CN106435073A - Blast furnace liner overall pouring construction method for replacing spraying materials and refractory bricks - Google Patents

Blast furnace liner overall pouring construction method for replacing spraying materials and refractory bricks Download PDF

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Publication number
CN106435073A
CN106435073A CN201611001478.1A CN201611001478A CN106435073A CN 106435073 A CN106435073 A CN 106435073A CN 201611001478 A CN201611001478 A CN 201611001478A CN 106435073 A CN106435073 A CN 106435073A
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China
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blast furnace
mould
shaft
furnace
cupola well
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CN201611001478.1A
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CN106435073B (en
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许树斌
柳萌
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WUHAN HONGCHENG METALLURGICAL MATERIAL CO Ltd
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WUHAN HONGCHENG METALLURGICAL MATERIAL CO Ltd
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/04Blast furnaces with special refractories
    • C21B7/06Linings for furnaces

Abstract

The invention discloses a blast furnace liner overall pouring construction method for replacing spraying materials and refractory bricks, and relates to the field of blast furnace repair and new construction. The method comprises the following steps: damaged parts of a furnace hearth and a furnace body of a blast furnace are determined; the furnace hearth and the furnace body are cleaned; a pouring material is prepared; the furnace hearth, a furnace bosh, a furnace waist, the lower part of the furnace body and the upper part of the furnace body respectively adopt a high-strength ultrafine powder combined corundum-SiC pouring material, the high-strength ultrafine powder combined corundum-SiC pouring material, a high-strength ultrafine powder combined high-aluminum-SiC pouring material and a high-strength ultrafine powder combined high-aluminum-mullite pouring material; templates/molds are mounted in the blast furnace from bottom to top; the pouring materials are poured from bottom to top by a vibration or self-flowing pouring forming method to form a pouring liner body; the poured templates/molds are dismounted from top to bottom; after the hardness of the pouring liner body reaches the requirements, the templates/molds are dismounted; and the natural drying and the baking are performed. The method can obtain the blast furnace liner body with more compact structure, higher fire resistance and longer service life.

