CN207727102U - A kind of novel blast furnace material distribution chute - Google Patents

Abstract

The utility model discloses a novel blast furnace material distributing chute, which comprises a goose head body and a trough body. The front part of the trough body is provided with a U-shaped trough, and the rear part is a rectangular trough. One end of the U-shaped trough is high and the other end is low. The lower end of the U-shaped groove is flush with the groove surface of the rectangular groove, and both the U-shaped groove and the groove surface of the rectangular groove are provided with wear-resistant blocks. The utility model has the advantages of long service life, wear resistance of the tank body, convenient maintenance and low cost.

Description

A New Blast Furnace Distribution Chute

technical field

The utility model relates to the technical field of ironmaking equipment, in particular to a novel blast furnace material distribution chute.

Background technique

Blast furnace distribution chute is one of the essential equipment for bellless blast furnace ironmaking, it is responsible for the final task of rotating the distribution into the furnace. However, since the distributing chute has been working in the environment of high temperature, strong corrosive gas and heavy dust for a long time, and also bears the scour of the furnace charge, the distributing chute is faced with the problem that the blast furnace needs to be replaced every year when it is closed. In the current blast furnace distribution chute, the goose head body and the trough body are connected by bolts and welded. The thickness of the trough body is relatively thin. The wear-resistant alloy surfacing on the surface is easy to fall off under high temperature and material impact, and the material flow area is U-shaped. For such a distribution chute, after two months of use, the trough body is easily deformed, and the wear-resistant alloy falls off seriously, which affects the distribution of blast furnace materials and also affects the production process. Therefore, it is necessary to improve the blast furnace distribution chute.

Contents of the invention

The utility model aims at the deficiencies of the prior art and provides a novel blast furnace material distribution chute with long service life, wear-resistant trough body, convenient maintenance and low cost.

In order to achieve the above purpose, the new blast furnace distribution chute designed by the utility model includes a goose head body and a trough body. One end of the U-shaped groove is high and the other end is low, and the lower end of the U-shaped groove is flush with the groove surface of the rectangular groove, and both the U-shaped groove and the groove surface of the rectangular groove are provided with wear-resistant blocks.

Further, the goose-head body and the tank body are integrally cast.

Further, the connection mode between the wear-resistant block and the U-shaped groove and the rectangular groove is embedded.

Further, the wear-resistant block includes an annular shell and a cylindrical interior wrapped therein, and the cylindrical interior protrudes from the end surface of the annular shell.

Furthermore, both the annular shell and the cylindrical interior are wear-resistant alloys.

Further, the tank bottom is provided with a tank bottom guard plate.

Further, the overall shape of the trough is rectangular, and the thickness of the trough is between 1.8-2.1 times that of a traditional chute. The thickness of the tank is increased, doubled from the original thickness, and the bottom of the tank is made of high-temperature resistant steel to ensure that it can operate effectively for a long time in high temperature and gas environments.

Furthermore, the U-shaped groove includes a top U-shaped groove surface and a bottom wear-resistant rib.

Still further, the bottom wear-resistant ribs are composed of several ribs continuously arranged longitudinally along the chute, that is, arranged along the direction of the chute.

Still further, the wear-resistant block is connected to the wear-resistant rib plate through the U-shaped groove surface.

The utility model has the advantages of:

1. The material flow area is transformed from the previous overall U-shaped channel to a U-shaped channel plus a rectangular channel. The thickness of the blanking point is relatively high. With the direction of the material flow, the thickness gradually decreases until the rectangular channel, which reduces the impact of materials. Enhance the service life of the distribution runner.

2. The accident rate of off wind is reduced. The utility model is reformed from various aspects such as integral casting of the goose head body and the trough body, thickening of the trough body, and inlaid wear-resistant blocks on the surface, so as to ensure that the equipment failure is reduced during the production and operation of the distribution chute, so as to reduce the The blast furnace accident shut down.

