CN117887927A - Bottom blowing air supply element brick protection and masonry method for semisteel smelting converter - Google Patents
Bottom blowing air supply element brick protection and masonry method for semisteel smelting converter Download PDFInfo
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- CN117887927A CN117887927A CN202410037683.1A CN202410037683A CN117887927A CN 117887927 A CN117887927 A CN 117887927A CN 202410037683 A CN202410037683 A CN 202410037683A CN 117887927 A CN117887927 A CN 117887927A
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- brick
- protection
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- permanent
- supply element
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- 239000011449 brick Substances 0.000 title claims abstract description 326
- 238000007664 blowing Methods 0.000 title claims abstract description 88
- 238000003723 Smelting Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000001681 protective effect Effects 0.000 claims abstract description 49
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 70
- 239000000395 magnesium oxide Substances 0.000 claims description 35
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 12
- 238000013461 design Methods 0.000 description 8
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000001095 magnesium carbonate Substances 0.000 description 4
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 4
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 4
- 235000014380 magnesium carbonate Nutrition 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005502 peroxidation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
- C21C5/441—Equipment used for making or repairing linings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides a bottom blowing air supply element brick protection and a masonry method for a semisteel smelting converter, which comprises a working layer brick protection, a protective sleeve brick and a permanent layer brick protection, wherein the permanent layer brick protection is arranged on a furnace shell; the middle part of the working layer brick is provided with a first through hole, the middle part of the permanent layer brick is provided with a second through hole, the middle part of the furnace shell is provided with a third through hole, the first through hole, the second through hole and the third through hole are coaxially communicated to form a mounting hole, the bottom blowing air supply element is inserted into the mounting hole from the lower part, and the top of the bottom blowing air supply element penetrates out of the first through hole. The invention can realize the fit of the working permanent layer protection brick and the furnace bottom permanent layer, the working layer protection brick and the protection sleeve brick, and the protection sleeve brick and the furnace bottom working layer, and the bottom blowing air supply element, the protection brick and the converter are built by optimizing the installation sequence, thereby providing good basic conditions for the efficient and long-service-life combined blowing smelting of the converter.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a bottom blowing air supply element brick protection and masonry method for a semisteel smelting converter.
Background
Compared with a top-blown converter, the inert gas is blown into the bottom of the combined-blown converter in the smelting process, so that the dynamic conditions of a converter molten pool are greatly optimized, the temperature and the components in the converter smelting process are more uniform, and the smelting with low iron loss, low oxidability, high efficiency and high cleanliness of the converter is further promoted, so that the converter smelting is greatly changed.
The semisteel after vanadium extraction, dephosphorization or chromium removal of the molten iron has the problems of low silicon-manganese content, less slag quantity, low heat, relatively serious peroxidation and the like, and the TFe content in the terminal slag is higher, so that higher requirements are provided for maintenance of a bottom blowing air supply element in the combined blowing of the converter.
The reasonable installation of the converter bottom blowing air supply element is a precondition for ensuring the combined blowing effect of the converter, the converter air supply element is mostly a pipe type or an air brick type, the protection bricks of the pipe type air supply element are divided into an upper protection brick and a lower protection brick, and the protection bricks of the air brick type air supply element are divided into a core brick and an outer cover brick.
The problems of the traditional design of the upper protection brick of the tubular air supply element are as follows: setting the number of rings occupied by the annular protective sleeve bricks as Z, when Z=1, the upper protective bricks are smaller in size and weak in protective force, and the problems of cracking of the part higher than the height of the working layer of the furnace bottom and the like can occur in the processes of baking and hot testing; when Z is greater than 1, the upper protection brick is larger in size, lifting and installation are more troublesome in the masonry process, and the central opening is smaller, so that the problems of bending of the bottom blowing pipe type air supply element and the like are easy to occur.
