CN107326142A - A kind of bottom-blowing of converter shield brick and its building method and smelting process - Google Patents
A kind of bottom-blowing of converter shield brick and its building method and smelting process Download PDFInfo
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- CN107326142A CN107326142A CN201710488389.2A CN201710488389A CN107326142A CN 107326142 A CN107326142 A CN 107326142A CN 201710488389 A CN201710488389 A CN 201710488389A CN 107326142 A CN107326142 A CN 107326142A
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- brick
- shield brick
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention provides a kind of bottom-blowing of converter shield brick and its building method and smelting process, bottom blowing shield brick includes upper shield brick (2) and lower shield brick (4)；The projection (22) of cylinder is arranged at upper shield brick (2) bottom, and there is clear opening (21) the lower surface center of upper surface to cylindrical protrusions (22)；The center of lower shield brick (4) upper surface is provided with the cylindrical groove (41) adaptable with the upper shield brick bottom protrusion, and groove (41) lower surface has the circular hole (42) of insertion to the lower surface of lower shield brick (4)；The projection (22) of upper shield brick (2) is installed in the groove (41) of the lower shield brick (4).The bottom blowing shield brick structure of the present invention is simple; it is easily installed, safeguards; upper shield brick position 50~150mm higher than furnace bottom; just it is beneficial to be formed above furnace bottom at the beginning of smelting to splash slag blanket; preferably play a part of protection, and the life-span of circular seam type bottom-blowing air feed element can be synchronously improved while the life of bottom is improved.
Description
Technical field
The present invention relates to converter installation field, especially a kind of bottom-blowing of converter shield brick for improving converter bottom service life and
Its building method and smelting process.
Background technology
Since being widely used in maintaining converter technique from Technology of Slag Splashingfor Furnace Maintenance, converter lining life has obtained constantly soaring,
It can generally reach 10000 stoves or so at present.But while converter lining life is increased, the bottom blowing gas effect of combined blown converter
Different degrees of influence is obtained because splashing slag, furnace bottom maintenance etc..
Patent CN101487072B discloses a kind of multifunctional circular seam type gas supply element for steel melting, utilizes circular seam type venting capability
By force, easy to maintain the characteristics of, significantly extends the service life of converter bottom blowing gas-feeding element, and optimize the smelting of Blowing Converter
Effect.
Patent CN 203373382U disclose a kind of converter bottom blowing gas-feeding element overcoat brick, pass through the bottom blowing gas of customization
Element housing brick, bottom-blowing air feed element is embedded in set brick, to reach protection bottom-blowing air feed element, improve and blow life-span and effect again
Purpose.
Although the above method can not solve to splash slag such as how reducing there is provided the thinking for improving the Blowing Converter life-span
Influence of the layer to bottom blowing gas, how preferably to safeguard bottom blowing shield brick, how in smelting process to reduce bottom blowing shield using splashing slag blanket
The problems such as brick corrodes.
The content of the invention
Brick is protected it is an object of the present invention to provide a kind of bottom-blowing of converter, what solution smelting process bottom blowing shield brick easily corroded asks
Topic.
Specifically, the bottom-blowing of converter shield brick of the present invention includes upper shield brick and lower shield brick；
The projection of cylinder is arranged at upper shield brick bottom, and there is clear opening the lower surface center of upper surface to cylindrical protrusions；
The center of lower shield brick upper surface is provided with the cylindrical groove adaptable with the upper shield brick bottom protrusion, groove
The lower surface of lower surface to lower shield brick has the circular hole of insertion；
The projection of upper shield brick is installed in the groove of lower shield brick.
Further, the projection diameter of upper shield brick is identical with the groove diameter of lower shield brick, raised height and the height of groove
Degree is identical；
The clear opening of upper shield brick is identical with the circle hole radius of lower shield brick.
