CN209854186U - Blast furnace distributing chute - Google Patents

Abstract

The utility model discloses a blast furnace distribution chute belongs to blast furnace ironmaking technical field. The chute comprises a goose head body and a chute body, wherein the chute body is of a groove-shaped structure with an opening at the upper end, the goose head body is arranged at the front end of the chute body and is connected with the chute body, a blanking lining plate and a flow lining plate are arranged at the bottom of the chute body, and material blocking lining plates are arranged on two sides of the chute body; the material blocking lining plate is provided with a grid groove; the grid groove is formed by a plurality of oblique long strips in a crossed arrangement. The utility model discloses can reduce the impact and the wearing and tearing of material to the chute effectively, improve the life of chute.

Description

Blast furnace distributing chute

Technical Field

The utility model belongs to the technical field of blast furnace ironmaking, more specifically say, relate to a blast furnace cloth chute.

Background

The blast furnace burden distribution chute is one of the indispensable equipments of bell-less blast furnace ironmaking, and it is responsible for the task of finally rotating burden distribution into the furnace. However, the distribution chute still needs to bear the scouring of the charging materials after working in the environment of high temperature, strong corrosive gas and heavy dust for a long time, so the distribution chute is subject to the problem that the blast furnace needs to be replaced every year. At present, a goose head body and a groove body of the blast furnace distributing chute are connected by bolts and welded, the groove body is thinner, the wear-resistant alloy subjected to surface surfacing welding is easy to fall off under the impact of high temperature and materials, and a material flow area is U-shaped. For the distribution chute, after the distribution chute is used for two months, the chute body is easy to deform, the abrasion-resistant alloy is seriously fallen, the distribution of a blast furnace is influenced, and the production process is also influenced. Therefore, there is a need for improvements in blast furnace distribution chutes.

The Chinese patent application numbers are: CN201721643748.9, published date: patent literature 8/14/2018 discloses a novel blast furnace distribution chute, which comprises a goose head body and a chute body, wherein the front section of the chute body is provided with a U-shaped groove, the rear section of the chute body is a rectangular groove, one end of the U-shaped groove is high, the other end of the U-shaped groove is low, one end of the U-shaped groove which is low is flush with the groove surface of the rectangular groove, and the U-shaped groove and the groove surface of the rectangular groove are both provided with wear-resistant blocks. The utility model discloses a through set up goose head body and cell body into integral type casting structure and increase the intensity of chute and reduce the impact of material to the cell body with the mode of cell body thickening to strengthen the life of this chute. However, the alloy blocks in the chute still have the danger of falling under the impact of material flow, and the material also inevitably collides and rubs with the two sides of the chute when falling, and the arrangement that the impact of the material falling above the chute is not slowed down on the side plates at the two ends of the chute is large for the abrasion of the side plates of the chute and has large impact force for the bottom plate.

The Chinese patent application numbers are: CN201721286812.2, published date: patent document 5/29/2018 discloses a distribution chute liner plate, which comprises: a substrate, wherein a plurality of grooves are formed on one side surface of the substrate; the alloy blocks are respectively embedded in the grooves; and a transition plate made of steel, the transition plate being disposed on the alloy block; the base plate, the alloy block and the transition plate are welded into a whole through brazing. The utility model discloses a through the compound mode who changes the cloth chute welt, the effectual stand wear and tear performance that has improved life, and then has postponed the whole life of cloth chute, has guaranteed the reliability in the cloth chute life cycle. But it has the great problem of wearing and tearing between chute both sides and the material equally, and the alloy piece of this chute, base and the cab apron welding of crossing are a whole for the maintenance of equipment is comparatively difficult, and in case some equipment takes place to damage just probably need change whole chute, has increased cost of maintenance.

Disclosure of Invention

1. Problems to be solved

To the easy wearing and tearing of current blast furnace cloth chute both sides board, and strike great problem that leads to chute life not high to the chute bottom plate, the utility model provides a blast furnace cloth chute through to the structural improvement of chute, has reduced the impact and the wearing and tearing of material to the chute effectively, has improved the life of chute.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A blast furnace distributing chute comprises a goose head body and a chute body, wherein the chute body is of a groove-shaped structure with an opening at the upper end, the goose head body is arranged at the front end of the chute body and is connected with the chute body, a blanking lining plate and a flow lining plate are arranged at the bottom of the chute body, and material blocking lining plates are arranged on two sides of the chute body; the material blocking lining plate is provided with a grid groove; the grid groove is formed by a plurality of oblique long strips in a crossed arrangement.

