JP2010110762A - Hot-rolling line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot-rolling line on which new equipment such as an edge reduction press device, for example, can be installed without bringing about failure in operation and large plant and equipment investment by dissolving restriction of the distance between pieces of equipment in a hot-rolling line for manufacturing hot-rolled steel by hot-rolling a heated slab. <P>SOLUTION: A descaling device 13 is transferred on a conveying table 19 between No.1 heating furnace 11 and No.2 heating furnace 12 from an initial installation position (the downstream side of No.1 heating furnace 11) and the edge reduction press device 15 and the like are newly installed in the position where the descaling device 13 has been initially installed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hot rolling line for producing hot-rolled steel (hot-rolled steel strip, hot-rolled steel strip, hot-rolled shaped steel, etc.) by hot-rolling a heated steel slab (slab, bloom, etc.). .

  In a normal hot rolling line of, for example, a hot-rolled steel strip, equipment is arranged in the order of heating furnace, descaling device, roughing mill, finish rolling mill, runout table, and coiler from the upstream side to the downstream side. The slab extracted from the heating furnace is transported on the transport table downstream (see, for example, Patent Document 1).

FIG. 2 is a plan view showing the arrangement of equipment in the vicinity of the heating furnace, descaling device, and roughing mill for the normal hot rolling line as described above. In this hot rolling line, two heating furnaces (No. 1 heating furnace 11 and No. 2 heating furnace 12) are provided along a transfer table (transfer line) 19 and are removed on the downstream side. A scale device 13 and a roughing mill 14 are provided. And No. The slab extracted from one heating furnace 11 is transferred to the descaling device 13 via the slab transfer path A in FIG. 2, where the scale layer on the surface is removed, and then transferred to the roughing mill 14. Is done. No. 2 The slab extracted from the heating furnace 12 is transported to the descaling device 13 via the slab transport path B in FIG. 2, where the scale layer on the surface is removed, and then transported to the roughing mill 14. Is done.
JP-A-8-197130

  In the case of introducing a new facility (for example, a width reduction press device for reducing the width of a slab) between the heating furnaces 11 and 12 and the roughing mill 14 in the normal existing hot rolling line as described above. If a new device is arranged as it is between existing facilities (for example, if a width reduction press device is arranged as it is between the descaling device 13 and the roughing mill 14), the distance between the facilities will be shortened, resulting in operational problems. (For example, abnormal materials remain in the equipment when rolling is abnormal, and it takes a lot of time to process them. Also, if the distance between materials becomes too short, and tracking defects for materials occur, production will be greatly adversely affected. Etc.) may occur. Moreover, if it is going to secure the appropriate distance between facilities, many facilities will be rearranged and a large investment amount will be needed.

  This invention is made | formed in view of the above situations, and hot-rolled steel materials (a hot-rolled steel strip, a hot-rolled steel strip, a hot-rolled form) by hot-rolling a heated steel piece (slab, bloom, etc.). In existing hot rolling lines that manufacture steel, etc., new facilities such as a width reduction press device are installed without any restrictions on the distance between facilities and without incurring operational problems and large capital investment. An object of the present invention is to provide a hot rolling line that can be used.

  In order to solve the above problems, the present invention has the following features.

  [1] In a hot rolling line provided with a plurality of heating furnaces for heating steel slabs and equipped with a descaling device for removing scale on the surface of the steel slabs heated in the heating furnaces A hot rolling line characterized in that a descaling device is installed between any of the extraction positions of the steel slabs between the heating furnaces.

  In the hot rolling line according to the present invention, it is possible to install a new facility such as a width reduction press device without inconvenience in operation and a large amount of capital investment by eliminating the restriction on the distance between facilities. it can.

  An embodiment of the present invention will be described with reference to the drawings.

  In this embodiment, as shown in FIG. 2, along the transfer table (transfer line) 19, two heating furnaces (No. 1 heating furnace 11 and No. 2 heating furnace 12) are provided, On the downstream side, a normal existing hot rolling line having a descaling device 13 and a rough rolling mill 14 is assumed. In this existing hot rolling line, the descaling device 13 and the rough rolling mill are provided. 14 is intended to install a width reduction press device as a new equipment.

