CN217922166U - Blast furnace with wear-resistant furnace belly - Google Patents

Abstract

The utility model provides a blast furnace with wear-resistant furnace bosh, include: the blast furnace shell is arranged on a middle sleeve of the blast furnace and extends out of the blast furnace along the direction of the middle sleeve; one side of the cooling wall is fixedly arranged on the inner wall of the blast furnace shell, and the other side of the cooling wall is provided with an embedded groove; and the wear-resistant material is embedded in the embedding groove in the cooling wall, and the thickness of the wear-resistant material ranges from 700mm to 900mm. This cooling device at blast furnace bosh position sets up certain inclination through with the blast furnace stove outer covering, makes the stave outwards remove along the structure of blast furnace stove outer covering to the thickness that makes the wear-resisting material who sets up outside the stave can increase, in order to reach the purpose of protection blast furnace, thereby prolongs the life of blast furnace.

Description

Blast furnace with wear-resistant furnace belly

Technical Field

The utility model relates to a metallurgical industry technical field, more specifically relates to a blast furnace that bosh position is wear-resisting.

Background

The service life of the blast furnace is long, so in order to adapt to the service life of the blast furnace, the cooling equipment of the blast furnace needs to be improved and improved continuously. The heat conductivity of the blast furnace is divided from weak to strong in material, and is respectively cast iron, cast steel and copper. The blast furnace comprises the following structural forms: a cooling wall, a cooling plate, and a mixed form of the cooling wall and the plate.

The cooling of the blast furnace bosh part is subject to the abrasion of a hot high temperature and a convolution region, the hot temperature reaches over 2200 ℃, high temperature air and coke (including coal powder) form the convolution region which runs at high speed, the high temperature air blows the coke at the speed of about 200m/s to rapidly rotate and complete oxidation (combustion) reaction, the generated high temperature and high pressure coal gas and the descending coke and liquid iron slag move oppositely, the movement speed of the coke and air flow in the region is fastest, namely, the furnace wall of the region needs to bear the abrasion of the convolution coke and the erosion of the liquid iron slag, and the abrasion of the convolution region is very serious.

Because the supporting condition of the furnace belly is poor, after local ablation or mechanical abrasion of a convolution area, refractory materials are easy to fall off, the service life of the blast furnace is shortened, and the high-strength smelting requirement of the modern blast furnace cannot be completely met.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a blast furnace with a wear-resistant furnace belly, which overcomes the disadvantages of the prior art, and thus provides a novel cooling device for a blast furnace belly capable of meeting the production requirements of a blast furnace.

The utility model provides a blast furnace that furnace bosh position is wear-resisting, include:

the blast furnace shell is arranged on a middle sleeve of the blast furnace and extends out of the blast furnace along the direction of the middle sleeve;

one side of the cooling wall is fixedly arranged on the inner wall of the blast furnace shell, and the other side of the cooling wall is provided with an embedded groove;

and the wear-resistant material is embedded in the embedding groove, and the thickness of the wear-resistant material ranges from 700mm to 900mm.

In addition, the preferred structure is that the wear-resistant material is brickwork.

In addition, the preferable structure is that a cooling pipe is arranged inside the cooling wall, and a water outlet of the cooling pipe is arranged on the outer wall of the blast furnace shell.

Preferably, the insert groove has a structure in which convexes and concaves are alternated.

In addition, the thickness of the wear-resistant material is preferably gradually reduced from the middle of the furnace bosh to the top.

Further, it is preferable that the belly angle of the blast furnace is in the range of 70 ° to 76 °.

From the above description, the utility model provides a wear-resisting blast furnace in furnace belly position through outwards extending the blast furnace stove outer covering, increases wear-resisting material's thickness, makes the furnace belly position more wear-resisting, simultaneously, sets up certain inclination with the furnace belly angle, is favorable to the smooth and easy group of furnace belly coal gas to rise more to reduce the impact of furnace belly thermal current, in order to reach the purpose of protection blast furnace, thereby prolong the life of blast furnace.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings.

