CN216473307U

CN216473307U - Novel furnace body slag trap of 120t converter

Info

Publication number: CN216473307U
Application number: CN202122296353.9U
Authority: CN
Inventors: 何程亮; 刘文志
Original assignee: Yangchun New Iron and Steel Co Ltd
Current assignee: Yangchun New Iron and Steel Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-05-10
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a novel furnace body slag trap of a 120t converter, wherein the slag trap is welded with a support frame in a furnace body by short welding, the slag trap comprises an upper slag trap and a lower slag trap, the upper slag trap and the lower slag trap are both formed by rolling a whole steel plate, bolt holes are arranged on two sides of the upper slag trap and two sides of the lower slag trap and are connected with the support frame by high-strength bolts, a reinforcing rib group is additionally arranged on the inner side of the upper slag trap, a reinforcing rib group is additionally arranged on the inner side of the lower slag trap, the reinforcing rib group on the upper slag trap is formed by welding and splicing three transverse ribs and three longitudinal ribs, the reinforcing rib group on the lower slag trap is formed by welding and splicing five transverse ribs and three longitudinal ribs, and the transverse ribs are lengthened in a ladder way; the slag trap can be ensured not to be broken due to local thermal stress to cause acute deformation of the corner part, the gap between the slag trap and the furnace cap section is reduced, the wrapping damage to a cooling water pipeline during slag overflow is avoided, the furnace shutdown maintenance time is reduced, the labor intensity of furnace body slag trap replacement operation is reduced, and long-term use is realized.

Description

Novel furnace body slag trap of 120t converter

Technical Field

The utility model relates to the technical field of converters in steel plants, in particular to a novel furnace body slag baffle of a 120t converter.

Background

The converter is a key equipment system in the steelmaking process, and the furnace body is an important component of the converter system. The furnace body slag trap mainly protects a furnace body cooling water pipeline and red slag generated when slag overflow occurs in the smelting process and the like and flows into the furnace along the slag trap; the steel slag adhered on the slag blocking plate is stirred and cleaned by using a furnace dismantling machine, the working condition temperature of the surface of the slag blocking plate is constant at about 300 ℃, the instantaneous high temperature of the slag blocking plate can reach 1200 ℃ or above when the slag is overflowed, the working condition temperature difference is large, and the slag blocking plate is easy to be heated after being used for a period of time to generate deformation, so that the service life is influenced. Most of converter body slag baffles are divided into an upper layer slag baffle and a lower layer slag baffle, the slag baffles are arc-shaped, are positioned by taking a steel tapping hole as a center during installation and are sequentially fixed, assembled and used; the furnace body slag baffle plate consists of 24 blocks; the slag trap is installed and fixed with a support frame by using bolts, and the support frame is fixed with the furnace body by welding; the furnace body needs longer time for installation and is easy to accumulate slag when the number of the slag baffles is large, and the furnace body is easy to deform by heating when the number of the slag baffles is small; the corner of the slag baffle is deformed to snap the connecting bolt along with the splashing or slag overflow generated by smelting, the vibration for cleaning accumulated slag and the like, and then rapid coil-shaped deterioration is generated, so that the accumulated slag is wrapped on a cooling water pipeline of a furnace body, the furnace is forced to be shut down, and the slag baffle is replaced, thereby seriously restricting the production rhythm and the effective operation rate.

Based on the technical scheme, the utility model designs a novel 120t converter body slag trap to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel furnace body slag trap of a 120t converter, which can ensure that the slag trap does not generate sharp corner deformation caused by bolt stretching due to local thermal stress by additionally arranging a reinforcing rib group at the inner side of an upper slag trap and a reinforcing rib group at the inner side of a lower slag trap, reduce a gap between the slag trap and a furnace cap section, avoid the adhesion of cooling water pipelines during slag overflow, reduce the time of furnace shutdown and maintenance, reduce the labor intensity of the replacement operation of the furnace body slag trap, realize long-term use and solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the slag blocking plate and the support frame in the furnace body are welded in a short welding mode, the slag blocking plate comprises an upper slag blocking plate and a lower slag blocking plate, the upper slag blocking plate and the lower slag blocking plate are formed by rolling a whole steel plate, bolt holes are formed in the two sides of the upper slag blocking plate and the two sides of the lower slag blocking plate and are connected with the support frame through high-strength bolts, reinforcing rib groups are additionally arranged on the inner side of the upper slag blocking plate, reinforcing rib groups are additionally arranged on the inner side of the lower slag blocking plate, the reinforcing rib groups on the upper slag blocking plate are formed by welding three transverse ribs and three longitudinal ribs, the reinforcing rib groups on the lower slag blocking plate are formed by welding five transverse ribs and three longitudinal ribs, and the transverse ribs are lengthened in a stepped mode.

Preferably, the interval between the slag blocking plate and the welding line of the support frame in the furnace body is 150mm, the length of the welding line is 100mm, and the height of the welding line is 2/3 of the thickness of the slag blocking plate.

Preferably, the upper slag trap and the lower slag trap are both made of steel plates with the material Q3454-A and the material delta being 30 mm.

Preferably, the distance between adjacent threaded holes is not more than 400 mm.

