CN217342259U

CN217342259U - Metal foreign matter intercepting grid of blast furnace feeding weighing hopper

Info

Publication number: CN217342259U
Application number: CN202221074101.XU
Authority: CN
Inventors: 邓家云; 李岳; 韩伟; 黎茂; 李大明; 潘小晨
Original assignee: Liuzhou Iron and Steel Co Ltd
Current assignee: Liuzhou Iron and Steel Co Ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-09-02
Anticipated expiration: 2032-05-07

Abstract

The utility model discloses a metal foreign body intercepting grid of a blast furnace feeding weighing hopper, which relates to the technical field of steel smelting machinery, and comprises a grid framework and grid replacement parts, wherein the grid framework and the grid replacement parts are welded into a grid shape by a plurality of criss-cross steel plates; the grid replacing part is provided with a cross clamping groove matched with a cross intersection in the grid framework, the grid replacing part is sleeved on the top of the grid framework, and a 10-15 mm gap is formed between every two adjacent grid replacing parts; after the grid framework is sleeved with the grid replacement part, the size of the inner wall of a single grid opening ranges from 250mm multiplied by 250mm to 260mm multiplied by 260 mm. The utility model can solve the problems that the foreign matter interception grating in the existing blast furnace feeding weighing hopper is easy to wear, the maintenance frequency is high and the maintenance is inconvenient.

Description

Metal foreign matter interception grid of blast furnace feeding weighing hopper

Technical Field

The utility model belongs to the technical field of steel smelting machinery technique and specifically relates to an interception grid that is arranged in blast furnace material loading weighing hopper to intercept metallic foreign matter.

Background

In the feeding process of the blast furnace, raw materials required by the blast furnace are screened by a vibrating screen, the appropriate raw materials are screened to a weighing hopper, and then the raw materials are fed to the blast furnace in a belt conveying mode. In the process, the raw coke is screened out by a coke screen to obtain the coke with the granularity larger than 25mm, the raw sinter is screened out by a sinter screen to obtain the sinter with the granularity larger than 6mm, the metal foreign matters (such as reinforcing steel bars, waste steel plates and I-shaped steel) in the raw material can not be screened out, and the metal foreign matters can fall onto a weighing hopper and a belt along with the raw material. If the metal foreign matter can not be intercepted in time, fall on the belt, can puncture the belt finally and lead to the belt to tear, cause serious influence to production.

In order to intercept the metal foreign matters, a conventional method is to install a foreign matter intercepting grid in a weighing hopper, the conventional metal foreign matter intercepting grid is generally welded into a grid shape by adopting a Q235B steel plate, and the conventional grid has the following problems in the use process: because the unloading is frequent, the grid receives impact wear easily, and grid wearing and tearing are fast, often need the maintainer to advance to repair welding to the grid in the weighing hopper, and the maintainer is inconvenient repair welding in the weighing hopper for repair welding time is of a specified duration, and the maintenance frequency is high, can not satisfy the requirement of blast furnace continuous feeding.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a blast furnace material loading weighing hopper metal foreign matter interception grid is provided, it can solve the easy wearing and tearing of foreign matter interception grid in the current weighing hopper, and maintenance frequency is high and the inconvenient problem of maintenance.

In order to solve the above problem, the technical scheme of the utility model is that: this kind of blast furnace material loading weighing hopper metal foreign matter interception grid includes the grid skeleton that welds into the graticule form by the steel sheet of polylith vertically and horizontally crossing, its characterized in that: also comprises a grid replacing part; the grid is changed the piece be provided with cross clamping groove in the grid skeleton cross assorted, the direct card cover of cross clamping groove during installation on the grid skeleton, two liang of adjacent the grid is changed the piece and is had 10 ~ 15mm clearance.

In the above technical solution, a more specific solution is: after the grid framework is sleeved with the grid replacement part, the size of the inner wall of a single grid opening ranges from 250mm to 260mm, so that materials can be prevented from being accumulated on the grid, and metal foreign matters in raw materials can be effectively intercepted.

Further: grid skeleton welded mounting is inside the weighing hopper, the vertical height of grid skeleton top and shale shaker discharge gate is 300 ~ 700mm to guarantee that the falling point scope of raw materials on the grid is in shale shaker discharge gate horizontal direction 0 ~ 500mm, the grid is changed a piece and is installed in the blanking scope on the grid skeleton.

Further: the grid framework adopts a Q235B steel plate; the grid replacement part adopts a Q345 steel plate.