The brick protection of the traditional air brick type air supply element has the advantages that the air supply element needs to penetrate through the working layer and the permanent layer, the core brick and the outer sleeve brick are of through type design and installation, namely, the core brick and the sleeve brick penetrate through the working layer and the permanent layer, through gaps are formed among the core brick, the sleeve brick and the bottom brick from top to bottom, the risk of steel leakage exists, and the great risk is brought to converter smelting;
through the analysis, the design of the tubular air supply element and the air brick type air supply element and the protection brick at present can not meet the requirements of higher masonry and maintenance of a bottom blast hole in the smelting process of the semisteel converter. The problems that the air supply element is not consistent with the brick cup in melting loss or melting corrosion, so that the air brick cup is seriously corroded, and the brick is dropped off from the working layer or the permanent layer of protection brick is dropped easily occur, and a novel bottom blowing air supply element protection brick and a novel building method are required to be designed.
At present, no related air supply element brick protection design and masonry related technology or patent literature exists.
Disclosure of Invention
According to the technical problems, the bottom blowing air supply element brick protection and the construction method for the semisteel smelting converter are provided. According to the invention, the bottom blowing air supply element protection bricks are designed into permanent layer protection bricks, working layer protection bricks and protection sleeve bricks, the working permanent layer protection bricks and the furnace bottom permanent layer, the working layer protection bricks and the protection sleeve bricks and the furnace bottom working layer are matched through the shape and size design of each part, and the bottom blowing air supply elements, the protection bricks and the converter are built through optimizing the installation sequence, so that the installation of the bottom blowing air supply elements and the protection bricks in the converter building process is realized, and good basic conditions are provided for the efficient long-service life combined blowing smelting of the converter.
The invention adopts the following technical means:
a bottom blowing air supply element brick for a semisteel smelting converter, comprising: the furnace comprises a working layer protection brick, a protection sleeve brick and a permanent layer protection brick, wherein the permanent layer protection brick is arranged on the upper surface of a furnace shell, the working layer protection brick is arranged on the upper surface of the permanent layer protection brick, the protection sleeve brick is sleeved outside the working layer protection brick, and the protection sleeve brick is arranged on the upper surface of the permanent layer protection brick; the middle part of the working layer protection brick is provided with a first through hole, the middle part of the permanent layer protection brick is provided with a second through hole, the middle part of the furnace shell is provided with a third through hole, the first through hole, the second through hole and the third through hole are coaxially communicated to form a mounting hole, a bottom blowing air supply element is inserted into the mounting hole from the lower part, and the top of the bottom blowing air supply element penetrates through the first through hole.
Further, at least one layer of furnace bottom working layer brick is sleeved outside the protective sleeve brick, and the furnace bottom working layer brick is arranged on the upper surface of the permanent layer protective brick.
Further, a plurality of layers of permanent layer-burned magnesia bricks are circumferentially arranged outside the permanent layer-burned magnesia bricks, the permanent layer-burned magnesia bricks are arranged between the furnace bottom working layer bricks and the furnace shell, and the plurality of layers of permanent layer-burned magnesia bricks are arranged in an up-down superposition manner.
Further, the upper and lower end surfaces of the permanent layer protection brick are L in length 1 Is square with height H Permanent magnet The radius of the second through hole is R Permanent magnet ；
The working layer brick is in a truncated cone structure, and the height is H Worker's work The radius of the upper end surface is R 1 Radius of lower end face is R 2 The radius of the first through hole is R Worker's work ；
The height of the protective sleeve brick is H Protection device The end face is trapezoid, the upper end face is L with inner side length 2 in The outer side length is L 2 outside of The height is h Upper part The lower end face is trapezoid with the inner side length L 3 in The outer side length is L 3 outside The height is h Lower part(s) Is a trapezoid of (a).
