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焦炭的反應性及反應後的強度

发布时间：2012-04-26 点击次数：1241次

焦炭反應性與二氧化碳、氧和水蒸氣等進行化學反應的能力，焦炭反應後強度是指反應後的焦炭再機械力和熱應力作用下抵抗破碎和磨損的能力。焦炭在高爐煉鐵、鑄造化鐵和固定床氣化過程中，都要與二氧化碳、氧和水蒸氣發生化學反應。由于焦與氧和水蒸氣費反應與有二氧化碳的反應類似的規律，因此大多數國家都用焦炭與二氧化碳間的反應特性評定焦炭反應性。

中国标准（GBT4000-1996）规定了焦炭反应性及反应后强度试验方法。其做法是使焦炭在高温下与二氧化碳发生反应，然后测定反应后焦炭失重率及其机械强度。焦炭反应性CRI及反映后强度CSR的重复性r不得超过下列数据：

CRIr≤2.4%

CSR≤3.2%

焦炭反應性及反應後強度的試驗結果均取平行試驗結果的算術平均值

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