碳酸钠冲罐法铁水脱硫试验与分析  

Practice and analysis on hot metal desulfurization method by scouring pot with soda ash

作　　者：张建良[1] 姜喆[1] 代兵[1] 闫炳基[1] 胡正文[1] 曹明明[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《炼钢》2012年第4期36-39,共4页Steelmaking

基　　金：国家科技支撑计划资助项目(2008BAB32B05)

摘　　要：介绍了以碳酸钠为脱硫剂,采用铁水冲罐法进行脱硫的试验。考察了铁水温度、碳酸钠消耗量和喷吹氧气对脱硫效果的影响,并比较了碳酸钠与氧化钠的脱硫和脱磷效果。试验结果表明铁水温度为(1 350±20)℃,碳酸钠消耗量为15 kg/t时有助于脱硫;与氧化钠具有较高的脱硫和较低的脱磷能力相比,碳酸钠有适中的脱磷和脱硫能力;向铁水表面喷吹氧气可以减少铁水温降,由于增加了铁水和渣中的氧势,脱硫能力显著降低。还考察了碳酸钠脱磷过程中铁水的铬、钒和碳含量的变化情况,铬含量几乎不变,钒几乎全部被氧化进入渣中,而w(C)大约减小了0.2%。The present paper introduces tests on the hot metal desulfurization by scou- ring the pot with hot metal using the soda ash as the desulfurization agent. The effects of hot metal temperature, consumption of soda and oxygen blow on the desulphurization are investigated and at the same time the desulphurization effect between Na2CO3 and Na20 are compared with each other. Experiment results show that temperature range of （1 350±20） ℃and soda ash consumption of 15 kg/t are proper processing parameters for hot metal desulphurization. In comparison with Na20 in possession of higher desul- phurization ability and lower dephosphorization ability Na2 CO~ strikes a good balance between dephosporization ability and desulphurization ability. Although oxygen blow on the surface of the hot metal can prevent against temperature drop of the hot metal, yet the desulphurization ability is prominently reduced because of increase of oxygen poten- tial in the hot metal and slag. Changes of chromium, vanadium and carbon contents in the hot metal in the process of dephosphorization by Na2CO3 are also studied. Results show that change of chromium in the hot metal can hardly be seen and almost all vanadi- um is oxidized and solved in the slag and w（C） is probably reduced by 0.2 %.

关 键 词：碳酸钠 铁水冲罐法 脱硫 脱磷 

分 类 号：TF535.2[冶金工程—钢铁冶金]