Further, the length L of the upper end face and the lower end face of the permanent layer protection brick 1 =200 to 300mm, height H Permanent magnet H is the layer height of the furnace bottom permanent layer-baked magnesia brick, and n is the layer number of the permanent layer-baked magnesia brick; radius R of the second through hole Permanent magnet R+2, R is the outer diameter of the bottom-blowing air supply element;
height H of the working layer brick Worker's work H+50 to H+100mm, H is the height of the furnace bottom working layer brick, and the radius of the upper end face is R 1 =40 to 50mm, the radius of the lower end surface is R 2 ＝R 1 +2mm; the radius of the first through hole is R Worker's work ＝R+1；
Height H of the protective sleeve brick Protection device =h+50 to h+100mm, the inner side length of the upper end face is L 2 in ＝Z×l 2 in The outer side length is L 2 outside of ＝Z×l 2 in The height is h Upper part ＝Z×h On rings The method comprises the steps of carrying out a first treatment on the surface of the The inner side length of the lower end face is L 3 in ＝Z×l 3 in The outer side length is L 3 outside ＝Z×l 3 in The height is h Lower part(s) ＝Z×h Under the ring The method comprises the steps of carrying out a first treatment on the surface of the Z is the number of rings occupied by the protective sleeve bricks, Z=2-4, l 2 in Is an upper end face L 2 in The inner side length of the brick protection layer of the annular furnace bottom working layer where the side is located is l 2 outside of Is an upper end face L 2 outside of The outer edge of the brick is longer than the outer edge of the working layer protection brick of the furnace bottom where the edge is positioned, l 3 in Is the lower end face L 3 in The inner side length of the brick protection layer of the annular furnace bottom working layer where the side is located is l 3 outside Is the lower end face L 3 outside The edge is positioned at the outer edge of the brick protection layer of the ring furnace bottom working layer; h Worker's work ≥H Protection device 。
Further, the bottom blowing air supply element is a circular seam type, a branch pipe type or a sleeve type.
The invention also provides a building method of the bottom blowing air supply element brick for the semisteel smelting converter, wherein the building sequence of the bottom blowing air supply element, the brick and the converter is as follows:
s1, inserting a bottom blowing air supply element into a third through hole of the furnace shell and fixing the bottom blowing air supply element;
s2, mounting the permanent layer protection bricks on the upper surface of the furnace shell, and penetrating the bottom blowing air supply element through a second through hole;
s3, mounting the working layer protection bricks on the upper surfaces of the permanent layer protection bricks, and penetrating the bottom blowing air supply element through the first through holes;
s4, mounting the furnace bottom permanent layer burned magnesia bricks on the upper surface of the furnace shell, and arranging the furnace bottom permanent layer burned magnesia bricks around the outer part of the permanent layer burned magnesia bricks;
s5, mounting the protective sleeve brick on the upper surface of the permanent layer protective brick and sleeving the protective sleeve brick outside the working layer protective brick;
s6, mounting the furnace bottom working layer bricks on the upper surfaces of the permanent layer protection bricks and the permanent layer burned magnesia bricks, and sleeving the permanent layer protection bricks outside the protection bricks;
s7, filling gaps with magnesia after the furnace bottom is built.
Further, the gap between the permanent layer burned magnesia brick and the permanent layer protecting brick is less than 3mm, and the gap is filled with magnesia.
Further, the distance between the protective sleeve brick and the furnace bottom working layer brick is less than or equal to 1mm; the distance between two adjacent bricks of the furnace bottom working layer is less than or equal to 2mm.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the bottom blowing air supply element protection bricks are designed into permanent layer protection bricks, working layer protection bricks and protection sleeve bricks, the working permanent layer protection bricks and the furnace bottom permanent layer, the working layer protection bricks and the protection sleeve bricks and the furnace bottom working layer are matched through the shape and size design of each part, and the bottom blowing air supply elements, the protection bricks and the converter are built through optimizing the installation sequence, so that the installation of the bottom blowing air supply elements and the protection bricks in the converter building process is realized, and good basic conditions are provided for the efficient long-service life combined blowing smelting of the converter.
