LF refining method under low iron-steel ratio
The invention discloses an LF refining method under a low iron-steel ratio, and relates to the technical field of metallurgy. The LF refining method under the low iron-steel ratio comprises the steps that after molten steel enters an LF furnace, argon is introduced to break slag shells; fluorite and...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses an LF refining method under a low iron-steel ratio, and relates to the technical field of metallurgy. The LF refining method under the low iron-steel ratio comprises the steps that after molten steel enters an LF furnace, argon is introduced to break slag shells; fluorite and lime are added, and low-gear electric slag feeding is carried out; the gear is shifted to a high gear higher than the low gear, and a steel bar head is added for continuous power transmission heating refining; adding of the steel bar head is stopped, and after whether the steel ladle absorbs heat to be saturated or not is judged, heating continues to be conducted at the current gear to the preset outbound temperature, and then outbound is conducted; wherein if the steel ladle absorbs heat and is saturated, the target outbound temperature is the preset outbound temperature, and if the steel ladle absorbs heat and is not saturated, the sum of the target outbound temperature and the steel ladle type compensation temp |
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