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Assessment of Slag Entrainment in a RH Degasser Through Physical Modelling Using Circulating Fluids of Different Densities/Oil Systems for Simulating Steel Melt/Slag

机译:使用物理密度的模拟通过不同密度/油系统的循环流体模拟RH脱气机中钢渣/夹渣的夹带渣

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In this work the circulation rates have been determined in a 1:7.5 scale physical model of RH reactor (Ruhrstal Heraeus) and using oil/water and oil/zinc chloride solution to simulate steel melt/slag in the prototype with the objective of evaluating the influence of density and viscosity on the entrainment of oil simulating slag. A technique based on strain gage bridge and particle image velocimetry was developed to assess the circulation rate, as the usual tracer method is not feasible due to the presence of chloride ions in ZnCl_2. The critical velocity and critical diameter of oil drops for slag (oil) entrainment in water/oil and ZnCl_2/oil systems were estimated using equations from the literature. Due to the difference in density, the ZnCVoil system, showed a critical velocity that is 28% higher than the silicone oil/water system while the maximum size of the entrained droplets was about 65% lower than that for water/oil system.
机译:在这项工作中,循环速率已在RH反应器(Ruhrstal Heraeus)的1:7.5比例物理模型中确定,并使用油/水和油/氯化锌溶液模拟了原型中的钢熔液/矿渣,目的是评估炉料的循环速度。密度和粘度对模拟油渣夹带的影响由于应变计桥和粒子图像测速技术的发展,开发了一种评估循环速率的技术,因为由于ZnCl_2中存在氯离子,所以通常的示踪法是不可行的。使用文献中的方程式估算了水/油和ZnCl_2 /油系统中夹带炉渣(油)的油滴的临界速度和临界直径。由于密度的差异,ZnCVoil系统的临界速度比硅油/水系统高28%,而夹带液滴的最大尺寸比水/油系统低约65%。

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