A refining method for LF-recycled steel scrap
By controlling the current and temperature of the LF furnace and optimizing the slag addition and steel chip addition rates, the arc-rushing problem when recovering precious metal steel chips in the LF furnace was solved, achieving safe and efficient recovery of alloying elements and improving recovery efficiency and economic value.
CN122081607APending Publication Date: 2026-05-26SGIS SONGSHAN CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SGIS SONGSHAN CO LTD
- Filing Date
- 2026-03-03
- Publication Date
- 2026-05-26
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Figure CN122081607A_ABST
Abstract
This invention relates to a refining method for LF (Leaf-Fuel) steel scrap. The refining method includes the following steps: tapping steel from the converter; after molten steel enters the LF furnace, power is supplied, and slag is added; after adding the slag, steel scrap containing precious metals is added according to the molten steel temperature t1. When 1520℃≤t1<1530℃, the rate of adding steel scrap is 270-310 kg / min; when 1530℃≤t1<1540℃, the rate of adding steel scrap is ≤410 kg / min; when 1540℃≤t1<1550℃, the rate of adding steel scrap is ≤510 kg / min; and when t1≥1550℃, the rate of adding steel scrap is ≤610 kg / min. This refining method can effectively recover precious alloying elements from steel scrap, achieving resource reuse. Furthermore, the process is safe, ensuring personal safety and protecting the integrity of production facilities and equipment, and is highly practical.
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