Description of drawings

Fig. 1 is the isometric view of the blast furnace distribution chute of the present utility model;

Fig. 2 is the front view of the blast furnace distribution chute of the present utility model;

Fig. 3 is the mosaic sectional view of the wear-resistant block of the distribution chute;

Fig. 4 is the mosaic top view of the wear-resistant block of the distribution chute;

Figure 5 is an isometric view of a U-shaped groove;

Fig. 6 is the front view of U-shaped groove;

Fig. 7 is the left view of Fig. 6;

Figure 8 is a top view of Figure 6;

Fig. 9 is a sectional view of the connection between the wear-resistant rib plate of the distributing chute and the surface of the U-shaped groove.

In the figure: goose head body 1, tank body 2, wear-resistant block 3, wear-resistant rib plate 4, U-shaped groove 5, U-shaped groove surface 5.1, rectangular groove 6, connecting bolt 7, tank bottom guard plate 8, ring Shaped shell 9, cylindrical interior 10.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in the figure, a new type of blast furnace distribution chute includes a goose head body 1 and a trough body 2. It is characterized in that: the front section of the trough body 2 is provided with a U-shaped trough 5, and the rear section is a rectangular trough 6. The U-shaped chute One end of the U-shaped groove 5 is high and the other end is low. The lower end of the U-shaped groove 5 is flush with the surface of the rectangular groove 6 . Both the U-shaped groove 5 and the surface of the rectangular groove 6 are provided with wear-resistant blocks 3 .

The material of the tank body 2 is the same as that of the goose head body 1, both are stainless steel, and both are integrally cast. The tank body 2 is rectangular as a whole, and the thickness of the tank body 2 is between 1.8-2.1 times of the thickness of the traditional chute. The bottom of the trough body 2 is provided with a trough bottom guard plate 8, the trough body bottom guard plate 8 is made of high-speed material steel plate casting idiom and the shape of the bottom of the trough body matches, and the connecting bolt 7 is used to connect to ensure that the bottom of the distribution chute is in a high temperature environment. under effective protection. The thickness of the tank is increased, doubled from the original thickness, and the bottom of the tank is made of high-temperature resistant steel to ensure that it can operate effectively for a long time in high temperature and gas environments.

The connection mode between the wear-resistant block 3 and the U-shaped groove 5 and the rectangular groove 6 is inlaid. The wear-resistant block is made of wear-resistant alloy, and the wear-resistant block 3 includes an annular shell 9 and a cylindrical interior 10 wrapped therein, and the cylindrical interior 10 protrudes from the end surface of the annular shell 9 .

The U-shaped groove 5 includes a top U-shaped groove surface 5.1 and a bottom wear-resistant rib plate 4 . Bottom wear-resistant ribs 4 are made of ribs arranged continuously along the axial direction of the chute. The connection between the U-shaped groove surface 5.1 and the rectangular groove directly below the groove surface is integrally cast by the wear-resistant rib plate 4, specifically: the end of the wear-resistant rib plate 4 is welded to the groove body, and the wear-resistant rib plate 4 as a whole is A number of ribs are arranged side by side vertically, and the gap between the ribs and the ribs is repaired with wear-resistant strips or directly poured with molten iron. This method is called integral casting of wear-resistant ribs. The U-shaped groove surface 5.1 is welded with the wear-resistant rib plate 4, and the wear-resistant block 3 passes through the U-shaped groove surface 5.1 and is connected to the wear-resistant rib plate 4, further strengthening the tightness between the U-shaped groove surface and the wear-resistant rib plate.

