Rod and wire rod continuous casting and direct rolling process without heating furnace

Abstract

The invention discloses a rod and wire rod continuous casting and direct rolling process without a heating furnace, and belongs to the technical field of rod and wire rod production processes. According to the rod and wire rod continuous casting and direct rolling process without the heating furnace, heating-free direct rolling without the heating furnace is adopted, so that fuel is saved and energy consumption is reduced; secondary heating of a steel billet is avoided by adopting the direct rolling, and oxidation burning loss is reduced by 0.6% or more; a hydraulic shear is adopted in the process of continuous casting blank cutting, the shearing time is short, the temperature loss of a casting blank is reduced, the gas consumption is reduced, and the cost is saved; a heat preservation roller table is adopted, so that the temperature loss is reduced, the surface temperature of the continuous casting blank before entering a continuous casting cooling bed is guaranteed to be 1,000 DEG Cor above so as to facilitate the direct rolling process; and by adopting the design without the heating furnace, the influence on steel rolling production when the heating furnace is stopped for maintenance is reduced.

Description

technical field [0001] The invention belongs to the technical field of bar and wire rod production technology, and in particular relates to a continuous casting and direct rolling process for rod and wire rod without heating furnace. Background technique [0002] The traditional continuous casting and rolling steel production process is: continuous casting machine→flame cutting→roller table transportation→cooling bed collection→workshop crane lifting→hot delivery roller table→steel loading platform→steel separator→into furnace roller table→heating furnace→ Tapping device→rolling mill. In the current situation of high environmental protection requirements, excess steel production capacity and fierce competition, many domestic steel mills are actively exploring direct rolling of continuous casting slabs from continuous casting to rolling mills in order to save energy, reduce emissions, and reduce production costs. The production process has been realized by some iron and steel...

AI Technical Summary

Problems solved by technology

The difficulties in realizing continuous casting and direct rolling of long continuous casting slabs include the following points: the temperature after cutting the slab cannot be guaranteed, which is not conducive to the heating-free direct rolling process; When the cutting point reaches the fixed-length position, the temperature drops during the slab conveying process, resulting in temperature instability and affecting the direct rolling process

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