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对钢包喷粉冶金过程中的一些速率现象,如搅拌强度、即熔池混合行为,以及钢液的脱硫速度等,进行了研究。在这一研究工作中,使用了不同尺寸的水模型、30～100公斤实验用炉、6 t和60t实际钢包。为测量流体流动速度和气体流出及气泡行为,设计制作了一种测速形阻件和电导探头,这些仪表可用于水和液体金属中。一种金浮力模型被推荐于描述包内喷入气体和熔池间的能量转换关系。已经发现,气泡泵起作用对液体金属有强大的驱动效率,衡量这种作用的参数(抽引比)可达50～200。在这种条件下,加入物的混匀时间只有1～2分钟。在一个喷粉处理的钢包内,达到90%脱硫率所需的时间只有几分钟。本文叙述的实验工作是先后在瑞典冶金研究所、瑞典皇家工学院冶金系和中国东北工学院实验室内进行的。
Some rate phenomena in ladle metallurgy, such as the agitation intensity, that is, the mixing behavior of molten pool, and the desulphurization rate of molten steel, were studied. In this research work, different size water models, 30-100 kg experimental furnaces, 6 t and 60 t actual ladle were used. In order to measure fluid flow rate and gas outflow and bubble behavior, a tachometer-type resistive and conductivity probe was designed and fabricated for use in water and liquid metal. A gold buoyancy model is recommended to describe the energy conversion between injected gas and molten pool. It has been found that bubble pump actuation has a strong driving efficiency for liquid metals and that the parameter (pumping ratio) to measure this effect can reach 50-200. Under these conditions, the mixing time of the addition is only 1 to 2 minutes. Within a dusting ladle, the time required to reach 90% desulfurization is only a few minutes. The experimental work described in this article was carried out successively in the Swedish Institute of Metallurgy, the Swedish Royal Institute of Technology Department of Metallurgy and the Northeast China Institute of Technology laboratory.