Numerical simulation of flow phenomena and optimum operation of tundish

来源期刊：中南大学学报(英文版)2003年第2期

论文作者：时章明 鄂加强 刘春洋 梅炽 张全 周应其

文章页码：155 - 158

Key words：tundish; flow phenomena; numerical simulation; optimum

Abstract: To enhance the quality of grade 20 carbon-steel on the continuous casting production line, the mechanism of for min blowholes and non-metallic inclusions in billets and numericalsimulation of flow phenomena about liquid steel in tundish were studied. The results show that the configuration and operation of tundish play an important part in quality assurance of grade 20 carbon-steel products. By optimizing the configuration of the tundish, the depth of liquid bath in tundish is enhanced, the impact liquid steel is decreased, and the residence time of liquid steel is lengthened, which is useful for eliminating inclusions and blow holes and improving the service life of tundish. Improving the pouring and tapping operation of liquid steel can avoid the contact liquid steel with air, and decrease re-oxidation. Strict control of the superheat degree of casting liquid steel can decrease the no metallic inclusion content of the re-oxidation in billets and reduce the erosion of tundish. The inclusions and blowholes in the continuous casting grade 20 steel billets are reduced to a great extent and qualification rate is enhanced from 60% to 80%.