CN214391645U - Device for slowing down temperature drop and oxidation of steel billet - Google Patents

Abstract

The utility model relates to a rolling auxiliary device of ferrous metallurgy industry, especially a device that slows down steel billet temperature drop and oxidation, include: the method comprises the following steps: the device comprises a bin body, an inert gas inlet pipe and a conveying roller way; the bin body is a structure enclosed by a bottom plate, side walls and a top plate, a heat insulation layer is arranged on the inner wall of the bin body, a feeding hole and a discharging hole are respectively formed in two sides of the bin body, and a guide hole is formed in the bin body; one end of the inert gas inlet pipe extends into the bin body through the guide hole, and the other end of the inert gas inlet pipe is connected with an inert gas source; the rollgang is arranged in the bin body and is positioned at the lower part of the bin body. The utility model has the advantages that: the utility model reduces the heat dissipation rate of the steel billet through the arrangement of the bin body; in addition, the arrangement of the inert gas inlet pipe on the bin body reduces the oxidation speed of the steel billet and avoids the formation of thicker iron oxide on the surface of the steel billet; meanwhile, a conveying roller way is arranged in the bin body, so that the moving and conveying of the steel billets can be facilitated.

Description

Device for slowing down temperature drop and oxidation of steel billet

Technical Field

The utility model relates to a rolling auxiliary device of ferrous metallurgy industry, especially a device that slows down steel billet temperature drop and oxidation.

Background

At present, steel is widely applied as a structural material in various military and civil fields, and the manufacturing and transportation of steel billets cannot be separated in the production and manufacturing process. Due to the requirement of process production design, the steel billet is exposed on a naked roller way for a long time in the transportation and retention processes after leaving the heating furnace, and iron elements on the surface of the steel billet can generate chemical reaction with oxidizing gas in the environment at the moment, so that iron oxide is formed. The phenomenon that a thicker scale shell is rapidly generated on the contact surface of the billet and air is caused.

Patent publication No.: CN1911547A discloses a heat preservation device for roller way billet in steel rolling mill, which can effectively slow down the heat dissipation speed, but has a complicated mechanical structure, and the protection cover is integrally fixed on the roller way.

Patent publication No.: CN107135563A discloses a spontaneous heating heat preservation device that can resume fast, the device contains: a self-heating heat preservation shell and an electromagnetic induction heater; when the self-heating heat-preservation shell is close to the electromagnetic induction heater, the quick recovery can be realized, and the recovery time can reach several seconds at the fastest.

The device and the method mentioned in the existing literature have certain effect on slowing down the temperature drop of the surface of the billet, but have the common problems that the surface oxidation of the billet cannot be effectively avoided, and the labor intensity of workers, the probability of production accidents and the maintenance cost of production equipment are increased.

Disclosure of Invention

An object of the utility model is to provide a slow down device of steel billet temperature drop and oxidation, overcome the not enough of prior art, reduce the oxidation and the rate of heat dissipation on steel billet surface to alleviate the follow-up technology degree of difficulty, and then reduce and maintain and manufacturing cost.

In order to achieve the above object, the utility model provides a following technical scheme: a device for slowing down temperature drop and oxidation of a steel billet is characterized by comprising: the device comprises a bin body, an inert gas inlet pipe and a conveying roller way; the bin body is a structure enclosed by a bottom plate, side walls and a top plate, a heat insulation layer is arranged on the inner wall of the bin body, a feeding hole and a discharging hole are respectively formed in two sides of the bin body, and a guide hole is formed in the bin body; one end of the inert gas inlet pipe extends into the bin body through the guide hole, and the other end of the inert gas inlet pipe is connected with an inert gas source; the conveying roller way is arranged in the bin body and is positioned at the lower part of the bin body.

As further described in the scheme, the heat-insulating layer is made of refractory heat-insulating material patches.

As a further description of the above scheme, the guide holes are multiple and are located at the top of the bin body; and an air inlet valve is arranged on the inert gas inlet pipe.

As a further description of the above scheme, the inert gas source is argon.

As a further description of the scheme, the pressure of the argon in the inert gas inlet pipe is 1200 Kpa-1500 Kpa.

As a further description of the above solution, at least one viewing window is provided on the side wall.

As further description of the scheme, the bottom of the bin body is provided with a pulley.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a setting in the storehouse body has reduced the rate of heat dissipation of steel billet to avoided the steel billet to be serious at naked hourglass state and air convection process heat dissipation, the steel billet is inside and outside, the too big condition of head and the tail difference in temperature takes place, has also avoided rolling in-process simultaneously because the temperature is uneven to cause rolling to extend inequality, produce rolling stress and rolling crackle.

2. The utility model discloses a set up the setting of inert gas intake pipe on the storehouse body, reduced the oxidation speed of steel billet, avoided forming the oxide of thick iron on the steel billet surface.