Further, the height of lower shield brick and the permanent layer of converter bottom are highly consistent, and the height of upper shield brick compares Converter
50~the 150mm of work floor height at bottom；
Converter bottom is located in metal furnace shell, and the bottom is permanent layer, is built into by square brick, and its top is working lining, by magnesium
Carbon brick is built into according to annular.
Further, the position of upper shield brick is corresponding with the annular annulus of working lining, i.e., its position can occupy annulus
One piece of magnesia carbon brick, can also occupy two pieces of magnesia carbon bricks of annulus.
Further, upper shield brick and its some block protection bricks of surrounding are higher by 50~150mm of working lining of converter bottom.
It is a further object to provide the building method that a kind of bottom-blowing of converter protects brick, solve bottom blowing shield brick and be difficult to
The problem of safeguarding.
Specifically, the building method comprises the following steps：
Step S101, builds lower shield brick by laying bricks or stones；
Step S102, after lower shield brick masonry terminates, by upper shield brick and lower shield brick abutting joint；
Step S103, after upper shield brick dock and terminated with lower shield brick, leads directly to circular hole from upper shield brick by metal locating rod and inserts, Gu
Determine bottom blowing shield brick position；
Step S104, after bottom blowing shield brick position is fixed, metal locating rod is extracted；Circular seam type bottom-blowing air feed element is certainly golden
The tapping for belonging to furnace shell is inserted by outside；
Step S105, during circular seam type bottom-blowing air feed element outer tube intubating length 100~200mm of residue, in metal furnace shell
Perforate and fire clay at the gap of circular seam type bottom-blowing air feed element；
Step S106, circular seam type bottom-blowing air feed element outer tube residue length is inserted, with fire clay opening metal furnace shell
Hole is made up, and metal short circuit part is first put into postwelding full weld to metal furnace shell；
Step S107, after metal short circuit part full weld terminates, the outer tube of circular seam type bottom-blowing air feed element is opened with bottom blowing shield brick
Gap between hole is filled with fused magnesite, and gap is made up；
Step S108, after gap is made up, the part metal that circular seam type bottom-blowing air feed element exposes upper shield brick is prevented pounding cap
Cover.
Further, metal locating rod is the handled pipe of one end band, and its free end is inserted from the upper end of upper shield brick, by
Tapping on metal furnace shell is passed, and handle is located at the upper end surface of upper shield brick.
Further, when building lower shield brick by laying bricks or stones, the circular hole of lower shield brick is overlapped with the perforate of metal furnace shell.
Present invention also offers the smelting process that brick is protected using the bottom blowing, the problem of slag blanket influence bottom blowing gas are splashed in solution.
The bottom blowing shield brick structure of the present invention is simple, it is easy to installs, safeguard, upper shield brick position 50~150mm higher than furnace bottom,
Just it is beneficial to be formed above furnace bottom at the beginning of smelting to splash slag blanket, preferably plays a part of protection, and improving the life of bottom
It can synchronously improve the life-span of circular seam type bottom-blowing air feed element simultaneously.
Brief description of the drawings
Accompanying drawing is only used for showing the purpose of specific embodiment, and is not considered as limitation of the present invention, in whole accompanying drawing
In, identical reference symbol represents identical part.
Fig. 1 protects brick overall structure diagram for the bottom-blowing of converter of the present invention；
Fig. 2 protects the structural representation of the upper shield brick of brick for the bottom-blowing of converter of the present invention；
Fig. 3 protects the structural representation of the lower shield brick of brick for the bottom-blowing of converter of the present invention；
Fig. 4 protects the mounting structure schematic diagram of brick for the bottom-blowing of converter of the present invention；
Fig. 5 is higher by furnace bottom working lining schematic diagram for the upper shield brick for occupying the ring of annulus one of the present invention；
Fig. 6 for the present invention occupy the upper shield brick of the ring of annulus one and its magnesia carbon brick of surrounding is higher by the signal of furnace bottom working lining
Figure；
Fig. 7 is higher by furnace bottom working lining schematic diagram for the upper shield brick for occupying the ring of annulus two of the present invention；
Fig. 8 for the present invention occupy the upper shield brick of the ring of annulus two and its magnesia carbon brick of surrounding is higher by the signal of furnace bottom working lining
Figure；
Fig. 9 installs metal locating rod schematic diagram for the bottom blowing shield brick of the present invention；
Figure 10 installs fire clay schematic diagram for the bottom blowing shield brick of the present invention；
Figure 11 installs metal for the bottom blowing shield brick of the present invention and prevents pounding cap schematic diagram；
Figure 12 protects brick installation schematic diagram for the bottom blowing of the present invention.
