【摘 要】
：
The efficiency of the stationary lance for steelmaking desulphurization is concerned for its fixed injection point in the molten bath.The dynamic free lance,discovered accidentally in 2005,is a new ty
【机 构】
：
Fansmelt,Victoria 3146,Australia Iron & Steel R&D
论文部分内容阅读
The efficiency of the stationary lance for steelmaking desulphurization is concerned for its fixed injection point in the molten bath.The dynamic free lance,discovered accidentally in 2005,is a new type of injection lance with its top end connected with a flexible joint so that the lance tip could move during the injection.Without mechanical driving apparatus,the free lance is capable to inject the reagents into wider area of the bath,dispersion injection of the reagent may be expressed by C = B/S,where B is reagent injection rate,S is the injection area covered by the lance tip.The preliminary investigation of the free lance indicated that the lance movement caused forceful interaction of the injection gas with the liquid phase,and jet trajectory changed the route due to the drag force from the liquid phase.A refractory lance with length of 2 m has been converted into the free lance for further study,indicating that the heavy free lance used in the industry could achieve certain extent of movement for dispersion injection,and this prediction has been proved recently by industrial application of the 9 meters free lance used for the injection modification of the end-slag from steelmaking converter.
其他文献
Submerged Arc Furnace is used in reduction of nickel oxide mine.In this paper,a 3D finite element model was developed to analyze current density field and Joule heating field for electrodes,arc,burden
为了建立一个描述任意波形脉冲磁场下电磁力特性的通用数学模型,利用数学解析法推导建立任意波形周期脉冲电磁力的模型和理论解.利用此模型考察了三角脉冲磁场下电磁场和电磁力周期变化规律、脉冲频率和占空比对电磁力的影响.结果表明，任意波形周期脉冲磁场可通过时谐场叠加得到,各个时谐场的频率为基频的整数倍.三角脉冲电磁力方向呈现交替变化,并且其电磁压力绝对值大于电磁拉力.在脉冲磁场某时间段内，介质内部同时存在电
Transient molten steel flow in a slab continuous casting mold has been calculated using large eddy simulation,considering the heat transfer and solidification.The transport of bubbles in the liquid po
In present study,the complex heat transfers are systematically described,which happen in the ingot / slag skin/mold wall interface and the molten slag / slag skin/mold wall interface in the ESR proces
A large eddy simulation of unsteady argon/steel two phase flow in a continuous casting mold is presented.The Euler-Euler approach has been employed to describe the equations of motion of the two phase
One of the tundish major functions,is the reduction of impurities,i.e.non-metallic inclusions.Various arrangements,which promote floating of non-metallic inclusions into slag,are provided by continuou
Niobium,a traditional microalloying element for the production of HSLA steels,is usually added in amounts not more than 0.100-10 in the form of Standard Ferroniobium ( FeNb STD).Despite dissolving rea
钢中磷一般是有害元素,会显著降低钢材的低温冲击韧性.脱磷是炼钢过程的重要任务之一.转炉双联炼钢是生产高品质低磷钢的主要工艺,其中脱磷转炉是利用专用脱磷氧枪,可达到促进化渣效果,满足铁水预脱磷的目的.通过分析转炉炼钢脱磷过程的热力学和物料消耗,设计了马赫数为1.9、氧枪流量为14500 m3/h的四孔脱磷氧枪,利用Fluent软件模拟了脱磷氧枪的速度场、温度场和密度场等分布.模拟发现：四孔脱磷氧枪在
Slag coating on the lining surface exercised by means of nitrogen jets that splash specially treated slag with magnesium additives,has become an efficient technology to extend the lifetime of the conv
The induction heating is proposed to keep a constant casting temperature of the molten steel during the continuous casting process which is in favor of steel quality.A thermo-electromagneto-hydrodynam