State Key Laboratory of Advanced Metallurgy;
University of Science and Technology Beijing;
Beijing 100083;
China;
Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting;
Beijing 100083;
China;
Fengbao Special Steel Co.;
Ltd.;
Linzhou 456552;
Henan;
China;
Six-strand tundish; Non-iso-velocity casting; Casting velocity ratio; Residence time distribution curve; Tracer concentration;