不同强磁场条件对渣金界面反应速率的影响

Influence of High-Intensity Magnetic Field on Substitution Reaction Rate on Slag-Metal Interface

为了考察强磁场对渣金界面反应各步骤及总体反应速率的影响,研究了Al-Cu合金与质量配比为w(MgF2):w(CaF2):w(LiF):w(ZrF4)=1.7:1:1.5:9.3的四元熔渣发生的置换反应在不同强磁场条件下的反应速率.研究发现施加无梯度强磁场时,渣金界面反应速率在micro-MHD效应影响下加快;在梯度磁场下,反应界面受到梯度强磁场引发的磁化力以及micro-MHD效应的影响,从而导致化学反应速率发生变化.研究表明通过强磁场可以对渣金界面反应速率进行有效控制.

The rate of substitution reaction between the Al-Cu alloy and quaternary slag of which the mixture ratio in mass fraction is w （MgF2） ： w（CaF2） ： w（LiF） ： w（ZrF4） = 1.7：1：1.5：9.3 in the high-intensity magnetic fields under different conditions was investigated to make sure of how the high-intensity magnetic fields affect every and each step in the reaction process on slag- metal interface and the global reaction rate. The results revealed that the reaction rate is quickened owing to the micro-MHD effect if the high-intensity magnetic field applied to the reaction interface is of zero gradient, while the reaction rate changes in the high-intensity gradient magnetic field because the reaction interface is under the action of both the magnetizing force evoked by the magnetic field and micro-MHD effect. A conclusion is thus drawn that the reaction rate on slag-metal interface can be controlled efficiently via a high-intensity magnetic field.