A299 Grade A refining steel outside the furnace is a kind of steel productive process, during which the first step refined steel of the steel furnace/converter/electric furnace will be transferred to another steel productive container to refine again, namely , secondary metallurgy. Therefore, Steel making process is divided into two steps, smelting and refining. primary smelting: A299 Grade A steel will be in the oxydic primary smelting furnace for melting to decrease phosphorus, carbon elements and becoming alloying. Refining: the primary smelting steel of last step will be again refined in vacuum, inert or reducing atmosphere in the container for degassing, deoxidization, desulphurization and remove no needing inclusions and micro-tidying element percentage, etc.
The advantage of making the steel production divided into two steps: improving the A299 Grade A steel quality, shortening the time of smelting and simplifying the process and reducing the production cost.
According to the different methods of processing, A299 Grade A refining steel outside the furnace can be divided again to be two kinds: handle ladle refining outside the furnace and ladle refining outside the furnace, etc.
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