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88含量黑碳化硅段砂0-10mm 1-10mm

碳化硅（Silicon Carbide）的分子式是SiC，是由石油焦和硅砂经过高温电阻炉熔炼而来的非金属材料。它通常作为研磨材料使用，但是由于它具有很高的耐火稳定，良好的高温稳定性、高温抗渣性、良好的脱氧还原性等优点，广泛用于铸铁和球墨铸铁的生产，在铸造钢铁前作为预处理剂使用，提高铸铁的性能和质量。通常添加85-90%含量的碳化硅到灰铸铁的铸造中，添加97-98%含量的碳化硅到球墨铸铁的铸造熔炼中。

铸造用碳化硅的熔点高达2700℃,在感应炉熔炼铸铁的过程中，不会在高温的铁液中融化，而是熔炼于铸铁中。碳化硅的添加，可以提高碳当量、充当脱氧剂加强铁液的还原性、防止碳化物的析出、提高铸铁的致密性、增加球墨铸铁的石墨球化率，提高铸铁的质量。

88含量黑碳化硅段砂0-10mm 1-10mm的作用：

1.碳化硅加入铁液后可以转化为铸铁中的碳和硅，提高碳当量。

2.碳化硅在铁液中分解的碳和硅比铁液本身的碳和硅的内能大，铁液中本身的碳不会析出，不能产生脱氧的作用，而碳化硅中的碳可以达到脱氧还原的作用。

3.碳化硅的脱氧作用有利于石墨形核，能提高铸铁的加工性能和力学性能。

4.铸铁加入碳化硅，对于灰铸铁，可以提高石墨化程度减少白口倾向，提高铸铁的力学性能；对于球墨铸铁，可以增加石墨球数，提高球化率。

5.碳化硅脱氧作用产生的脱氧产物在铁液中会发生冶金反应，减少蚀绣炉料中氧化物的有害影响，达到净化铁液的作用。

Refractory silicon carbide sand 0-10mm 1-10mm

Black silicon carbide sand is made by smelting quartz sand and petroleum coke in a resistance furnace at high temperature (about 2700 ℃). It is a black opaque body with a Mohs hardness of 9.2. Black silicon carbide has the characteristics of being fragile and sharp. Black silicon carbide has a high thermal conductivity, low thermal expansion rate, and excellent thermal shock resistance and corrosion resistance chemical stability.

Refractory silicon carbide sand 0-10mm 1-10mm Features:

1. Good wear resistance and wear resistance. Black silicon carbide itself is a good wear-resistant material. It can not only withstand the erosion of flowing high-temperature molten iron in the field of refractory materials, but also has high high-temperature thermal shock resistance. The Vickers hardness of silicon carbide at room temperature is 3100-3200kg/mm2, which slightly decreases at high temperatures. However, even at 1200 degrees, it can still maintain a microhardness of 950-1000kg/mm2.

2. High refractory temperature. The melting point of black silicon carbide is 2600 ℃. It is free at a high temperature of 2300 ℃, with a working temperature of up to 1850 ° C. It can maintain good high-temperature and physicochemical properties at a high temperature of 1600 ℃.

3. Oxidation resistance: When the black silicon carbide casting material is within 1400 ℃, a silicon dioxide film will be formed on the outside of the particles to prevent further oxidation of silicon carbide. Made into refractory products, they can resist the erosion of oxidizing media such as oxygen and water vapor.

4. Corrosion resistance: Black silicon carbide has excellent acid and alkali resistance. It can effectively resist the erosion of corrosive substances such as slag and metal oxides.

5. High thermal conductivity: Black Silicon carbide has good thermal conductivity, and the heat inside the furnace can be evenly distributed and quickly transmitted. Thus it improves the thermal efficiency of furnace equipment.

88含量黑碳化硅段砂0-10mm 1-10mm的物理性能：

88含量黑碳化硅段砂0-10mm 1-10mm的化学指标：

黑碳化硅化学成分：

冶金铸造用黑碳化硅的型号粒度:

粒度砂：

段砂：

0-10mm，0-5mm，1-10mm，1-5mm等。