CN109338066B - Modular relocation construction method for horizontal annealing furnace - Google Patents
Modular relocation construction method for horizontal annealing furnace Download PDFInfo
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- CN109338066B CN109338066B CN201811245250.6A CN201811245250A CN109338066B CN 109338066 B CN109338066 B CN 109338066B CN 201811245250 A CN201811245250 A CN 201811245250A CN 109338066 B CN109338066 B CN 109338066B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- Organic Chemistry (AREA)
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
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Abstract
The invention provides a modular relocation construction method for a horizontal annealing furnace, which comprises the following steps: a: cutting the furnace body into a plurality of sections along the length direction of the furnace body, wherein the weight of each section is less than a specific weight a; b: transporting each of said segments to a new installation site; c: and connecting two adjacent sections to form a complete furnace body. The modular relocation construction method for the horizontal annealing furnace provided by the invention ensures that the horizontal annealing furnace can have performance indexes before relocation. A construction mode of protecting the environment, reducing solid wastes and fully utilizing the old is provided for the implementation of the relocation of the current urban steel works, the complex workload of the dismantling and the installation is reduced, the construction efficiency is greatly improved, and the construction period is shortened.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a modular relocation construction method for a horizontal annealing furnace.
Background
Along with the development of big cities, large-scale steel plants gradually move outwards, and the moving engineering is realized by the original dismantling and building mode. The Shanghai Krupp stainless steel cold rolling plant is moved to Fujian from Shanghai, wherein 2 horizontal annealing furnaces of a cold acid line and a hot acid line are moved according to the original mode of dismantling the original building. The stainless steel cold rolling horizontal annealing furnace body consists of 1 section of preheating section and 3 sections of heating section, the length of each section of furnace body is 20-25 m, the cross section width is less than 4m 5m, and refractory bricks and fiber modules are arranged in the furnace body. The furnace body outside has the nozzle and, detects original paper flange hole.
The horizontal annealing furnace is disassembled into parts to be assembled after being disassembled, the original state is difficult to achieve, if the method is not proper, the furnace body equipment is deformed, the refractory material in the furnace body is seriously damaged, the subsequent installation workload is large, the removal is a severe test, and the vertical bright furnace is difficult to ensure to have performance indexes before the removal.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a modular relocation construction method for a horizontal annealing furnace, which ensures that the horizontal annealing furnace can have performance indexes before relocation.
The invention provides a modular relocation construction method for a horizontal annealing furnace, which comprises the following steps:
a: cutting the furnace body into a plurality of sections along the length direction of the furnace body, wherein the weight of each section is less than a specific weight a;
b: transporting each of said segments to a new installation site;
c: connecting two adjacent sections to form a complete furnace body;
in the step a, the method for cutting two adjacent segments specifically includes:
a1: a cutting mark is drawn on the outer wall of the furnace body;
a2: removing the refractory material on the inner wall of the furnace body and at the position corresponding to the cutting mark, so that the furnace shell with the specific size b within the width range is not covered by the refractory material;
a3: an internal reinforcing component is supported on the inner wall of the subsection;
a4: a plurality of bolt positioning plate assemblies are arranged on the outer wall of the furnace body along the circumferential direction, and each bolt positioning plate assembly is arranged on two sides of the cutting mark in a spanning mode and fixed on the outer wall of the furnace body;
a5: at least one centering mark is arranged on the outer wall of the furnace body along the circumferential direction;
a6: cutting the furnace shell at the cutting mark, and after the cutting is finished, disassembling the bolt positioning plate assembly to separate two adjacent sections;
in the step C, the method for connecting two adjacent segments specifically includes:
c1: aligning two adjacent segments by the centering mark;
c2: connecting and fixing two adjacent sections through the bolt positioning assembly;
c3: the furnace shell is welded and connected along the cutting mark ring direction;
c4: removing the segmented internal reinforcement assembly;
c5: and filling refractory materials on the inner wall of the furnace body corresponding to the cutting marks to cover the exposed furnace shell.
Further, in the step a3 and the step C4, the internal reinforcing component includes:
the wooden clamp plate is matched with the inner wall of the subsection in shape and is attached to the inner wall of the subsection;
the supporting rods are supported on the wooden clamp plates in an internal mode;
and the steel plates are fixed on the furnace shell of the subsection, positioned at two ends of the subsection and used for resisting the refractory materials on the subsection.
Further, the specific weight a is 15-35 t.
Further, the specific weight a is 20 t.
Further, the specific size b is 50-300 mm.
Further, the specific dimension b is 200 mm.
Further, in the step a6, a plasma cutting method is used to cut two adjacent segments.
Further, in the step a6, two adjacent segments are cut apart by using a symmetrical cutting method.
