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The methods of manual dynamic regulation of bottom blowing of converter with steel grade of smelting and dynamic maintenance of furnace profile are proposed aiming at such problems as low gas supply intensity of bottom blowing, short service life of breathable element for bottom blowing and lower combined blowing rate for 150 t top bottom combined blowing converter in Steel-making Plant. Different gas supply intensity models are established and gas supply intensity of bottom blowing is optimized based on the requirements for end point carbon content of steel grade in actual production. As a result, the dynamic control of gas supply intensity of bottom blowing for smelting different steel grades is realized, iron oxide content of final slag of converter and end point product of carbon concentration and oxygen concentration are effectively reduced as well as metallurgical effects of bottom blowing system and quality of molten steel are improved.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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