CN116162753A

CN116162753A - Method for mounting cooling wall in tuyere zone of blast furnace

Info

Publication number: CN116162753A
Application number: CN202211552581.0A
Authority: CN
Inventors: 王宏伟; 王平; 张真春; 全加云
Original assignee: Pangang Group Engineering Technology Co Ltd
Current assignee: Pangang Group Engineering Technology Co Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-05-26

Abstract

The invention relates to the technical field of blast furnace tuyere cooling wall installation, and particularly discloses a blast furnace tuyere zone cooling wall installation method, wherein a supporting piece is installed through a cavity opening of a tuyere large sleeve and is used for supporting operation of operators; lifting the cooling wall to the upper part of the supporting piece through a square manhole of the furnace roof, and installing the cooling wall; removing the support; the installation method is simpler to operate and can reduce the installation cost.

Description

Method for mounting cooling wall in tuyere zone of blast furnace

Technical Field

The invention relates to the technical field of blast furnace tuyere cooling wall installation, in particular to a blast furnace tuyere zone cooling wall installation method.

Background

In new construction of blast furnaces and overhaul engineering of blast furnaces in iron and steel enterprises, the cooling wall must be installed to form a safe and reliable working surface, and as the refractory bricks or the cooling wall are fully distributed on the furnace shell in the furnace, welding operation cannot be performed, so that the manufacturing of a platform is affected. The cooling wall is installed and replaced and is constructed by adopting a furnace mouth upper ring crane, and the traditional cooling wall replacement mode is as follows: the method comprises the steps of opening a tap hole gate, conveying a hanging scaffold spare part from the gate, assembling and lifting the hanging scaffold spare part in a furnace, and installing a cooling wall by utilizing the hanging scaffold in the furnace, wherein generally, more residues in the furnace need to enter a digger assembly from the furnace top, the digger is assembled in the furnace, and the residues in a furnace hearth are dug in a mechanical mode, so that the tap hole gate is not opened in the operation, and the hanging scaffold spare part is inconvenient to assemble in the furnace. The blast furnace cooling wall replacing equipment comprises a telescopic arm, a middle box body, an outer box body, a middle column, a diagonal brace, a motor, a hydraulic cylinder, a pedestal, an operating platform, a hydraulic inlet, a hydraulic outlet, an inner hydraulic cylinder, a supporting plate and a disc base,

the method is complex in operation, the equipment is required to be assembled in the furnace, slag in the furnace is cleaned up in a large range, some electric wires and hydraulic pipeline equipment are required to be introduced, meanwhile, other parts are installed in the center column by using the ring crane at the upper part of the furnace mouth, the equipment is controlled to be installed at the bottom of the furnace, and the safety risk is high.

Patent literature (chinese patent publication No. CN 102912051B) discloses a method for replacing a blast furnace tap hole cooling wall on line, which is mainly to replace the blast furnace tap hole cooling wall by integrally digging a tap hole frame, a furnace shell and a cooling wall at the tap hole part, and then assembling the tap hole frame, the furnace shell and the cooling wall into a whole again, and integrally replacing the tap hole frame, the furnace shell and the cooling wall from the outside of the furnace shell of the blast furnace. The number of parts to be replaced at one time is large, and the damage degree to the blast furnace iron notch is large.

The method comprises the steps of installing a cooling wall by adopting a hanging scaffold in a furnace, opening a large iron hole door, transporting a hanging scaffold assembly from the large iron hole door into the furnace, assembling and lifting the hanging scaffold in the furnace, and replacing the cooling wall.

The cooling wall is installed in a mode of setting up a scaffold in the furnace, the scaffold is set up to be higher due to uneven ground in the furnace, the stability of the scaffold is poor, the safety of operators is influenced, the horizontal operation of the lifting cooling wall to the furnace shell direction is influenced by the cross bars of the scaffold, the scaffold is easy to be broken by collision, the scaffold is easy to loosen and collapse, and the potential safety hazard is large.

Therefore, a method needs to be studied to avoid opening the tap hole gate, install the cooling wall without using a hanging scaffold in the furnace, and complete the installation of the cooling wall in the tuyere zone in the furnace.

Disclosure of Invention

The invention aims to provide a method for installing a cooling wall of a blast furnace tuyere zone, which is simple to operate and can reduce the installation cost.

The aim of the invention can be achieved by the following technical scheme:

a blast furnace tuyere zone cooling wall mounting method comprises the following steps:

a supporting piece is arranged through a cavity opening of the tuyere large sleeve and is used for supporting operation of operators;

lifting the cooling wall to the upper part of the supporting piece through a square manhole of the furnace roof, and installing the cooling wall;

and (5) removing the support.

In a further scheme, the support piece comprises a cantilever, a springboard, a stand column, a longitudinal beam, a cross beam and an inclined strut, one end of the cantilever is positioned outside the cavity opening of the tuyere large sleeve and is connected to the furnace shell through the inclined strut, and the other end of the cantilever penetrates through the cavity opening of the tuyere large sleeve to form a springboard with the cross beam, the stand column, the longitudinal beam and the springboard.