2. After the air brick protection brick, the working layer protection brick, the protective sleeve brick cup and the permanent layer protection brick designed by adopting the scheme of the invention are assembled and built according to the flow, the air brick of the converter has no air leakage and steel leakage in the whole furnace, the full-furnace-service combined blowing is realized, the combined blowing service life is 8400, the bottom blowing effect of the converter is stable, the economic and technical indexes and the quality indexes are improved to some extent, the melting loss of the air brick and the brick cup is serious, and the problem of unstable melting corrosion is improved.
Based on the reasons, the invention can be widely popularized in the fields of combined blown converter smelting and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic view of a bottom blowing air supply element and brick protection masonry of the present invention.
Fig. 2 is a schematic view of a bottom blowing air supply element according to the present invention.
FIG. 3 is a schematic view of a permanent layer tile of the present invention.
FIG. 4 is a schematic view of a working layer tile of the present invention.
Fig. 5 is a schematic view of a protective sleeve brick of the present invention.
In the figure: 1. a bottom blowing air supply element; 2. brick protection of working layer; 3. protecting the brick; 4. bricks of a furnace bottom working layer; 5. permanent layer protection bricks; 6. permanently layer-firing the magnesia bricks; 7. a furnace shell.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The purpose of the invention is that: the invention relates to a bottom blowing air supply element brick and a masonry method for semisteel converter smelting, wherein the bottom blowing air supply element brick is designed into a permanent layer brick, a working layer brick and a protective sleeve brick, the shapes and the sizes of all parts are designed to realize the fit of the working permanent layer brick and a furnace bottom permanent layer, the working layer brick and the protective sleeve brick, and the protective sleeve brick and the furnace bottom working layer, and the bottom blowing air supply element brick and the masonry of a converter are completed through optimizing the mounting sequence, so that the bottom blowing air supply element brick and the protective brick are mounted in the converter masonry process, and good foundation conditions are provided for the efficient and long-service-life combined blowing smelting of the converter.
The schematic construction diagrams of the bottom blowing air supply element, the converter shell, the permanent layer, the working layer and the brick protection are shown in fig. 1-5.
According to the bottom blowing air supply element brick and the building method for the semisteel converter smelting, the bottom blowing air supply element brick is designed to be a permanent layer brick, a working layer brick and a protective sleeve brick, the shapes and the sizes of all parts are designed, the fit of the working permanent layer brick and a furnace bottom permanent layer, the working layer brick and the protective sleeve brick, and the protective sleeve brick and the furnace bottom working layer is realized, the bottom blowing air supply element, the protective bricks and the converter are built through optimizing the installation sequence, and then the installation of the bottom blowing air supply element and the protective bricks in the converter building process is realized.
The bottom blowing air supply element brick for semisteel converter smelting comprises: the working layer protection bricks 2, the protection bricks 3 and the permanent layer protection bricks 5, wherein the permanent layer protection bricks 5 are arranged on the upper surface of the furnace shell 7, the working layer protection bricks 2 are arranged on the upper surface of the permanent layer protection bricks 5, the protection bricks 3 are sleeved outside the working layer protection bricks 2, and the protection bricks 3 are arranged on the upper surface of the permanent layer protection bricks 5; the middle part of the working layer brick 2 is provided with a first through hole, the middle part of the permanent layer brick 5 is provided with a second through hole, the middle part of the furnace shell 7 is provided with a third through hole, the first through hole, the second through hole and the third through hole are coaxially communicated to form a mounting hole, the bottom blowing air supply element 1 is inserted into the mounting hole from below (the third through hole, the second through hole and the first through hole are sequentially penetrated from bottom to top), and the top of the bottom blowing air supply element 1 penetrates out of the first through hole. At least one layer of furnace bottom working layer bricks 4 is sleeved outside the protective sleeve bricks 3, and the furnace bottom working layer bricks 4 are arranged on the upper surfaces of the permanent layer protective bricks 5. The outer circumference of the permanent layer protection bricks 5 is provided with a plurality of layers of permanent layer burned magnesia bricks 6, the permanent layer burned magnesia bricks 6 are arranged between the furnace bottom working layer bricks 4 and the furnace shell 7, and the permanent layer burned magnesia bricks 6 are arranged in an up-down superposition way.