Description

A kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick
Technical field
The present invention relates to blast furnace reparation and newly-built field, and in particular to the blast furnace lining of a kind of replacement spray paint and refractory brick Monolithic casting construction method.
Background technology
The positions such as Iron Works cupola well (containing tapping hole, tuyere zone), shaft (containing bosh, furnace bosh) are in production a period of time Afterwards, can be because of construction quality, production operation, the impact of the factor such as material quality, especially strengthening smelting, cause blast furnace has GUAN spot There is different degrees of damage in position:A, blast furnace crucibe ceramic cup are caused to peel off, are led under the influence of high temperature corrosion, material corrode Cause basic function forfeiture;B, cupola well position deteriorate, peel off because of brick fuel liner body, thinning, causes furnace bottom heat flow rate per unit area to improve;C, Tie Kou Position, also occurs that different degrees of liner corrodes, peels off, makes tapping hole in bell mouth shape, so as to cause ferrum mouth depth shallower, Block up difficulty, stemming consumption increases;D, tuyere zone position, due to the abrasion of furnace charge, the corrosion of high temperature, the impact of thermal current, meeting Occurs the thinning and irregular situation of fire resisting liner body in various degree;E, blast-furnace shaft (containing bosh, furnace bosh) position are due to being rushed by material Hit, airflow scouring, the effect of chemical erosion, hot corrode etc., inner lining refractory (as refractory brick, spray paint) is thinning or de- Fall, cooling wall is damaged, and loses refrigerating function.
Above-mentioned damage can cause the flushing and casting ecological deterioration of blast furnace, there is serious potential safety hazard, and directly affect height The safety in production of stove and service life.
In order to ensure blast fumance be normally carried out and site environment safety, extend the life of the blast furnace, develop skill economy Benefit, needs to repair the damaged part of blast furnace, in recent years, the repairing construction of blast-furnace shaft is general using semidry method spray Coating or wet spray material (or saying jetting material) are carried out integral spray maintenance or are repaired in blast furnace using the method for building refractory brick by laying bricks or stones Lining is safeguarded.
When carrying out blast furnace lining reparation using spray paint (or jetting material), after drying and burn till due to spray paint, structure Consistency is relatively low, and fire resistance is relatively low, and poor with the conjugation of former blast furnace lining structure, after the completion of reparation when using, resistance to Fiery performance is relatively low, is susceptible to come off, and service life is shorter.
Although the technical specification of presently disclosed spray paint is higher, when actually detected, substantially using cast Forming method is detected, spray paint (material containing wet injection) is due to taking spraying application, and actual index compares theory index Low to obtain many.
Moreover, when carrying out blast furnace lining reparation using the method for building refractory brick by laying bricks or stones, grouted using the fire clay of the corresponding trade mark Build, not only the old and new's faying face is difficult to process, and the density combined with refractory brick due to refractory wass by new masonry be poor, In use for some time, easily space is formed, causes refractory brick liner body to combine tight, easily wear and tear, occur coming off, even Partial collapse, service life is shorter.
Content of the invention
For defect present in prior art, it is an object of the invention to provide a kind of spray paint and refractory brick of substituting Blast furnace lining monolithic casting construction method, can obtain after reparation that structure is dense, and fire resistance is higher, and service life is longer Blast furnace lining liner body.
For reaching object above, the present invention is adopted the technical scheme that:
A kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick, comprises the following steps:
S1, the cupola well for determining blast furnace, the damaged part of shaft, the cupola well includes tapping hole and tuyere zone, the shaft Including bosh and furnace bosh, cupola well and shaft is cleared up;
S2, preparation castable:Wherein, cupola well, bosh, furnace bosh and restoration of lower stack, upper shaft are respectively adopted high-strength ultra micro Powder combined corundum-SiC matter castable, high-strength superfine powder combined corundum-SiC matter castable, high-strength superfine powder combine high alumina-SiC Matter castable and high-strength superfine powder combine high alumina-mullite castable;
S3, model sheetinstallat:Cupola well, shaft construction formwork/mould are installed inside blast furnace from the bottom to top;
S4, integrated poured:Take vibrations or the method for gravity flow pouring molding to pour into a mould castable from the bottom to top, form cast lining Body;
S5, the demoulding:From top to bottom cast template/mould and other structural members, support member is removed, be beneficial to castable and take off Water, hardening;
S6, natural drying and baking:After the hardness of liner body to be cast reaches requirement, form removal/mould and through naturally do Dry and baking, makes cast liner body slough moisture, reaches certain intensity.
On the basis of technique scheme, the reparation thickness at the cupola well position is not less than 200mm;The shaft position Reparation thickness be not less than 100mm, or cause the size restoration of blast furnace lining to identical with initial designs size and the type of furnace.
On the basis of technique scheme, the cupola well includes tapping hole and tuyere zone, the shaft include bosh and Furnace bosh, in step S1, cleaning cupola well and shaft specifically include following steps:Safe construction bar is reached in confirmation job site After part, using the equipment such as oxyacetylene metal-cutting, pneumatic pick, drill rod or instrument, will be clean to the coke in cupola well and the complete liquidation of slag iron mixture, will Cupola well, tapping hole, the residual ferrum of tuyere zone inwall, residue are cleaned out, and cupola well position should be cleared up to brick fuel position, until to be repaired The brick fuel at position is exposed out;Or cleaning till death iron layer with upper bit;
Using the equipment such as pneumatic pick, drill rod or instrument, the residual ferrum of the inner lining surface of blast-furnace shaft, residue are cleaned out, and The refractory material that will loosen, including refractory brick and spray paint, cleans out, until the fire resisting liner body and cooling wall of repairing position are aobvious Expose.
On the basis of technique scheme, further comprising the steps of before step S3:By Blast Furnace Bottom or ladle heel The above position of layer pats whole, and before installation blast furnace lining template/mould, the blast furnace lining includes cupola well and shaft, in height Inner lining of furnace material surface smears one layer of antioxidizing paint;Meanwhile, one is smeared in template/mould inner wall against the one side of cast liner body The miscella of layer, miscella is butter and used oil according to 2:1 ratio is made.
On the basis of technique scheme, when tuyere zone is poured into, tuyere zone template/mould is installed, air port is installed Should be noted that furnace shell and cupola well template are fixed during band template/mould, the thickness of tuyere zone castable liner body is not less than 200mm, i.e. root Deteriorate degree according to tuyere zone, so that castable liner body is recovered to size or the thickness of the initial type of furnace of newly-built blast furnace.
