Method for improving yield of qualified sized casting blanks at casting stop stage of continuous casting machine

Abstract

The invention discloses a method for improving the yield of qualified sized casting blanks at a casting stop stage of a continuous casting machine, belongs to the technical field of continuous casting control methods, and adapts to improve the yield of the qualified sized casting blanks at the casting stop stage of a square blank continuous casting machine. On the premise of fully considering the influence of tundish molten steel temperature and tundish residual molten steel quantity at the casting stop stage on casting blank production and casting blank quality, the restrictive relation between tundish molten steel weight and casting weight of each flow of the continuous casting is formulated, and the effective casting time for each flow of the continuous casting machine at the casting stop stage is calculated; steel casting is performed in sequence according to a prior distribution right order of the molten steel at a nozzle of each flow; in the case of meeting the restrictive condition, the length of each casting blank cut by a flame cutting machine corresponding to the casting machine of the flow can meet the requirement of sizing after the nozzle of each flow is closed certainly by controlling the operation of a stopper of each flow, so that the yield of the qualified sized casting blanks is improved, the utilization rate of molten steel in the tundish is improved, the improvement of the product quality and the yield is promoted, and the economic benefit of enterprises is improved.

Description

Technical field [0001] The invention relates to a method for reducing the output of unqualified cast slabs with fixed length during the pouring stop stage of a square billet continuous caster, and improving the output of qualified fixed-length cast slabs, belonging to the technical field of continuous casting control methods. Background technique [0002] In the continuous casting production, the cast billet drawn from the continuous casting machine will be cut into the specified length by the flame cutting machine, which is called "fixed-length production". The fixed length is the specific length of the billet specified according to the user's requirements for the steel product standard. The fixed length is an extremely important indicator in the subsequent rolling process. Generally, billets produced in accordance with the fixed-length requirements can be rolled to meet the customer's requirements. However, the length of the billet does not meet the fixed-length requirements, e...

AI Technical Summary

Problems solved by technology

[0007] To sum up, in the continuous casting production process, the problem that the length of the last slab does not meet the requirements of fixed length has not been effectively solved, and it has become a difficult problem in continuous casting production, which directly affects the qualified production of slab to length. The rate also affects the product quality and the economic benefits of the enterprise, which needs to be solved urgently.

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