阅读说明：本技术 一种转炉炉口段烟道安装找正的方法 (Method for installing and aligning flue at converter mouth section ) 是由 王文龙 魏鹏 王元成 杨振宇 于 2021-07-15 设计创作，主要内容包括：本发明涉及转炉烟道安装技术领域,具体涉及一种转炉炉口段烟道安装找正的方法,包括对炉口段烟道中心线找正以及控制炉口段烟道底部与转炉炉体间距为理论间距H±20mm,其中,对炉口段烟道中心线找正包括对氧枪口中心线找正和对炉口段烟道底部中心线找正,氧枪口中心线需与转炉炉体中心线重合、误差在±5m之内,且炉口段烟道底部中心线也需与转炉炉体中心线重合、误差在±10m之内。本方法可以保证炉口段烟道安装找正尺寸在误差范围之内,避免了炉口段烟道安装尺寸误差造成的氧枪粘渣无法提枪、下枪、涨力报警,活动烟罩升降不到位,活动烟罩更换时进出间距过小安装困难等情况发生。(The invention relates to the technical field of converter flue installation, in particular to a method for installing and aligning a converter mouth section flue, which comprises the steps of aligning a center line of the converter mouth section flue and controlling the distance between the bottom of the converter mouth section flue and a converter body to be a theoretical distance H +/-20 mm, wherein the alignment of the center line of the converter mouth section flue comprises the alignment of a center line of an oxygen lance mouth and the alignment of a center line of the bottom of the converter mouth section flue, the center line of the oxygen lance mouth needs to be overlapped with the center line of the converter body, the error is within +/-5 m, and the center line of the bottom of the converter mouth section flue needs to be overlapped with the center line of the converter body, and the error is within +/-10 m. The method can ensure that the installation alignment size of the flue at the furnace mouth section is within an error range, and avoid the situations that the slag sticking of the oxygen lance can not be carried out, the lance is off and the tension alarm is caused due to the installation size error of the flue at the furnace mouth section, the lifting of the movable smoke cover is not in place, the too small in-out distance is difficult to install when the movable smoke cover is replaced, and the like.)

1. A method for installing and aligning a flue at a converter mouth section is characterized by comprising the steps of aligning the central line of the flue at the converter mouth section and controlling the distance between the bottom of the flue at the converter mouth section and a converter body to be a theoretical distance H +/-20 mm,

the alignment of the central line of the flue at the furnace mouth section comprises the alignment of the central line of an oxygen lance mouth and the alignment of the central line of the bottom of the flue at the furnace mouth section, wherein the central line of the oxygen lance mouth needs to be overlapped with the central line of the converter body, and the error is within +/-5 m, and the central line of the bottom of the flue at the furnace mouth section needs to be overlapped with the central line of the converter body, and the error is within +/-10 m.

2. The method of claim 1 wherein aligning the lance port centerline comprises the steps of:

1) taking the oxygen lance lifting device as a fixed reference object, and obtaining the distance D1 from a fixed slideway of the oxygen lance lifting device to the center line of an oxygen lance port;

2) installing a first portal frame on the fixed slideway, wherein the distance D3 from a cross beam of the first portal frame to the fixed slideway is equal to D1, a first plumb line is arranged at the center position of the cross beam of the first portal frame, and the first plumb line is placed in the converter body;

3) finding out the center point of the oxygen lance opening, and adjusting the position of the flue at the furnace opening section to ensure that the center point of the oxygen lance opening is superposed with the first plumb line, and the error is controlled within +/-5 m, namely the center line of the oxygen lance opening is superposed with the center line of the converter body.

3. The method of claim 2, wherein step 3) draws a cross-hair from the oxygen muzzle to find the center point of the oxygen muzzle.

4. The method of claim 1 wherein aligning the lance port centerline comprises the steps of:

i) taking the oxygen lance lifting device as a fixed reference object, and obtaining the distance D1 from a fixed slideway of the oxygen lance lifting device to the center line of an oxygen lance port and the distance D2 from the fixed slideway of the oxygen lance lifting device to the center line of a sublance port;

ii) mounting a first portal frame and a second portal frame on the fixed slideway, so that the distance D3 from the beam of the first portal frame to the fixed slideway is equal to D1, the distance D4 from the beam of the second portal frame to the fixed slideway is equal to D2, arranging a first plumb line at the center of the beam of the first portal frame, placing the first plumb line into the furnace body of the converter, arranging a second plumb line at the center of the beam of the second portal frame, and placing the second plumb line into the flue of the furnace mouth section;

and iii) finding out the central points of the oxygen lance opening and the auxiliary lance opening, adjusting the position of a flue at the furnace opening section, taking the alignment data of the oxygen lance opening as a standard and the alignment data of the auxiliary lance opening as an assistant, so that the central point of the oxygen lance opening is superposed with the first plumb line, the central point of the auxiliary lance opening is superposed with the second plumb line, and the error is controlled within +/-5 m, namely the central line of the oxygen lance opening is superposed with the central line of the converter body.

