发明名称 |
PERFECTIONNEMENTS A LA FABRICATION DE L'ACIER. |
摘要 |
<p>1311290 Reduction of iron ore SVENSKA KULLAGERFABRIKEN AB 24 March 1970 [26 March 1969] 14171/70 Heading C7D [Also in Division F4] Iron ore in the form of concentrates or pellets are reduced in two stages. Using the apparatus shown in Fig. 1 final reduction and melting of a pre-reduced charge is carried out in electrode furnace 2, a hydrocarbon gas such as liquified petroleum gas and steam being introduced through pipes 10 to provide the reducing atmosphere. The exhaust gases pass through duct 5 to furnace 1 which is filled with a scrap charge. One added from hopper 12 meets the incoming gas and is pre-reduced and deposits on the scrap as the gas passes downwardly therethrough to gas unit 6. When the operation in furnace 2 is finished and the melt tapped the functions of the furnaces are reversed, the electrode arch 3 and electrode free arch 4 being interchanged. Furnace 1 becomes a melting furnace while furnace 2 is charged with scrap to act as a pre-reduction furnace.</p> |
申请公布号 |
BE748011(A1) |
申请公布日期 |
1970.08.31 |
申请号 |
BED748011 |
申请日期 |
1970.03.26 |
申请人 |
AB SVENSKA KULLAGERFABRIKEN, A HALLEFORS, (SUEDE), |
发明人 |
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分类号 |
C21C5/56;C21B13/14;C21C5/52;C21C7/00;(IPC1-7):21B/ |
主分类号 |
C21C5/56 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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