  Therefore, in this embodiment, as shown in a plan view in FIG. 1, the descaling device 13 is moved from the initial installation position (downstream of the No. 1 heating furnace 11) to No. 1. No. 1 steel slab extraction position on the transfer table 19 from the heating furnace 11 and No. 1 2 It is moved between the steel slab extraction position from the heating furnace 12 onto the transfer table 19. By the way, No. 1 heating furnace 11 and No. 1 The transfer table between the two heating furnaces 12 has been a marginal space so far.

  And as shown in FIG. 1, the width reduction press apparatus 15 is newly installed in the position where the descaling apparatus 13 was initially installed, for example.

  As a result, no. The slab extracted from one heating furnace 11 is once transported toward the descaling device 13 on the upstream side, as indicated by the slab transport path M in FIG. 1, and the scale layer on the surface is removed there. Later, it is conveyed toward the downstream width reduction press 15 and the roughing mill 14. No. After the slab extracted from the two heating furnaces 12 is conveyed toward the descaling device 13 on the downstream side as indicated by the slab conveyance path N in FIG. 1, the scale layer on the surface is removed there. Further, it is conveyed toward the downstream side width reduction press device 15 and the roughing mill 14.

  In the transport of these slabs, when extracting the slab from the heating furnace, the preceding slab extracted prior to the slab has already finished rough rolling and is going to finish rolling, or during finish rolling, Finish rolling has been completed, and slabs do not interfere with each other.

  In this way, in this embodiment, when newly installing the width reduction press device 15, the No. 1 heating furnace 11 and No. 1 Since the descaling device 13 is moved on the transfer table between the two heating furnaces 12, and the width reduction press device 1 is newly installed on the trace of the moved descaling device 13, the distance between each facility is shortened. There is not a malfunction in operation (for example, abnormal materials remain in the equipment at the time of rolling abnormality, the processing takes a lot of time, and the interval between materials becomes too short, and tracking failure for materials occurs. Such as having a significant adverse effect on production). Moreover, since an appropriate distance between facilities can be secured only by moving the descaling device 13, a large investment amount due to the rearrangement of many facilities is not necessary.

  In the above-described embodiment, it is a case where a width reduction press device is to be newly installed in an existing hot rolling line. However, in the case where an attempt is made to add a descaling device 13 in an existing hot rolling line. Can also be applied. That is, no. 1 heating furnace 11 and No. 1 It is only necessary to newly install a descaling device 13 to be added on the transfer table between the two heating furnaces 12, thereby enabling the descaling device 13 to be added without incurring operational troubles and large capital investment. Become.

  Moreover, in said embodiment, although the existing hot rolling line was premised, also in the case where a hot rolling line is newly established, based on said embodiment, it is No. 1 heating furnace 11 and No. 1 If the descaling device 13 is installed on the conveyance table between the two heating furnaces 12, the heating furnaces 11 and 12, the descaling device 13, and the roughing mill 14 are arranged in this order as in the prior art. Compared to the case, a compact line design is possible, and construction costs can be reduced.

  And in said hot rolling line, although there were two heating furnaces (No. 1 heating furnace, No. 2 heating furnace), three heating furnaces (No. 1 heating furnace 11, No. 2 heating) Furnace, No. 3 heating furnace) 1 heating furnace and No. 1 No. 2 on the transfer table between the heating furnaces. 2 heating furnace and No. 2 What is necessary is just to install the descaling apparatus 13 in any one on the conveyance table between 3 heating furnaces. If necessary, the descaling device 13 may be installed in both. The same applies when there are four or more heating furnaces.

  In the above description, the hot rolling line of the hot-rolled steel strip has been described as an example, but the present invention is not limited thereto, and the hot-rolling line and hot-rolled steel of a hot-rolled steel plate (thick steel plate). It can also be applied to a hot rolling line of (steel bar).

It is a top view which shows the hot rolling line in one Embodiment of this invention. It is a top view which shows a normal hot rolling line.

Explanation of symbols

11 No. 1 heating furnace 12 No. 1 2 Heating furnace 13 Descaling device 14 Rough rolling mill 15 Width reduction press device 19 Conveying table

Claims (1)

  Adjacent heating furnaces in a hot rolling line having a plurality of heating furnaces for heating billets and a descaling device for removing scale on the surface of the billets heated in the heating furnaces A hot rolling line, characterized in that a descaling device is installed between any of the extraction positions of the steel pieces.

Images