As a preferred embodiment, the permanent layer protection brick, the working layer protection brick and the protection sleeve brick are respectively designed as follows:
the upper and lower end faces of the permanent layer protection brick 5 are L in length 1 Is square with height H Permanent magnet The radius of the middle air supply element channel (the second through hole) is R Permanent magnet ；
The working layer brick 2 is in a round table structure and has a height H Worker's work The radius of the upper end surface is R 1 Radius of lower end face is R 2 The radius of the middle air supply element channel (the first through hole) is R Worker's work ；
The height of the protective sleeve brick 3 is H Protection device The end face is trapezoid, the upper end face is L in inner side length 2 in The outer side length is L 2 outside of The height is h Upper part The lower end face is trapezoid with the inner side length L 3 in The outer side length is L 3 outside The height is h Lower part(s) Is a trapezoid of (a).
As a preferred embodiment, the dimensions of the permanent layer tile, the working layer tile and the protective sleeve tile are respectively:
permanent layer protection brick 5: length L of upper and lower end surfaces 1 =200 to 300mm, height H Permanent magnet H is the layer height of the furnace bottom permanent layer-baked magnesia brick, and n is the layer number of the permanent layer-baked magnesia brick; r of the second through hole Permanent magnet R+2, R is the outer diameter of the bottom-blowing air supply element; the upper and lower surfaces of the permanent layer brick 5 are square, and the length of the upper and lower surfaces is set to take the length into considerationDegree L 1 >L of protective sleeve brick 3 3 in/out The protective sleeve brick 3 is supported completely and the outer furnace bottom permanent layer brick is also supported. The calculation method is L 1 >Z×l 3 in/out Z is the number of occupied rings 2, L 3 in/out Taking 70-200 mm, namely, the permanent layer brick 5 is at least provided with 1 permanent layer brick on both sides on the basis of being provided with the brick. Z needs to be at least 3 to ensure the support of the furnace bottom permanent layer, so the calculated value needs to be increased properly on the basis of 210 mm. Therefore, the length of the upper and lower end faces is set to be 200-300mm.
Working layer brick 2: height H Worker's work H+ (50-100 mm), H is the height of the furnace bottom working layer brick, and the radius of the upper end face is R 1 =40 to 50mm, the radius of the lower end surface is R 2 ＝R 1 +2mm; the radius of the first through hole is R Worker's work =r+1; the height of the working layer brick protection 2 is set to be more than 50mm of positive deviation of the furnace bottom height H, and the protection of the air brick core is considered; r is R 1 The area of the pit caused by the water hammer of the air brick is guaranteed to be 40-50 mm, the small protective sleeve brick 3 is easy to erode, and the manufacturing difficulty is high and the cost is high if the protective sleeve brick is too much. Radius of perforation R 2 ＝R 1 +2mm is a set of elements considering the air brick core (bottom blowing air supply element 1) when installed, with a small amount of upward adjustment space and magnesia filling. First through hole R Worker's work The expression r+1 is to ensure the precise combination of the bottom blowing gas supply element 1 at the bottom of the furnace, and the refractory will not expand and crack when the sintering is increased.