5. The method as claimed in claim 4, wherein step iii) draws crosshairs from the lance port and the secondary port, respectively, to find the center points of the lance port and the secondary port.

6. The method of claim 1, wherein the step of aligning the centerline of the bottom of the flue in the throat section comprises the steps of:

taking four points P1, P2, P3 and P4 from the bottom of the flue of the furnace mouth section, respectively measuring the distances R1, R2, R3 and R4 from P1, P2, P3 and P4 to a first plumb line, and adjusting the position of the flue of the furnace mouth section to control the size errors of R1, R2, R3 and R4 within +/-10 m, namely the center line of the bottom of the flue of the furnace mouth section coincides with the center line of the furnace body of the converter.

7. The method of claim 6, wherein P1 and P3 are two points opposite to the bottom of the flue of the furnace mouth section, P2 and P4 are two points opposite to the bottom of the flue of the furnace mouth section, and a connecting line of P1 and P3 is perpendicular to a connecting line of P2 and P4.

8. The method of claim 1, wherein controlling the distance between the bottom of the flue of the throat section and the furnace body of the converter to be within the range of H ± 20mm comprises the steps of:

on the premise that the central line of the bottom of the flue of the furnace mouth section is superposed with the central line of the furnace body of the converter, four points P5, P6, P7 and P8 are taken from the top of the furnace body of the converter, the distances H1, H2, H3 and H4 from P5, P6, P7 and P8 to the bottom of the flue of the furnace mouth section are respectively measured, and the height of the flue of the furnace mouth section is adjusted to ensure that the sizes of H1, H2, H3 and H4 are within the theoretical distance H +/-20 mm, namely the reasonable distance between the bottom of the flue of the furnace mouth section and the furnace body of the converter is ensured.

Technical Field

The invention relates to the technical field of converter flue installation, in particular to a method for installing and aligning a converter mouth section flue.

Background

The converter vaporization cooling flue is one of main corollary equipments for converter steelmaking, and its main function is to recover coal gas, steam and smoke dust, and simultaneously participate in the interlocking of converter production process. The converter vaporization cooling flue is respectively a furnace mouth section flue, a straight first section flue, a straight second section flue and a tail section flue from the position close to the furnace mouth according to the position and the action.

The converter vaporization cooling flue is used for collecting high-temperature flue gas to the maximum extent during operation, bearing the highest furnace gas temperature and severe and frequent temperature changes, and simultaneously having the worst working condition and being most prone to bonding splashing steel slag. The adhesion of the inner wall of the flue and the severe change of the high temperature and high pressure born by the inner wall of the flue greatly influence the service life of the vaporization cooling flue. The furnace mouth section flue is positioned at the bottommost part of the integral converter vaporization cooling flue, the working environment is the worst, and the flue needs to be replaced every 2 years.

A certain distance exists between the converter body and the flue at the furnace mouth section, the theoretical distance is H, and the error is +/-20 mm. A skirt-shaped movable smoke hood is arranged between the converter body and the fire hole section flue, when the converter blows, the movable smoke hood descends to cover a gap between the converter body and the fire hole section flue and cover the fire hole, so that the smoke with large instantaneous change can be accommodated, the smoke does not escape outwards, and the dust removal effect of the fire hole section flue is ensured; when the converter stops blowing, the movable smoke hood rises, so that the converter can be freely shaken. Because the gap between the converter body and the fire hole section flue is also a channel for replacing the movable smoke cover, the distance between the converter body and the fire hole section flue is controlled to be H +/-H. Meanwhile, if the central line of the bottom of the flue of the furnace mouth section and the central line of the converter body are in the same position, the converter body is fixed, and if the central line of the bottom of the flue of the furnace mouth section and the central line of the converter body are not coincident, the lower part of the flue of the furnace mouth section is inclined, and the movable smoke hood can cause blocking when ascending and descending and cannot be lifted in place.

