CN113846198A - Construction method for building blast furnace body - Google Patents
Construction method for building blast furnace body Download PDFInfo
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- CN113846198A CN113846198A CN202111161005.9A CN202111161005A CN113846198A CN 113846198 A CN113846198 A CN 113846198A CN 202111161005 A CN202111161005 A CN 202111161005A CN 113846198 A CN113846198 A CN 113846198A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
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- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The embodiment of the invention discloses a masonry construction method of a blast furnace body, which comprises the following steps: the method comprises the steps of cooling wall pointing → furnace bottom flat steel mesh welding and carbon ramming material leveling → furnace bottom carbon brick building → furnace bottom two-layer annular carbon building → furnace bottom three-layer ceramic cup bottom pad building → furnace hearth annular microporous carbon bricks and ceramic cups are alternately built → tuyere combined brick building → furnace belly protective shed dismounting → furnace belly and building above the furnace belly → hanging disc dismounting, cleaning → furnace body grouting.
Description
Technical Field
The invention relates to the field of blast furnace installation, in particular to a masonry construction method of a blast furnace body.
Background
The blast furnace uses steel plate as furnace shell, and refractory brick lining is built in the shell. The blast furnace body is divided into a furnace throat, a furnace body, a furnace waist, a furnace belly and a furnace hearth 5 from top to bottom. Because of the advantages of good economic index, simple process, large production capacity, high labor production efficiency, low energy consumption and the like of the blast furnace ironmaking technology, the iron produced by the method accounts for the vast majority of the total iron production in the world.
In the production of a blast furnace, iron ore, coke, and a flux (limestone) for slag formation are charged from the top of the furnace, and preheated air is blown through tuyeres located along the periphery of the furnace at the lower part of the furnace. Carbon in coke (some blast furnaces also blow auxiliary fuel such as coal dust, heavy oil, natural gas and the like) at high temperature is combusted with oxygen blown into air to generate carbon monoxide and hydrogen, and oxygen in iron ore is removed in the ascending process in the furnaces, so that iron is obtained by reduction. The smelted molten iron is discharged from the iron notch. Unreduced impurities in the iron ore are combined with fluxes such as limestone to generate slag, and the slag is discharged from a slag hole. The generated gas is discharged from the top of the furnace, and is used as fuel for hot blast stoves, heating furnaces, coke ovens, boilers and the like after dust removal. The main products of blast furnace smelting are pig iron, and blast furnace slag and blast furnace gas are also by-products.
The blast furnace body refractory construction is a key part of the whole blast furnace system, and directly influences the service life of the blast furnace.
Disclosure of Invention
The embodiment of the invention provides a construction method for building a blast furnace body, which is used for completing construction of key parts, prolonging the service life and shortening the construction period.
To achieve the purpose, the embodiment of the invention provides the following technical scheme:
the masonry construction method of the blast furnace body comprises the following steps:
the method comprises the steps of cooling wall pointing → furnace bottom flat steel mesh welding and carbon ramming material leveling → furnace bottom carbon brick building → furnace bottom two-layer annular carbon building → furnace bottom three-layer ceramic cup bottom pad building → furnace hearth annular microporous carbon bricks and ceramic cups are alternately built → tuyere combined brick building → furnace belly protective shed dismantling → furnace belly and building above the furnace belly → dismantling hanging scaffold, cleaning → furnace body grouting.
Further, in the step of jointing construction of the cooling wall:
cutting the sealing iron sheet with corresponding size according to the width size of the vertical seam and the circular seam and the length size of the steel brick and the cooling wall;
tightly attaching the sealing iron sheet to the back of the cooling wall, tensioning the sealing iron sheet by using a 20# iron wire and a bamboo stick, and fixing the sealing iron sheet on the front of the cooling wall;
when the cooling wall iron scrap filler is used for pointing, vertical joints are sequentially pointed and filled from bottom to top and from inside to outside layer by layer, and then circular joints are pointed and filled from inside to outside.
