CN114032346B - Modular construction method for furnace bottom plate of MPR furnace - Google Patents
Modular construction method for furnace bottom plate of MPR furnace Download PDFInfo
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- CN114032346B CN114032346B CN202111366380.7A CN202111366380A CN114032346B CN 114032346 B CN114032346 B CN 114032346B CN 202111366380 A CN202111366380 A CN 202111366380A CN 114032346 B CN114032346 B CN 114032346B
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- furnace bottom
- bottom plate
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
- B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a modular construction method for a furnace bottom plate of an MPR furnace, belonging to the technical field of construction of smelting reduction equipment, and the modular construction method for the furnace bottom plate of the MPR furnace comprises the following steps: positioning and paying off, namely measuring and paying off a foundation plane according to a construction drawing; mounting a sizing block, and leveling a base plane through the sizing block; welding a furnace bottom plate and a furnace bottom beam, turning the furnace bottom plate, and welding a lifting lug on the front side of the furnace bottom plate by turning the furnace bottom plate; and hoisting the furnace bottom plate, hoisting the furnace bottom plate to a mounting position by a crane, and fixing the furnace bottom beam and the slurry seat plate by spot welding. The MPR furnace bottom plate modularization construction method solves the technical problems that the traditional blast furnace bottom plate technology of the same type is complex in operation, low in installation efficiency, large in field construction difficulty, time-consuming and labor-consuming, and the quality is difficult to effectively guarantee, is simple to operate, high in construction efficiency, guaranteed in quality, and suitable for field construction.
Description
Technical Field
The invention relates to the technical field of construction of smelting reduction equipment, in particular to a modular construction method for a furnace bottom plate of an MPR furnace.
Background
The MPR furnace is an iron bath melting reduction furnace directly using fine ores and pulverized coals, does not use coke, does not need to build a coke furnace and a chemical facility, does not build a sintering facility when using lump ores and partial pellet ores, reduces a large pollution source, creates good ecological environment conditions for realizing clean production of steel plants and reducing environmental pollution, and is widely applied to a melting iron-making process at present.
Disclosure of Invention
The invention aims to solve the technical problems of complex process operation, low installation efficiency, high field construction difficulty, time and labor waste and difficulty in effectively ensuring the quality of the traditional blast furnace bottom plate installation method, thereby providing the modular construction method of the MPR furnace bottom plate, which has the advantages of simple operation, high construction efficiency and guaranteed quality and is suitable for field construction.
The invention solves the problems and adopts the technical scheme that:
a modular construction method for a furnace bottom plate of an MPR furnace comprises the following steps:
s1, positioning and paying-off: measuring and paying off a foundation plane according to a construction drawing, and marking out a construction positioning parameter standard;
s2, mounting a sizing block: leveling a base plane by installing a sizing block according to the construction positioning parameter standard in the S1 to ensure the uniform transfer of the weight of the MPR furnace;
s3, welding the furnace bottom plate and the furnace bottom beam: assembling and welding the furnace bottom plate in blocks according to construction drawings, and installing and welding and fixing the furnace bottom Liang Daozhi at the bottom side of the furnace bottom plate;
s4, overturning a furnace bottom plate: turning the furnace bottom plate by a certain angle, and welding a plurality of lifting lugs on the front surface of the furnace bottom plate;
s5, hoisting a furnace bottom plate: and the lifting lugs are tied by steel wire ropes, the furnace bottom plate is lifted by a crane to a mounting position, and the furnace bottom beam and the slurry seat plate are fixed by spot welding.
Compared with the prior art, the invention adopting the technical scheme has the prominent characteristics that:
the invention provides a modular construction method of a furnace bottom plate of an MPR furnace, which solves the technical problems of complex process, low installation efficiency, high difficulty in site construction, time and labor waste and difficulty in effectively ensuring the quality of the traditional furnace bottom plates of the same type of blast furnaces by positioning and paying off, sizing block installation, welding of the furnace bottom plate and a furnace bottom beam, furnace bottom plate overturning and furnace bottom plate hoisting.
Preferably, the invention further comprises:
the construction positioning parameter standard in the S1 comprises a center line, an edge positioning line and an elevation of a foundation plane.