Due to the adoption of the technical scheme, compared with the prior art, the utility model following beneficial effect has:

the utility model discloses install grid skeleton welding in the weighing hopper, change the mounted position of piece according to the material blanking point determination grid on the grid, the grid is changed after the piece is installed grid skeleton, and the inner wall size of single check net mouth is 250X 250mm ~ 260X 260mm, and this size can not lead to the material to pile up on the grid to metal foreign matter in the raw materials also can effectively intercept, when the point is examined and is found to intercept metal foreign matter on the grid, take out metal foreign matter; when point inspection shows that a grid replacement part on the grid is seriously worn and a grid framework is about to be worn by materials, the worn grid replacement part is taken out, a new grid replacement part is installed, and the replacement is convenient and short in time; the problem of original blast furnace material loading weighing hopper grid for ordinary steel sheet assembly welding preparation, grid wearing and tearing frequency is high, often needs the maintainer to get into the repair welding maintenance in the weighing hopper, welding operation difficulty in the weighing hopper, consuming time for a long time, maintenance frequency is high is solved.

Drawings

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

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural view of a grille replacing member of the present invention;

fig. 4 is a schematic view of the present invention.

The reference numbers in the figures denote:

1. intercepting a grating framework; 2. raw materials; 3. vibrating screen; 3-1, a discharge port of a vibrating screen; 4. a weighing hopper; 5. a conveyor belt; 6. a grid replacement member; 6-1 and a cross clamping groove.

Detailed Description

The invention will be further described with reference to the following figures and examples:

the metal foreign body intercepting grid of the blast furnace feeding weighing hopper in figures 1, 2, 3 and 4 comprises a grid framework 1 and a grid replacing part 6; the grid framework 1 is in a grid shape formed by welding a plurality of criss-cross Q235B steel plates; the grid replacing parts 6 are provided with cross clamping grooves 6-1 matched with cross parts in the grid framework 1, the grid replacing parts are directly sleeved on the top of the grid framework 1 during installation, and gaps of 10-15 mm are formed between every two adjacent grid replacing parts 6; after the grid framework 1 is sleeved with the grid replacing part 6, the size of the inner wall of a single grid opening is 250 multiplied by 250 mm-260 multiplied by 260mm, the accumulation of materials on the grid can be avoided by the size, and metal foreign matters in raw materials can be effectively intercepted.

The grid framework 1 is welded and installed inside the weighing hopper 4, the vertical height between the top of the grid framework 1 and a discharge port 3-1 of the vibrating screen is 300-700 mm, so that the falling point range of the raw material 2 on the grid is within 0-500 mm of the horizontal direction of the discharge port 3-1 of the vibrating screen, a grid replacing part 6 is installed in the falling range, the grid replacing part 6 is equivalent to an outer lining plate of the grid framework 1, and the grid replacing part 6 is a Q345 steel plate; when the grid replacement part 6 is worn seriously and cannot be used continuously, the worn grid replacement part 6 is taken out and replaced.

As shown in fig. 4, in the charging process of the blast furnace, raw materials 2 required by the blast furnace are screened by a vibrating screen 3, the screened qualified raw materials 2 fall to a weighing hopper 4, after the raw materials 2 fall to the weighing hopper 4, metal foreign matters mixed in the raw materials 2 are intercepted by a grating consisting of a grating framework 1 and a grating replacing part 6, finally the raw materials 2 are transported to the blast furnace by a belt 5, the intercepted metal foreign matters fall on the top of the grating, and the metal foreign matters are taken out manually; if the grid replacement part 6 is worn out too much and cannot be used further, the worn grid replacement part 6 is taken out and replaced.

Claims

1. The utility model provides a blast furnace material loading weighing hopper metal foreign matter interception grid, it includes welds into the grid skeleton of graticule mesh shape by the steel sheet of polylith vertically and horizontally crossing, its characterized in that: also comprises a grid replacing part; the grid is changed the piece and is provided with in the grid skeleton cross department assorted cross draw-in groove, the grid is changed the suit and is in on the grid skeleton top.

2. The blast furnace feeding weighing hopper metal foreign matter intercepting grid of claim 1, characterized in that: after the grid framework is sleeved with the grid replacement part, the size of the inner wall of a single grid opening ranges from 250mm multiplied by 250mm to 260mm multiplied by 260 mm.

3. The blast furnace charging weighing hopper metal foreign matter intercepting grid of claim 2, characterized in that: grid skeleton welded mounting is inside the weighing hopper, the vertical height of grid skeleton top and shale shaker discharge gate is 300 ~ 700mm, and the falling point scope of raw materials on the grid is in shale shaker discharge gate horizontal direction 0 ~ 500mm, the grid is changed the piece and is installed in the blanking scope on the grid skeleton.

4. The blast furnace charging weighing hopper metal foreign matter intercepting grid of claim 3, characterized in that: the grid framework adopts a Q235B steel plate; the grid replacing piece adopts a Q345 steel plate.