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一、三孔喷氧管的发展现状大容量转炉在供氧时间上比小容量转炉增加有限,这样,大容量转炉的精炼速度和单位时间供氧量,就必然要大大高于小容量转炉。例如一座30吨容量转炉的每分钟供氧量为80米~3左右,而一座300吨容量转炉则高达670米~3以上,在较高供氧速度下,如仍采用单孔喷氧管操作,由于氧流喷射动能有很大增加,氧流与钢液面相作用的火点面积也比较小,会造成金属喷损增加、操作恶化以及炉底受到损伤等不良后果。为解决此问题,早些时候曾经试验用过两种解决方法:一种为高喷枪、低氧压操作(例如美国克利夫兰厂200吨转炉曾用过5大气压吹炼),但是提枪、降压是有限度的,过分
First, the status of the development of three-hole oxygen tube Large-capacity converter in the oxygen supply time than the small-capacity converter increase is limited, so that the refining capacity of large-capacity converter and oxygen supply per unit time, it is bound to be much higher than the small capacity converter. For example, a 30-ton capacity converter has an oxygen supply rate of about 80 to 3 meters per minute, while a 300-ton capacity converter has a capacity of 670 to 3 above. If the oxygen supply rate is still high, , Due to the great increase of kinetic energy of jet of oxygen, the area of the fire point where the oxygen flow interacts with the liquid surface of the molten steel is also relatively small, which may cause adverse effects such as increased metal spray loss, deteriorated operation and damage to the hearth. In order to solve this problem, two solutions have been tested earlier: one is a high spray gun, low oxygen pressure operation (for example, the United States Cleveland plant used 200 tons of 5-atmospheric pressure blower), but the gun, buck There is a limit, too much