The S2 comprises the following specific steps:
s21, adding a cushion iron according to the actual elevation of the base plane for leveling, and controlling the tolerance range of the actual elevation;
s22, an Zhuanglu bottom beams, laying sizing blocks below the bottom beams, leveling by using the sizing blocks, and combining each group of sizing blocks by using steel plates with different thicknesses according to the actually measured elevation;
s23, spot welding positioning is carried out between the sizing block and the furnace bottom beam, and uniform transfer of the weight of the MPR furnace is guaranteed.
The actual elevation tolerance range of the control in the S21 is +/-3 mm, the sizing block adopts flat iron, and the size of the flat iron is 600 x 300mm in length and width.
The S3 comprises the following specific steps:
s31, assembling the furnace bottom plate blocks according to a construction drawing, wherein the front surface of the furnace bottom plate faces upwards during assembling;
s32, welding the front side of the furnace bottom plate, and then overturning the furnace bottom plate to weld the bottom side of the furnace bottom plate;
s33, marking a positioning line of the furnace bottom beam on the welded furnace bottom plate;
s34, inversely installing the blocked furnace bottom Liang Zhuyi on the bottom surface side of the furnace bottom plate and welding and fixing.
The front surface of the furnace bottom plate in the S31 is a surface with a groove on the arc edge of the furnace bottom plate, and the welding seam of the furnace bottom beam and the furnace bottom plate in the S34 is vertically arranged.
And in the S4, the overturning angle of the furnace bottom plate is 180 degrees, and the number of the lifting lugs is 4.
Drawings
FIG. 1 is a schematic view of the layout of the sizing block of the present invention;
FIG. 2a is a schematic view of the structure of a furnace floor block of the present invention;
FIG. 2b is a schematic structural view of the front side of the assembled furnace bottom plate according to the present invention;
FIG. 3 is a schematic view of the bottom side of the oven floor according to the present invention;
FIG. 4 is a schematic view of the installation of the hearth beam of the present invention;
FIG. 5 is a schematic view of the arrangement of lifting lugs on the hearth plate of the present invention;
FIG. 6 is a schematic view of the lifting of the furnace floor of the present invention.
Labeled as: a sizing block 1; a furnace floor 2; a furnace bottom beam 3; a splicing welding seam 4 of the furnace bottom plate; welding seams 5 between the furnace bottom plate and the furnace bottom beam; a lifting lug 6; a wire rope 7; a hook 8.
Detailed Description
The invention will be further described with reference to the following examples, which are included merely for the purpose of illustration and are not intended to limit the scope of the invention.
FIG. 1 shows a schematic layout of the back iron of the present invention; fig. 2 shows a structural schematic diagram of the furnace bottom plate assembly of the invention.
The invention provides a modular construction method for a furnace bottom plate of an MPR furnace, which specifically comprises the following steps:
s1, positioning and paying-off: measuring and paying off a foundation plane according to a construction drawing, and marking out a construction positioning parameter standard; the construction positioning parameter standards comprise a center line of a foundation plane, an edge positioning line, a mark and the like.
S2, mounting a sizing block: and leveling a base plane by installing a sizing block according to the construction positioning parameter standard in the S1, so that the weight of the MPR furnace is uniformly transferred.
Wherein, S2 comprises the following specific steps:
s21, according to the actual elevation of the basic plane, adding a sizing block 1 for leveling, and controlling the tolerance range of the actual elevation; the tolerance range of the actual elevation is strictly controlled to be +/-3 mm.
And S22, installing the furnace bottom beams 3, paving the sizing blocks 1 below the furnace bottom beams 3, leveling by using the sizing blocks 1, and combining the sizing blocks 1 in each group by using steel plates with different thicknesses according to the difference of actually measured heights so as to ensure that the elevation of the top surfaces of the sizing blocks meets the design and standard requirements. The arrangement of the sizing blocks 1 on the furnace bottom beam 3 is shown in figure 1; wherein, parallels 1 adopts the flat iron, and the size of the flat iron is 600 with 300mm wide.
And S23, positioning welding is carried out after the arrangement of the sizing blocks 1 is finished, and spot welding positioning is carried out between the sizing blocks 1 and the furnace bottom beam 3 after the furnace bottom beam 3 is installed, so that the sizing blocks 1 are prevented from moving due to collision. According to the characteristics of the MPR furnace bottom structure, the weight of the whole MPR furnace is ensured to be uniformly transferred.