In a further aspect, the support further comprises a safety rope for binding protection of the operator.

In a further aspect, the support is a detachable piece.

In a further aspect, the steps further include: when the cooling wall is installed, the cooling wall is covered with a sheath.

In a further aspect, the steps further include: grouting is carried out between the cooling wall and the carbon bricks provided with the cooling wall, and the grouting material is silicon carbide pressing material.

In a further development, the installation site on the furnace wall for installing the stave is cleaned before the support is installed.

In a further aspect, the cleaning method includes the following steps:

ejecting the cooling wall from the outside of the furnace through an oil press;

and a slider is arranged through a winch, and the ejected cooling wall is lifted out of the square manhole at the top of the furnace.

In a further aspect, the cleaning method further includes the following steps: and (3) hanging the digging machine assembly into a square manhole at the furnace top, assembling the digging machine in the furnace, and cleaning residues in the furnace.

In a further aspect, the digger cleans slag from the top to the bottom wall.

The invention has the beneficial effects that:

1. according to the invention, the supporting piece is arranged from the cavity opening of the tuyere large sleeve and is used for supporting an operator to operate, the cooling wall is hoisted to the position above the supporting piece through the square manhole on the furnace top, the cooling wall is arranged, the operation is simple, the existing iron notch gate is not required to be dismantled, the problem of assembly and operation safety of some mounting pieces on the hanging scaffold during installation through the hanging scaffold is not required to be considered, the installation cost is greatly reduced, and in addition, a better support can be provided mainly through the preset supporting piece, the support is stable, the safety of the operator is improved, and the safety specification of construction operation is more met.

2. The invention can be temporarily built during temporary maintenance, new installation and slag removal of the furnace body, and has convenient operation, low modification cost and small damage degree to the furnace body.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block flow diagram of a method for installing a cooling wall in a tuyere zone of a blast furnace according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of a stave suspended in a furnace body by ropes via a crane and pulley assembly through a square manhole of a blast furnace in an embodiment of the present invention;

FIG. 3 is a schematic view of the installation of a support member in an embodiment of the invention;

FIG. 4 is a schematic cross-sectional view at A-A of FIG. 3;

fig. 5 is a schematic view of the connection of a raised support in an embodiment of the invention.

In the figure: 0. a blast furnace; 1. a tuyere large sleeve; 2. a support; 21. a cantilever; 22. a springboard; 23. a column; 24. a longitudinal beam; 25. a cross beam; 26. diagonal bracing; 27. cantilever beam; 28. a support column; 3. a square manhole; 4. a cooling wall; 5. a pulley assembly; 6. and (5) a crane.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 2, a simplified diagram is shown of the stave 4 being hoisted into the furnace body by ropes through a square manhole 3 of the blast furnace 0 by means of a crane 6 and a pulley assembly 5. As shown in fig. 3, a simplified diagram of the mounting of the support 2 at the mouth of the tuyere large sleeve 1 is shown. As shown in fig. 4, the support 2 includes a cantilever 21, a springboard 22, a column 23, a longitudinal beam 24, a cross beam 25 and a diagonal brace 26, one end of the cantilever 21 is located outside the cavity opening of the tuyere large sleeve 1 and is connected to the furnace shell through the diagonal brace 26, and the other end passes through the cavity opening of the tuyere large sleeve to form a springboard with the cross beam, the column, the longitudinal beam and the springboard. The diagonal braces 26 can also be arranged on the cantilever beams 27 and then connected with the cantilever beams 21 through the cantilever beams 27, or the diagonal braces 26 can be directly connected with the cantilever beams 21, and the cantilever beams 21 are connected through the cantilever beams 27.

Referring to fig. 1-5, when the furnace hearth is dug in the blast furnace 0, if the cooling wall 4 is damaged, the cooling wall 4 needs to be replaced, firstly, during the period of dug the furnace hearth, the cooling wall 4 needs to be inserted and removed, a proper oil press is used for cooling the wall from the outside of the furnace, the oil press with tonnage of about 100 tons is generally preferred, the cooling wall falls to the ground in the furnace, a slider is arranged by a winch, and the cooling wall is lifted out from the furnace top and is carried away by a crane at the furnace top.

Next, the section steel is extended into the furnace from the tuyere large sleeve 1 below the cooling wall 4 by utilizing the tuyere large sleeve 1, the outside is connected to the furnace shell through an inclined support plate and a cantilever beam 27 to form a support point of an operation platform, a cantilever beam 21 and an inclined support 26, and a detachable jump stand with a structure of a cross beam 25, a stand column 23, a longitudinal beam 24 and a springboard 22 is made by adopting channel steel and bolts according to requirements as the operation platform for installing the cooling wall 4. When the operation platform is manufactured, the person skilled in the art should think that other high-strength steel materials or structures can be used for manufacturing the supporting piece 2 which can be supported in the tuyere large sleeve 1 and is used for supporting an operator to install the cooling wall, for example, the hanging beam 21 can be manufactured by 12-number I-steel, the hanging beam 21 is connected by 10-number I-steel to form a frame, and the springboard 22 is paved to form a jumping stand.

