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用硅质煤矸石作原料 ,以Acheson工艺合成了SiC ,与传统原料相比其反应速度快且反应温度低 .SEM研究表明 ,硅质煤矸石的微观结构是直径小于 10 μm的球状SiO2 包容于厚度小于 5μm的碳有机质薄壳中 .通过对硅质煤矸石合成SiC反应机理的研究 ,认为其微观结构适于SiC在较低温度下快速彻底地进行合成反应 .工业Acheson法电热合成SiC时 ,以煤矸石代替石英砂和大部分价格较高或资源较匮乏、含硫挥发分较高的石油焦碳和无烟煤 ,可实现废弃物资源化和污染控制 ,并且有利于节能降耗和降低原料成本 .
Silica gangue is used as raw material to synthesize SiC by Acheson process, which has faster reaction rate and lower reaction temperature compared with traditional raw materials.SEM study shows that the microstructure of siliceous gangue is spherical SiO2 less than 10 μm in diameter, The thickness of less than 5μm carbon organic thin shell.Through the silica synthesis of the reaction mechanism of coal gangue that the microstructure suitable for SiC at a relatively low temperature synthesis reaction quickly and completely.Industrial Acheson method of electrothermal synthesis of SiC, Coal gangue instead of quartz sand and most of the higher prices or more scarce resources, high sulfur volatile petroleum coke and anthracite, waste can achieve resource recycling and pollution control, and is conducive to saving energy and reducing raw material costs .