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前言我国熔炼铸铁用的焦炭都是冶金焦、煤气焦或地方土焦。由于这类焦炭的灰分高,固定碳低,强度差,块度小,反应能力强等,因此,铁水温度低,造成铸件显微组织差、机械性能低、废品率高,从而影响了机械产品的质量。因此,机械行业曾多次要求国家组织生产铸造焦炭,以获得高温优质铁水,为提高铸铁件质量
Preface China’s smelting iron with coke are metallurgical coke, gas coke or local coke. Due to the high ash content of this type of coke, low fixed carbon, poor strength, small block size, strong reaction ability and so on, the hot metal temperature is low, resulting in poor microstructure, low mechanical properties and high rejection rate, which affects the mechanical products the quality of. Therefore, the machinery industry has repeatedly asked the state organizations to produce cast coke, in order to obtain high-temperature high-quality hot metal, in order to improve the quality of iron castings