CN215365829U - Novel cooling wall for furnace belly and furnace waist part of blast furnace - Google Patents

Abstract

The utility model discloses a novel cooling wall for a furnace belly and a furnace waist part of a blast furnace, and relates to the technical field of steel blast furnaces. This novel blast furnace bosh furnace waist position stave, including stave, crucible and cooling channel, be equipped with recess and tongue on the stave medial surface, the sunken direction of recess is towards the medial surface, the protruding direction of tongue is opposite with the sunken direction of recess, is equipped with cooling jacket in the cooling channel. This novel blast furnace belly furnace waist position stave through having increased cooling jacket between cooling channel, and cooling jacket adopts double-barrelled sleeve pipe structure, realizes the further cooling to the stave, improves the cooling effect to the stave, slows down the scaling loss of stave, improves the life of whole blast furnace.

Description

Novel cooling wall for furnace belly and furnace waist part of blast furnace

Technical Field

The utility model relates to the technical field of iron and steel blast furnaces, in particular to a novel cooling wall for a furnace belly and a furnace waist part of a blast furnace.

Background

When the blast furnace is used for smelting, the surface temperature of the cooling wall in the blast furnace is up to 1300-1900 ℃ under the action of strong heat, and the cooling wall has strong thermal shock caused by temperature fluctuation, and also has the impact action of high-speed airflow and liquid iron slag, burden pressure and material collapse impact, so that the cooling wall at the waist and belly parts of the blast furnace is seriously abraded. The cooling walls at the furnace waist and the furnace belly are generally filled with refractory materials, but the refractory materials fall off from the furnace when the blast furnace is opened for half a year to one year, and then the cooling walls are continuously burnt.

Chinese patent application No. CN201620592199.6, published as 2017, 1 month, 18 days, which discloses a thin-walled lining of a blast furnace, comprising a furnace bosh, a furnace waist and a furnace shell, wherein the furnace shell comprises a furnace shell upper part, a furnace shell middle part and a furnace shell lower part; the cooling walls at the lower parts of the furnace belly, the furnace waist and the furnace body are inlaid with bricks to build smooth brick linings, and the cooling walls at the upper part of the furnace body and the middle part of the furnace body are built with grooves and clamping groove brick linings with bulges arranged at intervals; the inside of smooth face brick lining with the draw-in groove brick lining is provided with the spraying layer, the hot side on spraying layer is smooth surface. The disadvantages of the patent are that: the preparation is complicated, and the installation and the maintenance are inconvenient, thereby consuming time and labor cost.

Chinese patent application No. CN201621226771.3, published as 2017, 5, and 17, discloses a blast furnace lining structure, which comprises a furnace bosh cooling wall and a tuyere cooling wall, wherein the upper end of the tuyere cooling wall is located on the cold side of the furnace bosh cooling wall and above the lower end of the furnace bosh cooling wall. The upper end of the tuyere cooling wall is arranged to be positioned on the cold surface side of the furnace bosh cooling wall and positioned above the lower end of the furnace bosh cooling wall, namely the tuyere cooling wall and the furnace bosh cooling wall have local staggered amount in the longitudinal direction. The disadvantages of the patent are that: the service life is not long, and the cooling effect is general.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a novel cooling wall at the furnace waist part of a blast furnace, which solves the problems that when a blast furnace is used for smelting, the surface temperature of the cooling wall in the blast furnace is up to 1300-1900 ℃ under the action of strong heating power, and the cooling wall has strong thermal shock caused by temperature fluctuation, and also has the impact action of high-speed airflow and liquid iron slag, the pressure of furnace burden and the impact of material collapse, so that the cooling wall at the furnace waist part and the furnace waist part of the blast furnace is seriously abraded. The cooling walls at the furnace waist and the furnace belly are generally filled with refractory materials, but the refractory materials fall off from the furnace when the blast furnace is opened for half a year to one year, and then the cooling walls are continuously burnt.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme: a novel cooling wall for the furnace waist part of a blast furnace belly comprises a cooling wall, a furnace hearth and a cooling channel, wherein a groove and a convex groove are formed in the inner side surface of the cooling wall, the concave direction of the groove faces towards the inner side surface, the convex direction of the convex groove is opposite to the concave direction of the groove, a cooling sleeve is arranged in the cooling channel, a water inlet end and a water outlet end are arranged on the cooling sleeve, the water inlet end of the cooling sleeve is used for water inlet and outlet, the water outlet end extends into the convex groove in the cooling wall, and a sealing cap is arranged at the end part of the cooling sleeve extending into the convex groove;

