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含碳鉻礦球團的造球及直接還原

Balling and Direct Reducing Experiments of Carbon-Bearing Chromite Powder

  • 摘要: 研究了原料粒度、粘結劑的用量、配碳量等因素對鉻鐵礦球團生球性能的影響,以及溫度和還原時間對金屬化率的影響。結果表明1350℃還原15min,鉻金屬化率達90%以上配碳量應比理論配碳量過量20%。用1:3的H2SO4對還原球團采用加熱回流法溶樣,解決了金屬鉻及金屬鐵的化學分析方法。

     

    Abstract: Balling and reducing experiments of carbon-bearing chromite powder were carried out in laboratory. The effect of grain size of raw materials, amount of binder and carbon and other factors on the green pellet properties and the influence of reducing temperature and time on the metallization rate of carbon bearing chromite pellet were investigated. The results shown that the metallization rate of carbon-bearing chromite pellet of up to 90% under the reducing temperature of 1350℃, reducing time of 15 minutes, the amount of carbon exceed the the theoretical carbon requirement by 20%. By using heating reflux method and 1:3 H2SO4, the chemical analysing of metallic Cr and Fe becomes easier.

     

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