An oxygen muzzle and an auxiliary muzzle are arranged on the flue of the furnace mouth section. The oxygen lance enters the converter body from the oxygen lance port through the oxygen lance lifting device for blowing, and the center line of the oxygen lance is consistent with the center line of the converter body, namely the center line of the oxygen lance port is required to be consistent with the center line of the converter body. The sublance enters the converter body from a sublance opening through a sublance lifting device to perform temperature measurement sampling. Steel slag can be bonded on the converter body in the processes of blowing and temperature measurement sampling when the oxygen lance and the sublance enter the converter body, so that the diameters of the oxygen lance and the sublance become thicker, if the deviation sizes of the center lines of the oxygen lance opening and the sublance opening are larger, the oxygen lance opening and the sublance opening can be cut and rubbed in the lifting and lifting process, so that the tension alarm of the oxygen lance and the sublance is caused, if the slag is seriously bonded, the oxygen lance opening and the sublance opening can not be lifted even, even the oxygen lance opening and the sublance opening of a flue at the furnace mouth section are pulled to be damaged, the equipment is damaged, and the production is stopped for a long time.

At present, a furnace mouth section flue is replaced without a clear reference and an alignment method, the positions of an original oxygen gun mouth, an auxiliary gun mouth and the bottom of a furnace mouth section flue are marked every time, alignment is carried out according to the original installation size, and the deviation of the installation alignment size of the follow-up furnace mouth section flue is gradually accumulated due to the deviation of the measurement size of each time of installation alignment, so that the oxygen gun sticking slag cannot lift the gun, lower the gun and give an alarm by tension, the movable smoke cover is not lifted in place, the movable smoke cover is difficult to install due to too small in-out distance during replacement, and the like.

Disclosure of Invention

The invention provides a method for installing and aligning a converter mouth section flue, which aims to solve the technical problems that the slag sticking of an oxygen lance cannot be carried out by the lance, the lance is lowered and the tension is alarmed, a movable smoke hood is not lifted in place, and the installation is difficult when the movable smoke hood is replaced due to too small inlet and outlet distances.

A method for installing and aligning a flue at a converter mouth section comprises the steps of aligning the central line of the flue at the converter mouth section and controlling the distance between the bottom of the flue at the converter mouth section and a converter body to be a theoretical distance H +/-20 mm, wherein,

the alignment of the central line of the flue at the furnace mouth section comprises the alignment of the central line of an oxygen lance mouth and the alignment of the central line of the bottom of the flue at the furnace mouth section, wherein the central line of the oxygen lance mouth needs to be overlapped with the central line of the converter body, the error is within +/-5 m, and the central line of the bottom of the flue at the furnace mouth section needs to be overlapped with the central line of the converter body, and the error is within +/-10 m;

the theoretical distance H between the bottom of the flue at the furnace mouth section and the furnace body of the converter is obtained by a design drawing.

Further, in one embodiment, the alignment of the center line of the oxygen lance opening comprises the following steps:

1) taking the oxygen lance lifting device as a fixed reference object, and obtaining the distance D1 from a fixed slideway of the oxygen lance lifting device to the center line of an oxygen lance port, wherein the obtaining method of D1 can be an inquiry drawing;

2) installing a first portal frame on the fixed slideway, wherein the distance D3 from a cross beam of the first portal frame to the fixed slideway is equal to D1, a first plumb line is arranged at the center position of the cross beam of the first portal frame, and the first plumb line is placed in the converter body;

3) finding out the center point of the oxygen lance opening, and adjusting the position of the flue at the furnace opening section to ensure that the center point of the oxygen lance opening is superposed with the first plumb line, and the error is controlled within +/-5 m, namely the center line of the oxygen lance opening is superposed with the center line of the converter body.

Further, step 3) drawing a cross line from the oxygen gun mouth to find out the center point of the oxygen gun mouth.

Further, in another embodiment, the alignment of the center line of the oxygen lance opening comprises the following steps:

i) taking the oxygen lance lifting device as a fixed reference object, and acquiring the distance D1 from a fixed slideway of the oxygen lance lifting device to the center line of an oxygen lance port and the distance D2 from the fixed slideway of the oxygen lance lifting device to the center line of a sublance port, wherein the acquiring method of D1 and D2 can be an inquiry drawing;

ii) mounting a first portal frame and a second portal frame on the fixed slideway, so that the distance D3 from the beam of the first portal frame to the fixed slideway is equal to D1, the distance D4 from the beam of the second portal frame to the fixed slideway is equal to D2, arranging a first plumb line at the center of the beam of the first portal frame, placing the first plumb line into the furnace body of the converter, arranging a second plumb line at the center of the beam of the second portal frame, and placing the second plumb line into the flue of the furnace mouth section;

and iii) finding out the central points of the oxygen lance opening and the auxiliary lance opening, adjusting the position of a flue at the furnace opening section, taking the alignment data of the oxygen lance opening as a standard and the alignment data of the auxiliary lance opening as an assistant, so that the central point of the oxygen lance opening is superposed with the first plumb line, the central point of the auxiliary lance opening is superposed with the second plumb line, and the error is controlled within +/-5 m, namely the central line of the oxygen lance opening is superposed with the central line of the converter body.