the cooling sleeve comprises an outer pipe, a hollow inner pipe is arranged in the outer pipe, one end of the outer pipe is arranged in the convex groove, a sealing cap is arranged at the end part of the outer pipe, a gap is reserved between the inner pipe and the convex groove, one end of the inner pipe is used for water inlet, a circular seam between the inner pipe and the outer pipe is used for water outlet, the inner pipe is made of copper, and the inner pipe is fixed in the outer pipe through a plurality of fixing frames;

the inner part of the groove is filled with ramming materials;

the furnace hearth is provided with an air inlet, the air inlet comprises a large tuyere sleeve connected with the furnace hearth, a middle tuyere sleeve is sleeved in the large tuyere sleeve, a small tuyere sleeve is sleeved in the middle tuyere sleeve, and the small tuyere sleeve penetrates through the cooling wall and extends into the blast furnace to enable the angle of the equivalent furnace belly angle to be 70-73 degrees.

(III) advantageous effects

The utility model provides a novel cooling wall for a furnace waist part of a blast furnace belly. The method has the following beneficial effects: this novel blast furnace belly furnace waist position stave through having increased cooling jacket between cooling channel, and cooling jacket adopts double-barrelled sleeve pipe structure, realizes the further cooling to the stave, improves the cooling effect to the stave, slows down the scaling loss of stave, improves the life of whole blast furnace.

Drawings

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

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the structure of a cooling wall at the bosh and the waist of a blast furnace.

In the figure: 1. a furnace body; 2. a furnace waist; 3. a furnace belly; 4. a hearth; 5. a stave; 6. a refractory material; 7. a tuyere small sleeve; 8. a red copper cooling wall body; 9. a sealing cap; 10. a convex groove; 11. a groove; 12. a water inlet end; 13. a water outlet end; 14. and cooling the sleeve.

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: a novel cooling wall for the furnace waist part of a blast furnace belly comprises a cooling wall 5, a furnace hearth 4 and a cooling channel, wherein a groove 11 and a convex groove 10 are arranged on the inner side surface of the cooling wall 5, the concave direction of the groove 11 faces the inner side surface, the convex direction of the convex groove 10 is opposite to the concave direction of the groove 11, a cooling sleeve 14 is arranged in the cooling channel, a water inlet end 12 and a water outlet end 13 are arranged on the cooling sleeve 14, the water inlet end 12 of the cooling sleeve 14 is used for water inlet and outlet, the water outlet end 13 extends into the convex groove 10 in the cooling wall 5, and a sealing cap 9 is arranged at the end part of the cooling sleeve 14 extending into the convex groove 10;

the cooling sleeve 14 comprises an outer pipe, a hollow inner pipe is arranged in the outer pipe, one end of the outer pipe is arranged in the convex groove 10, a sealing cap 9 is arranged at the end part of the outer pipe, a gap is reserved between the inner pipe and the convex groove 10, one end of the inner pipe is used for water inlet, a circular seam between the inner pipe and the outer pipe is used for water outlet, the inner pipe is made of copper, and the inner pipe is fixed in the outer pipe through a plurality of fixing frames;

the inside of the groove 11 is filled with ramming materials;

the furnace hearth 4 is provided with an air inlet, the air inlet comprises a large tuyere sleeve connected with the furnace hearth 4, a middle tuyere sleeve is sleeved in the large tuyere sleeve, a small tuyere sleeve 7 is sleeved in the middle tuyere sleeve, and the small tuyere sleeve 7 penetrates through the cooling wall 5 and extends into the blast furnace to enable the angle of the equivalent furnace belly angle to be 70-73 degrees.