In the drawings:

fig. 1 is a schematic view of a blast furnace with a wear-resistant furnace belly according to an embodiment of the present invention.

Description of the reference numerals:

1. a blast furnace shell; 2. a stave; 3. a wear resistant material; 4. a middle sleeve; 5. and (7) cooling the tube.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings. The exemplary embodiments, however, may be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. In the present disclosure, the terms "include", "arrange", "disposed" and "disposed" are used to mean open-ended inclusion, and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not limiting as to the number or order of their objects; the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Fig. 1 is a schematic view of a blast furnace with a wear-resistant furnace belly according to an embodiment of the present invention.

As shown in figure 1, the blast furnace with the wear-resistant furnace belly part of the utility model comprises a blast furnace shell 1, a cooling wall 2 and a wear-resistant material 3.

The blast furnace shell 1 is arranged on a middle sleeve 4 of the blast furnace and extends out of the blast furnace along the direction of the middle sleeve 4, so that the thickness of a wear-resistant material arranged in the blast furnace shell 1 is increased, one side of a cooling wall 2 is fixedly arranged on the inner wall of the blast furnace shell 1, the other side of the cooling wall 2 is provided with an embedding groove, a wear-resistant material 3 is embedded in the embedding groove, and the thickness range of the wear-resistant material 3 is 700-900 mm. The effective combination of the cooling wall 2 and the wear-resistant material 3 effectively protects the tuyere medium sleeve 4, thereby prolonging the service life of the blast furnace.

In the blast furnace with the wear-resistant furnace belly, the furnace belly angle of the blast furnace ranges from 70 degrees to 76 degrees, and the optimal value of the furnace belly angle ranges from 72 degrees to 73 degrees. In the prior art, the furnace belly angle is between 80 degrees and 85 degrees, the furnace belly angle in the embodiment is set to 72 degrees, and the reasonable furnace belly angle is set to be more favorable for smooth discharging and rising of furnace belly coal gas, so that the heat flow impact of the furnace belly is reduced, and the stable protective slag crust is formed in the furnace belly area to protect the cooling wall to work for a long time.

The utility model discloses a blast furnace that bosh position is wear-resisting, one side that blast furnace stove outer covering 1 was kept away from to stave 2 is provided with the unsmooth alternate structure of multiunit and inlays the groove, and wear-resisting material 3 inlays to be established inlaying the inslot for it is more firm to connect.

The utility model discloses a blast furnace that furnace belly position is wear-resisting is provided with cooling tube 5 in stave 2, and the export setting of cooling tube 5 is on blast furnace stove outer wall 1, when using, takes away the heat at furnace belly position through cooling tube 5, and the overheated ageing that the protection blast furnace belly produced because the high temperature to prolong the life of blast furnace.

Specifically, the wear-resistant material 3 is brickwork, can be built according to the overall shape of the cooling wall 2, and has strong applicability. In this embodiment, the wear-resistant material 3 is 800mm thick, and the wear-resistant material 3 is used for conducting heat at the bosh of the blast furnace and protecting the cooling stave 2, so that the heat is taken away by cooling water in a pipeline arranged in the cooling stave 2, thereby achieving the purpose of protecting the cooling stave 2.

In the prior art, the thickness of the wear-resistant material 3 ranges from 250mm to 300mm. Through practical verification, the wear-resistant material 3 in the blast furnace has the loss of about 200mm in one year, the thickness of the wear-resistant material 3 is kept in a range of 50mm-100mm, and because the thickness of the rest wear-resistant material 3 is thinner, a large amount of heat is directly conducted into the cooling wall 2, and when cooling water cannot take away the heat in time, the heat which cannot be conducted can be remained, and the cooling wall 2 is aged and damaged.