Protective sleeve brick 3: height H Protection device H+ (50-100 mm), the inner side length of the upper end face is L 2 in ＝Z×l 2 in The outer side length is L 2 outside of ＝Z×l 2 in The height is h Upper part ＝Z×h On rings The method comprises the steps of carrying out a first treatment on the surface of the The inner side length of the lower end face is L 3 in ＝Z×l 3 in The outer side length is L 3 outside ＝Z×l 3 in The height is h Lower part(s) ＝Z×h Under the ring The method comprises the steps of carrying out a first treatment on the surface of the Z is the number of rings occupied by the protective sleeve bricks, Z=2-4, l 2 in Is an upper end face L 2 in The inner side length of the brick protection layer of the annular furnace bottom working layer where the side is located is l 2 outside of Is an upper end face L 2 outside of The outer edge of the brick is longer than the outer edge of the working layer protection brick of the furnace bottom where the edge is positioned, l 3 in Is a lower end surfaceL 3 in The inner side length of the brick protection layer of the annular furnace bottom working layer where the side is located is l 3 outside Is the lower end face L 3 outside The edge is positioned at the outer edge of the brick protection layer of the ring furnace bottom working layer; h Worker's work ≥H Protection device . H of protective sleeve brick 3 Protection device The positive deviation of the furnace bottom height H is more than 50mm, and the protection of the air brick core (bottom blowing air supply element 1) is considered, when the furnace body refractory is built and the furnace slag flows back, the H is used for Protection device 、H Worker's work The height is higher than H (furnace bottom), and the furnace is not blocked by slag and particles generated during masonry; meanwhile, under a certain erosion speed, the positive deviation can ensure that the height of the bottom blowing air supply element 1 is higher than that of the furnace bottom, and the bottom blowing air supply element 1 is fully exposed when slag is splashed, so that the ventilation effect in the period of furnace opening and the early stage of furnace service is ensured.
Compared with the prior art, the size of the design of the invention has the following advantages: the permanent layer protection bricks can be consistent with the original burned magnesite bricks in height, and the multi-layer bricking of the burned magnesite bricks can also realize the tight bricking with the permanent layer protection bricks. The permanent layer protection brick is larger than the protection brick in size, can play a supporting role on the working layer protection brick and the protection brick, and supports partial furnace bottom permanent layer bricks, plays a protecting role on the working layer protection brick, the protection brick and the air brick core, is tightly combined with the furnace body refractory, and avoids the damage of the air brick core in the masonry process.
The invention also provides a building method of the bottom blowing air supply element brick for the semisteel smelting converter, wherein the building sequence of the bottom blowing air supply element, the brick and the converter is as follows:
s1, inserting and fixing the bottom blowing air supply element 1 into a third through hole of the furnace shell 7; wherein the bottom blowing air supply element 1 is inserted into the furnace shell 7, and the bottom blowing air supply element 1 is locked on the furnace shell 7 or is welded on the furnace shell 7 by using bolts;
s2, mounting the permanent layer protection bricks 5 on the upper surface of the furnace shell 7, and penetrating the bottom blowing air supply element 1 through a second through hole;
s3, mounting the working layer brick 2 on the upper surface of the permanent layer brick 5, and penetrating the bottom blowing air supply element 1 through the first through hole;
s4, mounting the furnace bottom permanent layer burned magnesia bricks 6 on the upper surface of the furnace shell 7 and arranging the furnace bottom permanent layer burned magnesia bricks on the periphery of the outer part of the permanent layer protecting bricks 5;
s5, mounting the protective sleeve brick 3 on the upper surface of the permanent layer protective brick 5, and sleeving the protective sleeve brick outside the working layer protective brick 2;
s6, mounting the furnace bottom working layer bricks 4 on the upper surfaces of the permanent layer protection bricks 5 and the permanent layer burned magnesia bricks 6, and sleeving the furnace bottom working layer bricks outside the protection bricks 3;
s7, filling gaps with magnesia after the furnace bottom is built.
The installation of the invention can be carried out in the converter by an installer by using a cantilever crane, and the installation is well combined in a positioning way, and is built and filled with joints according to the graph.
As a preferred embodiment, the gap between the permanent layer burned magnesite brick 6 and the permanent layer protecting brick 5 is < 3mm, and the gap is filled with magnesite.
As a preferable embodiment, the distance between the protective sleeve brick 3 and the furnace bottom working layer brick 4 is less than or equal to 1mm; the distance between two adjacent furnace bottom working layer bricks 4 is less than or equal to 2mm.
As a preferred embodiment, the bottom-blowing air supply element 1 may be of a circular seam type, a branch pipe type or a sleeve type.