Further, the bolt positioning plate assembly includes: the two fixing seats and the bolt detachably connected between the two fixing seats are respectively located on two sides of the cutting mark and fixed on the outer wall of the furnace body.
The modular relocation construction method for the horizontal annealing furnace provided by the invention ensures that the horizontal annealing furnace can have performance indexes before relocation. A construction mode of protecting the environment, reducing solid wastes and fully utilizing the old is provided for the implementation of the relocation of the current urban steel works, the complex workload of the dismantling and the installation is reduced, the construction efficiency is greatly improved, and the construction period is shortened.
Drawings
FIG. 1 is a sectional view schematically showing a segment of the present invention
Fig. 2 is a cross-sectional view Q-Q of fig. 1.
In the figure, 1, a wooden clamp plate, 2, a support rod, 3, a steel plate, 4, a furnace shell and 5, refractory materials.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
A modular relocation construction method for a horizontal annealing furnace comprises the following steps:
a: cutting the furnace body into a plurality of sections along the length direction of the furnace body, wherein the weight of each section is less than a specific weight a; the furnace body comprises a preheating section and a heating section, the length of the preheating section is 23.5m, the heating section is formed by splicing a heating section I, a heating section II and a heating section III, the lengths of the heating section I, the heating section II and the heating section III are 20.5m, the preheating section, the heating section I, the heating section II and the heating section III are respectively disassembled into 2 sections according to the structural form of the furnace body and the use condition of refractory materials, the sections are totally disassembled into a furnace shell module I, a furnace shell module II, a furnace shell module III, a furnace shell module IV, a furnace shell module V, a furnace shell module VI, a furnace shell module VII and a furnace shell module VIII, the weight of each section is less than a specific weight a, and the hoisting, transportation and installation are convenient;
the 2-section boundary is determined by dividing a whole furnace top module perpendicular to the rolling line into a disassembly dividing line (cutting mark) according to the integrity of the furnace top ceramic fiber module, the position of an avoiding burner and the positions of all detection points at the position close to 1/2 of the furnace body.
B: transporting each of said segments to a new installation site;
c: and connecting two adjacent sections to form a complete furnace body.
In the step a, the method for cutting two adjacent segments specifically includes:
a1: a cutting mark is drawn on the outer wall of the furnace body;
a2: removing the refractory material on the inner wall of the furnace body and at the position corresponding to the cutting mark, so that the furnace shell with the specific size b within the width range is not covered by the refractory material;
removing the refractory materials:
the furnace top ceramic fiber modules are protectively removed, according to the cutting marks, firstly removing a row of furnace top ceramic fiber modules along the cutting marks, removing the furnace side wall refractory bricks, and finally removing the furnace bottom refractory bricks, wherein the removing width of the refractory bricks is the width of a specific size b which is the same as the left and right of the cutting marks, when the refractory bricks are cut, a brick-laying machine is held by hands, the refractory bricks are removed by adopting the original lap joint, a lap joint masonry line is drawn firstly before cutting, refractory materials are removed roughly according to the line, the condition that the inner wall of the disassembled furnace shell has the specific size b on the same section of four sides and has no refractory materials is ensured, and the furnace shell is convenient to cut;
a3: an internal reinforcing component is supported on the inner wall of the subsection;
a4: a plurality of bolt positioning plate assemblies are arranged on the outer wall of the furnace body along the circumferential direction, and each bolt positioning plate assembly is arranged on two sides of the cutting mark in a spanning mode and fixed on the outer wall of the furnace body;
a5: at least one centering mark is arranged on the outer wall of the furnace body along the circumferential direction;
a6: and cutting the furnace shell at the cutting mark, and disassembling the bolt positioning plate assembly after the cutting is finished so as to separate two adjacent sections.
In the step B, the segments are lifted and transported in a proper way:
the sectional overall dimension is large, and a hoisting method can be selected according to own resources during hoisting:
the first method comprises the following steps: 4 symmetrical lifting lugs are welded on the upper structure of the furnace body, the rope is hung and directly hoisted, and the crane lifting capacity needs to meet the weight of the furnace body module;
and the second method comprises the following steps: using a carrying pole beam for auxiliary hoisting, hanging a hoisting rope between a furnace body hoisting point and the carrying pole beam, and then hanging the carrying pole beam and a crane hook on the hoisting rope;
and the third is that: and hoisting by adopting a method of double-click lifting by 2 traveling cranes.