Further, the jointing construction time of the cooling wall is as follows:
the blast furnace has the following furnace bosh: the joint pointing of the cooling wall and the installation of the cooling wall are performed in a crossed way, and the part of the work is required to be finished before the carbon brick is built;
above the blast furnace bosh: stave pointing is performed alternately with installation.
Further, for building the furnace bottom carbon bricks, furnace bottom graphite blocks and half graphite blocks are built by adopting a vacuum chuck, and microporous carbon bricks are built by adopting a clamp;
discharging a cross center line built by each layer of carbon bricks on the furnace shell;
after the construction acceptance of the furnace bottom carbon ramming material leveling layer is qualified, dry coding the carbon brick numbers in corresponding positions;
finishing the placement of the wood supporting area and the carbon brick supporting area;
according to the serial number position of the carbon bricks, building the carbon bricks one by one from a building center line to one side to finish 5-6 rows, then building the carbon bricks one by one from two sides simultaneously, and driving wood wedges for fixing between two ends of each row of bricks and a cooling wall;
the carbon bricks are built by double-sided carbon oil, the carbon bricks are tightly pressed by a jack after each row of building is finished, building mortar joints are checked one by using a filler gauge, and the building requirement of the carbon bricks is that vertical joints and horizontal joints are smaller than 1 mm;
during building, tracking and detecting each carbon brick by using a level gauge so as to ensure the flatness of the surface;
after the whole layer of carbon bricks are built, the carbon ramming materials in the expansion joint between the carbon bricks and the cooling wall are rammed according to the symmetry principle, the ramming is carried out according to the sequence of laying one layer of ramming materials, the thickness of each layer of ramming materials is not more than 150mm, and the compression ratio is more than or equal to 40%;
and after the whole layer of carbon bricks are built, measuring and checking, and grinding and leveling unqualified points.
Further, alternately building annular microporous carbon bricks and ceramic cups of the hearth, before building, installing a radius gauge according to a determined central line, drawing a circumferential line of the hearth according to the radius gauge, leveling the surface of the bottom of the annular zone below the wall of the hearth, and selecting bricks with the consistent length direction to be built in the same brick ring.
Further, for the construction of the tuyere combination bricks, leveling and finishing the surface flatness and elevation of the brick layer under the tuyere combination bricks according to the average value of the center elevation actually measured by 24 tuyeres;
putting the vertical center line of the tuyere on a brick layer below the tuyere combined bricks to be used as a control line for building each group of tuyere combined bricks;
building from the radial centers of the two tuyeres to two sides, and building the outer ring bricks firstly and then building the inner ring bricks;
firstly building a lower semi-ring, mounting a middle sleeve of the tuyere after the combined bricks of the lower semi-ring are built, building the combined bricks of the upper semi-ring by using a vacuum chuck crane or a lifting appliance, and filling and tamping expansion joint materials among the large tuyere, the middle sleeve and the combined bricks;
when the upper semi-ring is built, the bricks are supported by prefabricated wood boards, the wood boards are drawn out after the door is closed, and finally gap materials are filled;
the construction of ramming mass on the back of the combined brick and the building of brick layers are alternately carried out;
and after the tuyere combined bricks are built, continuing building a plurality of layers of bricks on the upper part of the tuyere, then removing the furnace belly protective shed, and after all the bricks are removed, building two feeding tuyere combined bricks in a repairing way.
Further, before the jointing of the cooling wall, the installation of the protective shed and the hanging scaffold is carried out.
