Making blast-furnace smelting more efficient through the injection of heated natural gas
| Autor: | A. A. Lapshin, S. A. Feshchenko, V. N. Loginov, K. N. Soveiko, L. E. Vasil’ev, B. N. Lizunov, V. I. Pleshkov |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Metallurgist. 51:605-611 |
| ISSN: | 1573-8892 0026-0894 |
| DOI: | 10.1007/s11015-007-0110-5 |
| Popis: | Subjecting natural gas to multi-stage heating by passing it through the cooled cavities of certain tuyere elements instead of coolant water is technically simple to accomplish and makes it possible to heat the gas to 300°C or more, the exact temperature depending on the amount of gas used. The cost of instituting this technology is an order of magnitude lower than the savings realized by injecting heated natural gas into blast furnaces. The injection of heated natural gas into a blast furnace introduces additional heat into the furnace and makes it possible to use more natural gas in the smelting process without reducing the theoretical combustion temperature. It also increases the value of the coefficient that characterizes the replacement of coke by natural gas, since the gas undergoes more complete combustion in this case. Finally, the injection of heated natural gas results in a more uniform distribution of hydrogen across the furnace and allows fuller use of this element in the smelting operation. |
| Databáze: | OpenAIRE |
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