| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.13 ( September 1985 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Improvement of Coke Recovery Ratio in Blast Furnace Process Toshiro Sawada, Takanari Kawai, Yasunori Serizawa, Kazuo Okumura, Yoshinobu Shinozaki, Seiji Taguchi |
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Synopsis : A blast furnace plays roles of not only stable producing low-Si hot metal but also supplying the BF gas, which is strategically important in saving energy consumption at a steel mill. When No.3 New Power Plant at Chiba Works started operation, a great deal of low-cost BF gas had to be supplied to the power plant. For this purpose, a great importance was attached to the technique of generating the BF gas efficiently by burning coke in excess of its amount necessary for reducing and melting iron ore. This report describes the high coke-ratio operation test conducted under various conditions and the evaluation result of coke-energy efficiency in the blast furnace process. Even at the high coke-ratio operation, adjustments made on the heat input in front of the tuyere, on the charging distribution and on the increment bosh gas have proved that increases in Si content and in heat loss can be prevented, and an energy recovery efficiency of 70 to 80% can be achieved. |
| TextiPDF: 10p./476kbj |