The design and the masonry method of the bottom blowing air supply element brick are independently designed and independently implemented. In 2022, 1 st tests are carried out in a steel making converter of No. 1 and No. 2 steel making plants, the air brick protection brick, the working layer protection brick, the protection sleeve seat brick and the permanent layer protection brick designed by the scheme are adopted, after the air brick is assembled and built according to the flow, the air brick of the converter has no air leakage and steel leakage in the whole furnace service, the whole furnace service re-blowing is realized, the re-blowing service life is 8400, the bottom blowing effect of the converter is stable, the economic and technical indexes and the quality indexes are improved to some extent, the melting loss of the air brick and the seat brick is serious, and the problem of unstable melting corrosion is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The utility model provides a bottom blowing air feed element protects brick for semisteel smelting converter which characterized in that includes: the furnace comprises a working layer protection brick (2), a protection brick (3) and a permanent layer protection brick (5), wherein the permanent layer protection brick (5) is arranged on the upper surface of a furnace shell (7), the working layer protection brick (2) is arranged on the upper surface of the permanent layer protection brick (5), the protection brick (3) is sleeved outside the working layer protection brick (2), and the protection brick (3) is arranged on the upper surface of the permanent layer protection brick (5); the middle part of working layer protects brick (2) is opened there is first perforation, the middle part of permanent layer protects brick (5) is opened there is the second perforation, the middle part of stove outer covering (7) is opened there is the third perforation, first perforation, second perforation and the coaxial intercommunication of third perforation constitute the mounting hole, bottom blowing air feed element (1) inserts in the mounting hole from the below, and the top of bottom blowing air feed element (1) runs through out first perforation.
2. The bottom blowing air supply element protection brick for the semisteel smelting converter according to claim 1 is characterized in that at least one layer of furnace bottom working layer brick (4) is sleeved outside the protection sleeve brick (3), and the furnace bottom working layer brick (4) is arranged on the upper surface of the permanent layer protection brick (5).
3. The bottom blowing air supply element protection brick for a semisteel smelting converter according to claim 2, wherein a plurality of layers of permanent layer-fired magnesia bricks (6) are circumferentially arranged outside the permanent layer-protected brick (5), the permanent layer-fired magnesia bricks (6) are arranged between a furnace bottom working layer brick (4) and a furnace shell (7), and the plurality of layers of permanent layer-fired magnesia bricks (6) are arranged in an up-down superposition manner.
4. The bottom blowing gas supply element protection brick for semisteel smelting converter according to claim 1, wherein the upper and lower end surfaces of the permanent layer protection brick (5) are of a length L 1 Is square with height H Permanent magnet The radius of the second through hole is R Permanent magnet ；
The working layer brick (2) has a truncated cone structure and the height is H Worker's work The radius of the upper end surface is R 1 Radius of lower end face is R 2 The radius of the first through hole is R Worker's work ；
The height of the protective sleeve brick (3) is H Protection device The end face is trapezoid, the upper end face is L with inner side length 2 in The outer side length is L 2 outside of The height is h Upper part The lower end face is trapezoid with the inner side length L 3 in The outer side length is L 3 outside The height is h Lower part(s) Is a trapezoid of (a).
