Casting and continuous rolling method and plant to make long metal rolled products

Abstract

Method to make long rolled metal products, comprising the following steps: continuous casting, made by a continuous casting machine (11) to two casting lines (21a, 21b), each of the two casting lines (21 a, 21b) casting a product with a square, rectangular or equivalent section, with a ratio between the larger side and the shorter side of the section comprised between 1 and 4; shearing to size of the cast product by each casting line (21a, 21b) so as to define a segment comprised between 16 and 150 m in length and comprised between 10 and 100 tons in weight; direct introduction of each segment, having an average temperature of at least 1000 DEG C - 1150 DEG C, into a maintenance and / or possible heating furnace (14), comprising a first and a second movement section (20a, 20b) each disposed in axis respectively with one of the two casting lines (21a, 21b) in order to receive a respective segment; lateral transfer of each segment inside the furnace (14) in order to dispose it in a third movement section (24) disposed parallel and misaligned with respect to the first and the second movement section (20a, 20b) and aligned to a rolling axis of a rolling line (22) parallel and offset with respect to the two casting lines (21 a, 21 b); reduction of the section in a rolling mill (16) defining said rolling axis.

Description

technical field [0001] The present invention relates to casting and continuous rolling methods and equipment in semi-endless mode, generally used for the manufacture of elongated metal rolled products such as bars, wire rods, beams, rails or profiles. Background of the invention [0002] Known prior art continuous casting plants for the production of elongated rolled products have considerable limitations, as the production capacity of continuous casting plants usually does not exceed 25- 40 tons / hour. Therefore, in order to obtain higher production capacity, it is necessary to increase the number of casting lines connected to the same rolling line, which number can be as high as 8 lines or more. Among other things, this results in the need to translate billets or billets exiting the various casting lines at a single point of entry to the furnace, thus having temperature losses in transport. [0003] The result of this is the need to supply the furnace with a considerable ...

AI Technical Summary

Problems solved by technology

[0005] These process necessities and limitations are the main reasons for the increased energy required to heat the billet or billet and the deterioration of the overall capacity, both due to the large size of the tundish required for multiple casting lines and also due to the The huge number of billets or blanks to be processed at the same t / h quantity produced, and the resulting crops, the high number of heads entering the stand of the rolling mill at the entrance and having unsuitable The sub-length of the commercial size

Images