In figure, 1- bottom-blowing air feed elements protect on 2- and brick are protected under brick, 3- working linings, 4-, 5- permanent layers, 6- metal furnace shells, 7-
Metal locating rod, 8- fire clays, 9- metals are anti-to pound cap, and 10- splashes slag blanket.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Brick is protected the invention provides a kind of bottom blowing for improving converter bottom service life, as shown in figure 1, including upper shield brick 2
With lower shield brick 4.
The upper shield brick 2 and lower shield brick 4 that brick is protected in bottom blowing are separated, it is to avoid above protect brick 2 and lower shield brick 4 is made of one structure meeting
Cause intensity decreases.
As shown in Fig. 2 it is upper shield brick 2 include stage body and projection, be structure as a whole, the stage body be cross section be annulus cylinder
The circle ring column of remaining part, i.e. a quarter after 3/4ths, including six faces are removed along axially cutting along radius, point
It is not two circular arc cambers, two rectangular surfaces and two a quarter anchor rings, the inner circle of a width of radially circle ring column of upper shield brick 2
The distance between anchor ring and cylindrical anchor ring, interior annular and outer toroid centre position on a length of a quarter circle ring column cross section
The length of annulus.Projection 22 of cylinder is arranged on the bottom for protecting brick 2, the upper surface of upper shield brick 2 to cylindrical protrusions 22
There is clear opening 21 lower surface center.
As shown in figure 3, lower shield brick 4 is cuboid, the center of upper surface is provided with the groove 41 of cylinder, groove 41
Surface has the circular hole 42 of insertion to the lower surface of lower shield brick 4.
Raised 22 diameter of upper shield brick 2 is identical with the diameter of groove 41 of lower shield brick 4, the height of projection 22 and the height of groove 41
Degree is identical, and the radius of projection 22 is 50~100mm, is highly 50~100mm, and the projection 22 of upper shield brick 2 stretches into the recessed of lower shield brick 4
In groove 41 so that above protect brick 2 and lower shield brick 4 achieves a butt joint.
The clear opening 21 of upper shield brick 2 is identical with the radius of circular hole 42 of lower shield brick 4, and the radius is compared with circular seam type bottom-blowing air feed element
1 outer tube diameter increase 2mm.
Circular seam type bottom-blowing air feed element 1 is that several layers of sleeve pipes are mutually nested, and wherein central tube position is shut with refractory material, resistance to
Fiery material is highly-purity magnesite, carries out gas conveying using the gap between each pipe in center, gap is as needed for 0.5~5mm, ring
The quantity of seam is 1~3 ring.
Converter bottom is located in metal furnace shell 6, and the bottom is permanent layer 5, is built into by square brick, and its top is working lining 3, by
Magnesia carbon brick is built into according to annular.
