Refractory Erosion Study And Structure Optimization Of Six Flow Tundish

Tundish metallurgy technology is the main link in the process of continuous casting, its main roleis to reach the purpose of uniform speed and temperature in tundish by installing different curtains ondevice, adjusting the flow of the molten steel. At the same time, it can improve the removal rate ofinclusions and reduce the strength of lining erosion in tundish. The paper uses40T type tundish sixflow in a domestic iron and steel company as the research object, by adopting the combination ofnumerical simulation and physical simulation method, this paper analyses different curtains on deviceon the influence of the temperature field, flow field in tundish, and studying the influence of theinclusions and liquid steel on the strength of lining erosion.In the process of numerical simulation and in view of the long narrow features of six flow tundish,circular retaining walls are installed in tundish. It makes the9kinds of optimization scheme from thefour aspects of opening position, hole diameter, hole angle and the size of the retaining wall. UsingFLUENT commercial software for tundish with no curtains of the device, installing V type retainingwall in the middle of the pack and turbulences controller and circular retaining wall combination oftundish is for numerical calculation. In the process of physical simulation, the continuous castingtundish is established on the basis of1:3.5similar proportion, using the combination of methods of theexperiment of "stimulus-response" technology, video and photo, to determine the average residencetime distribution curve, the tracer experiment and tundish lining erosion experiment.The results show that the flow of molten steel in tundish without curtains on device is slow, themaximum temperature of all exports is10K, up to77.5%of the dead zone in tundish and the tundishlining erosion occurs mainly at the bottom of flow injection area, injection flow region and1/3location of the bottom of the wall and at the bottom of the wall to the corner, the intensity of erosionto the bottom of the wall reaches0.02kg/m2. The installation with v-shaped retaining wall in thetundish can effectively improve the flow within the molten steel, extend the residence time of theliquid steel in tundish and the proportion of dead zones inside the tundish fall to62%. After installingthe turbulence controller and circular retaining wall, the flow of molten steel in tundish is moreuniform, the temperature of liquid steel in each export is consistent, The pouring zone in tundishforms multiple circulation area, which is beneficial to extend time of the liquid steel staying in tundishand wipe out the inclusions, the dead zone ratio fall to35.9%in the same period. The damage oftundish lining erosion occurs mainly at the bottom of the flow area and the lateral wall of injectionflow area, and the intensity of erosion to the bottom of the wall reaches0.02kg/m2, prolonging theservice life of the tundish effectively...