A heating-free direct rolling system and method for continuous casting slabs of wire and rod

Abstract

The invention provides a wire rod continuous casting billet heating-free direct rolling system and method. The wire rod continuous casting billet heating-free direct rolling system comprises a continuous casting machine, a rapid hydraulic shear, a cut roller bed, a casting billet stream gathering roller bed, a transportation hot delivery roller bed and a wire rod rolling mill which are closely arranged in sequence. The casting billet stream gathering roller bed gathers casting billets on each stream onto the transportation hot delivery roller bed. A gate mechanism used for blocking the casting billets from entering and releasing the casting billets is arranged between the cut roller bed and the casting billet stream gathering roller bed. According to the wire rod continuous casting billet heating-free direct rolling system and method, efficient continuous casting of the continuous casting machine is conducted, and the casting billets are high in pull-out temperature, regular in shape, low in temperature loss, rapid in shearing and high in initial temperature; by means of the gate mechanism, the sheared casting billets sequentially enter the high-speed casting billet stream gathering roller bed in order, operation is easy and convenient, and production is easy to organize; and when the casting billets reach an inlet of the rolling mill, the temperature of the casting billets is high, and the casting billets can be directly rolled in a heating-free mode, so that the damage to the rolling mill is small.

Description

technical field [0001] The invention belongs to the technical field of metal continuous casting and rolling, and in particular relates to a heating-free direct rolling system and method for continuous casting billets of wire and rod. Background technique [0002] At present, the production process of wire and bar is mostly: the molten steel is cooled and solidified by the continuous casting crystallizer and the secondary cooling section, and then straightened by the drawing and leveling machine to pull out the cast slab, and the cast slab is cut to length by flame and then conveyed by the cutting roller table and The roller table is sent to the blanking area. The casting slabs that need to be hot-sent are sent to the hot-sending roller table through the steel turning machine, steel transfer machine, and steel separator, and are directly sent to the rolling steel into the heating furnace; Send it to the steel turning cooling bed for cooling, and then the slab collection plat...

AI Technical Summary

Problems solved by technology

The defect of this production process is that: the high-temperature casting slab is cooled due to the long follow-up process, and reheating causes a lot of energy consumption. Even if it is hot charging and hot delivery, it still needs to be heated, which also consumes a lot of energy; the construction of the steel rolling heating furnace Investment, daily maintenance, material consumption, etc. will also consume huge economic input and production costs, and increase carbon emissions

Although this patent adopts a stepwise billet discharge method, cancels the traditional heating furnace, and adopts a multi-flow and single-flow connecting roller table and adopts heat preservation measures, it does not affect the casting speed and secondary cooling of the continuous casting machine itself. The control is improved, and there is no requirement for the cutting of the slab or the shearing time, because the place where the slab is cut is the starting temperature of the slab for direct rolling without heating. If the starting temperature of the slab is not high, then the No heat-free direct rolling (the surface temperature of the slab after rolling is >850°C)

In addition, the premise of the stepwise billet discharge method is that the continuous casting must be stable and forward, and the casting billets can only be sent out sequentially by controlling the casting speed in the middle. This kind of operation is very difficult and not easy for on-site production

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