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.
Silica brick: an acidic refractory mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phases. Its silica content is more than 94%, it has anti-acid slag erosion performance, high high temperature strength, high load softening temperature, long-term use in high temperature flower wells without deformation, but low thermal shock stability (heat exchange in water is 1-4 Second-rate).
Refractory ramming mass (refractory taphole mass) is a kind of Refractory used for lining of blast furnace tapping groove. It is mainly used to protect the blast furnace out of the ditch from high-temperature hot metal and slag erosion and erosion, and has excellent high-temperature resistance and wear resistance. The ramming material for the iron discharge ditch is usually composed of corundum, silicon carbide and carbonaceous material, which has the ability of resisting hot metal and molten slag erosion and scouring, reburning line change small, strong resistance to a variety of oxidation characteristics. The construction of the ramming material for the iron ditch is convenient, easy to dismantle and repair, does not produce harmful gas, and is beneficial to environmental protection.
Coke furnace silicon bricks are mainly used in the heat storage room, oblique road, charcoal room, combustion room, top of the furnace, and bottom of the furnace.
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.
Silicon carbide castables mainly use 98 silicon carbide as the main raw material, add water reducing agent and micropowder, and use pure calcium aluminate cement as binder to make amorphous refractory materials. Cupola and other high temperature materials to be recorded.
Anti stripping high alumina bricks are referred to as anti-stripping bricks or anti-stripping refractory bricks. Anti-stripping high-alumina bricks are widely used in my country's new dry process kiln, Libore kiln and wet process kiln, including kiln door cover, rising flue, cooling zone, decomposition zone, safety belt, transition zone, coolant rear Walls and side walls and beams with curved ceilings.
The high-alumina bricks are mainly used in the regenerator of the hot blast stove. The lattice bricks with a certain structure are arranged in an orderly manner, and the upper and lower through holes of the lattice bricks can allow the gas to pass through.
Yuying Refractory produces a complete set of refractories for electrolyzers, and the new impermeable bricks are used in conjunction with impermeable castables