The utility model discloses a blast furnace that the furnace bosh position is wear-resisting, wear-resisting material 3's thickness is steadilyd decrease to the top by the furnace bosh middle part gradually, makes wear-resisting material 3 hang the sediment more easily, and finally, wear-resisting material 3 reaches a balanced thickness, and when using, the damage of hanging sediment and wear-resisting material 3 on the wear-resisting material 3 forms dynamic balance, reaches the purpose that prolongs the life of blast furnace.

In the actual use process, after the wear-resistant material 3 in the embodiment is used for one year, the thickness of the wear-resistant material 3 is remained between 500mm and 600mm, and the remained thickness can effectively protect the cooling wall 2 and prolong the heat conduction time. In addition, the phenomena of slag adhering and the like are easily generated on the wear-resistant material 3 in the using process of the blast furnace, so that the thickness of the wear-resistant material forms a dynamic balance between loss and slag adhering and is stabilized within a range. Meanwhile, the thickness of the wear-resistant material 3 can also protect the middle sleeve 4, so that the impact of furnace burden on the tuyere middle sleeve is reduced, and the service life of the blast furnace is prolonged.

Compared with the prior art, the angle of the blast furnace shell 1 at the outermost side is expanded outwards, so that the cooling wall 2 fixed on the blast furnace shell 1 moves outwards synchronously, and the width of the inlaid bricks of the cooling wall is increased to about 800mm from the conventional width of about 250 mm. The problem of mechanical abrasion of the convolution area to the wear-resistant material 3 is effectively solved, and the effective combination of the cooling wall at the furnace bosh part of the blast furnace and the brick-inlaid refractory material can be still ensured under the condition that the mechanical abrasion causes the damage of the refractory material of about 200mm, so that the falling of the rest refractory material is prevented. In addition, the wear-resistant material 3 in this embodiment is easy to stick slag, and forms a stable inner shape of the furnace bosh.

According to the above description and the embodiment, the utility model provides a wear-resisting blast furnace in furnace bosh position, moreover, the steam generator is simple in structure, overcome the mechanical wear that the district of circling round brought, the cooling effect of stave is good, and not fragile, be present blast furnace bosh position ideal and practical cooling device, through outwards extending the horizontal direction with the blast furnace stove outer covering along well cover, increase the thickness that wear-resisting material set up, set up certain inclination with the furnace bosh angle, be favorable to smoothly sending of furnace bosh coal gas to rise more, thereby reduce the impact of furnace bosh thermal current, and simultaneously, still reduced the impact of furnace charge to cover in the wind gap, the effect of cover in the protection wind gap has been played, the life-span of effectual extension blast furnace has brought more economic benefits.

The blast furnace according to the present invention, in which the hearth portion is wear-resistant, is described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the blast furnace with the wear-resistant furnace belly without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.

Claims (6)

1. A blast furnace with wear-resistant furnace bosh part is characterized by comprising:

the blast furnace shell is arranged on a middle sleeve of the blast furnace and extends out of the blast furnace along the direction of the middle sleeve;

one side of the cooling wall is fixedly arranged on the inner wall of the blast furnace shell, and the other side of the cooling wall is provided with an embedding groove;

and the wear-resistant material is embedded in the embedding groove, and the thickness of the wear-resistant material ranges from 700mm to 900mm.

2. The blast furnace with wear-resistant hearth according to claim 1,

the wear-resistant material is brickwork.

3. The blast furnace with wear-resistant bosh section according to claim 1,

and a cooling pipe is arranged in the cooling wall, and a water outlet of the cooling pipe is arranged on the outer wall of the blast furnace shell.

4. The blast furnace with wear-resistant hearth according to claim 1,

the embedding grooves are of a concave-convex alternate structure.

5. The blast furnace with wear-resistant bosh section according to claim 1,

the thickness of the wear-resistant material is gradually reduced from the middle part of the furnace bosh to the top.

6. The blast furnace with wear-resistant bosh section according to claim 1,

the range of the furnace belly angle of the blast furnace is 70-76 degrees.

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