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| Analysis on low carbon emission of blast furnace #br# with different raw materials structure |
| JIN Yonglong1，HE Zhijun2，WANG Chuan3 |
（1. Technology Research Institute， HBIS Group， Shijiazhuang 050023， Hebei， China；
2. School of Materials and Metallurgy， University of Science and Technology Liaoning，
Anshan 114016， Liaoning， China； 3. Swerim AB， Lule SE-971 25， Sweden） |
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Abstract The differences in structure characteristics of raw materials predominated by sinters or pellets were analyzed in order to realize low carbon emission at BF processes. Some operation parameters and production indexes with different raw materials structures all over the world were enumerated. The methods，i.e. test of metallurgical properties of raw materials，balance of materials and heat and the Rist operation line were utilized to analyze the low fuel consumption and low carbon emission in Baosteel BFs with the dominated ratio of sintering ore. At the same time，the comparable of SSAB Sweden BF with the pellet ore as the main materials were analyzed in details. According to results of analyzing in theory and calculation from the practical data，there is a highly significant correlation between the low fuel consumption ratio and the raw materials structure. A high grade of burden materials，a low slag volume and a high CO utilization ratio are the key factors to reduce the fuel consumption. During the practice in Baosteel，the carbon emission could be decreased by 8%-10% by reducing the fuel consumption ratio，while the BF of SSAB Sweden has lower fuels ratio that the carbon emission would be less. This research results would be benefit to operators of blast furnace for realizing the low carbon emission.
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