含碳铬矿球团的造球及直接还原

Balling and Direct Reducing Experiments of Carbon-Bearing Chromite Powder

研究了原料粒度、粘结剂的用量、配碳量等因素对铬铁矿球团生球性能的影响，以及温度和还原时间对金属化率的影响。结果表明１３５０℃还原１５ｍｉｎ，铬金属化率达９０％以上配碳量应比理论配碳量过量２０％。用１：３的Ｈ２Ｓ０４对还原球团采用加热回流法溶样，解决了金属铬及金属铁的化学分析方法。

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 H_2SO_4, the chemical analysing of metallic Cr and Fe becomes easier.