9th ECCC European Continuous Casting Conference – ECCC 2017

To improve the productivity of continuous casting, the adoption of thin slab caster is being steadily increased. Due to high speed casting of thin slab caster, the optimized deign for SEN becomes precondition for stable operation in casting. Design technology for SEN has been improved through fluid flow analysis and thermal stress analysis by computer simulation and water model experiment. Depending on presence of EMBR(Electro Magnetic Brake Ruler), There are two different ways of SEN design concept. In this paper presents the simulation process for SEN design and application result at works for each case. In case with EMBR, we designed large SEN to be able to cast over 6ton/min. The bore area of SEN is designed sufficiently large to induce stable steel flow in the surface of mold in casting. By numerical experiment and water model experiment, stable flow is verified. Also, through FEM analysis, the thermal shock risk due to enlargement of SEN is minimized. In the real application, at 8m/min casting speed, the optimized SEN performed successfully showing stable surface flow in mold and after that there has been no trouble by thermal shock up to the present. And the case without EMBR, The steel stream inside of mold is decided by the design of SEN and it influence to slab quality directly. The dimension of discharge port and inner bridge is optimized by computer simulation to inclusions flotation and uniform temperature distribution in mold. And the computer simulation results are verified by water model experiment. And the SEN has good performance at works.