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| Exploration and application of pelletizing technology under new burden structure of blast furnace in Shougang |
| HU Chang-song1,2 |
1. Beijing Shougang International Engineering Technology Co., Ltd., Beijing 10043, China;
2. Beijing Metallurgical 3-D Simulation Design Engineering Technology Research Center, Beijing 100043, China |
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Abstract Based on the large-scale pelletized ore charge structure of the blast furnace of Shougang Jingtang Iron and Steel Plant, taking the Jingtang second-phase pellet straight grate induration furnace production line as the research object, the innovation and advantages of the straight grate induration furnace process and equipment under the large-scale pelletized ore charge structure of Shougang Jingtang blast furnace are explained in terms of experimental research and process equipment. The production practice results showed that ultra-low silicon high-basicity pellets were produced, the average daily output of the two lines was 12 500 t, the basicity was 1.1-1.2, the SiO2 mass fraction was 2.0%, the TFe grade was 66.0%, the compressive strength was above 3 100 N/P, and the reduction expansion rate was 17.5%. The pellets were used in three 5 500 m3 blast furnaces in a high proportion, the proportion of entering the furnace reached 55%, the amount of blast furnace slag was reduced from 280 to less than 215 kg/t, and the fuel ratio was reduced from 505 to 483 kg/t. Significant economic social and environmental benefits are achieved, and the promotion and application prospects are broad.
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Received: 10 October 2020
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2021, Vol. 31 