Then, the square manhole 3 of the furnace top is opened, a winch is arranged for hoisting the cooling wall 4, the descending height and the descending angle of the cooling wall can be controlled through ropes tied at the two positions of the pulley assembly 5 and the crane 6 during hoisting, so that a new cooling wall 4 is hoisted in from the square manhole 3 of the furnace top, and then an operator can install the cooling wall through installation tools such as bolts.

As shown in FIG. 5, a plurality of cooling walls 4 are longitudinally arranged at a plurality of positions on a common furnace body, after the installation of the lower cooling wall is finished, support columns 28 are continuously installed on the jump frame paved for the first time as shown in the figure, a second-layer operation platform is manufactured by extending upwards, and the upper cooling wall is convenient to install. It will be appreciated by those skilled in the art that the length of the posts 23 may also be varied to increase the height of the jump stand for mounting the upper stave.

In view of the above-described operational steps, in combination with reality, the present application also proposes some preferred embodiments or structures:

the support piece 2 also comprises a safety rope which can extend in from the cavity opening of the tuyere large sleeve 1 or be connected with other parts on the furnace body for binding and protecting an operator. Further improving the safety of the operation.

The support 2 is a detachable component, for example, each part in the support 2 is detachably connected by bolts, and of course, the support 2 can also be welded firstly and then cut off.

The steps may further include: when the stave 4 is installed, the stave 4 is sheathed. For the purpose of anti-collision of the cooling wall 4, it can be removed after being torn off after being mounted.

The steps further include: grouting is carried out between the cooling wall 4 and the carbon bricks provided with the cooling wall 4, and the grouting material is silicon carbide pressing material.

The installation site on the furnace wall for installing the stave cooler 4 is cleaned before the support 2 is installed.

The cleaning method comprises the following steps:

ejecting the cooling wall from the outside of the furnace by adopting the existing oil press;

and a slider is arranged through a winch, and the ejected cooling wall is lifted out of the square manhole 3 at the top of the furnace.

The cleaning method further comprises the following steps: and (3) hanging the digging machine assembly into the furnace through a square manhole 3 at the furnace top, assembling the digging machine in the furnace, and cleaning residues in the furnace.

The digger cleans slag on the furnace wall from top to bottom.

In summary, referring to fig. 1 to 5, a method for installing a cooling wall in a tuyere zone of a blast furnace is provided, which comprises the following steps:

a supporting piece 2 is arranged through a cavity opening of the tuyere large sleeve 1 and is used for supporting the operation of an operator;

lifting a cooling wall 4 to the upper part of the support piece 2 through a square manhole 3 on the furnace roof, and installing the cooling wall 4;

the support 2 is removed.

Those skilled in the art will appreciate that the data so used may be interchanged as appropriate for the embodiments of the present application described herein. In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.

Claims

1. The method for installing the cooling wall of the blast furnace tuyere zone is characterized by comprising the following steps of:

and (5) removing the support.

2. The method for installing the cooling wall of the tuyere zone of the blast furnace according to claim 1, wherein the supporting member comprises a cantilever, a springboard, a column, a longitudinal beam, a cross beam and an inclined strut, one end of the cantilever is positioned outside the cavity opening of the tuyere large sleeve and is connected to the furnace shell through the inclined strut, and the other end of the cantilever passes through the cavity opening of the tuyere large sleeve to form a springboard with the cross beam, the column, the longitudinal beam and the springboard.

3. The method for installing a cooling wall in a tuyere zone of a blast furnace according to claim 1, wherein the supporting member further comprises a safety rope for binding protection of an operator.

4. A blast furnace tuyere zone stave mounting method according to claim 2, wherein said supporting member is a detachable member.

5. The method for installing a cooling wall in a tuyere zone of a blast furnace according to claim 1, wherein said steps further comprise: and (5) wrapping the cooling wall with a sheath.

6. The method for installing a cooling wall in a tuyere zone of a blast furnace according to claim 1, wherein said steps further comprise: grouting is carried out between the cooling wall and the carbon bricks provided with the cooling wall, and the grouting material is silicon carbide pressing material.

7. A blast furnace tuyere zone stave mounting method according to any one of claims 1 to 6, wherein a mounting portion for mounting the stave on the furnace wall is cleaned before mounting the support member.

8. The blast furnace tuyere zone stave mounting method according to claim 7, characterized in that said cleaning method comprises the steps of:

ejecting the cooling wall from the outside of the furnace through an oil press;

9. The method for installing a cooling wall in a tuyere zone of a blast furnace according to claim 7, wherein said cleaning method further comprises the steps of: and (3) hanging the digging machine assembly into a square manhole at the furnace top, assembling the digging machine in the furnace, and cleaning residues in the furnace.

10. A blast furnace tuyere zone stave mounting method according to claim 9, wherein said digger cleans slag on the upper to lower furnace wall.