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

(1) according to the utility model, the cooling sleeve is additionally arranged between the cooling channels of the original blast furnace cooling wall, the cooling sleeve adopts a double-pipe sleeve structure, cooling high-pressure water enters through one end of the inner pipe in the cooling sleeve, water is discharged from the gap between the other end of the inner pipe and the convex groove, and finally water is discharged from the annular seam between the inner pipe and the outer pipe, so that the cooling wall is further cooled, the cooling effect on the cooling wall is improved, the integral damage and burning loss of the cooling wall are reduced, and the service life of the whole blast furnace is prolonged;

(2) according to the utility model, the inner pipe is arranged in the outer pipe, both ends of the inner pipe and the outer pipe are open, water is fed through one end of the inner pipe, water is discharged from one end of the inner pipe, water flow at the water outlet end of the inner pipe flows to one end of the outer pipe, which is far away from the convex groove, from a gap between the inner pipe and the outer pipe, so that water is discharged, one end of the outer pipe, which is close to the convex groove, is sealed by the sealing cap, so that the water flow from the inner pipe is prevented from flowing out of the cooling sleeve, the sealing performance of the water flow is ensured, a gap is reserved between the inner pipe and the convex groove, the water flow can smoothly flow into the gap between the inner pipe and the outer pipe, and the water drainage step is completed;

(3) according to the utility model, the SiC ramming mass is filled in the groove, and the ramming mass has high fire resistance and high temperature resistance, so that the overall high temperature resistance of the cooling wall is effectively improved, the cooling wall is prevented from being easily damaged in a long-term high-temperature working environment of a blast furnace, the abrasion of the cooling wall is slowed down, and the maintenance cost is reduced; the inner pipe and the outer pipe are made of copper and have high wear resistance, and the inner pipe is fixed in the outer pipe through a plurality of fixing frames, so that the connection stability between the inner pipe and the outer pipe is ensured, and the replacement is convenient;

(4) according to the utility model, the air inlet is arranged on the hearth, the air inlet is arranged in a composite mode, the tuyere small sleeve is sleeved with the tuyere middle sleeve, the tuyere large sleeve is sleeved outside the tuyere middle sleeve, the tuyere small sleeve extends into the blast furnace to ensure that the angle of the equivalent furnace belly angle in the blast furnace is maintained at 70-73 degrees, the equivalent furnace belly angle is changed by lengthening the length of the tuyere small sleeve extending into the cooling wall, the central air flow in the blast furnace is promoted, the air flow coming out of a tuyere convolution area keeps a certain distance with the furnace belly, the average flow velocity of the gas at the edge of the furnace belly is reduced, the edge air flow is inhibited, and the burning loss of the cooling wall is effectively reduced.

Example 1

As shown in fig. 1, 2, and 3, the following description is made here: the blast furnace is divided into a furnace throat, a furnace body 1, a furnace waist 2, a furnace belly 3 and a furnace hearth 4 from top to bottom in sequence, and blast furnace linings corresponding to the furnace waist 2 and the furnace belly 3 are particularly easy to wear in a high-temperature environment when the blast furnace is smelted. The blast furnace bosh and bosh cooling wall of the utility model is particularly applied to the inner wall of the blast furnace corresponding to the positions of the bosh 2 and the bosh 3. The concrete structure is as follows:

the utility model provides a novel blast furnace belly furnace waist position stave, is including setting up stave 5 in blast furnace inside, and stave 5 is red copper stave body 8, and the material of stave 5 is red copper promptly, has higher wearability. A plurality of cooling channels are arranged between the cooling wall 5 and the blast furnace. Specifically, the cooling channel comprises a water inlet end 12 and a water outlet end 13 which are arranged on the blast furnace, the water outlet end 13 is arranged above the water inlet end 12, and a flow pipe is arranged in the cooling wall 5, one end of the flow pipe is communicated with the water inlet end 12, the other end of the flow pipe is communicated with the water outlet end 13, a cooling effect is achieved on the cooling wall 5 through the flow of water flow in the flow pipe, the water in the general cooling channel is medium-pressure water, namely the water pressure is more than or equal to 0.5Mpa, and the water speed is 2-2.5 m/s. The cooling wall 5 comprises an inner side surface which is contacted with the substances in the blast furnace, namely the heating surface of the cooling wall 5 in the blast furnace is the inner side surface, and the cooling wall 5 is the outer side surface which is connected with the inner wall of the blast furnace. Be equipped with recess 11 and tongue 10 on the medial surface, the sunken orientation of recess 11 is towards the medial surface, and the protruding direction of tongue 10 is opposite with the sunken orientation of recess 11, and is concrete, on the medial surface of stave 5, and recess 11 sets up with tongue 10 interval, is equipped with tongue 10 between two adjacent recesses 11 promptly, and recess 11 is sunken to being close to blast furnace inner wall one side, and tongue 10 is protruding to keeping away from blast furnace inner wall one side. A cooling sleeve 14 is arranged in the cooling channel, one end of the cooling sleeve 14 is used for water inlet and outlet, the other end of the cooling sleeve 14 extends into the convex groove 10 in the cooling wall 5, and a sealing cap 9 is arranged at the end part of the cooling sleeve 14 extending into the convex groove 10. Both ends of the cooling sleeve 14 are open, one end of the cooling sleeve is used for water inlet and outlet, the other end of the cooling sleeve is sealed by the sealing cap 9, water flow can be guaranteed to flow out of the water inlet end of the cooling sleeve 14 normally, and certain potential safety hazards caused by the water flow to the external environment are avoided. Preferably, the material of the sealing cap 9 is red copper, so that the sealing cap has good wear resistance, and the service life of the sealing cap 9 is prolonged while the sealing performance is ensured. And furthermore, the SiC ramming mass is filled in the groove 11, and the ramming mass has higher fire resistance and high temperature resistance, so that the overall high temperature resistance of the cooling wall 5 is effectively improved, the cooling wall 5 is prevented from being easily damaged in a long-term high-temperature working environment of the blast furnace, the abrasion of the cooling wall 5 is reduced, and the maintenance cost is reduced.

According to the utility model, the cooling sleeve 14 is additionally arranged in the original cooling channel of the blast furnace, and high-pressure water is injected into one end of the cooling sleeve 14, so that the pressure of the water is more than or equal to 1.6Mpa, and the water speed is more than or equal to 3 m/s. The water flows in the cooling sleeve 14 to further cool the cooling wall 5, and because the water outlet of the cooling sleeve 14 is placed at one end of the convex groove 10 in a sealed state, water flows out from one end of the water inlet due to pressure difference, so that the arrangement of parts is saved, and the whole structure is simple. 9 cooling sleeves are arranged on a single cooling wall, and the 9 cooling sleeves and the convex groove 10 at the front end form 9 single-point micro coolers. The arrangement of the cooling sleeve 14 improves the cooling efficiency of the cooling wall 5 on one hand, and the cooling of the whole inner wall of the blast furnace is enhanced by adopting a structure of double cooling of the cooling sleeve 14 and a cooling channel; on the other hand, the problem of high-temperature burning loss of the cooling wall 5 is solved, so that the maintenance cost is saved, and the service life of the cooling wall 5 is prolonged. The whole structure is simple, the manufacturing cost is low and the effect is good.

Specifically, in this embodiment, the cooling jacket 14 includes an outer tube, and a hollow inner tube is disposed inside the outer tube. Specifically, the inner tube is made of copper, so that the inner tube has high wear resistance. And the inner tube is fixed in the outer tube through a plurality of mount for connect firmly between the interior outer tube, the steadiness of connecting between whole interior outer tube can not be influenced in the damage of single mount simultaneously, only need change easy maintenance to the mount of single damage. One end of the outer pipe is arranged in the convex groove 10, and the end part of the outer pipe at the end is provided with a sealing cap 9; a gap is arranged between the inner pipe and the convex groove 10, one end of the inner pipe is used for water inflow, and the gap between the inner pipe and the outer pipe is a water outflow channel. That is, the length of the inner tube is less than that of the outer tube, the water inlet end of the inner tube is flush with the end of the outer tube far away from the convex groove 10, a gap of a water outlet area is formed between the inner tube and the convex groove 10, water enters from one end of the inner tube and flows out from the other end to the water outlet area, and the water flows from the gap of the inner tube and the outer tube to the end of the outer tube far away from the convex groove 10 under the reason of pressure difference in the water outlet area to finish water outlet. The whole cooling sleeve 14 is simple in structure, stable in operation and low in cost.

