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公开(公告)号：US3674248A
公开(公告)日：1972-07-04
申请号：US3674248D
申请日：1970-10-09
CPC分类号： C21B7/16
摘要： Tuyeres and like articles employed to deliver fluids in extremely hot environments include an arrangement for their cooling comprising a conduit in the form of a coil having a plurality of turns for passing a cooling fluid through the article at high velocities. The conduit consists of an outer tubular member closed at one end to fluid flow and an inner tubular member located within the outer tubular member so as to form an annular passageway between the members. The tubular members are in fluid communication adjacent the closed end of the outer member. Cooling fluid introduced into the conduit first passes through the conduit along the annular passageway, enters the inner tubular member adjacent the closed end of the outer member, and passes through the inner tubular member to exit from the conduit.
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公开(公告)号：US3560197A
公开(公告)日：1971-02-02
申请号：US3560197D
申请日：1968-03-20
IPC分类号： C21B5/00
CPC分类号： C21B5/00
摘要： THE OPERATION OF A BLAST FURNACE IS CONTROLLED BY CHANGING THE MOISTURE LEVEL OF THE HOT BLAST IN RESPONSE TO VARIATIONS IN THE PEAK HOT TEMPERATURE FROM CAST TO CAST WITH RELATION TO AN AIM PEAK HOT METAL TEMPERATURE. BURDEN RATIO CHANGES ARE MADE AS THE HOT BLAST MOISTURE LEVEL REACHES PREDETERMINED MAXIMUM AND MINIMUM VALUES ALONG WITH EQUIVALENT MOISTURE CHANGES IN ORDER TO MAINTAIN THE MOISTURE LEVEL WITHIN A PREDETERMINED RANGE WITHOUT AFFECTING THE HOT METAL TEMPERATURE.
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