Full
Outline
Through the analysis of w (FeO) change in top slag of silicon steel, it is concluded that the converter tapping of silicon steel is not completely deoxidized, which leads to the transmission of oxygen from steel to slag, and it is the main reason for poor effect in top slag modification of steel ladle in converter process. Through two-step top slag modification, the one is top slag modification of steel ladle in converter process, the other one is top slag modification of steel ladle in RH process, and taking the technical measure of alloying of manganese before RH decarburization, the w (FeO) in RH top slag of steel ladle for ultra-low carbon steel can be reduced to less than 5%, and the w (MnO) shall be controlled at about 4%, and the w [O] T in tundish molten steel shall be controlled below 20 × 10-6, through which the cleanliness of ultra-low carbon steel will be remarkably 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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