| Customization: | Available |
|---|---|
| Natural Abrasive Type: | Natural Corundum |
| Artificial Abrasive Type: | Silicon Carbide Abrasive |
|
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Physical and Chemical Properties:
| Color | Black |
| Mohs Hardness | 9.5 |
| True Density | 3.9g/cm3 |
| Melting Point | 2250°C |
| Maximum service temperature | 1900°C |
|
Properties and Type |
Grains | ||
| 8# 10# 12# 14# 16# 20# 22# 24# 30# 36# 40# 46# 54# 60# 70# 80# 90# 100# 120# 150# 180# 220# | |||
| Guarantee Value | Typical Value | ||
| Chemical Composition | SIC | ≥98 | 98.5 |
| F.C | ≤0.2 | 0.1 | |
| Fe2O3 | ≤0.2 | 0.15 | |
| H2O3 | ≤1 | 0.3 | |
Application
Bonded & Industrial AbrasivesCoated Abrasives Refractories & Ceramics
Production process
Silicon carbide (SiC) is an important abrasive because of its great hardness, but its range of applications exceeds that of ordinary abrasives. For example, its high temperature resistance and thermal conductivity make it one of the preferred kiln materials for tunnel or shuttle kilns, and its electrical conductivity makes it an important electrical heating element.
The first step in the preparation of SiC products is to prepare SiC smelting blocks [or: SiC granules, which were once known as: adamantine because they contained C and were super hard. However, it is important to note that it has a different composition to natural adamantine (also known as: garnet). In industrial production, SiC smelting blocks are usually made of quartz, petroleum coke and other raw materials, auxiliary recycling materials, spent materials, after grinding and other processes to become a reasonable proportion and particle size of the appropriate furnace material (in order to adjust the permeability of the furnace material need to add the right amount of wood chips, the preparation of green silicon carbide also add the right amount of salt) prepared by high temperature.
High-temperature preparation of SiC smelting block of thermal equipment is a special silicon carbide electric furnace, its structure by the bottom of the furnace, the inner surface of the end wall set with electrodes, removable side walls, furnace core body (full name: the centre of the electric furnace energized heating body, generally with graphite powder or petroleum coke according to a certain shape and size installed in the centre of the charge, generally round or rectangular. Its two ends are connected to the electrode) and other components. The firing method used in this electric furnace is commonly known as: buried powder firing. It is a power on that is the beginning of heating, furnace core body temperature of about 2500 ºC, or even higher (2600 ~ 2700 ºC), the furnace material to 1450 ºC when the synthesis of SiC (but SiC is mainly in ≥ 1800 ºC when the formation), and the release of co. However, ≥ 2600 ºC SiC will decompose, but the decomposition of si and furnace material in the C generation of SiC. each group of electric furnace equipped with a group of transformers, but only a single furnace is powered during production so that the voltage can be adjusted according to the characteristics of the electrical load to maintain essentially constant power. high-powered electric furnaces have to be heated for about 24 h. After a power failure the reaction to generate SiC is basically over, and then after a period of cooling the side walls can be removed and the charge can then be gradually removed.
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