Journal
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
Volume 20, Issue 5, Pages 24-27Publisher
JOURNAL IRON STEEL RESEARCH EDITORIAL BOARD
DOI: 10.1016/S1006-706X(13)60092-8
Keywords
red mud; direct reduction; orthogonal experiment; resource utilization; nugget
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Funding
- National Science and Technology Support Plan of China [2012BAB14B00]
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In order to utilize the iron resource effectively in red mud, a laboratory experiment based on the orthogonal method was carried out. Nuggets were gotten by directly reducing the carbon-bearing pellets of red mud and coal. The results showed that the strongest influencing factor is temperature, and the separation between liquid iron and slag is thoroughly. The nuggets can be gotten when the pellets, in which x(c)/x(0) is 1.6 and the basicity is 1.0, were maintained in 30 min at 1 400 degrees C. The nuggets have a high TFe content which is higher than that in the hot metal produced in BF. It also has a low content of Si and Mn, but a high content of S and P. The main compositions of the slag are amorphous phase mainly containing SiO2 and unreduced Fe2SiO4. Of course, a little reduced iron retains in it.
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