In summary, the bellless blast furnace material distribution chute provided by the utility model adopts heat-resistant steel through the tank body, the tank body thickness is thickened, and the bottom of the tank body is protected by a heat-resistant steel guard plate, which can resist high temperature and corrosive gas in the furnace Erosion to the outside of the distribution chute; by inlaying wear-resistant blocks on the surface of the chute, it can resist the impact of materials from the top of the furnace and prolong the service life of the distribution chute; by improving the distribution method of the distribution chute, it has changed from the previous U shape to one end higher than the other The low U-shaped and rectangular structure is beneficial to the fabric process and increases the service life of the fabric chute. At the same time, carrying out the above improvement to the distribution chute can also reduce the cost expenditure. details as follows:

Taking a certain ironworks as an example, the ironmaking plant includes two blast furnaces, the price of the originally ordered distribution chute is 750,000 yuan/set, and the price of the improved distribution chute is 605,000 yuan/set. The original distribution chute consumes 4 units per blast furnace per year, and the two blast furnaces consume 8 units per year in total. After the improvement, each blast furnace consumes 2 chute per year, and the two blast furnaces consume 4 chute in total.

75×8-60.5×4=3.58 million.

Therefore, through the improvement of the distribution chute, 3.58 million equipment expenses can be saved every year.

The utility model has the advantages of:

1. The material flow area is transformed from the previous overall U-shaped channel to a U-shaped channel plus a rectangular channel. The thickness of the blanking point is relatively high. With the direction of the material flow, the thickness gradually decreases until the rectangular channel, which reduces the impact of materials. Enhance the service life of the distribution runner.

2. Reduce maintenance cost and facilitate maintenance. Most of the distributing chute is cast or welded, and there are fewer parts, which is convenient for maintenance personnel to operate and maintain. Compared with the old distributing chute, the price of a single piece is lower, so the maintenance cost is greatly reduced compared with the past.

3. The accident rate of off wind is reduced. The utility model is reformed from various aspects such as integral casting of the goose head body and the trough body, thickening of the trough body, and inlaid wear-resistant blocks on the surface, so as to ensure that the equipment failure is reduced during the production and operation of the distribution chute, so as to reduce the The blast furnace accident shut down.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present utility model.

Claims (10)

1. A new type of blast furnace distribution chute, comprising a goose head body (1) and a trough body (2), characterized in that: the front section of the trough body (2) is provided with a U-shaped trough (5), and the rear section is a rectangular trough (6), one end of the U-shaped groove (5) is high and the other end is low, and the low end of the U-shaped groove (5) is flush with the groove surface of the rectangular groove (6), and the U-shaped groove (5) and the rectangular groove (6) The groove surfaces are provided with wear-resistant blocks (3). 2. The novel blast furnace distribution chute according to claim 1, characterized in that: the goose head body (1) and the trough body (2) are integrally cast. 3. The novel blast furnace distribution chute according to claim 1, characterized in that: the wear-resistant block (3) is connected with the U-shaped groove (5) and the rectangular groove (6) by inlaying. 4. The novel blast furnace distribution chute according to claim 1, characterized in that: the wear-resistant block (3) comprises a ring-shaped shell (9) and a cylindrical interior (10) wrapped therein, and the cylindrical interior Decoration (10) protrudes from the end face of the annular casing (9). 5. The novel blast furnace distribution chute according to claim 4, characterized in that: both the annular shell (9) and the cylindrical interior (10) are wear-resistant alloys. 6. The novel blast furnace distribution chute according to claim 1, characterized in that: the overall trough body (2) is rectangular, and the thickness of the trough body (2) is between 1.8-2.1 times that of a traditional chute. 7. The novel blast furnace distribution chute according to claim 6, characterized in that: the U-shaped trough (5) comprises a top U-shaped trough surface (5.1) and a bottom wear-resistant rib (4). 8. The new blast furnace distribution chute according to claim 7, characterized in that: the bottom wear-resistant rib (4) is composed of several ribs arranged continuously along the longitudinal direction of the chute. 9. The new blast furnace distribution chute according to claim 8, characterized in that: the wear-resistant block (3) passes through the U-shaped groove surface (5.1) and is connected to the wear-resistant rib plate (4). 10. The new blast furnace distribution chute according to claim 1, characterized in that: the bottom of the trough (2) is provided with a trough bottom guard (8).