Further, the specific method for the furnace bottom flat steel mesh welding and charcoal ramming material leveling steps comprises the following steps:
(1) and (3) measurement and paying-off: taking the cross center lines of the bottom and the hearth of the blast furnace as the basis, discharging the arrangement line of the flat steel mesh of the leveling layer, calculating the top surface elevation of the discharged bottom carbon ramming material by taking the average elevation of the center of the taphole as the reference, and marking the top surface elevation on the cooling wall by using red paint;
(2) mounting a support column: before the water-cooled tube is installed, an angle steel upright post for fixing the flat steel mesh is welded on a furnace bottom plate and used as a support pillar of the flat steel mesh;
(3) cleaning: after the water-cooled tube is installed, removing residues, sundries and iron rust on the surface of the furnace bottom sealing plate and the surface of the water-cooled tube;
(4) cross center line: referring to the center of the blast furnace in the previous process, after rechecking, discharging a cross center line at the bottom of the furnace, and marking the cross center line, lines 450, 1350, 2250 and 3150 on the cooling wall by using red paint;
(5) pouring heat-resistant concrete: pouring heat-resistant concrete from two sides to the middle water-cooled tube, and vibrating by using a vibrating rod during pouring;
(6) leveling: leveling the heat-resistant concrete by using a customized scraper plate and taking the upper surface of the water-cooling pipe as a reference;
(7) flat steel mesh: after the heat-resistant concrete is solidified, welding or mounting a flat steel mesh according to the arrangement line and the elevation control line;
(8) ramming: ramming the materials in a spacing and layering way, and leveling one by using a leveling scraper;
(9) and (3) measuring elevation: and measuring, checking and confirming the surface elevation, and repairing the unqualified points.
Compared with the prior art, the invention has the beneficial effects and remarkable progresses that:
the blast furnace body installed in the embodiment of the invention has short construction period, the quality of the furnace body reaches the standard, and the service life of the blast furnace is prolonged.
Drawings
To more clearly illustrate the technical solution of the present invention, the drawings required for the embodiment of the present invention will be briefly described below.
It should be apparent that the drawings in the following description are only drawings of some embodiments of the invention, and that other drawings can be obtained by those skilled in the art without inventive exercise, and the other drawings also belong to the drawings required by the embodiments of the invention.
FIG. 1 is a flow chart of the construction process according to an embodiment of the present invention;
FIG. 2 is a schematic view of the protection shed for the furnace bosh of the blast furnace according to an embodiment of the present invention;
FIG. 3 is a schematic view of the hoisting of the hanging scaffold of the blast furnace according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions, advantageous effects and significant progress of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings provided in the embodiments of the present invention.
It is to be understood that all of the described embodiments are merely some, and not all, embodiments of the invention; 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.
It should be noted that the terms "first", "second", and "third" (if present) and the like in the description and claims of the present invention and the accompanying drawings of the embodiments of the present invention are used only for distinguishing different objects and not for describing a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
It is to be understood that:
in the description of the embodiments of the present invention, the terms "upper", "lower", "top", "bottom", and other indicative orientations or positions are only used for describing the orientations or positional relationships based on the embodiments of the present invention and are used for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the devices or elements described must have a specific orientation, a specific orientation configuration and operation, and therefore, the present invention should not be construed as being limited thereto.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, movably connected, or integrated; either directly or indirectly through intervening media, intangible signal, or even optical, communication between two elements, or an interaction between two elements, unless expressly limited otherwise.
The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should be further noted that the following embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.
The technical means of the present invention will be described in detail below with specific examples.
The embodiment of the invention provides a masonry construction method of a blast furnace body, which shortens the construction period, ensures the quality of the blast furnace body and prolongs the service life of the blast furnace.
To achieve the purpose, as shown in fig. 1, the embodiment of the present invention provides the following technical solutions:
the masonry construction method of the blast furnace body comprises the following steps:
the method comprises the steps of cooling wall pointing → furnace bottom flat steel mesh welding and carbon ramming material leveling → furnace bottom carbon brick building → furnace bottom two-layer annular carbon building → furnace bottom three-layer ceramic cup bottom pad building → furnace hearth annular microporous carbon bricks and ceramic cups are alternately built → tuyere combined brick building → furnace belly protective shed dismantling → furnace belly and building above the furnace belly → dismantling hanging scaffold, cleaning → furnace body grouting.
The steps in the dashed line frame in fig. 1 are construction processes of the structure installation unit.
