合金在LF钢包精炼过程中的变化研究

在模拟研究底吹Ar搅拌下钢包精炼过程钢液循环湍流流动基础上,模拟研究了宝钢300t LF钢包精炼炉中合金熔化、熔融等变化过程.     

LF钢包精炼过程钢液流动场模拟研究

在湍流流动模型基础上，建立了底吹Ar搅拌下LF钢包精炼过程钢液循环流动模型．应用该模型对不同吹气量下钢液流动进行了模拟研究．在宝钢300tLF钢包精炼炉条件下。得到了有效吹气量范围．     

重特LF-20型单支臂钢包精炼炉的结构、功能和特征

介绍新型三相单支臂LP炉钢包精炼炉的设备特点及其优越性     

ACLF炉称量钢包车设计

对ＡＣ／ＬＦ精炼炉称量钢包车的缓冲装置、称量装置等受纵向横向冲击时的强度、刚度进行分析 设计，定位装置设计     

重特LF—20型单支臂钢包精炼炉的结构,功能和特征

介绍新型三相单支臂ＬＦ炉钢包精炼炉的设备特点及其优越性。     

LFV型钢包精炼炉的冶金特性

本文简要介绍和探讨了LFV型钢包精炼炉在脱气、脱硫、脱磷、脱碳、去除夹杂物、吹氩搅拌和温度补偿诸方面的冶金特性,可以作为冶金工作者在炉外精炼选型时参考。     

长钢四厂炼钢分厂2#LF炉钢包车设计

对ＡＣ／ＬＦ精炼炉钢包车结构受静载荷和冲击负荷时强度和刚度进行设计计算，对传动机构选型及定位装置等进行设计分析。     

液压柱塞泵失效机理研究

通过对炼钢厂SKF钢包精炼炉液压系统恒压变量柱塞泵失效形式分析,找出柱塞泵失效原因,并提出相应的改进措施。     

长钢四厂炼钢分厂2~#LF炉钢包车设计

对AC/LF精炼炉钢包车结构受静载荷和冲击负荷时强度和刚度进行设计计算,对传动机构选型及定位装置等进行设计分析。     

马钢三钢轧LF-70t钢包精炼炉迁移改造实践

简单介绍了LF-70t钢包精炼炉迁移改造,进行了技术改造,实现技术进步和生产顺行,达到增加产能与开发生产高附加值产品目的,及其设备以实现正确操作和提高工艺性能为目标,取得了实用效果,实现了冷墩钢高附加值产品的开发,具有较强的实用性和推广性。     

钢包底吹多相流运动参数的理论研究

根据全浮力物理模型，应用动量定理建立钢包庇吹中粉气液三相区中平均速度和液体平均体积浓度的全浮力数学模型．计算结果表明：三相区中平均速度随高度的增加而减少，液体平均体积浓度随高度的增加而增大；粉气液三相区锥角和液体密度随着高度的增加对平均速度和液体平均体积浓度的影响逐渐减小．     

300t精炼钢包透气砖应用的数学物理模拟

针对300t精炼钢包,在LF设备电极位置与钢包透气砖所在位置的对应关系确定的基础上,通过水模、数模分别采用单吹、复吹时钢包内钢水流动特性和夹杂物去除的对比研究,探讨了透气砖结构性能的影响作用。结果表明,单吹时应使用抗渗透较好且能形成有利于夹杂物去除的气泡形态狭缝式透气砖（PBI）,吹气卷渣临界气量为1．45m^3／h,气量需稳定,混匀时间为82．44s,钢液渗透小,夹杂物去除率为62．86％,能够满足搅拌钢液起到成分和温度的快速均匀以及净化钢液的作用。     

注入钢液温度降低时中间包非稳态过程数值模拟

利用所建立的中间包非稳态传输过程数学模型对包浇注一个包次周期中中间包工作过程进行了数值模拟.在中间包非稳态过程模拟中首先采用稳态速度场和温度场作为计算的起始速度场和湿度场,以此为基础,完成一个包次浇注过程的计算后,用其所得物理场作为初始速度场和湿度场,进行中间包注入钢液温度降低所产生的非稳态过程模拟计算.模拟结果表明,这样处理更加逼近中间包的真实状态.通过对数值模拟结果的分析,发现在钢包一个包次浇注过程中,中间包中出现两次"流动逆转"和"温度逆转",且第一次逆转有利于中间包冶金功能的发挥,第二次逆转的作用相反,应设法避免和推迟中间包内第二次逆转现象的出现.     