The building method of bottom blowing shield brick is built by laying bricks or stones for on-plane surface, and the height of lower shield brick 4 builds permanent layer height by laying bricks or stones with converter bottom
Unanimously, the upper shield position of brick 2 just forms above furnace bottom at the beginning of smelting compared with furnace bottom work 50~150mm of floor height and splashes slag blanket, more preferably
Play a part of protection, the erosion of circular seam type bottom-blowing air feed element is synchronous with the erosion of furnace bottom refractory lining, bottom blowing shield brick
, furnace lining and bottom blowing shield brick can be protected by splashing the formation of slag blanket, reduce furnace lining and the erosion of brick is protected in bottom blowing.If upper shield brick
The height that 2 positions are higher by compared with furnace bottom working lining is more than 150mm, the stove of converter first smelt plus during steel scrap and scrap iron easily
Upper shield brick 2 is damaged and fractureed, the safety of bottom blowing gas original paper is influenceed on the contrary, in addition, it is too thick to be easily caused the slag blanket to be formed, influence
The internal structure in the molten bath of converter, influences smelting and the service procedure of converter；If the height being higher by is less than 50mm, it is unfavorable to cause
Hung in the gear of clinker, be unfavorable for the formation of slag blanket on furnace bottom, do not have the effect safeguarded to furnace bottom.It was verified that upper shield brick 2
Put the height being higher by compared with furnace bottom working lining the most suitable in 100mm or so.
The upper shield position of brick 2 is compared with furnace bottom work 50~150mm of floor height, including two kinds of situations, as shown in figure 4, the first situation
It is that only upper shield brick 2 is higher by converter bottom working lining, as shown in figure 5, second of situation, which is upper shield brick 2 surrounding block, some pieces of guarantors
Brick is protected, optionally, protection tile can be magnesia carbon brick, including upper shield brick 2 and its some block protection bricks of surrounding are higher by furnace bottom work
Make layer, as shown in fig. 6, the dead slot formed by the part that is higher by is filled and led up by splashing slag blanket 10.
Protection tile is higher by furnace bottom can form the projection for being higher by working lining on the furnace bottom of converter, and these raised presence have
Beneficial to slag layer is formed on working lining, by working lining protection under slag blanket, to reduce erosion.Meanwhile, it is raised again can be to prevent
Only circular seam type bottom-blowing air feed element 1 is embedded under slag blanket, so as to ensure the air permeable effect of circular seam type bottom-blowing air feed element 1.Root
Factually the need for border, raised part can be only the protection tile of upper shield brick 2 or upper shield brick 2 together with its periphery.Under
Shield brick 4 is high as furnace bottom permanent layer, is so conducive to furnace bottom working lining to protect building by laying bricks or stones for brick 2 with upper.
Protected in bottom blowing brick 2 position and working lining it is annular corresponding, i.e., its position can occupy one piece of annular annulus
Magnesia carbon brick, can also occupy two pieces of magnesia carbon bricks of annulus, that is to say, that above protecting the wide of brick 2 can be identical with the width of magnesia carbon brick, also may be used
It is one piece of magnesia carbon brick that upper shield brick 2 occupies annulus to be twice of magnesia carbon brick width, in Fig. 5 and Fig. 6, Fig. 7 and Fig. 8 are upper shield brick
2 occupy two pieces of magnesia carbon bricks of annulus.
Upper shield brick 2 is integrally formed structure type with lower shield brick 4, and its composition and quality proportioning are：MgO：70~
85%, carbon：10~25%, MgO+ carbon：92~96%, silicon：4~8%.
Optionally, composition and quality proportioning are：MgO:80%, carbon 16%, silicon：4%.
Main component in magnesia carbon brick is MgO, and carbon has high-termal conductivity and low expansion, compensate for alkaline composition anti-strip
Property difference shortcoming.Silicon can form steam at high temperature, and it is more than carbon with the activity that oxygen reacts, can be anti-with oxygen before carbon
Should, play a part of protecting carbon, and then protect bottom blowing shield brick.