In an embodiment of the present invention, in the step of jointing the cooling wall:
cutting the sealing iron sheet with corresponding size according to the width size of the vertical seam and the circular seam and the length size of the steel brick and the cooling wall;
tightly attaching the sealing iron sheet to the back of the cooling wall, tensioning the sealing iron sheet by using a 20# iron wire and a bamboo stick, and fixing the sealing iron sheet on the front of the cooling wall;
when the iron filings (carbon rammed material) is used for pointing, the vertical seam is firstly hooked and filled section by section from bottom to top and from inside to outside, and then the circular seam is hooked and filled from inside to outside.
The jointing material should be kept clean in the using process, and impurities are not allowed to be mixed in.
The materials are stirred strictly according to the proportion, and the stirring amount of the jointing material is controlled to keep the jointing material to have good construction performance within a certain time.
In one embodiment of the invention, the cooling wall jointing construction time is as follows:
the blast furnace has the following furnace bosh: the joint pointing of the cooling wall and the installation of the cooling wall are performed in a crossed way, and the part of the work is required to be finished before the carbon brick is built;
above the blast furnace bosh: the cooling wall joint pointing is alternately carried out along with the installation, namely, one section of checking and accepting is installed, and the other section of hooking is carried out.
In one embodiment of the invention, for the building of the furnace bottom carbon bricks, furnace bottom graphite blocks and half graphite blocks are built by adopting a vacuum chuck, and microporous carbon bricks are built by adopting a clamp;
discharging a cross center line built by each layer of carbon bricks on the furnace shell;
after the construction acceptance of the furnace bottom carbon ramming material leveling layer is qualified, dry coding the carbon brick numbers in corresponding positions;
finishing the placement of the wood supporting area and the carbon brick supporting area;
according to the serial number position of the carbon bricks, building the carbon bricks one by one from a building center line to one side to finish 5-6 rows, then building the carbon bricks one by one from two sides simultaneously, and driving wood wedges for fixing between two ends of each row of bricks and a cooling wall;
the carbon bricks are built by double-sided carbon oil, the carbon bricks are tightly pressed by a jack after each row of building is finished, building mortar joints are checked one by using a filler gauge, and the building requirement of the carbon bricks is that vertical joints and horizontal joints are smaller than 1 mm;
during building, tracking and detecting each carbon brick by using a level gauge so as to ensure the flatness of the surface;
after the whole layer of carbon bricks are built, the carbon ramming materials in the expansion joint between the carbon bricks and the cooling wall are rammed according to the symmetry principle, the ramming is carried out according to the sequence of laying one layer of ramming materials, the thickness of each layer of ramming materials is not more than 150mm, and the compression ratio is more than or equal to 40%;
and after the whole layer of carbon bricks are built, measuring and checking, and grinding and leveling unqualified points.
In one embodiment of the invention, for alternately building annular microporous carbon bricks and ceramic cups of the hearth, all layers of hearth walls are horizontally built into mutually staggered concentric rings, and adjacent radioactive rays on the same layer and vertical seams and annular seams of upper and lower adjacent brick layers are staggered.
Before building, according to the determined central line, a radius gauge is installed, and accordingly, a circumferential line of the hearth is drawn. The surface of the furnace bottom of the annular zone below the furnace hearth wall should be leveled. In order to reduce the thickness of the circular seam as much as possible, bricks with the same length direction are selected and laid in the same brick ring.
The contact surface of the firebrick of the hearth and the cooling wall is processed into an inclined surface, and when the brick joint of the contact surface is slightly large, thick slurry with the same composition as that of brickwork can be filled.
