论文部分内容阅读
为了优化连铸过程中结晶器内的钢液流态,世界各地的钢厂在改进浸入式水口吐出孔设计方面取得了一定的进展。该技术对于连铸工序实现高效生产高品质钢显得更为重要。一般说来,要实现连铸机高效生产,必须增大浸入式水口的内径和吐出孔尺寸,以增加通钢量,从而提高生产效率。但是,浸入式水口吐出孔尺寸增大后,钢液出口形成的非均匀流导致结晶器内钢水波动及保护渣卷渣夹杂,使钢质降低,且可能导致漏钢。叙述了塔塔钢铁英国公司带钢生产部门的塔尔博特港厂3号连铸机水口设计的技术进步。通过改进水口吐出孔设计,优化浸入式水口吐出孔钢液流态,进而降低结晶器内的钢液波动,减少卷渣夹杂。此外,还对塔尔博特港厂采用改进式水口后的结晶器内钢液流态和钢质进行了调查和评估。叙述了该厂3号铸机改善结晶器钢液流态所做的工作。
In order to optimize the fluid flow in the mold during the continuous casting process, mills around the world have made some progress in improving the design of submerged entry nozzle discharge holes. This technique is even more important for efficient production of high-quality steel in the continuous casting process. Generally speaking, in order to realize efficient production of continuous caster, it is necessary to increase the inner diameter of the submerged entry nozzle and the size of the discharge hole to increase the throughput of the continuous casting machine so as to improve the production efficiency. However, as the size of the outlet hole of the immersion nozzle increases, the non-uniform flow formed at the outlet of the molten steel causes the fluctuation of the molten steel in the mold and entrainment of the slag entrained slag, which reduces the quality of the steel and may lead to the steel breakout. Described the technical progress of the nozzle design for the continuous casting machine No.3 at Talbot Port in the strip steel production sector of Tata Steel UK. By improving the design of nozzle discharge hole, the flow pattern of molten steel in the submerged nozzle is optimized to reduce the fluctuation of molten steel in the mold and reduce entrainment of entrapped slag. In addition, the steel flow and steel in the mold after the improved nozzle was used in Talbot Port were investigated and evaluated. Described the plant on the 3rd casting machine to improve the flow of liquid steel mold done.