Installation for producing a hot-rolled strip

Abstract

The invention relates to a plant for producing a hot strip from a metal melt in accordance with the twin-roll casting process. To increase the melt throughput in the tundish to above the capacity limit of a one-stranded casting plant operating according to the twin-roll casting process and at the same time to reduce the batch casting times significantly with minimal investment and operating costs, the invention proposes a plant configuration in which a casting ladle (1) with a melt outlet (5) is assigned a tundish (6) for receiving the metal melt from the casting ladle (1), in that this single tundish (6) is equipped with at least two bottom outlets (8a, 8b) for transferring the metal melt to two twin-roll casting devices (10a, 10b), in that each casting nip (13a, 13b) is assigned at least one of the bottom outlets (8a, 8b) of the tundish (6), and the two casting nips (13a, 13b) are arranged at an angle of 15 DEG to 180 DEG , or parallel and offset with respect to one another in terms of their longitudinal extents.

Description

technical field [0001] The invention relates to a plant for producing hot-rolled strip from molten metal according to the twin-roll casting method and using two twin-roll continuous casting installations. Background technique [0002] This plant for the production of hot-rolled thin strip, preferably steel strip, close to the final dimension according to the twin-roll casting method basically consists of two driven casting rolls arranged at a distance from each other and counter-rotating. The axis of rotation lies in a horizontal plane. The casting rolls form a casting roll gap, the lateral boundaries of which are formed by side plates pressed against the ends of the casting rolls. For this purpose, side plates are also known which can be pressed vertically on the ends of the casting rolls. The two casting rollers and the side plates form a melt chamber into which molten metal is fed through a submerged sprue. On the two circumferential surfaces of the cooled casting roll...

AI Technical Summary

Problems solved by technology

There are restrictions on the size of the tundish due to the need for uniform heating at the start of the tundish operation and the required melt diversion and handling within the tundish

A tundish with a longitudinal extension of more than 10 m is hardly technically feasible in relation to the total throughput of the two twin-roll casters, which would result in very high metal volumes and very large wet refractory linings, and thus Lead to increased consumption of refractory materials and reduced yield

Images