In the step C, the method for connecting two adjacent segments specifically includes:
c1: aligning two adjacent segments by the centering mark;
c2: connecting and fixing two adjacent sections through the bolt positioning assembly;
c3: the furnace shell is welded and connected along the cutting mark ring direction;
c4: removing the segmented internal reinforcement assembly;
c5: filling refractory materials on the inner wall of the furnace body and the position corresponding to the cutting mark, and covering the exposed furnace shell;
filling a refractory material:
after the furnace shell is welded, repairing construction of refractory materials in the furnace is started, the steps of repairing and dismantling refractory materials are opposite, firstly, repairing and building of bottom bricks are completed, then repairing and building of side walls of the furnace are performed, and finally building of ceramic fiber modules at the top of the furnace is completed, furnace body refractory bricks and refractory clay are new materials, the ceramic fiber modules are waste refractory materials, and the damage of anchoring nails leaked when the furnace shell is dismantled is checked before the refractory materials are repaired, and the damaged anchoring nails are updated in time;
grinding the lapped surface of the original refractory bricks before bricking to ensure the lapped space and gap of the new and old refractory bricks, bricking the furnace wall and the furnace bottom by the refractory bricks according to the lap joint, finally, filling the bricking gap with a ceramic fiber blanket which is larger than 5mm, pointing the bricking gap with high-temperature refractory clay which is smaller than 5mm, resetting the furnace top by a disassembled ceramic fiber module, filling the gap with the ceramic fiber blanket, and brushing a layer of refractory coating after the repair is finished and flattened.
In an alternative embodiment of this embodiment, in step a3 and step C4, as shown in fig. 1 and fig. 2, after the furnace body is disassembled, in order to ensure that the refractory material and the furnace shell are not deformed and fall off during hoisting and transportation, the disassembled segments are reinforced, and the internal reinforcing component includes:
the shape of the wooden clamp plate 1 is matched with that of the inner wall of the section, the inner wall of the section is provided with a fireproof material 5, and the wooden clamp plate 1 is attached to the fireproof material 5;
a plurality of support rods 2 which are supported on the plywood 1;
and the steel plates 3 are welded and fixed on the furnace shell 4 and are positioned at two ends of the segments to resist the refractory materials 5 on the segments.
Specifically, when splint 1 consolidates, will inspect the state of furnace body equipment before consolidating, it consolidates according to crisscross the interruption of no obvious fissured refractory material 5, it consolidates to have obvious fissured full range to carry out to refractory material 5 individual point, splint 1 is laid on the refractory material 5 surfaces of the inside four sides of furnace body, the upper and lower face is fixed with the bracing piece 2 that inclines of controlling, splint 1 can be sandwich wooden template, bracing piece 2 can be the angle steel, all be the material commonly used in the construction, wrap with waterproof cloth at stove outer covering nozzle and check point position.
Furthermore, in order to prevent the deformation of the furnace shell 4, angle steel is used as a millet support at two ends of the segments and is welded and fixed on the furnace shell, a sandwich wood template is used for plugging the outer side of the segments, and waterproof cloth is used for binding and fixing the segments to prevent water leakage in rainy days;
after each section is disassembled, an internal reinforcing component is adopted to reinforce the inside, so that the refractory materials 5 are prevented from scattering during hoisting and transportation, and the furnace shell 4 is prevented from deforming.
In an optional implementation manner of this embodiment, the specific weight a is 15 to 35t, and preferably, the specific weight a is 20 t.
In an optional implementation manner of this embodiment, the specific dimension b is 50 to 300mm, and preferably, the specific dimension b is 200 mm.
In an optional implementation manner of this embodiment, in the step a6, two adjacent segments are cut apart by using a plasma cutting method.
In an alternative embodiment of this embodiment, two adjacent segments are cut apart by using a symmetrical cutting method.
In an optional implementation manner of this embodiment, the bolt positioning plate assembly includes: the two fixing seats and the bolt detachably connected between the two fixing seats are respectively located on two sides of the cutting mark and fixed on the outer wall of the furnace body.
The scope of the invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (9)
1. The modular relocation construction method of the horizontal annealing furnace is characterized by comprising the following steps:
a: cutting the furnace body into a plurality of sections along the length direction of the furnace body, wherein the weight of each section is less than a specific weight (a);
b: transporting each of said segments to a new installation site;
c: connecting two adjacent sections to form a complete furnace body;
in the step a, the method for cutting two adjacent segments specifically includes:
a1: drawing a cutting mark on the outer wall of the furnace body, wherein a whole furnace top module vertical to the rolling line is used as the cutting mark;
a2: removing refractory materials on the inner wall of the furnace body and at the position corresponding to the cutting mark, so that the furnace shell with the specific size (b) within the width range is not covered by the refractory materials;
a3: an internal reinforcing component is supported on the inner wall of the subsection;
a4: a plurality of bolt positioning plate assemblies are arranged on the outer wall of the furnace body along the circumferential direction, and each bolt positioning plate assembly is arranged on two sides of the cutting mark in a spanning mode and fixed on the outer wall of the furnace body;
a5: at least one centering mark is arranged on the outer wall of the furnace body along the circumferential direction;
a6: cutting the furnace shell at the cutting mark, and after the cutting is finished, disassembling the bolt positioning plate assembly to separate two adjacent sections;
in the step C, the method for connecting two adjacent segments specifically includes:
c1: aligning two adjacent segments by the centering mark;
c2: connecting and fixing two adjacent sections through the bolt positioning assembly;
c3: the furnace shell is welded and connected along the cutting mark ring direction;
c4: removing the segmented internal reinforcement assembly;
c5: and filling refractory materials on the inner wall of the furnace body corresponding to the cutting marks to cover the exposed furnace shell.
