Process to produce low hydrogen steel by argon-oxygen decarburization.

摘要

A process to produce low-hydrogen steel by oxygen decarburization. The vessel containing the steel melt is dried, as well as the cooling gas to the tuyere. All slag-forming additions to the melt, their fluxing and the alloying additions to the melt are completed prior to the start of the decarburization.
<??>The flow rate of the gas mixture of oxygen and dilution gas during the decarburation step is sufficient, and sparging gas is injected during the finishing steps at a rate of at least 2.8 m<3>. per ton of metal.
<??>To generate and maintain off-gas flow preventing air from infiltrating into the vessel.
<??>By this technique a steel having a hydrogen content below 2 ppm may be obtained.