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DESULFURIZATION METHOD OF MOLTEN PIG IRON USING COMBINATION OF MECHANICAL STIRRING AND GAS STIRRING
DESULFURIZATION METHOD OF MOLTEN PIG IRON USING COMBINATION OF MECHANICAL STIRRING AND GAS STIRRING
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机译:机械搅拌与气体搅拌相结合的熔融猪铁脱硫方法
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摘要
PROBLEM TO BE SOLVED: To achieve rapid desulfurization to a low sulfur range by enhancing reaction efficiency of a desulfurizing agent without causing operation inhibition using combination of stirring by an impeller and stirring by gas.;SOLUTION: Desulfurization treatment is performed under the condition that: a basic unit of CaO of a desulfurizing agent is 5 kg/t or more; a refining vessel diameter D, a blade diameter d and a nozzle position P satisfy "d/2PD/2"; the number of nozzles n and a central angle θ of neighboring nozzles satisfy "360/n-30≤θ≤360/n+30" ; a depth of molten iron Hm, a height of an impeller b and an immersion position of the impeller h satisfy "0.2≤h/Hm1-b/Hm" ; a maximum gas flow rate Qg,max and a minimum gas flow rate of the gas Qg,min satisfy "1≤Qg,max/Qg,min≤2" ; a stirring power density by the impeller εi and a stirring power density by gas εg satisfy "0.012≤εg/εi≤0.15"; and the desulfurization treatment is performed while blowing gas into the molten pig iron when the desulfurizing agent is not added thereto.;COPYRIGHT: (C)2016,JPO&INPIT
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机译:要解决的问题:为了提高脱硫剂的反应效率,以达到快速脱硫至低硫范围的目的,而不会通过使用叶轮搅拌和气体搅拌相结合而引起操作抑制;解决方案:脱硫处理在以下条件下进行:脱硫剂的CaO的基本单位为5kg / t以上。精制容器直径D,叶片直径d和喷嘴位置P满足“ d / 2 <P <D / 2”。喷嘴数量n和相邻喷嘴的中心角θ满足“ 360 /n-30≤θ≤360/ n + 30”;铁水的深度H m Sub>,叶轮的高度b和叶轮的浸入位置h满足“0.2≤h/ H m Sub> <1-b / H m Sub>”;最大气体流量Q g,max Sub>和最小气体流量Q g,min Sub>满足“1≤Q g,max Sub> > / Q g,min Sub>≤2“;叶轮ε i Sub>的搅拌功率密度和气体ε g Sub>的搅拌功率密度满足“0.012≤ε g Sub> /ε i Sub>≤0.15“;不添加脱硫剂的同时向熔融生铁中吹入气体的同时进行脱硫处理。; COPYRIGHT:(C)2016,JPO&INPIT
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