Present invention also offers the building method that brick is protected in the bottom blowing, comprise the following steps：
Step S101, according to the position of opening of converter metal furnace shell 6, builds lower shield brick 4 by laying bricks or stones；
When building lower shield brick 4 by laying bricks or stones, the circular hole 42 of lower shield brick 4 is overlapped with the perforate of metal furnace shell 6, lower shield brick 4 is laid
In on metal furnace shell 6；Step S102, lower shield brick 4 is built by laying bricks or stones after end, by upper shield brick 2 and the lower shield abutting joint of brick 4, upper shield brick 2
On lower shield brick 4；
Step S103, as shown in figure 9, upper shield brick 2 is docked with lower shield brick 4 after terminating, metal locating rod 7 is straight from upper shield brick
Logical circular hole insertion, it is ensured that the perforate of metal furnace shell, lower shield brick perforate, upper shield brick perforate are overlapped, fixed bottom blowing shield brick position；
Metal locating rod 7 is the handled pipe of one end band, and pipe free end is inserted from the upper end of upper shield brick 2, by metal
Tapping on furnace shell 6 is passed, and handle is located at the upper end surface of upper shield brick 2；
Step S104, after bottom blowing shield brick position is fixed, metal locating rod 7 is extracted, by circular seam type bottom-blowing air feed element 1 certainly
The tapping of metal furnace shell 6 is inserted by outside；
Step S105, during outer tube intubating length 100~200mm of residue of circular seam type bottom-blowing air feed element 1, such as Figure 10 institutes
Show, " wax head dummy " fire clay 8 is broken at the perforate of metal furnace shell 6 and the gap of circular seam type bottom-blowing air feed element 1；
Wax head dummy, is the centrum as the first sample shape of candle flame；
Step S106, the outer tube residue length of circular seam type bottom-blowing air feed element 1 is inserted, metal furnace shell is opened with fire clay
Hole is made up, and metal short circuit part is first put into postwelding full weld to metal furnace shell；
Metal short circuit part is a part for circular seam type bottom-blowing air feed element, and air supply device and gold are realized by metal short circuit part
Belong to furnace shell welding, so-called full weld refers to the whole soldering of seam of metal short circuit part and metal furnace shell, the leakage do not welded is not left
Point；
Step S107, after metal short circuit part full weld terminates, the outer tube of circular seam type bottom-blowing air feed element 1 is opened with bottom blowing shield brick
Gap between hole is filled with the fused magnesite of the mesh of ＜ 100, and gap is made up；
Step S108, after gap is made up, as shown in figure 11, circular seam type bottom-blowing air feed element 1 is exposed the part of upper shield brick 2
Prevent that pounding cap 9 covers with metal.Building by laying bricks or stones for all bottom blowing shield bricks can be completed successively, as shown in figure 12.
Metal prevents that it is interior empty annular box to pound cap 9, can be by the end of circular seam type bottom-blowing air feed element 1 and upper shield brick 2
Top cover together, can prevent from smelting in first time and start addition steel scrap or pound circular seam type bottom-blowing air feed element during molten iron
It is bad, play a protective role, when high temperature liquid iron, which is smelted, to be started, metal is anti-to be pounded cap 9 and can be melt as steel scrap and melt, without influenceing
The normal of bottom-blowing air feed element is used.