As a further improvement of the technical proposal, the inclination of the strip block relative to the horizontal plane is 30-50 degrees.

As a further improvement of the technical scheme, the depth of the grid groove is 30mm-50 mm.

As a further improvement of the technical scheme, the material blocking lining plate is fixedly connected with the chute body through bolts.

As a further improvement of the technical scheme, the chute body is of a rectangular groove-shaped structure.

As a further improvement of the technical scheme, a blanking groove extending along the width direction of the blanking lining plate is arranged on the blanking lining plate.

As a further improvement of the technical scheme, the side surface of the charging chute is of an inclined plane type structure.

As a further improvement of the technical proposal, the inclination of the inclined plane of the charging chute is 30-50 degrees.

As a further improvement of the technical scheme, wear-resistant alloy particles are uniformly embedded in the flow lining plate.

As a further improvement of the technical scheme, the wear-resistant alloy particles are tungsten carbide particles.

As a further improvement of the technical scheme, wear-resistant alloy blocks are uniformly embedded on the flow lining plate.

3. Advantageous effects

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

(1) the utility model relates to a blast furnace cloth chute, through the fender material welt that has the grid groove of installation in the both sides of chute body, can be blockked by the next door of grid groove promptly long piece when making the material fall from the top of chute body, on the one hand can reduce the friction of material and chute body side, on the other hand also can cushion the impact of material to the chute bottom, improve the life of chute, in addition, the grid groove still possesses the effect of storage, make the material persist in the grid groove, realize the material phenomenon of beating, especially, the grid groove makes the material can slide off gradually along the inclined plane of long piece by the mode of the rectangular piece cross arrangement of slope, and if vertically and horizontally staggered rectangular piece, the material is likely to collide and splash to the chute body with the plane of long piece when falling, cause the waste of material and pollute the surrounding environment;

(2) the utility model relates to a blast furnace distributing chute, the gradient of the long strip block and the depth of the grid groove are the best implementation range summarized by a large amount of practices, the grid groove in the range can achieve the best buffering and wear-resisting effect, and the service life of the chute is prolonged;

(3) the utility model relates to a blast furnace distributing chute, the material blocking lining plate is fixedly connected with the chute body through bolts instead of welding, so that the material blocking lining plate is quickly assembled and disassembled and is easy to replace when damaged;

(4) the utility model relates to a blast furnace distribution chute, which adopts a chute body with a rectangular groove-shaped structure, so that the material is more frequently contacted with a grid groove when falling, and the distribution of the chute is more uniform and accurate;

(5) the utility model relates to a blast furnace distributing chute, the blanking groove on the blanking lining board can store the material that falls first in the groove, the material that falls subsequently can hit hits on the material in the groove, realize the material and beat the material function, reduced the impact of material to the blanking lining board effectively, improved the life of blanking lining board, and the side of blanking groove adopts the inclined plane structure of the inclination of settlement, make the material especially the first batch of material can fall on the inclined plane and slide to the groove, cushion the impact of material to the blanking lining board;

(6) the utility model relates to a blast furnace cloth chute evenly inlays on the flowing material welt and has wear-resisting alloy granule, has strengthened the wearability that the chute rear end especially chute export goes out greatly, has improved the life of chute, and the cost of this granule is lower, inlays the degree of difficulty and compares alloy piece greatly reduced, when adopting the tungsten carbide granule as the wear-resisting alloy granule, and the wearability reinforcing to the particle diameter material between 20mm ~ 30mm is most obvious.

Drawings

FIG. 1 is a front sectional view of the chute of the present invention;

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

FIG. 3 is a sectional view taken along line b-b in FIG. 1;

in the figure: 1. a goose head body; 2. a chute body; 21. blanking lining plates; 211. a charging chute; 22. a fluid liner plate; 221. wear-resistant alloy particles; 23. a material blocking lining plate; 231. and (4) grid grooves.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

As shown in fig. 1, 2 and 3, a blast furnace distribution chute is installed at the top end of a blast furnace body for supplying materials into the blast furnace. This blast furnace cloth chute mainly includes goose head body 1 and chute body 2, and the front end of goose head body 1 and chute body 2 passes through bolt fixed connection, and wherein, goose head body 1 is the installation department of chute, and the chute passes through goose head body 1 and installs on the mounting bracket of blast furnace top, and chute body 2 is used for accepting the material that the conveyer was carried and makes the material flow in the blast furnace body. The specific structure of the chute body 2 will be described in detail below.