5. The bottom-blowing gas supply element protection brick for a semisteel smelting converter according to claim 4, wherein the length L of the upper and lower end surfaces of the permanent layer protection brick (5) is 1 =200 to 300mm, height H Permanent magnet H is the layer height of the furnace bottom permanent layer-baked magnesia brick, and n is the layer number of the permanent layer-baked magnesia brick; radius R of the second through hole Permanent magnet R+2, R is the outer diameter of the bottom-blowing air supply element;
the height H of the working layer brick (2) Worker's work H+50 to H+100mm, H is the height of the furnace bottom working layer brick, and the radius of the upper end face is R 1 =40 to 50mm, the radius of the lower end surface is R 2 ＝R 1 +2mm; the radius of the first through hole is R Worker's work ＝R+1；
The height H of the protective sleeve brick (3) Protection device =h+50 to h+100mm, the inner side length of the upper end face is L 2 in ＝Z×l 2 in The outer side length is L 2 outside of ＝Z×l 2 in The height is h Upper part ＝Z×h On rings The method comprises the steps of carrying out a first treatment on the surface of the The inner side length of the lower end face is L 3 in ＝Z×l 3 in The outer side length is L 3 outside ＝Z×l 3 in The height is h Lower part(s) ＝Z×h Under the ring The method comprises the steps of carrying out a first treatment on the surface of the Z is the number of rings occupied by the protective sleeve bricks, Z=2-4, l 2 in Is an upper end face L 2 in The inner side length of the brick protection layer of the annular furnace bottom working layer where the side is located is l 2 outside of Is an upper end face L 2 outside of The outer edge of the brick is longer than the outer edge of the working layer protection brick of the furnace bottom where the edge is positioned, l 3 in Is the lower end face L 3 in The inner side length of the brick protection layer of the annular furnace bottom working layer where the side is located is l 3 outside Is the lower end face L 3 outside The edge is positioned at the outer edge of the brick protection layer of the ring furnace bottom working layer; h Worker's work ≥H Protection device 。
6. Bottom-blowing gas supply element protection tile for a semisteel smelting converter according to any of claims 1-5, characterized in that the bottom-blowing gas supply element (1) is a circular seam, a branch pipe or a sleeve.
7. A method for constructing a bottom-blowing air supply element brick for a semisteel smelting converter according to any one of claims 1 to 6, characterized in that the bottom-blowing air supply element (1), the brick and the converter are constructed in the following order:
s1, inserting and fixing a bottom blowing air supply element (1) into a third through hole of a furnace shell (7);
s2, mounting the permanent layer protection brick (5) on the upper surface of the furnace shell (7), and penetrating the bottom blowing air supply element (1) through a second through hole;
s3, mounting the working layer protection brick (2) on the upper surface of the permanent layer protection brick (5), and penetrating the bottom blowing air supply element (1) through the first through hole;
s4, mounting the furnace bottom permanent layer burned magnesia bricks (6) on the upper surface of the furnace shell (7) and arranging the furnace bottom permanent layer burned magnesia bricks around the outer part of the permanent layer protecting bricks (5);
s5, mounting the protective sleeve brick (3) on the upper surface of the permanent layer protective brick (5) and sleeving the protective sleeve brick outside the working layer protective brick (2);
s6, mounting the furnace bottom working layer bricks (4) on the upper surfaces of the permanent layer protection bricks (5) and the permanent layer burned magnesia bricks (6), and sleeving the permanent layer protection bricks on the outer parts of the protection bricks (3);
s7, filling gaps with magnesia after the furnace bottom is built.
8. The method for constructing a bottom-blowing gas supply element brick for a semisteel smelting converter according to claim 7, wherein the gap between the permanent layer burned magnesia brick (6) and the permanent layer protected brick (5) is less than 3mm, and the gap is filled with magnesia.
9. The method for constructing the bottom-blowing air supply element brick for the semisteel smelting converter according to claim 7, wherein the distance between the protective sleeve brick (3) and the furnace bottom working layer brick (4) is less than or equal to 1mm; the distance between two adjacent bricks (4) of the furnace bottom working layer is less than or equal to 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410037683.1A CN117887927A (en) | 2024-01-10 | 2024-01-10 | Bottom blowing air supply element brick protection and masonry method for semisteel smelting converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410037683.1A CN117887927A (en) | 2024-01-10 | 2024-01-10 | Bottom blowing air supply element brick protection and masonry method for semisteel smelting converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117887927A true CN117887927A (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410037683.1A Pending CN117887927A (en) | 2024-01-10 | 2024-01-10 | Bottom blowing air supply element brick protection and masonry method for semisteel smelting converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117887927A (en) |
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- 2024-01-10 CN CN202410037683.1A patent/CN117887927A/en active Pending
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