During for protecting the smelting process of brick using the bottom blowing of the present invention, comprise the following steps：
Step S1, carries out slag splashing operation, the characteristics of dross easy using furnace bottom, by Converter Bottom Rising to and bottom blowing
The upper shield height of brick 2 flushes or is higher by the position no more than 200mm；
Step S2, smelting process carries out bottom blowing flow adjustment according to actual needs, and method of adjustment includes following two：
The first：Selected according to steel grade, its flow selection mode is as follows,
Second：Selected according to the smelting stage, its flow selection mode is as follows,
In summary, the invention provides a kind of bottom-blowing of converter shield brick and its building method, have the characteristics that：
1. the bottom blowing shield brick of the structure causes converter gas permeability strong, it should not block, mould is conveyed according further to selected gas
Formula, splash slag process bottom blowing tolerance already allow for bottom blowing air permeability the need for, ensure that bottom-blowing air feed element is not blocked, make
Obtain bottom blowing gas is not influenceed by slag blanket is splashed；
2. bottom blowing shield brick structure is simple, it is easy to installs, safeguard, upper shield brick position 50~150mm higher than furnace bottom, in smelting
Just it is beneficial to be formed above furnace bottom at the beginning of refining to splash slag blanket, preferably plays a part of protection, circular seam type bottom-blowing air feed element is invaded
It is synchronous to lose with the erosion of furnace bottom refractory lining, bottom blowing shield brick, and the formation for splashing slag blanket can be by furnace lining and bottom blowing shield brick protection
Get up, reduce furnace lining and the erosion of brick is protected in bottom blowing；
3. the complicated high temperature of converter, high oxidative smelting condition so that converter bottom is in relatively steady state, smelt
During circular seam type bottom-blowing air feed element may be splashed slag blanket and blocked, it is also possible to it is exposed, thus according to smelt the difference of steel grade with
The difference of the duration of heat is, it is necessary to select rational flow delivery modes, the structure type of bottom blowing shield brick and the method built by laying bricks or stones, more
Be conducive to furnace bottom to safeguard, improve furnace bottom service life.In reality, many situations be because bottom blown gas carrying method it is improper or
It is improper that furnace bottom is safeguarded, causes furnace bottom fluctuation greatly, bottom blowing gas can not be safeguarded effectively, and bottom blowing confession is abandoned for protection stove bottom
Gas so that bottom blowing gas can not be synchronous with the life of bottom, and the present invention can synchronously improve circumferential weld while the life of bottom is improved
The life-span of formula bottom-blowing air feed element.
Although combined preferred embodiment is described in detail to the present invention, those skilled in the art should
What it is when understanding is that various amendments are all allowed, and they both fall within this hair in the case of without prejudice to spirit of the invention and essence
Among bright scope of the claims.
Claims (9)
1. brick is protected in a kind of bottom blowing, it is characterised in that including upper shield brick (2) and lower shield brick (4)；
The projection (22) of cylinder, the lower surface center of upper surface to cylindrical protrusions (22) are arranged at described upper shield brick (2) bottom
There is clear opening (21)；
The center of described lower shield brick (4) upper surface is provided with the cylindrical groove adaptable with the upper shield brick bottom protrusion
(41), groove (41) lower surface has the circular hole (42) of insertion to the lower surface of lower shield brick (4)；
The projection (22) of the upper shield brick (2) is installed in the groove (41) of the lower shield brick (4).
2. brick is protected in bottom blowing according to claim 1, it is characterised in that projection (22) diameter of the upper shield brick (2) is with
Groove (41) diameter for protecting brick (4) is identical, and the height of raised (22) is identical with the height of groove (41)；
The clear opening (21) of the upper shield brick (2) is identical with circular hole (42) radius of the lower shield brick (4).
3. brick is protected in bottom blowing according to claim 1 or 2, it is characterised in that the height and converter bottom of the lower shield brick (4)
Permanent layer it is highly consistent, it is described it is upper shield brick (2) work floor height 50~150mm of the height than converter bottom；
The converter bottom is located in metal furnace shell (6), and the bottom is permanent layer (5), is built into by square brick, and its top is working lining
(3), it is built into by magnesia carbon brick according to annular.
4. brick is protected in bottom blowing according to claim 3, it is characterised in that the position of the upper shield brick (2) and the ring of working lining
The annulus of shape is corresponding, i.e., its position can occupy one piece of magnesia carbon brick of annulus, can also occupy two pieces of magnesia carbon bricks of annulus.
5. brick is protected in bottom blowing according to claim 1 or 2, it is characterised in that upper protect brick (2) and its surrounding some pieces
Protection tile is higher by 50~150mm of working lining of converter bottom.