The chute body 2 is of a rectangular groove-shaped structure with an opening at the upper end and is mainly divided into a front blanking area and a rear material flowing area. Wherein, the blanking lining plate 21 is fixedly arranged at the bottom of the chute body 2 of the front material flow area through bolts, and as the blanking area is a main area where materials fall into the chute body 2, the impact force of the materials is mainly applied to the blanking lining plate 21 in the area, which is easy to damage the blanking lining plate 21. In order to solve this problem, in the present embodiment, the blanking lining plate 21 is provided with the blanking groove 211 extending in the width direction of the blanking lining plate 21, and the blanking groove 211 is formed by a plurality of long blocks deposited on the blanking lining plate 21 in the width direction of the blanking lining plate 21. When the material falls into the blanking area, the blanking groove 211 can be filled up at first, and the material falling into the blanking groove 211 can collide with the material in the blanking groove before flowing to the chute outlet. Through the structure of this kind of material knockout, it has one deck material buffer layer to make between the bottom of material and chute body 2 to reduce the impact of material to chute body 2 effectively, improved the life of chute. In addition, the side of charging conduit 211 is the inclined plane formula structure that has certain inclination, and this kind of inclined plane formula structure makes the material especially the first batch material that falls into in the chute can fall on the inclined plane earlier, and in following with the inclined plane slip-in charging conduit 211, further cushioned the material and beaten the blanking welt 21, improved the life of blanking welt 21. After a large number of practical summaries, it is found that when the inclination of the side surface of the charging chute 211 relative to the horizontal plane is 30 to 50 degrees, the buffering effect on the impact force of the material is good, the inclination of the side surface of the charging chute 211 of the embodiment is 40 degrees, which is an optimal range in the parameter range, and particularly, the buffering effect on the material with the particle size of 20mm to 30mm is very obvious.

After the material falls into the blanking district, can flow in chute body 2, fall into in the blast furnace body from chute body 2's rear end export behind rear portion material flow district, consequently the material is the mobile state in rear portion material flow district mainly, and what mainly takes place between the bottom of chute body 2 in rear portion material flow district is the friction motion, can cause wearing and tearing to the chute bottom in rear portion material flow district in the long-term use. To solve this problem, in this embodiment, the chute body 2 in the rear material flowing region is fixedly installed with the material flowing lining plate 22 at the bottom through the bolt, and the material flowing lining plate 22 is inlaid with the wear-resistant alloy block, so as to increase the wear resistance of the material flowing lining plate 22 and improve the service life thereof, the material of the wear-resistant alloy block can adopt various common wear-resistant alloys such as high manganese alloy, tungsten carbide alloy and the like, and the embodiment adopts tungsten carbide alloy.

In addition, although the impact resistance and the wear resistance of the bottom of the chute body 2 are improved by the blanking lining plate 21 and the material lining plate 22, the two sides of the chute body 2 are abraded by rubbing with the falling material during the falling of the material. To this problem, this embodiment installs a rectangle material blocking liner plate 23 respectively through the bolt in the both sides of chute body 2. A plurality of strip blocks inclined in the length direction of the material blocking liner 23 are formed on the material blocking liner 23 by a build-up welding method, the strip blocks are arranged on the surface of the material blocking liner 23 in a crossed manner, and grid grooves 231 are formed on the material blocking liner 23. The existence of this net groove 231 can reduce the friction of material and chute body 2 side on the one hand, and on the other hand also can cushion the impact of material to the chute bottom, improves the life of chute. Moreover, the grid groove 231 also has partial materials in the actual working process of the chute, so that the material beating phenomenon is realized on the two sides of the chute body 2, and the impact force of the materials is further buffered. Because rectangular piece is the structure that the slope was arranged, when the material fell into chute body 2 in, the material that falls to on the inclined plane of rectangular piece can be along with the inclined plane of rectangular piece landing gradually to chute body 2 in to reduce the impact force of material to the chute bottom. If criss-cross rectangular blocks are adopted, the material is likely to collide with the plane of the rectangular blocks and splash to the outside of the chute body 2 when falling, which causes waste of the material and pollutes the surrounding environment. Through a large number of production practices, the material blocking lining plate 23 has a better effect when the inclination of the long strip blocks is 30-50 degrees relative to the horizontal plane and the depth of the grid groove 231 is 30-50 mm. The inclination of the long blocks in the embodiment is 40 degrees, the depth of the grid grooves 231 is 40mm, the buffering effect on the materials with the particle size of 20 mm-30 mm is best, and the abrasion resistance of the side wall is improved to the maximum.

