Technique method for improving product rate of reversible cold-rolled steel strip

Abstract

The invention provides a technological method for improving the rolling yield of reversible cold rolled steel strips, applicable for the production field of preliminary treatment acid washing and annealing acid washing of the cold rolled steel strip production. The technological method is characterized in that a guiding tape, the length of which is required by tape tail welding of the coil of strip, is added at the uncoiling point in front of the preliminary treatment acid washing and annealing acid washing machine group in the technological procedure of the reversible cold rolling. The technological method has the advantages that the technological method does not consume the production time of the machine group and at the same time solves the problems of low rolling yield of the reversible cold rolled steel strips in subsequent process steps; thus, the technological method improves the rolling yield of the strip material and saves production cost.

Description

technical field [0001] The invention belongs to the field of cold-rolled pickling production, in particular to the production field of reversible cold-rolled strip steel production pre-treatment pickling and annealing pickling. Background technique [0002] At present, in the process layout of the original cold-rolling workshop in China, most of the reversible cold-rolled strip steel production adopts unwelded leader belts. There is a certain distance between the left and right coilers and the rolling mill. In order to establish the tension required for reversible rolling and a stable reversible process, one or two laps of strip steel should be reserved on the reels of the left and right coilers. And the head and tail of this distance length steel strip can not be rolled by rolling mill, so the thickness of the head and tail of this length cannot reach the thickness required by the finished product, so the yield of the strip is reduced, and the raw material cannot be fully u...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of low production efficiency, low production capacity and large waste of plates in the original domestic reversible cold rolling unit, the present invention adopts pickling and annealing pickling before and after production in the reversible cold rolled strip production. The lead strip is welded with the tail, at this time, the steel strip does not occupy the production time of the unit, does not affect the production capacity and production efficiency of the pickling and annealing pickling unit, and does not affect the production of the reversible rolling unit, thereby improving production efficiency and unit capacity

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