Direct Current Electric Arc-Electroslag Ladle Furnace

In order to solve the high consumption problem of small capacity ladle furnace (LF), the operation principle and control method of the DC arc and electroslag heating ladle furnace are introduced. With only one arcing electrode, the distance between the arc and the wall of ladle is enlarged, and consequently the consumption of the ladle refractory is decreased. In the invention, a signal electrode is embedded in the refractory lining of the ladle, which contacts directly with the liquid steel and the ladle shell. TWo graphite anode ends are submerged in the slag layer. The signal electrode is used as voltage reference during refining process. The electroslag voltage between anode end and liquid steel is applied to control the depth of anode end in the slag layer during the refining process with this ladle furnace.     

炉外精炼中钢包底吹氩流场的数学模拟

主要用数学模型模拟研究了CAS－OB和常规底吹氩在不同底吹位置时的流场，并详细分析情况下的流场特点，旨在得到一个较好的流场，能更好地提高发热剂的发热效率，增加提温速度，减少浸渍罩耐材的剥落，模拟结果表明，CAS－OB和常规底吹氩流场有较大的不同，在流速的一定的情况下，流场与浸渍罩浓度，底吹位置有较大关系，CAS－OB钢包中底吹位置在偏心0．45r处，所得流场比较有利于改善钢液质量。     

空/煤气入口布置对顶燃式热风炉内温度场和速度场影响的数值模拟

建立顶燃式热风炉内的三维、稳态传热和流动数学模型,求得了炉内温度场和速度场;在此基础上,探讨了不同空/煤气入口布置对炉内温度场和速度场的影响.研究结果表明:煤气入口单一布置时,炉内流体的温度场及速度场的分布均极不均匀,且偏向煤气入口侧炉壁;空/煤气入口间隔布置时,炉内流体的温度场及速度场分布均较为均匀,这种布置方式有利...     

连续式钢管热处理炉热工过程数值模拟

利用钢管在炉膛内的加热历史(或移动过程)与其自身非稳态导热过程相一致的特点,建立了钢管淬火炉内的传热数学模型,并利用CFD计算软件STAR-CD求解了整个炉膛传热数学模型.     

Fluid mechanics of ventilation system generated by buoyancy and momentum sources and experiments research

This paper presents fluid mechanics of ventilation system formed by the momentum source and the buoyancy source,which investigates inter-action between the plume and the non-isothermal air jet since buoyancy source is produced by the plume and momentum source is generated by the air jet,respectively. The interaction is discussed by a mathematical model,an idealized situation of the plume rising from a point heat source of buoyancy alone-in particular the initial momentum flux at the source is zero. Furthermore,the paper discusses the effects of the parameters such as strength of source,air-flow volume and air-flow velocity used in the mathematical-physical model. Considering the effect of the plume generated by the indoor heat source,one expression of trajectory of the non-isothermal air jet produced by jet diffuser is deduced. And field-experiment has also been carried out to illustrate the effect on flowing-action of the air jet and validate the theoretical work. It can be concluded that the heat sources do have effect on the flowing-action of the air jet,and the effect mainly depends on the interaction produced by the plume and the air jet. The results show that the thermal buoyant effect of plumes on the air jet should be taken into account if the indoor heat sources are large enough. Numerical simulation is conducted and coincides with the experimental results as well.     

长一维直通式辊底加热炉内传热数学模型研究

通过分析ＣＳＰ工艺中直通式辊底加热炉的热工及结构特性,采用地建立炉内辐射换热数学模型,与加热炉内连铸坯及炉衬的一维导热方程相耦合,建立长一维直通式辊底加热炉炉内传数学模型,通过对数注解,研究分析了不同的薄板坯移动速度及 种对加热炉炉内温度分布的影响。     

Optimization of mixing time in a ladle with dual plugs

Based on the two-phase fluid (Eulerian-Eulerian) model, a mathematical model about the gas-liquid flow and mixing behavior was developed to investigate the effect of the offset of dual plugs, the included angle of dual plugs with a center point, and gas flow rate on the mixing time in a ladle with dual plugs. Numerical results indicate that two types of recirculation zones exist in the ladle. One is the middle recirculation between gas and liquid plumes, and the other is the sidewall recirculation between plumes and the ladle sidewall. The correction shows that the mixing time is in proportion to -0.2676 power of gas flow rate. There is a unique optimum offset of dual plugs with a particular included angle, in turn, a unique optimum included angle of dual plugs exits with a particular offset.