焦煤

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生产焦炭的焦煤(coking coal),也称作冶金煤,属于烟煤或次烟煤。或用多种煤炭配比混合后炼焦。焦煤在炼焦炉中隔绝氧气经过1,000°C干馏后,可挥发成分已经去除,剩余的固态物质即焦炭。由于炼铁需要尽可能少的硫、磷雜質,所以应选择低硫低磷的焦煤。



分類


国际上一般把焦煤分为六种:


  • 优质硬焦煤

  • 标准硬焦煤

  • 半硬焦煤

  • 半软焦煤

  • 低挥发分喷吹煤

  • 高挥发分喷吹煤。

中国的焦煤分类(GB5751-1986)为:


  • 弱粘煤(weak-sticky coal)

  • 1/2中粘煤(1/2 middle sticky coal)

  • 气煤(gas coal)

  • 气肥煤(gas fat coal)

  • 1/3焦煤(1/3 coking coal)

  • 肥煤(fat coal)

  • 焦煤(primary coking coal)

  • 瘦煤(lean coal)

  • 贫瘦煤(meager lean coal)

  • 贫煤(meager coal)

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