2. The modular relocation construction method for horizontal annealing furnace according to claim 1, wherein said internal reinforcement assembly comprises in step a3 and step C4:
the wooden clamp plate is matched with the inner wall of the subsection in shape and is attached to the inner wall of the subsection;
the supporting rods are supported on the wooden clamp plates in an internal mode;
and the steel plates are fixed on the furnace shell of the subsection, positioned at two ends of the subsection and used for resisting the refractory materials on the subsection.
3. The modular relocation construction method for a horizontal annealing furnace according to claim 1, wherein the specific weight (a) is 15 to 35 t.
4. The modular relocation construction method for a horizontal annealing furnace according to claim 3, wherein the specific weight (a) is 20 t.
5. The modular relocation construction method for a horizontal annealing furnace according to claim 1, wherein the specific dimension (b) is 50 to 300 mm.
6. The modular relocation construction method for a horizontal annealing furnace according to claim 5, wherein the specific dimension (b) is 200 mm.
7. The modular relocation construction method for horizontal annealing furnace according to claim 1, wherein in step a6, two adjacent segments are cut apart by plasma cutting.
8. The modular relocation construction method for horizontal annealing furnace according to claim 1, wherein in step a6, two adjacent segments are cut by symmetrical cutting.
9. The modular relocation construction method for horizontal annealing furnace according to claim 1, wherein the bolt positioning plate assembly comprises: the two fixing seats and the bolt detachably connected between the two fixing seats are respectively located on two sides of the cutting mark and fixed on the outer wall of the furnace body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811245250.6A CN109338066B (en) | 2018-10-24 | 2018-10-24 | Modular relocation construction method for horizontal annealing furnace |
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| CN201811245250.6A CN109338066B (en) | 2018-10-24 | 2018-10-24 | Modular relocation construction method for horizontal annealing furnace |
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| CN109338066A CN109338066A (en) | 2019-02-15 |
| CN109338066B true CN109338066B (en) | 2020-07-21 |
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| CN111595154B (en) * | 2020-05-27 | 2024-05-24 | 宝钢工程技术集团有限公司 | Rapid-construction continuous annealing furnace and construction method thereof |
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| CN101240663A (en) * | 2007-12-18 | 2008-08-13 | 上海市特种设备监督检验技术研究院 | 400 cubic meter high-strength steel ball tank detaching, transferring and integral assembly welding method |
| CN101451397A (en) * | 2007-12-05 | 2009-06-10 | 中冶天工建设有限公司 | Steel structure modularization construction process |
| CN105442866A (en) * | 2014-08-28 | 2016-03-30 | 上海宝冶集团有限公司 | Protective dismantle and assembly method for large-scale towering steel structures |
| CN105971305A (en) * | 2016-05-17 | 2016-09-28 | 云南文山铝业有限公司 | Dismounting device and method for gasifier |
| CN106760866A (en) * | 2016-11-22 | 2017-05-31 | 山东国舜建设集团有限公司 | A kind of u-turn technique for being applied to desulfuration absorbing tower cap |
| JP2017166034A (en) * | 2016-03-17 | 2017-09-21 | Ｊｆｅプラントエンジ株式会社 | Construction method for heating furnace |
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2018
- 2018-10-24 CN CN201811245250.6A patent/CN109338066B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451397A (en) * | 2007-12-05 | 2009-06-10 | 中冶天工建设有限公司 | Steel structure modularization construction process |
| CN101240663A (en) * | 2007-12-18 | 2008-08-13 | 上海市特种设备监督检验技术研究院 | 400 cubic meter high-strength steel ball tank detaching, transferring and integral assembly welding method |
| CN105442866A (en) * | 2014-08-28 | 2016-03-30 | 上海宝冶集团有限公司 | Protective dismantle and assembly method for large-scale towering steel structures |
| JP2017166034A (en) * | 2016-03-17 | 2017-09-21 | Ｊｆｅプラントエンジ株式会社 | Construction method for heating furnace |
| CN105971305A (en) * | 2016-05-17 | 2016-09-28 | 云南文山铝业有限公司 | Dismounting device and method for gasifier |
| CN106760866A (en) * | 2016-11-22 | 2017-05-31 | 山东国舜建设集团有限公司 | A kind of u-turn technique for being applied to desulfuration absorbing tower cap |
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