2300 °C

Maximum service temperature:

1900℃

Specific Gravity:

Bulk density(LPD):

Color:

Black

Particle shape:

Hexagonal

Modulus of Elasticity

58-65x106 psi

Coefficient of Thermal Expansion

Thermal Conductivity

71-130 W/MK

Chemical contents of Black silicon carbide F16/F20 for ductile iron foundry

Item

Content

SiC

SiO2

H2O3

Fe2O3

F,Si

Other specifications of black silicon carbide for foundry & refractory:

SiC purity

Fe2O3

Moisture

SiC86

≥ 86%

≤2.4%

≤ 2.0%

≤ 0.2%

SiC88

≥ 88%

≤ 2.3%

≤ 2.0%

≤ 0.2%

SiC90

≥ 90%

≤ 2.0%

≤ 1.8%

≤ 0.2%

SiC92

≥ 92%

≤ 1.8%

≤ 1.7%

≤ 0.2%

SiC93

≥93%

≤ 1.8%

≤ 1.6%

≤ 0.2%

SiC95

≥ 95%

≤ 1.0%

≤ 1.3%

≤ 0.2%

SiC97

≥ 97%

≤ 0.8%

≤ 1.2%

≤ 0.2%

≥97.5%

≤ 0.8%

≤ 0.9%

≤ 0.2%

SiC98

≥ 98%

≤ 0.5%

≤ 0.5%

≤ 0.2%

Black silicon carbide particle sizes for foundry & refractory:

Macro grit and grain: F12,F14,F16,F20,etc.

Fraction:1-3mm 0-10mm,0-5mm,1-10mm,1-5mm, etc.



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