浅谈如何减少生产低碳低硅铝镇静钢时结晶器卷渣
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摘要
通过对低碳低硅铝镇静钢生产过程中结晶器卷渣机理进行分析,提出了稳定结晶器液位、防止水口堵塞、提高保护渣的熔速、黏度以及表面张力、保证合适的浇注温度和拉速、合理的耐材烘烤制度、选用合适的振幅和频率以及采用正确的加渣捞渣操作等技术措施,取得了控制夹渣的良好效果,使铸坯夹渣率从24.16%降低到2.62%,解决了结晶器卷渣问题。
Through analysis of the mechanism of mould slag entrapment in production of low-carbon low-silicon aluminum killed steel,various of technical measures were proposed,such as stabilizing the mould level,preventing the nozzle clogging,improving melting rate,viscosity and surface tension of the mould powder,ensuring a reasonable casting temperature and casting speed,using reasonable refractory baking method,adopting appropriate amplitude and frequency and using the correct operation method,etc. After that,the excellent results were gained,and the slag entrapment rate was reduced from 24.16% to 2.62%.
Through analysis of the mechanism of mould slag entrapment in production of low-carbon low-silicon aluminum killed steel,various of technical measures were proposed,such as stabilizing the mould level,preventing the nozzle clogging,improving melting rate,viscosity and surface tension of the mould powder,ensuring a reasonable casting temperature and casting speed,using reasonable refractory baking method,adopting appropriate amplitude and frequency and using the correct operation method,etc. After that,the excellent results were gained,and the slag entrapment rate was reduced from 24.16% to 2.62%.
引文
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[3]刘欣.C72DA钢生产过程中结晶器卷渣的原因分析与对策[J].山东冶金,2006,28(6):16.
[4]苏瑞先.连铸夹渣类缺陷的成因与控制措施[J].特殊钢,2011,32(1):27.
[5]Chang C-H,Jung I-H,Park S-C.Effect of Mg on the evolution of Non·metallic inclusions in Mn-Si-Ti deoxidized steel during solidification:experiments and thermodynamic calculations[J].Iron making and Steel-making,2005,32(3):252.
[6]王洪峰,李玉华.连铸坯皮下夹渣的控制技术[J].连铸,2011,增刊:367.
[7]张成勇.碳素结构钢铸坯皮下夹渣缺陷的分析与预防[J].钢铁研究,2010,38(增刊2):272.
[8]王文学,王雨,迟景.不锈钢连铸坯表面缺陷与对策[J].钢铁钒钛,2006,27(3):63.
[9]刁江,谢江,李玉刚,等.矩形坯连铸浸入式水口优化物理模拟[J].钢铁钒钛,2007,28(2):16.
[10]ZHANG Qiao-ying,WANG Shu-heng,WANG Li9tao,et al.Effects of wall thickness of SEN on liquid steel flow field and temperature field in mould[J].Steelmaking,2005,21(3):51.
[11]Lee Jungeui.3-dimensional mathematical mode for the analysis of continuous beam blank casting using body fitted coordinate system[J].ISIJ International,1998,38(2):132.
[12]单庆林,王保生,单伟,等.中碳低硅低铝镇静钢连铸浸入式水口堵塞的原因分析及解决措施[J].连铸,2016,41(3):14.
[13]单庆林,贾刘兵,彭国仲,等.超低碳钢热轧板卷渣缺陷研究[J].连铸,2016,31(4):55.
[14]李勇生.连铸坯表面夹渣的原因分析及解决措施[J].研究与应用,2008,150(6):23.
[15]龚伟,姜周华,战东平,等.消除合金结构钢连铸过程中夹渣的研究[J].钢铁,2006,41(4):33.
[16]马德刚,常金宝,李双武,等.含钛焊丝钢铝钛夹杂物控制及连铸水口结瘤机理研究[J].宝钢技术,2013,B:156.
[17]张志华,朱丽云.小方坯表面夹渣产生的原因与控制[J].连铸,2001,3:27.
[18]程鹏飞,唐海燕,吴光辉,等.方坯连铸结晶器内表面流速与卷渣行为模拟[J].连铸,2017,42(2):1.
[19]张俊粉,胡心光,康毅,等.82B钢连铸坯夹渣成因与控制[J].河北冶金,2014,224(10):49.
[20]齐新霞,岳峰.板坯结晶器钢液卷渣现象研究[J].河南冶金,2003,11(2):12.