In one embodiment of the invention, for the construction of the tuyere combination bricks, the surface flatness and elevation of a brick layer under the tuyere combination bricks are leveled and trimmed according to the average value of the actually measured center elevation of 24 tuyeres;
the vertical center lines of the air ports are put on the brick layer below the air port combined bricks, and the distance between the vertical center lines of two adjacent air ports can be properly finely adjusted on the premise of ensuring the large air port combined bricks and the allowable distance between the middle sleeves to be used as a control line for building each group of air port combined bricks;
building from the radial centers of the two tuyeres to two sides, and building the outer ring bricks firstly and then building the inner ring bricks;
firstly building a lower semi-ring, and simultaneously paying attention to control the flatness of the upper surface of the whole lower semi-ring, installing a middle sleeve of a tuyere after the combined bricks of the lower semi-ring are built, building the combined bricks of the upper semi-ring by using a vacuum chuck crane or a lifting appliance, and filling and tamping expansion joint materials among the large tuyere, the middle sleeve and the combined bricks;
when the upper semi-ring is built, the bricks are supported by prefabricated wood boards, the wood boards are drawn out after the door is closed, and finally gap materials are filled;
the construction of ramming mass on the back of the combined brick and the building of brick layers are alternately carried out;
and after the tuyere combined bricks are built, continuing building a plurality of layers of bricks on the upper part of the tuyere, then removing the furnace belly protective shed, and after all the bricks are removed, building two feeding tuyere combined bricks in a repairing way.
In an embodiment of the invention, as shown in fig. 2 and 3, before the jointing of the cooling wall, the protective shed 1 and the hanging scaffold 2 of the advanced blast furnace are manufactured in advance, the protective shed and the hanging scaffold are transported to the site for assembly by a trailer after the pre-assembly, and then are hoisted in place, and during the hoisting, the protective shed is hoisted firstly, and then the hanging scaffold is hoisted.
In an embodiment of the invention, the specific method for the furnace bottom flat steel mesh welding and charcoal ramming material leveling steps is as follows:
(1) and (3) measurement and paying-off: taking the cross center lines of the bottom and the hearth of the blast furnace as the basis, discharging the arrangement line of the flat steel mesh of the leveling layer, calculating the top surface elevation of the discharged bottom carbon ramming material by taking the average elevation of the center of the taphole as the reference, and marking the top surface elevation on the cooling wall by using red paint;
(2) mounting a support column: before the water-cooled tube is installed, an angle steel upright post for fixing the flat steel mesh is welded on a furnace bottom plate and used as a support pillar of the flat steel mesh;
(3) cleaning: after the water-cooled tube is installed, removing residues, sundries and iron rust on the surface of the furnace bottom sealing plate and the surface of the water-cooled tube;
(4) cross center line: referring to the center of the blast furnace in the previous process, after rechecking, discharging a cross center line at the bottom of the furnace, and marking the cross center line, lines 450, 1350, 2250 and 3150 on the cooling wall by using red paint;
(5) pouring heat-resistant concrete: pouring heat-resistant concrete from two sides to the middle water-cooled tube, and vibrating by using a vibrating rod during pouring;
(6) leveling: leveling the heat-resistant concrete by using a customized scraper plate and taking the upper surface of the water-cooling pipe as a reference;
(7) flat steel mesh: after the heat-resistant concrete is solidified, welding or mounting a flat steel mesh according to the arrangement line and the elevation control line;
(8) ramming: ramming the materials in a spacing and layering way, and leveling one by using a leveling scraper;
(9) and (3) measuring elevation: and measuring, checking and confirming the surface elevation, and repairing the unqualified points.
During the description of the above description:
the description of the terms "this embodiment," "an embodiment of the invention," "as shown at … …," "further improved technical solution," etc., means 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 invention; in this specification, the schematic representations of the terms used above are not necessarily for the same embodiment or example, and the particular features, structures, materials, or characteristics described, etc., may be combined or brought together in any suitable manner in any one or more embodiments or examples; furthermore, those of ordinary skill in the art may combine or combine features of different embodiments or examples and features of different embodiments or examples described in this specification without undue conflict.
Finally, it should be noted that:
the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same;
although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes and modifications may be made, and equivalents may be substituted for elements thereof without departing from the scope of the embodiments of the present invention.