3. The utility model discloses an at the internal rollgang that is provided with in storehouse, the removal and the transport of steel billet can be convenient for.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a view taken along direction a of fig. 1.

In the figure: 1. a bin body; 11. a base plate; 12. a side wall; 13. a top plate; 2. a pulley; 3. a rollgang; 4. an inert gas inlet pipe; 5. and (4) an observation window.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

The embodiments of the invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1-2, an apparatus for reducing temperature drop and oxidation of a steel billet comprises: the device comprises a bin body 1, an inert gas inlet pipe 4 and a conveying roller bed 3; the bin body 1 is a structure enclosed by a bottom plate 13, a side wall 12 and a top plate 11, a heat insulation layer is arranged on the inner wall of the bin body 1, a feeding hole and a discharging hole are respectively arranged on two sides of the bin body 1, and a guide hole is also formed in the bin body 1; one end of an inert gas inlet pipe 4 extends into the bin body 1 through a guide hole, and the other end of the inert gas inlet pipe is connected with an inert gas source; wherein the conveying roller way 3 is arranged in the bin body 1 and is positioned at the lower part of the bin body 1. The design reduces the heat dissipation rate of the billet by the arrangement of the bin body 1, thereby avoiding the serious heat dissipation of the billet in a naked leakage state and the air convection process and the occurrence of the condition of overlarge temperature difference between the inside and the outside and the head and the tail of the billet, and simultaneously avoiding the uneven rolling extension, the rolling stress and the rolling cracks caused by the uneven temperature in the rolling process; in addition, the arrangement of the inert gas inlet pipe 4 arranged on the bin body 1 reduces the oxidation speed of the steel billet and avoids the formation of thicker iron oxide on the surface of the steel billet; meanwhile, a conveying roller way 3 is arranged in the bin body 1, so that the movement and conveying of the steel billets can be facilitated.

As shown in fig. 1-2, the insulating layer is made of refractory insulating material patch, specifically, zirconia patch. The guide holes are multiple and are positioned at the top of the bin body 1; an air inlet valve is arranged on the inert gas inlet pipe 4. The inert gas source is argon, and the pressure of the gas in the inert gas inlet pipe 4 is 1200-1500 Kpa.

As shown in fig. 1-2, the side wall 12 is provided with at least one viewing window 5; in order to facilitate the movement and transportation of the bin body 1, the bottom of the bin body 1 is provided with a pulley 2.

Specifically, after a billet of 25MnSiV steel produced by a certain plant leaves a heating furnace, the billet enters the bin body 1 through the conveying roller way 3, meanwhile, argon with the pressure of 1200Kpa is continuously input through the inert gas inlet pipe 4 connected with the argon pipeline, the protective atmosphere in the heat-insulating cover is maintained, and finally the bin body 1 is conveyed to a rolling mill through the bottom pulley 2 for subsequent rolling.

When the steel billet leaves the heating furnace, the surface average temperature is 700-800 ℃, when the steel billet is transported to a rolling mill through the device, the measured surface temperature of the steel billet is 645-753 ℃, the temperature drop in the whole process is about 50 ℃, the heat preservation effect is good, and the subsequent rolling is facilitated. In addition, under the protection of argon, the steel billet has no thick iron scale on the surface, and the effect of slowing down the oxidation of the steel billet surface is good.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A device for slowing down temperature drop and oxidation of a steel billet is characterized by comprising: a bin body (1), an inert gas inlet pipe (4) and a conveying roller way (3); the bin body (1) is a structure surrounded by a bottom plate (13), side walls (12) and a top plate (11), a heat insulation layer is arranged on the inner wall of the bin body (1), a feeding hole and a discharging hole are respectively formed in two sides of the bin body (1), and a guide hole is formed in the bin body (1); one end of the inert gas inlet pipe (4) extends into the bin body (1) through the guide hole, and the other end of the inert gas inlet pipe is connected with an inert gas source; the conveying roller way (3) is arranged in the bin body (1) and is positioned at the lower part of the bin body (1).

2. The apparatus of claim 1, wherein the insulation layer is made of a refractory insulation material.

3. The device for slowing down the temperature drop and the oxidation of the steel billet according to claim 1, characterized in that the guide holes are multiple and are positioned at the top of the silo body (1); an air inlet valve is arranged on the inert gas inlet pipe (4).

4. The apparatus of claim 1, wherein the inert gas source is argon.

5. The apparatus for slowing the temperature drop and oxidation of the steel billet according to claim 1, wherein the gas pressure in the inert gas inlet pipe (4) is 1200-1500 Kpa.

6. The apparatus for slowing the temperature drop and oxidation of steel blanks according to claim 1, wherein the side wall (12) is provided with at least one observation window (5).

7. The device for slowing down the temperature drop and the oxidation of the steel billets as claimed in claim 1, characterized in that a pulley (2) is arranged at the bottom of the bin body (1).

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