97% SiC 碳化硅骨料澆注料用于工業(yè)窯爐

碳化硅（Silicon Carbide）的分子式是SiC，是由石油焦和硅砂經(jīng)過(guò)高溫電阻爐熔煉而來(lái)的非金屬材料。它通常作為研磨材料使用，但是由于它具有很高的耐火穩(wěn)定，良好的高溫穩(wěn)定性、高溫抗渣性、良好的脫氧還原性等優(yōu)點(diǎn)，廣泛用于鑄鐵和球墨鑄鐵的生產(chǎn)，在鑄造鋼鐵前作為預(yù)處理劑使用，提高鑄鐵的性能和質(zhì)量。通常添加85-90%含量的碳化硅到灰鑄鐵的鑄造中，添加97-98%含量的碳化硅到球墨鑄鐵的鑄造熔煉中。

鑄造用碳化硅的熔點(diǎn)高達(dá)2700℃,在感應(yīng)爐熔煉鑄鐵的過(guò)程中，不會(huì)在高溫的鐵液中融化，而是熔煉于鑄鐵中。碳化硅的添加，可以提高碳當(dāng)量、充當(dāng)脫氧劑加強(qiáng)鐵液的還原性、防止碳化物的析出、提高鑄鐵的致密性、增加球墨鑄鐵的石墨球化率，提高鑄鐵的質(zhì)量。

97% SiC 碳化硅骨料澆注料用于工業(yè)窯爐的作用：

1. 碳化硅加入鐵液后可以轉(zhuǎn)化為鑄鐵中的碳和硅，提高碳當(dāng)量。

2. 碳化硅在鐵液中分解的碳和硅比鐵液本身的碳和硅的內(nèi)能大，鐵液中本身的碳不會(huì)析出，不能產(chǎn)生脫氧的作用，而碳化硅中的碳可以達(dá)到脫氧還原的作用。

3. 碳化硅的脫氧作用有利于石墨形核，能提高鑄鐵的加工性能和力學(xué)性能。

4. 鑄鐵加入碳化硅，對(duì)于灰鑄鐵，可以提高石墨化程度減少白口傾向，提高鑄鐵的力學(xué)性能；對(duì)于球墨鑄鐵，可以增加石墨球數(shù)，提高球化率。

5. 碳化硅脫氧作用產(chǎn)生的脫氧產(chǎn)物在鐵液中會(huì)發(fā)生冶金反應(yīng)，減少蝕繡爐料中氧化物的有害影響，達(dá)到凈化鐵液的作用。

Refractory 97% silicon carbide castable and aggregate

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 97% silicon carbide castable and aggregate 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.

97% SiC 碳化硅骨料澆注料用于工業(yè)窯爐的物理性能：

97% SiC 碳化硅骨料澆注料用于工業(yè)窯爐的化學(xué)指標(biāo)：

黑碳化硅化學(xué)成分：

冶金鑄造用黑碳化硅的型號(hào)粒度:

粒度砂：

段砂：

0-10mm，0-5mm，1-10mm，1-5mm等。