Brief introduction of horizontal continuous casting technology

Because the horizontal continuous casting crystallizer is horizontally arranged, the static pressure of molten steel in the crystallizer is low, which avoids the bulge of casting blank, and the horizontal continuous casting tundish is hermetically connected with the crystallizer, which effectively prevents the secondary oxidation of steel flow; The cleanliness of billet is high, and the inclusion content is generally only1/8 ~116 of arc billet, so the quality of billet is good, which is beneficial to pouring steel grades such as alloy steel containing oxidizable elements and small-section high-quality billet; Horizontal continuous casting does not need straightening, and can be used to cast special steel with crack sensitivity that arc continuous casting machine can not.

Almost all special steels, high alloy steels and non-iron-based alloys can be continuously cast by horizontal continuous casting machine. At present, the three key technologies of developing horizontal continuous casting machine, namely separation ring, crystallizer and billet drawing mechanism, have been solved, and the defects that affect the quality of horizontal continuous casting billet, such as central porosity and central segregation, are not serious compared with vertical and arc continuous casting machines. Existing technical measures (control of molten steel temperature by tundish heating, electromagnetic stirring of crystallizer and secondary cooling section, controlled cooling technology of crystallizer and secondary cooling section, etc.). ) has been able to reduce the harm of these defects to horizontal slab. For this reason, horizontal continuous casting machine has been paid attention to by domestic parties for a long time. Many domestic steel mills have used horizontal continuous casting machines to produce round tube billets, square billets and rectangular billets. Horizontal continuous caster will soon become the fourth generation continuous caster after vertical bending continuous caster and arc continuous caster, so it is the future of continuous caster.