Further, step iii) drawing crosshairs from the oxygen lance opening and the auxiliary lance opening respectively to find out the central points of the oxygen lance opening and the auxiliary lance opening.

Further, the alignment of the central line of the bottom of the flue of the furnace mouth section comprises the following steps:

taking four points P1, P2, P3 and P4 from the bottom of the flue of the furnace mouth section, respectively measuring the distances R1, R2, R3 and R4 from P1, P2, P3 and P4 to a first plumb line, and adjusting the position of the flue of the furnace mouth section to control the size errors of R1, R2, R3 and R4 within +/-10 m, namely the center line of the bottom of the flue of the furnace mouth section coincides with the center line of the furnace body of the converter. When the center line of the bottom of the flue at the furnace mouth section is adjusted to coincide with the center line of the converter body, the center line of the oxygen lance mouth is considered to coincide with the center line of the converter body, and when the two alignment sizes are within an error, the center line of the flue at the furnace mouth section is accurately aligned.

Furthermore, P1 and P3 are two opposite points at the bottom of the flue of the furnace mouth section, P2 and P4 are two opposite points at the bottom of the flue of the furnace mouth section, and a connecting line of P1 and P3 is vertical to a connecting line of P2 and P4.

Further, the step of controlling the distance between the bottom of the flue at the furnace mouth section and the converter body to be the theoretical distance H +/-20 mm comprises the following steps:

on the premise that the central line of the bottom of the flue of the furnace mouth section is superposed with the central line of the furnace body of the converter, four points P5, P6, P7 and P8 are taken from the top of the furnace body of the converter, the distances H1, H2, H3 and H4 from P5, P6, P7 and P8 to the bottom of the flue of the furnace mouth section are respectively measured, and the height of the flue of the furnace mouth section is adjusted to ensure that the sizes of H1, H2, H3 and H4 are within the theoretical distance H +/-20 mm, namely the reasonable distance between the bottom of the flue of the furnace mouth section and the furnace body of the converter is ensured.

The beneficial effect of the invention is that,

the method for installing and aligning the flue at the furnace mouth section provided by the invention respectively aligns the center line of the oxygen lance mouth and the center line of the converter body, wherein the error is within +/-5 m, the center line of the bottom of the flue at the furnace mouth section is also overlapped with the center line of the converter body, and the error is within +/-10 m; secondly, each point of the distance between the bottom of the flue at the furnace mouth section and the converter body is guaranteed to be within 820mm +/-20 mm.

The method can ensure that the installation alignment size of the flue at the furnace mouth section is within an error range, and avoid the situations that the slag sticking of the oxygen lance can not be carried out, the lance is off and the tension alarm is caused due to the installation size error of the flue at the furnace mouth section, the lifting of the movable smoke cover is not in place, the too small in-out distance is difficult to install when the movable smoke cover is replaced, and the like.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic view of the structure of a flue of a tuyere section;

FIG. 2 is a schematic view of the process of S11 aligning the center line of the lance nozzle in example 1;

FIG. 3 is a schematic view of the method for aligning the centerline of the bottom of the flue of the tuyere section S12 in example 1;

FIG. 4 is a schematic view showing a method of S2 for controlling the distance between the bottom of the flue of the port section and the body of the converter in example 1.

In the figure, 1-a converter body, 2-a fire hole section flue, 3-an oxygen gun mouth, 4-an auxiliary gun mouth, 5-a fixed slideway, 6-a first portal frame and 7-a second portal frame.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all 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.

Example 1

As shown in fig. 1-4, a method for installing and aligning a flue at a converter mouth section comprises the following steps:

s1: aligning the central line of the flue at the furnace mouth section

S11: aligning the center line of the oxygen lance port

1) Inquiring a design drawing by taking the oxygen lance lifting device as a fixed reference object, wherein the distance D1 from a fixed slideway 5 of the oxygen lance lifting device to the center line of an oxygen lance port is 658 mm;

2) a first portal frame 6 is installed on the fixed slideway 5, the first portal frame 6 comprises a first connecting beam A, a first connecting beam B and a first cross beam, one end of the first connecting beam A is welded with one sliding rail of the fixed slideway 5, one end of the first connecting beam B is welded with the other sliding rail of the fixed slideway 5, a first cross beam is welded between the free end of the first connecting beam A and the free end of the first connecting beam B, the distances D3 and D1 from the first cross beam to the fixed slideway 5 are equal to 658mm, a first plumb line is arranged at the center of the first cross beam, and the first plumb line is placed in the converter body 1;

3) respectively drawing cross lines from the oxygen lance port 3, finding out the central point of the oxygen lance port 3, adjusting the position of the flue 2 at the furnace mouth section to ensure that the central point of the oxygen lance port 3 is superposed with the first plumb line, and controlling the error within +/-5 m, namely the central line of the oxygen lance port 3 is superposed with the central line of the converter body 1.