Example 2

Basically, like embodiment 1, in order to further reduce the wear of the cooling wall 5, in this embodiment, an air inlet is provided on the hearth 4 of the blast furnace, the air inlet includes a tuyere large sleeve connected to the hearth 4, a tuyere medium sleeve is sleeved in the tuyere large sleeve, a tuyere small sleeve 7 is sleeved in the tuyere medium sleeve, and the tuyere small sleeve 7 penetrates through the cooling wall 5 and extends into the blast furnace so that the angle of the equivalent furnace belly angle in the blast furnace is 70-73 °. In the present embodiment, the air inlet is configured as a composite structure, and the length of the air inlet small sleeve 7 penetrating through the cooling wall 5 into the blast furnace changes the size of the equivalent furnace belly angle, which is defined as follows in the present embodiment: the furnace belly angle alpha 1 refers to an included angle between a bending point of an inner shape of the furnace hearth 4 and a horizontal line in the furnace belly 3, and the equivalent furnace belly angle alpha 2 refers to an included angle between the front end of the central line of the tuyere small sleeve 7 and the horizontal line in the furnace belly 3. The equivalent furnace belly angle is smaller along with the longer length of the tuyere small sleeve 7 extending into the blast furnace, so that the equivalent furnace belly angle is changed to be within the range of 70-73 degrees by controlling the tuyere small sleeve 7. Therefore, the central airflow in the blast furnace can be promoted, the airflow coming out of the tuyere raceway keeps a certain distance from the furnace bosh 3, the average flow speed of the gas at the edge of the furnace bosh 3 is reduced, the edge airflow is inhibited, and the burning loss of the cooling wall 5 is effectively reduced. Meanwhile, the inner side surface of the cooling wall 5 is coated with the refractory material 6, so that the high-temperature resistance of the cooling wall 5 is further enhanced, and the service life of the cooling wall 5 is further prolonged.

To sum up, this novel blast furnace bosh furnace waist position stave through having increased cooling jacket between cooling channel, cooling jacket adopts double-barrelled sleeve pipe structure, realizes the further cooling to the stave, improves the cooling effect to the stave, slows down the scaling loss of stave, improves the life of whole blast furnace.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. The utility model provides a novel blast furnace abdomen furnace waist position stave, includes stave (5), crucible (4) and cooling channel, its characterized in that: a groove (11) and a convex groove (10) are formed in the inner side face of the cooling wall (5), the concave direction of the groove (11) faces the inner side face, the convex direction of the convex groove (10) is opposite to the concave direction of the groove (11), a cooling sleeve (14) is arranged in the cooling channel, a water inlet end (12) and a water outlet end (13) are arranged on the cooling sleeve (14), the water inlet end (12) of the cooling sleeve (14) is used for water inlet and outlet, the water outlet end (13) extends into the convex groove (10) in the cooling wall (5), and a sealing cap (9) is arranged at the end part of the cooling sleeve (14) extending into the convex groove (10);

the cooling sleeve (14) comprises an outer pipe, a hollow inner pipe is arranged in the outer pipe, one end of the outer pipe is arranged in the convex groove (10), a sealing cap (9) is arranged at the end part of the outer pipe, a gap is reserved between the inner pipe and the convex groove (10), one end of the inner pipe is used for water inlet, a circular seam between the inner pipe and the outer pipe is used for water outlet, the inner pipe is made of copper, and the inner pipe is fixed in the outer pipe through a plurality of fixing frames;

the inside of the groove (11) is filled with ramming materials;

the furnace hearth (4) is provided with an air inlet, the air inlet comprises a large tuyere sleeve connected with the furnace hearth (4), a middle tuyere sleeve is sleeved in the large tuyere sleeve, a small tuyere sleeve (7) is sleeved in the middle tuyere sleeve, and the small tuyere sleeve (7) penetrates through the cooling wall (5) and extends into the blast furnace to enable the angle of the equivalent furnace belly angle to be 70-73 degrees.

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