Silicon carbide used in industry is a synthetic material, commonly known as emery. Silicon carbide is one of the most commonly used non-oxide refractory raw materials in the field of refractories.
Silicon carbide SiC for conventional abrasive
Silicon carbide used in industry is a synthetic material, commonly known as emery. Silicon carbide is one of the most commonly used non-oxide refractory raw materials in the field of refractories. Clay-bonded silicon carbide, oxide-bonded silicon carbide, silicon nitride-bonded silicon carbide, recrystallized silicon carbide, reactive sintering silicon carbide and other products produced from silicon carbide
And amorphous refractories are widely used in blast furnaces, zinc smelting furnaces in metallurgy industry, kiln furniture in ceramic industry, etc.
Silicon carbide is available in black and green varieties. The content of SiO2 in the siliceous raw material is as high as possible and the impurity content is as low as possible when treating green silicon carbide; while the content of SiO2 in the production of black silicon carbide raw material can be slightly lower.
In the production of advanced silicon carbide refractories such as Si3N4-SiC, recrystallized SiC (R-SiC) and reactive sintered silicon carbide (Sisic), it is best to use shaped SiC sand. In the production of silicon carbide kiln furniture of the above materials, shaped SiC sand is widely used abroad, and the density, strength and oxidation resistance of kiln furniture have been significantly improved.
|
particle size range |
SiC> |
FC≤ |
Fe2O3 |
|
F4~F90 P12~P100 |
98.6 |
0.20 |
0.40 |
|
F100~F150 P120~P150 |
98.10 |
0.25 |
0.50 |
|
F180~F220 P180~P220 |
97.20 |
0.30 |
0.55 |
|
F230~F280 P240~P360 |
97.20 |
0.30 |
0.55 |
|
F320~F500 P400~P1000 |
97 |
0.35 |
0.60 |
|
F600~F800 P200~P1500 |
96.5 |
0.40 |
0.60 |
|
F1000~F1200 P2000~P2500 |
95.5 |
0.50 |
0.70 |
|
F4~F90 P12~P100 |
99.10 |
0.20 |
0.20 |
|
F100~F150 P120~P150 |
98.6 |
0.25 |
0.45 |
|
F180~F220 P180~P220 |
98.00 |
0.25 |
0.50 |
|
F230~F280 P240~P360 |
98.00 |
0.30 |
0.50 |
|
F320~F500 P400~P1000 |
97.50 |
0.30 |
0.50 |
|
F600~F800 P200~P1500 |
97.00 |
0.35 |
0.50 |
|
F1000~F1200 P2000~P2500 |
96.50 |
0.40 |
0.50 |
|
particle size range |
SiC%≥ |
FC%≤ |
Fe2O3%≤ |
|
F4~F90 P12~P100 |
98.10 |
0.25 |
0.50 |
|
F100~F150 P120~P150 |
97.60 |
0.30 |
0.60 |
|
F180~F220 P180~P220 |
96.70 |
0.35 |
0.65 |
|
F230~F280 P240~P360 |
96.70 |
0.35 |
0.65 |
|
F320~F500 P400~P1000 |
96.50 |
0.40 |
0.70 |
|
F600~F800 P200~P1500 |
96.00 |
0.45 |
0.70 |
|
F1000~F1200 P2000~P2500 |
95.00 |
0.55 |
0.80 |
|
F4~F90 P12~P100 |
98.00 |
0.25 |
0.25 |
|
F100~F150 P120~P150 |
98.10 |
0.30 |
0.50 |
|
F180~F220 P180~P220 |
97.50 |
0.30 |
0.60 |
|
F230~F280 P240~P360 |
97.50 |
0.35 |
0.60 |
|
F320~F500 P400~P1000 |
97.00 |
0.35 |
0.60 |
|
F600~F800 P200~P1500 |
96.50 |
0.40 |
0.65 |
|
F1000~F1200 P2000~P2500 |
96.00 |
0.45 |
0.65 |
Silicon carbide uses
1. Main use: used for wire cutting of 3-12 inch monocrystalline silicon, polycrystalline silicon, potassium arsenide, quartz crystal, etc. Solar photovoltaic industry, semiconductor industry, piezoelectric crystal industry engineering processing materials.
2. Chemical industry, abrasives industry, steel industry, etc.
Silicon carbide is also called moissanite. Among contemporary C, N, B and other non-oxide high-tech refractory raw materials, silicon carbide is the most widely used and most economical one, which can be called gold steel sand or refractory sand. At present, China's industrially produced silicon carbide is divided into two types: black silicon carbide and green silicon carbide, both of which are hexagonal crystals with a specific gravity of 3.20-3.25 and a microhardness of 2840-3320kg/mm2.
Acid resistant refractory gunning material is used for spraying of blast furnaces, hot blast stoves, hot blast pipes, flue protection layers, working layers, etc.
The refractoriness of clay bricks is comparable to that of silica bricks, up to 1690~1730℃, but the softening temperature under load is more than 200℃ lower than that of silica bricks. Because in addition to the high refractory mullite crystal, the clay brick also contains nearly half of the low melting point amorphous glass phase.
Insulating fire brick is a new type of building material synthesized with polymer materials. The main function is to keep warm, reduce heat loss and improve thermal efficiency.
The alumina ball is also called the high aluminum accumulation of heat ball.High alumina refractory ball is based on bauxite as the mainly raw refractory material.Adding powder and additives and anchoring agent.After proportioning, molding and high sintering to make it.The production engineering of high alumina refractory ball is similar to that of high alumina refractory brick.It should be based on the properties of raw materials,high alumina refractory ball requires production conditions and other factors to determine.
High alumina brick is mainly used for lining of blast furnace, hot blast furnace, electric furnace roof, reverberatory furnace and rotary kiln. In addition, high alumina brick also widely used as open hearth regenerative lattice brick, pouring system with plug,such as nozzle brick.
Refractory carstables for ladles is made of high-purity fused corundum as the main material, high-purity spinel is added to the matrix, and an appropriate amount of binder and admixture (dispersant, water reducing agent) are added.
Brown corundum is made of natural bauxite as raw material, carbon (mainly coke) is used as reducing agent, and iron filings are added as sedimentation agent (clarifier) to form ferrosilicon deposited on the bottom of electric furnace.
low porosity clay bricks are mainly used in the regenerators of glass kilns. They can also be used in blast furnaces and hot blast furnaces in the steel industry; cement kilns in the building materials industry; chemical kilns in the chemical industry as kiln linings

