Compact medium-width strip steel production process

Abstract

The invention relates to a compact method for producing middle-wide strip steel, which comprises: using melt iron to process pretreatment; smelting liquid steel; refining liquid steel; continuously casting the middle-thin plate blank; step beam heater heats uniformly; high-pressure water scale breaker breaks scale; one-frame four-roller reversible roughing mill mills; hot winding box winds; cutting the head and end of middle blank; the high-pressure water scale breaker breaks scale; the finishing roll machine continuously rolls; cooling the interlayer flow; the underground winder winds; and transporting steel coil. Wherein, all processes are inside one workshop or connected workshops. The invention can be used in middle steel factory with 1-2 million ton / year yields to match the metal flow, temperature flow and time flow effectively, to feed the high-temperature non-defect sheet blank at 920Deg. C into step beam heater, to save energy more than 60%, improve 1-2% of metal yield, reduce the producing cost and reduce the transport cost of middle process.

Description

technical field [0001] The invention relates to a method for producing strip steel by continuous casting and rolling, in particular to a method for producing medium wide steel strip with compact process arrangement, that is, a compact medium wide steel production process. Background technique [0002] At present, the domestic strip steel production situation is basically that the wide-band steel continuous rolling mill and the narrow-strip continuous rolling mill are in the majority, and the compact continuous casting and continuous rolling production line of the middle and partial wide-band steel is still blank. For strip steel with a width of 600-1300mm, the market demand is not small, but the existing narrow strip steel production line cannot produce it, and the wide strip steel production line is unwilling to produce it due to technical and economic reasons, and it is not suitable for production. [0003] The technology of conventional slab continuous casting machine wit...

AI Technical Summary

Problems solved by technology

However, due to the high casting speed of 50-70mm billet (4-6m / min), the performance requirements for mold flux are very strict, and the stability of the process is also very strong. The funnel-shaped mold is sensitive to the production of peritectic steel and cracks. Restricted steel grades

[0005] The Chinese invention patent application "Production method of medium and thin slab continuous casting and rolling coil" (publication number CN1483521) published on March 24, 2004, the disclosed technology is suitable for producing wide strip steel, but there is a long production process , not very compact, the distance between the converter steelmaking and the continuous casting machine is more than 1400m, and the continuous casting slab cannot be directly heated into the heating furnace. This method is not completely suitable for the production of compact medium and wide strip steel. Need for improvement

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