6. the building method of brick is protected in a kind of any bottom blowings of claim 1-5, it is characterised in that comprised the following steps：
Step S101, builds lower shield brick (4) by laying bricks or stones；
Step S102, lower shield brick (4) is built by laying bricks or stones after end, by upper shield brick (2) and lower shield brick (4) abutting joint；
Step S103, after upper shield brick (2) dock and terminated with lower shield brick (4), from upper shield brick leads directly to circular hole slotting by metal locating rod (7)
Enter, fixed bottom blowing shield brick position；
Step S104, after bottom blowing shield brick position is fixed, metal locating rod (7) is extracted；By circular seam type bottom-blowing air feed element (1) certainly
The tapping of metal furnace shell (6) is inserted by outside；
Step S105, during outer tube intubating length 100~200mm of residue of circular seam type bottom-blowing air feed element (1), in metal furnace shell
(6) perforate and fire clay (8) at the gap of circular seam type bottom-blowing air feed element (1)；
Step S106, the outer tube residue length of circular seam type bottom-blowing air feed element (1) is inserted, with fire clay by metal furnace shell (6)
Perforate make up, metal short circuit part is first put into postwelding full weld to metal furnace shell；
Step S107, after metal short circuit part full weld terminates, brick perforate is protected by the outer tube of circular seam type bottom-blowing air feed element (1) and bottom blowing
Between gap filled with fused magnesite, gap is made up；
Step S108, after gap is made up, the part metal that circular seam type bottom-blowing air feed element (1) exposes upper shield brick (2) is prevented pounding
Cap (9) is covered.
7. the building method of brick is protected in bottom blowing according to claim 6, it is characterised in that the metal locating rod (7) is one
End is inserted with handled pipe, its free end from the upper end of upper shield brick (2), and the tapping on metal furnace shell (6) is passed,
Hand is located at the upper end surface of upper shield brick (2).
8. the building method of brick is protected in bottom blowing according to claim 6, it is characterised in that described when building lower shield brick (4) by laying bricks or stones, under
The circular hole (42) of shield brick (4) is overlapped with the perforate of metal furnace shell (6).
9. a kind of usage right requires that the smelting process of brick is protected in any bottom blowings of 1-5.
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| CN201710488389.2A CN107326142B (en) | 2017-06-23 | 2017-06-23 | A kind of bottom-blowing of converter shield brick and its building method and smelting process |
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|---|---|---|---|
| CN201710488389.2A CN107326142B (en) | 2017-06-23 | 2017-06-23 | A kind of bottom-blowing of converter shield brick and its building method and smelting process |
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| CN107326142A true CN107326142A (en) | 2017-11-07 |
| CN107326142B CN107326142B (en) | 2019-04-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628687A (en) * | 2018-12-30 | 2019-04-16 | 钢铁研究总院 | A method of preventing converter bottom blowing gas-feeding element tuyere position bleed-out |
| CN110106306A (en) * | 2019-06-14 | 2019-08-09 | 钢铁研究总院 | A kind of bottom-blowing air feed element installation method |
| CN115572789A (en) * | 2022-10-25 | 2023-01-06 | 武钢集团昆明钢铁股份有限公司 | Installation method of converter bottom blowing gas supply element |
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| CN102534106A (en) * | 2012-03-07 | 2012-07-04 | 钢铁研究总院 | Embedded protective brick for circular seam gas supply element for steelmaking |
| CN202658177U (en) * | 2012-04-26 | 2013-01-09 | 河北钢铁股份有限公司唐山分公司 | Bottom blowing protection brick structure for converter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628687A (en) * | 2018-12-30 | 2019-04-16 | 钢铁研究总院 | A method of preventing converter bottom blowing gas-feeding element tuyere position bleed-out |
| CN110106306A (en) * | 2019-06-14 | 2019-08-09 | 钢铁研究总院 | A kind of bottom-blowing air feed element installation method |
| CN115572789A (en) * | 2022-10-25 | 2023-01-06 | 武钢集团昆明钢铁股份有限公司 | Installation method of converter bottom blowing gas supply element |
| CN115572789B (en) * | 2022-10-25 | 2024-03-26 | 武钢集团昆明钢铁股份有限公司 | Installation method of converter bottom blowing air supply element |
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