HOT-ROLLED STEEL STRIP PRODUCTION PROCESS AND PLANT WITH OPTIMISED POWER INPUT AND YIELD Russian patent published in 2016 - IPC B22D11/04 B21B1/46 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy and may be used for strip hot rolling at combination mill. Foundry unit crucible (2) is used to cast 105-130 mm deep slab to be squeezed to 85-120 mm depth in the guide (6). The length (L) of the thrust section measured between meniscus (13) in the crucible (2) and the guide (6) end (14) facing the roughing bloomer (4) equals or is larger than 18.5 m. casting rate v_c makes 3.8-7 m/min. Note here that at v_c = 3.8-5.0 m/min cast are 100-120 mm deep slabs while at v_c = 5.0-5.9 m/min produced are 85-110 mm deep slabs. At v_c larger than or equal to 5.9 m/min cast are 102 mm deep slabs. Slab (3) is rolled to intermediate strip (3') at the roughing bloomer (4) for no longer than 80 s in at least four rolling passes with the help of at least four roughing stands (4₁, 4₂, 4₃, 4₄).

EFFECT: high-quality strip, higher power efficiency and yield.

33 cl, 6 dwg, 3 tbl