镁蒸气铁水脱硫气液反应过程水模型研究

Water Model Study on Gas-Liquid Reaction Process of Desulfurization of Molten Iron with Magnesium Vapor

针对镁蒸气铁水脱硫的气液反应过程,利用物理模拟的方法,通过水模型实验对铁水脱硫气液反应过程进行实验研究.采用高速照相机来获取不同通气模式、通气流量和搅拌桨浸入深度下气泡的分布状态.用NaOH与CO_2的一级反应来模拟镁蒸气脱硫过程中的吸收速率和利用率.结果表明:使用中心底吹模式,通气流量为2. 0 m^3/h,搅拌桨浸入深度为250 mm的条件时,熔池内的气泡细化分散效果很好.气液传质速率和CO_2气泡利用率均有明显提高.

For the gas-liquid reaction process of desulfurization of molten iron with magnesium vapor,the physical simulation method was used to study on the reaction process of desulfurization of molten iron.The high speed camera was used to obtain bubble dispersion phenomena under the conditions of different injection modes,gas flow rates and impeller immersion depth.The first order reaction of NaOH with CO2 was used to simulate the absorption rate and utilization rate of magnesium vapor in the process of desulfurization.Results show that:under the conditions of centric bottom blowing injection mode,the gas flow rate 2.0 m^3/h,impeller immersion depth 250 mm,the bubble refinement and dispersion in the bath was good.The gas-liquid mass transfer rate and utilization rate of CO2 bubbles were observably improved.