| 摘要 |
<p><PICT:1076502/C6-C7/1> In a duplex melting and refining furnace, scrap in chamber 2 is heated by waste gases from chamber 1 and by a transverse row of oil or gas burners 19, preheated air from a recuperator entering through duct 18. The molten bath in chamber 2 is heated by a row of oxy-fuel burners 21 and after the refined charge in this chamber has been replaced by a new charge, the latter is heated by air-fuel burners 20 and chamber 2 by oxy-fuel burners 22. In the melting/refining chamber at least 65% of the fuel is burnt with O2 and the rest with preheated air, and in the preheating chamber at least 65% of the fuel is burnt with preheated air and the rest with O2.</p> |