S12: aligning the central line of the bottom of the flue at the furnace mouth section

Taking four points of a positive east P1, a positive west P2, a positive south P3 and a positive north P4 from the bottom of the furnace mouth section flue 2, respectively measuring distances R1, R2, R3 and R4 from P1, P2, P3 and P4 to a first plumb line, and adjusting the position of the furnace mouth section flue 2 to control the size errors of R1, R2, R3 and R4 within +/-10 m, namely, the center line of the bottom of the furnace mouth section flue 2 is superposed with the center line of the converter body 1.

When the center line of the bottom of the furnace mouth section flue 2 is adjusted to coincide with the center line of the converter body 1, the center line of the oxygen lance mouth 3 is coincided with the center line of the converter body 1, and when the two alignment sizes are within an error, the center line of the furnace mouth section flue 2 is accurately aligned.

S2: controlling the distance between the bottom of the flue at the furnace mouth section and the converter body to be H +/-20 mm

Inquiring a design drawing, and knowing that the theoretical spacing H is 820 mm;

on the premise that the central line of the bottom of the flue 2 of the furnace mouth section is superposed with the central line of the converter body 1, four points of a positive east P5, a positive west P6, a positive south P7 and a positive north P8 are taken from the top of the converter body 1, the distances H1, H2, H3 and H4 from P5, P6, P7 and P8 to the bottom of the flue 2 of the furnace mouth section are respectively measured, and the height of the flue 2 of the furnace mouth section is adjusted, so that the sizes of the H1, H2, H3 and H4 are all within 820mm +/-20 mm of theoretical distance, namely, the reasonable distance between the bottom 2 of the flue of the furnace mouth section and the converter body 1 is ensured.

Example 2

As shown in fig. 1-4, on the basis of embodiment 1, the method of aligning the center line of the oxygen lance port 3 by using the alignment data of the oxygen lance port 3 as the standard and the alignment data of the sublance port 4 as the assistant can be adopted, which comprises the following steps:

i) inquiring a design drawing by taking the oxygen lance lifting device as a fixed reference object, wherein the distance D1 from a fixed slideway 5 of the oxygen lance lifting device to the center line of an oxygen lance port 3 is 658mm, and the distance D2 from the fixed slideway 5 to the center line of an auxiliary lance port 4 is 1608 mm;

ii) a first door-shaped frame 6 is arranged on the fixed slideway 5, the first door-shaped frame 6 comprises a first connecting beam A, a first connecting beam B and a first cross beam, one end of the first connecting beam A is welded with one sliding rail of the fixed slideway 5, one end of the first connecting beam B is welded with the other sliding rail of the fixed slideway 5, a first cross beam is welded between the free end of the first connecting beam A and the free end of the first connecting beam B, the distances D3 and D1 from the first cross beam to the fixed slideway 5 are equal to 658mm, a first plumb line is arranged at the center of the first cross beam, and the first plumb line is placed in the converter body 1;

a second portal frame 7 is installed on the fixed slideway 5, the second portal frame 7 comprises a second connecting beam A, a second connecting beam B and a second cross beam, one end of the second connecting beam A is welded with one sliding rail of the fixed slideway 5, one end of the second connecting beam B is welded with the other sliding rail of the fixed slideway 5, a second cross beam is welded between the free end of the second connecting beam A and the free end of the second connecting beam B, the distance D4 and D2 from the second cross beam to the fixed slideway 5 are equal to 1608mm, a second plumb line is arranged at the center of the second cross beam, and the second plumb line is placed in the flue 2 at the furnace mouth section;

and iii) respectively drawing cross lines from the oxygen lance port 3 and the auxiliary lance port 4, finding out the central points of the oxygen lance port 3 and the auxiliary lance port 4, adjusting the position of a flue 2 at the section of the furnace port, taking the alignment data of the oxygen lance port 3 as the standard and the alignment data of the auxiliary lance port 4 as the auxiliary, so that the central point of the oxygen lance port 3 is superposed with the first plumb line, the central point of the auxiliary lance port 4 is superposed with the second plumb line, and the error is controlled within +/-5 m, namely the central line of the oxygen lance port 3 is superposed with the central line of the converter body 1.

Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention.