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现在日本每年约输入石油3亿吨,这些石油大半消耗于工业设备上,而用于工业炉方面的消耗占很大比重。由于石油供应紧张及涨价,因此节省能源有很大意义。虽然在大约十年前就试验研究了在工业炉内采用涂料以节省能源消耗,但从1973年石油危机后才开始大量地采用,到去年已有许多企业的燃油加热炉、热处理炉上采用了SiC涂料。 1 SiC涂料的省能原理工业炉的炉壁涂刷辐射率高的SiC涂料,使炉壁的黑度提高至接近完全黑度的0.96,因而提高了炉壁吸热和增加向被加热物的辐射率。表1是几种材料的表面辐射率。
Japan now imports about 300 million tons of oil a year, most of which is consumed by industrial equipment, while the consumption of industrial furnaces accounts for a large proportion. Because of tight oil supply and price hikes, it is of great significance to save energy. Although the use of paints in industrial furnaces to save energy was experimentally studied about a decade ago, it was not used in large quantities since the oil crisis of 1973, and until last year many of the enterprises used fuel-fired furnaces and heat-treatment furnaces SiC coating. 1 SiC coating energy-saving principle Industrial furnace wall brushing high emissivity SiC coating, the blackness of the furnace wall increased to nearly full blackness of 0.96, thereby increasing the furnace wall heat and increase the heat to be heated Emissivity. Table 1 is the surface emissivity of several materials.