Claims (8)
1. The masonry construction method of the blast furnace body is characterized by comprising the following steps:
the method comprises the steps of cooling wall pointing → furnace bottom flat steel mesh welding and carbon ramming material leveling → furnace bottom carbon brick building → furnace bottom two-layer annular carbon building → furnace bottom three-layer ceramic cup bottom pad building → furnace hearth annular microporous carbon bricks and ceramic cups are alternately built → tuyere combined brick building → furnace belly protective shed dismantling → furnace belly and building above the furnace belly → dismantling hanging scaffold, cleaning → furnace body grouting.
2. A masonry construction method for a blast furnace body according to claim 1, characterized in that: in the step of jointing construction of the cooling wall:
cutting the sealing iron sheet with corresponding size according to the width size of the vertical seam and the circular seam and the length size of the steel brick and the cooling wall;
tightly attaching the sealing iron sheet to the back of the cooling wall, tensioning the sealing iron sheet by using a 20# iron wire and a bamboo stick, and fixing the sealing iron sheet on the front of the cooling wall;
when the cooling wall iron scrap filler is used for pointing, vertical joints are sequentially pointed and filled from bottom to top and from inside to outside layer by layer, and then circular joints are pointed and filled from inside to outside.
3. A masonry construction method for a blast furnace body according to claim 1, characterized in that: the jointing construction time of the cooling wall is as follows:
the blast furnace has the following furnace bosh: the joint pointing of the cooling wall and the installation of the cooling wall are performed in a crossed way, and the part of the work is required to be finished before the carbon brick is built;
above the blast furnace bosh: stave pointing is performed alternately with installation.
4. A masonry construction method for a blast furnace body according to claim 1, characterized in that: for the building of the furnace bottom carbon bricks, furnace bottom graphite blocks and semi-graphite blocks are built by adopting a vacuum chuck, and microporous carbon bricks are built by adopting a clamp;
discharging a cross center line built by each layer of carbon bricks on the furnace shell;
after the construction acceptance of the furnace bottom carbon ramming material leveling layer is qualified, dry coding the carbon brick numbers in corresponding positions;
finishing the placement of the wood supporting area and the carbon brick supporting area;
according to the serial number position of the carbon bricks, building the carbon bricks one by one from a building center line to one side to finish 5-6 rows, then building the carbon bricks one by one from two sides simultaneously, and driving wood wedges for fixing between two ends of each row of bricks and a cooling wall;
the carbon bricks are built by double-sided carbon oil, the carbon bricks are tightly pressed by a jack after each row of building is finished, building mortar joints are checked one by using a filler gauge, and the building requirement of the carbon bricks is that vertical joints and horizontal joints are smaller than 1 mm;
during building, tracking and detecting each carbon brick by using a level gauge so as to ensure the flatness of the surface;
after the whole layer of carbon bricks are built, the carbon ramming materials in the expansion joint between the carbon bricks and the cooling wall are rammed according to the symmetry principle, the ramming is carried out according to the sequence of laying one layer of ramming materials, the thickness of each layer of ramming materials is not more than 150mm, and the compression ratio is more than or equal to 40%;
and after the whole layer of carbon bricks are built, measuring and checking, and grinding and leveling unqualified points.
5. A masonry construction method for a blast furnace body according to claim 1, characterized in that: the circular microporous carbon bricks and ceramic cups of the hearth are alternately built, before building, a radius gauge is installed according to a determined central line, a circumferential line of the hearth is drawn according to the radius gauge, the surface of the bottom of the annular belt below the wall of the hearth is leveled, and bricks with the same length direction are selected and built in the same brick ring.
The contact surface of the firebrick of the hearth and the cooling wall is processed into an inclined surface, and when the brick joint of the contact surface is slightly large, thick slurry with the same composition as that of brickwork can be filled.