FIG. 2a is a schematic view of the structure of a furnace floor block of the present invention; FIG. 2b is a schematic structural view of the front side of the assembled furnace bottom plate according to the present invention; FIG. 3 is a schematic view showing the structure of the bottom surface side of the oven floor according to the present invention; fig. 4 shows a schematic view of the installation of the inventive furnace bottom beam.
S3, welding the furnace bottom plate 2 and the furnace bottom beam 3: and (3) assembling and welding the furnace bottom plate 2 in blocks according to a construction drawing, and then inversely installing the furnace bottom beam 3 on the bottom surface side of the furnace bottom plate 2 and welding and fixing.
S3, the method comprises the following specific steps:
s31, assembling the furnace bottom plate 2 in blocks according to a construction drawing as shown in a figure 2a, wherein in the figure 2a, the furnace bottom plate 2 is assembled in blocks, and the front surface of the furnace bottom plate 2 is upward during assembling; wherein, the front surface of the furnace bottom plate in S31 refers to a surface with a groove at the arc edge of the furnace bottom plate 2, and the structural schematic diagram of the front surface of the furnace bottom plate after being assembled is shown in fig. 2 b.
S32, welding the front side of the furnace bottom plate, and then overturning and welding the furnace bottom plate 2 to the bottom side of the furnace bottom plate 2; the bottom surface side of the furnace floor 2 is welded, and the splice weld 4 of the furnace floor 2 after welding is specifically shown in fig. 3.
S33, marking a positioning line of the furnace bottom beam 3 on the welded furnace bottom plate 2;
and S34, inversely installing the blocked furnace bottom beams 3 on the bottom side of the furnace bottom plate 2 one by one, and welding and fixing the furnace bottom beams, wherein the furnace bottom beams are vertically arranged with the welding seams 5 of the furnace bottom plate.
FIG. 5 is a schematic view showing the arrangement of lifting lugs on the hearth plate of the furnace of the present invention; fig. 6 shows a schematic view of the lifting of the furnace floor according to the invention.
S4, overturning a furnace bottom plate: turning the furnace bottom plate 2 by a certain angle, and welding a plurality of lifting lugs on the front surface of the furnace bottom plate 2; and S4, the overturning angle of the furnace bottom plate 2 is 180 degrees, and the number of the lifting lugs 6 is 4. 4 lifting lugs 6 are welded on the front surface of the furnace bottom plate 2, and the arrangement of the lifting lugs 6 on the furnace bottom plate 2 is specifically shown in FIG. 5.
S5, hoisting a furnace bottom plate: in a specific embodiment, 4 lifting lugs are respectively tied by a snap ring matched with a steel wire rope 7, and after a crane lifts the steel wire rope 7 through a lifting hook 8 so as to lift the furnace bottom plate 2 to a mounting position, namely a mortar board position, the furnace bottom beam 3 and the mortar board are fixed by spot welding as shown in fig. 6.
