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在60kg复吹转炉热模上用三种规格的六只套管式底枪进行了36炉试验。着重研究了合适的天然气比,同时探讨了底枪结构、供气参数等因素对底枪寿命的影响。试验发现:(1)当天然气比大于16％时,底枪熔损速度小于1mm/炉,由此确定试验条件下的合适天然气比为16％;(2)在保证一定的天然气比的前提下,采用窄环缝枪可以提高底枪寿命;(3)从试验结果的趋势看,如果环缝宽度达到设计要求,16％的“合适天然气比”是可以降低的;(4)在不击穿熔池的前提下,提高底枪气压力,有利于把火点区推离炉底,从而使底枪熔损速度降低,寿命提高。
In the 60kg blown BOF thermal model with three sizes of six casing-type guns carried out 36 furnace test. Focus on the appropriate natural gas ratio, at the same time to explore the structure of the gun, gas supply parameters and other factors on the life of the gun. It is found that: (1) When the natural gas ratio is more than 16%, the rate of melting at the bottom gun is less than 1mm / furnace, thus determining the appropriate natural gas ratio under the test conditions is 16%; (2) On the premise of ensuring a certain natural gas ratio (3) From the trend of test results, 16% of “proper natural gas ratio” can be reduced if the girth width meets the design requirements; (4) In case of no breakdown Under the premise of the molten pool, raising the pressure of the gas at the bottom of the gun is beneficial to push the fire area away from the bottom of the furnace so as to reduce the speed of melting and lightening of the bottom gun and increase the service life.