6. A masonry construction method for a blast furnace body according to claim 1, characterized in that: for the construction of the tuyere combination bricks, leveling and finishing the surface flatness and elevation of a brick layer under the tuyere combination bricks according to the average value of the center elevation actually measured by 24 tuyeres;
putting the vertical center line of the tuyere on a brick layer below the tuyere combined bricks to be used as a control line for building each group of tuyere combined bricks;
building from the radial centers of the two tuyeres to two sides, and building the outer ring bricks firstly and then building the inner ring bricks;
firstly building a lower semi-ring, mounting a middle sleeve of the tuyere after the combined bricks of the lower semi-ring are built, building the combined bricks of the upper semi-ring by using a vacuum chuck crane or a lifting appliance, and filling and tamping expansion joint materials among the large tuyere, the middle sleeve and the combined bricks;
when the upper semi-ring is built, the bricks are supported by prefabricated wood boards, the wood boards are drawn out after the door is closed, and finally gap materials are filled;
the construction of ramming mass on the back of the combined brick and the building of brick layers are alternately carried out;
and after the tuyere combined bricks are built, continuing building a plurality of layers of bricks on the upper part of the tuyere, then removing the furnace belly protective shed, and after all the bricks are removed, building two feeding tuyere combined bricks in a repairing way.
7. A masonry construction method for a blast furnace body according to claim 1, characterized in that: before the cooling wall is subjected to pointing, the installation of a protective shed and a hanging scaffold is carried out.
8. A masonry construction method for a blast furnace body according to claim 1, characterized in that: the method specifically comprises the following steps of welding a furnace bottom flat steel mesh and leveling a carbon ramming material:
(1) and (3) measurement and paying-off: taking the cross center lines of the bottom and the hearth of the blast furnace as the basis, discharging the arrangement line of the flat steel mesh of the leveling layer, calculating the top surface elevation of the discharged bottom carbon ramming material by taking the average elevation of the center of the taphole as the reference, and marking the top surface elevation on the cooling wall by using red paint;
(2) mounting a support column: before the water-cooled tube is installed, an angle steel upright post for fixing the flat steel mesh is welded on a furnace bottom plate and used as a support pillar of the flat steel mesh;
(3) cleaning: after the water-cooled tube is installed, removing residues, sundries and iron rust on the surface of the furnace bottom sealing plate and the surface of the water-cooled tube;
(4) cross center line: referring to the center of the blast furnace in the previous process, after rechecking, discharging a cross center line at the bottom of the furnace, and marking the cross center line, lines 450, 1350, 2250 and 3150 on the cooling wall by using red paint;
(5) pouring heat-resistant concrete: pouring heat-resistant concrete from two sides to the middle water-cooled tube, and vibrating by using a vibrating rod during pouring;
(6) leveling: leveling the heat-resistant concrete by using a customized scraper plate and taking the upper surface of the water-cooling pipe as a reference;
(7) flat steel mesh: after the heat-resistant concrete is solidified, welding or mounting a flat steel mesh according to the arrangement line and the elevation control line;
(8) ramming: ramming the materials in a spacing and layering way, and leveling one by using a leveling scraper;
(9) and (3) measuring elevation: and measuring, checking and confirming the surface elevation, and repairing the unqualified points.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807476A (en) * | 2022-04-29 | 2022-07-29 | 新余钢铁股份有限公司 | Repair process for blast furnace hearth |
| CN115181823A (en) * | 2022-07-08 | 2022-10-14 | 山西太钢不锈钢股份有限公司 | Quantitative construction method for carbon ramming material of blast furnace hearth |
| CN115305099A (en) * | 2022-08-04 | 2022-11-08 | 中国一冶集团有限公司 | Coke oven body masonry system |
-
2021
- 2021-09-30 CN CN202111161005.9A patent/CN113846198A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807476A (en) * | 2022-04-29 | 2022-07-29 | 新余钢铁股份有限公司 | Repair process for blast furnace hearth |
| CN114807476B (en) * | 2022-04-29 | 2023-11-24 | 新余钢铁股份有限公司 | Repairing process for blast furnace hearth |
| CN115181823A (en) * | 2022-07-08 | 2022-10-14 | 山西太钢不锈钢股份有限公司 | Quantitative construction method for carbon ramming material of blast furnace hearth |
| CN115305099A (en) * | 2022-08-04 | 2022-11-08 | 中国一冶集团有限公司 | Coke oven body masonry system |
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