The invention provides a modular construction method of a furnace bottom plate of an MPR furnace, which solves the technical problems of complex operation, low installation efficiency, large field construction difficulty, time and labor waste and difficult quality guarantee of the traditional furnace bottom plate of the same type of blast furnace through positioning and paying off, sizing block installation, welding of the furnace bottom plate and a furnace bottom beam, furnace bottom plate overturning and furnace bottom plate hoisting.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (5)
1. The modular construction method for the furnace bottom plate of the MPR furnace is characterized by comprising the following steps:
s1, positioning and paying-off: measuring and setting out a foundation plane according to a construction drawing, and marking out a construction positioning parameter standard;
s2, mounting a sizing block: leveling a base plane by installing a sizing block according to the construction positioning parameter standard in the S1, and ensuring the uniform transmission of the weight of the MPR furnace;
s3, welding the furnace bottom plate and the furnace bottom beam: assembling and welding the furnace bottom plate in blocks according to construction drawings, and installing and welding and fixing the furnace bottom Liang Daozhi at the bottom side of the furnace bottom plate;
s4, overturning a furnace bottom plate: turning the furnace bottom plate by a certain angle, and welding a plurality of lifting lugs on the front surface of the furnace bottom plate;
s5, hoisting a furnace bottom plate: the lifting lugs are tied by steel wire ropes, the furnace bottom plate is lifted by a crane to an installation position, and the furnace bottom beam and the slurry seat plate are fixed in a spot welding manner;
the S2 comprises the following specific steps:
s21, adding iron pads for leveling according to the actual elevation of the base plane, and controlling the tolerance range of the actual elevation;
s22, an Zhuanglu bottom beams, laying sizing blocks below the bottom beams, leveling by using the sizing blocks, and combining each group of sizing blocks by using steel plates with different thicknesses according to the actually measured elevation;
s23, spot welding positioning is carried out between the sizing block and the furnace bottom beam, and uniform transmission of the weight of the MPR furnace is guaranteed
The S3 comprises the following specific steps:
s31, assembling the furnace bottom plate blocks according to construction drawings, wherein the front surface of the furnace bottom plate faces upwards during assembling;
s32, welding the front side of the furnace bottom plate, and then overturning the furnace bottom plate to weld the bottom side of the furnace bottom plate;
s33, marking a positioning line of the furnace bottom beam on the welded furnace bottom plate;
s34, inversely installing the blocked furnace bottom Liang Zhuyi on the bottom surface side of the furnace bottom plate and welding and fixing.
2. The MPR furnace floor modular construction method of claim 1, wherein the construction positioning parameter criteria in S1 include a center line of a base plane, an edge positioning line and an elevation.
3. The MPR furnace floor modular construction method of claim 1, wherein the actual elevation tolerance of the control in S21 is ± 3mm, the sizing block is flat iron, and the size of the flat iron is 600 x 300mm in length and width.
4. The MPR furnace hearth modular construction method of claim 1, wherein the front surface of the furnace hearth in the S31 is a surface with a groove on the arc edge of the furnace hearth, and the furnace bottom beams in the S34 are arranged perpendicular to the welding line of the furnace hearth.
5. The MPR furnace hearth plate modular construction method of claim 1, wherein the furnace hearth plate in S4 is turned over at an angle of 180 °, and the number of the lifting lugs is 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111366380.7A CN114032346B (en) | 2021-11-18 | 2021-11-18 | Modular construction method for furnace bottom plate of MPR furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111366380.7A CN114032346B (en) | 2021-11-18 | 2021-11-18 | Modular construction method for furnace bottom plate of MPR furnace |
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| CN114032346A CN114032346A (en) | 2022-02-11 |
| CN114032346B true CN114032346B (en) | 2023-01-20 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10212511A (en) * | 1997-01-29 | 1998-08-11 | Sumitomo Metal Ind Ltd | Method for laying brick on furnace bottom of blast furnace |
| CN104976894A (en) * | 2014-04-04 | 2015-10-14 | 中国石化工程建设有限公司 | Integral modular structure of industrial furnace and construction method |
| CN105238896A (en) * | 2015-11-10 | 2016-01-13 | 马鞍山钢铁股份有限公司 | Pressing system restraining blast furnace hearth plate from warping upwards and application thereof |
| CN109576429A (en) * | 2018-12-17 | 2019-04-05 | 中国十七冶集团有限公司 | A kind of accurate centering construction method of hot wind drop-bottom reinforcing strip |
-
2021
- 2021-11-18 CN CN202111366380.7A patent/CN114032346B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10212511A (en) * | 1997-01-29 | 1998-08-11 | Sumitomo Metal Ind Ltd | Method for laying brick on furnace bottom of blast furnace |
| CN104976894A (en) * | 2014-04-04 | 2015-10-14 | 中国石化工程建设有限公司 | Integral modular structure of industrial furnace and construction method |
| CN105238896A (en) * | 2015-11-10 | 2016-01-13 | 马鞍山钢铁股份有限公司 | Pressing system restraining blast furnace hearth plate from warping upwards and application thereof |
| CN109576429A (en) * | 2018-12-17 | 2019-04-05 | 中国十七冶集团有限公司 | A kind of accurate centering construction method of hot wind drop-bottom reinforcing strip |
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| CN114032346A (en) | 2022-02-11 |
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