In conclusion, the embodiment provides a blast furnace distributing chute, through the improvement to chute bottom and side, has reduced the impact and the wearing and tearing of material to the chute effectively, has improved the life of chute.

Example 2

The blast furnace distribution chute of example 1 has improved the service life of the chute by improving the bottom and sides of the chute body 2, however, it has a disadvantage in embedding the wear-resistant alloy blocks on the flow liner 22 of the rear flow area. Although the wear-resistant alloy blocks can improve the wear resistance of the flow lining plate 22, the wear-resistant alloy blocks have large volume and high cost, and once the wear-resistant alloy blocks are partially damaged, the replacement or re-embedding of the wear-resistant alloy blocks is very troublesome, and the whole flow lining plate 22 is often required to be replaced. The present embodiment addresses this problem by providing an improvement to the liner 22 over embodiment 1.

In this embodiment, the wear-resistant alloy blocks on the flow lining plate 22 in embodiment 1 are replaced by wear-resistant alloy particles 5, and the wear-resistant alloy particles 5 have a particle size of 10mm to 20mm and are uniformly embedded on the flow lining plate 22. The wear-resistant alloy particles 5 are small in particle size and low in cost, when the wear-resistant alloy particles are damaged, new wear-resistant alloy particles 5 can be conveniently embedded again due to the small size of the wear-resistant alloy particles, the whole flow lining plate 22 does not need to be replaced, and the maintenance cost is saved while the wear resistance of the flow lining plate 22 is ensured. The particle size of the wear-resistant alloy particles 5 in the embodiment is 15mm, and tungsten carbide is used as a material, so that the wear-resistant effect on materials with the particle size of 20 mm-30 mm is particularly obvious.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a blast furnace cloth chute, includes goose head body (1) and chute body (2), and chute body (2) are upper end open-ended trough-shaped structure, and goose head body (1) sets up the front end at chute body (2) and is connected its characterized in that with chute body (2): the bottom of the chute body (2) is provided with a blanking lining plate (21) and a material flowing lining plate (22), and the two sides of the chute body are provided with material blocking lining plates (23); the material blocking lining plate (23) is provided with a grid groove (231); the grid grooves (231) are formed by a plurality of inclined long strips which are arranged in a crossed mode.

2. The blast furnace distribution chute of claim 1, wherein: the inclination of the strip blocks relative to the horizontal plane is 30-50 degrees.

3. A blast furnace distribution chute as claimed in claim 2 wherein: the depth of the grid grooves (231) is 30mm-50 mm.

4. A blast furnace distribution chute as claimed in claim 3 wherein: the material blocking lining plate (23) is fixedly connected with the chute body (2) through bolts.

5. The blast furnace distribution chute of claim 1, wherein: the chute body (2) is of a rectangular groove-shaped structure.

6. The blast furnace distribution chute of claim 1, wherein: the blanking lining plate (21) is provided with a blanking groove (211) extending along the width direction of the blanking lining plate (21).

7. The blast furnace distribution chute of claim 6, wherein: the side surface of the charging chute (211) is of an inclined plane type structure.

8. The blast furnace distribution chute of claim 7, wherein: the inclination of the inclined plane of the charging chute (211) is 30-50 degrees.

9. The blast furnace distribution chute of claim 1, wherein: wear-resistant alloy particles (221) are uniformly embedded in the flow lining plate (22).

10. The blast furnace distribution chute of claim 1, wherein: wear-resistant alloy blocks are uniformly embedded in the flow lining plate (22).