Preferably, the transverse ribs and the longitudinal ribs are both made of steel plates with the diameter delta equal to 16 mm.

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

according to the utility model, the reinforcing rib group is additionally arranged on the inner side of the upper slag trap and the reinforcing rib group is additionally arranged on the inner side of the lower slag trap, so that the slag trap is prevented from being subjected to rapid deformation of the corner part due to the fact that bolts are broken due to local thermal stress, the gap between the slag trap and the furnace cap section is reduced, the adhesion of cooling water pipelines during slag overflow is avoided, the furnace shutdown maintenance time is reduced, the labor intensity of furnace body slag trap replacement operation is reduced, and long-period use is realized.

Drawings

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

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic illustration of a monolithic slag trap construction of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution of a novel slag trap for a 120t converter: the slag blocking plate and the support frame in the furnace body are welded in a short welding mode, the slag blocking plate comprises an upper slag blocking plate 1 and a lower slag blocking plate 2, the upper slag blocking plate 1 and the lower slag blocking plate 2 are formed by rolling a whole steel plate, bolt holes 3 are formed in two sides of the upper slag blocking plate 1 and two sides of the lower slag blocking plate 2 and are connected with the support frame through high-strength bolts, reinforcing rib groups are additionally arranged on the inner side of the upper slag blocking plate 1, reinforcing rib groups are additionally arranged on the inner side of the lower slag blocking plate 2, the reinforcing rib groups on the upper slag blocking plate 1 are formed by welding three transverse ribs and three longitudinal ribs, the reinforcing rib groups on the lower slag blocking plate 2 are formed by welding five transverse ribs and three longitudinal ribs, and the transverse ribs are lengthened in a stepped mode.

The interval between the slag blocking plate and the welding line of the support frame in the furnace body is 150mm, the length of the welding line is 100mm, and the height of the welding line is 2/3 mm.

The upper slag trap and the lower slag trap are both made of steel plates with the material Q3454-A and the material delta being 30 mm.

Wherein the distance between adjacent threaded holes is not more than 400 mm; the transverse ribs and the longitudinal ribs are both made of steel plates with the delta being 16 mm.

The specific working principle is as follows:

the converter body slag baffle plate is arranged outside the furnace cap and mainly used for protecting and avoiding the corrosion of the overflowing red slag to a cooling system during smelting; the slag baffle is arranged outside the furnace cap in a 360-degree manner according to a certain angle; the slag baffle is divided into an upper layer and a lower layer, and is arranged on the supporting frame in a stepped manner, one end of the supporting frame is welded and fixed with the furnace body guard plate, and the other end of the supporting frame is welded and fixed with the furnace body; the slag trap and the support frame are connected by bolts, and the slag trap and the support frame are fixed by pattern welding after the bolts are connected, so that the rigidity strength of the slag trap and the support frame is increased; the slag trap is mainly used for shielding a furnace cap cooling system, smelting overflow red slag slides to the lower part of a furnace separately through the slag trap, the long-term working temperature is 300 ℃, the instantaneous temperature can reach 1200 ℃ when the red slag overflows, the operation is repeated and alternated, the slag trap is easy to be heated and deformed after a certain time, and once the slag is deformed, the red slag is easy to enter the inner side to damage the furnace cap cooling system; the reinforcing ribs are uniformly arranged on the inner side of the slag baffle in combination with the site working conditions and the structure, so that the rigidity strength of the slag baffle is improved, the service cycle is greatly prolonged, and the daily maintenance workload is reduced.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a novel furnace body slag trap of 120t converter, slag trap and furnace body inner support frame adopt short welding which characterized in that: the slag blocking plate comprises an upper slag blocking plate (1) and a lower slag blocking plate (2), the upper slag blocking plate (1) and the lower slag blocking plate (2) are all formed by rolling a whole steel plate, bolt holes (3) are formed in the two sides of the upper slag blocking plate (1) and the lower slag blocking plate (2) and are connected with a support frame through high-strength bolts, reinforcing rib groups are additionally arranged on the inner side of the upper slag blocking plate (1), reinforcing rib groups are additionally arranged on the inner side of the lower slag blocking plate (2), the reinforcing rib groups on the upper slag blocking plate (1) are formed by welding three transverse ribs and three longitudinal ribs, the reinforcing rib groups on the lower slag blocking plate (2) are formed by welding five transverse ribs and three longitudinal ribs, and the transverse ribs are lengthened in a stepped manner.

2. The novel furnace body slag trap of the 120t converter according to claim 1, characterized in that: the interval between the slag blocking plate and the welding line of the support frame in the furnace body is 150mm, the length of the welding line is 100mm, and the height of the welding line is 2/3 of the thickness of the slag blocking plate.

3. The novel furnace body slag trap of the 120t converter according to claim 1, characterized in that: the upper slag trap (1) and the lower slag trap (2) are both made of steel plates with the material quality Q3454-A and delta being 30 mm.

4. The novel furnace body slag trap of the 120t converter according to claim 1, characterized in that: the distance between the adjacent bolt holes (3) is not more than 400 mm.

5. The novel furnace body slag trap of the 120t converter according to claim 1, characterized in that: the transverse ribs and the longitudinal ribs are both made of steel plates with the delta being 16 mm.