Rolling technology for large-scale and super-large steel in rough rolling zone

Abstract

The invention provides a rolling technology for large-scale and super-large steel in a rough rolling zone. The rolling technology comprises the following steps that after a steel billet is heated by aheating furnace, the steel billet is transported to a reversible edging mill for reversible rolling; then the rolled piece after vertical rolling is transported to a roughing mill for reversible rolling, rolling of a next rolled piece can be performed at the reversible edging mill immediately, when the steel billet is transported to the roughing mill, no turning is required, and the roughing milland the reversible edging mill simultaneously perform rolling; and then the steel billet is transported to a finish rolling zone for finish rolling. According to the rolling technology for the large-scale and super-large steel in the rough rolling zone, the time of adjusting a roll gap of the roughing mill and the rolling pass of the roughing mill are reduced by transferring a vertical rolling hole pattern of the billet to the rolling by the separate edging mill, the time of vertical rolling and turning of the steel by the roughing mill is completely eliminated, the production rhythm and efficiency are effectively improved, and the production line yield is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of H-shaped steel rolling, and in particular relates to a rolling process in a rough rolling area of ​​large and super large steel. Background technique [0002] In recent years, as the country's demand for H-beams continues to increase, the market added value of H-beams has increased. It prompts steel mills with steel production capacity to consider more new H-beam production lines when launching steel rolling projects. H-beam production lines can be roughly divided into large / super-large production lines, medium-sized production lines, and small-scale production lines. In China, there is only one roughing mill in the rough rolling area for large / ultra-large production lines for reversible rolling, and the specifications of large steel billets are relatively small, and some specifications require vertical rolling of the billets to shape the billets before rolling. For large-scale steel, the width of the b...

AI Technical Summary

Problems solved by technology

This leads to a large difference between the roll gap value of the rough rolling mill when vertical rolling and the subsequent pass rolling, and the transition from the vertical rolling hole to the second rolling pass requires a long time for the upper roll to be pressed down. , and after the rolling of the billet is completed, the roughing mill needs a long time to lift the upper roll and increase the roll gap to meet the roll gap setting of the vertical rolling hole of the next billet. The adjustment time is long and the production efficiency is low

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