On the basis of technique scheme, the tuyere zone tool/die made not less than 3mm steel plate using thickness, Or made using wood materials.
On the basis of technique scheme, cupola well, shaft construction formwork/or mould are installed in step S3 from the bottom to top During tool, the height that installs every time is 1~3m.The actual height that installs every time should be according to the calibrated altitude of template/mould or place The height of position cast liner body determines.Template/mould can adopt steel material, and wood materials may also be employed;Steel can also be adopted Matter and wood materials are alternately, arranging in pairs or groups is carried out.
On the basis of technique scheme, cupola well, shaft construction formwork/mould are installed in step S3 from the bottom to top When, the height that installs every time is usually 1.5m.
On the basis of technique scheme, the installation blast furnace crucibe, shaft template/mould are further comprising the steps of: In the non-casting area of blast furnace crucibe shaft template/mould, support member is arranged using steel construction, for supporting mould.
On the basis of technique scheme, the installation blast furnace crucibe, shaft template/mould are further comprising the steps of: On the top in blast furnace crucibe, shaft die casting face, support member is set, for support shuttering/mould.
Compared with prior art, it is an advantage of the current invention that:
(1) a kind of replacement spray paint of the present invention and the blast furnace lining monolithic casting construction method of refractory brick, using cast Expect integrated poured blast furnace crucibe (containing tapping hole, tuyere zone), shaft (containing bosh, furnace bosh) liner, spray paint, refractory brick compared, Pressure/rupture strength, refractoriness under load, bulk density after there is higher refractoriness, drying and burning, relatively low apparent porosity With reheating rate of change, good antiscour, anti-erosion, wear-corrosion resistance, while with good thermal shock resistance.Detect and real Border application result is proved:All technical performance indexs of castable are superior to spray paint and refractory brick, as castable structure is caused Close, and intensity is higher, fire resistance is higher, and globality is greatly improved, and makes the lining of shaft become " the fire resisting liner body " of firm compact, makes Greatly improved with the life-span.
(2) a kind of replacement spray paint of the present invention and the blast furnace lining monolithic casting construction method of refractory brick, castable material Liquid flowability is preferable, quick and convenient, quick-drying anti-explosion function admirable of constructing, and demoulding time is short, can save blast furnace lining safeguard and The engineering time of reparation.And castable compares spray paint, castable baking no particular/special requirement, by normal before normal blast furnace opening Baking regime execute, simply according to castable consumption and cast liner body thickness make appropriate adjustment, reduce construction hardly possible Degree.
(3) a kind of replacement spray paint of the present invention and the blast furnace lining monolithic casting construction method of refractory brick, with existing skill " blast-furnace shaft liner " is made in art, compare in particular by " concave-convex type ", " mosaic " fire resisting brick manufacturing process, technics comparing Simply, production and construction cost is reduced.
(4) a kind of replacement spray paint of the present invention and the blast furnace lining monolithic casting construction method of refractory brick, the height for obtaining The globality of the stove lining of shaft is greatly improved, and planform design in blast-furnace shaft liner, has bigger space in terms of process, More importantly the globality due to pouring into a mould liner body increases, and is greatly improved the service life of blast-furnace shaft fire resisting liner body, so as to The furnace life of blast furnace is greatly improved, while the loss of the operating rate of blast furnace reduction that the frequent blowing out damping down maintenance of blast furnace brings is reduced, Greatly improve operating rate of blast furnace, improve production efficiency, develop skill economic benefit.
(5) a kind of replacement spray paint of the present invention and the blast furnace lining monolithic casting construction method of refractory brick, it is to avoid spray The resilience of coating, on the one hand, reduce material consumption, resource is fully used, and reduces maintenance cost;Another then, due to not having There is resilience material, the clearance time of resilience material is reduced, so as to the maintenance duration is shortened, improve the operating rate of blast furnace.
Specific embodiment
Below in conjunction with subordinate list and case study on implementation, the present invention is described in further detail.
Ginseng is shown in Table 1, and case study on implementation of the present invention provides a kind of replacement spray paint and the blast furnace lining of refractory brick is integrally poured Note construction method, comprises the following steps:
S1, the cupola well for determining blast furnace, the damaged part of shaft, cupola well includes tapping hole and tuyere zone, and shaft includes bosh And furnace bosh:Position and erosion condition that confirmation blast furnace crucibe, shaft are etched;Confirm blast furnace crucibe, the depth of shaft damaged part Degree, area and volume;Meanwhile, confirm blast furnace crucibe, shaft running status whether good, confirm to repair according to overall condition in damaged Multiple and arrangement and method for construction.
S2, the cupola well of cleaning blast furnace and shaft, and security protection system is installed:Carry out blast furnace staying (blowing out) first, make Blast furnace crucibe, the temperature of shaft position construction area, gas concentration are obtained in safety range, i.e., temperature is less than 35 DEG C, and coal gas is dense Degree is less than 50ppm.
On the top of cupola well and shaft, safety guard net Build Security platform, cleaning cupola well, lining of shaft position are set Scum, residue (residual ferrum), slag, and by residue, melt tumor, Weathered Material, oxidation material and clean out, loose resistance to material cleaning is done Only, high pressure water washing inner lining surface is subsequently adopted.
Change and repair impaired cooling wall in blast-furnace shaft, to guarantee the normal use of cooling system after the multiple wind of blow-on.
Wherein, concretely comprising the following steps for cupola well (containing tapping hole, tuyere zone) is cleared up:Using equipment such as gas cutting, pneumatic pick, drill rods or Instrument, will be clean to the coke in cupola well and the complete liquidation of slag iron mixture, by cupola well, tapping hole, the residual ferrum of tuyere zone inwall, residual Slag is cleaned out, cupola well position should clear up to brick fuel (at least clear up iron layer till death, during condition license, preferably will be whole for ladle heel layer Clean out) position, until the brick fuel at position to be repaired is exposed out, it is easy to the tight knot of castable and cupola well position refractory material During contract, it is impossible to dispose original cupola well (or furnace bottom) brick fuel.
Clear up concretely comprising the following steps for shaft position inner lining surface:Using equipment or instruments such as pneumatic pick (electric drill), drill rods, by height The residual ferrum on stove lining of shaft surface, residue are cleaned out, and will be dry for refractory material (containing the refractory brick, spray paint etc.) cleaning for loosening Only, the fire resisting liner body until repairing position is revealed, and is easy to the tight of castable and lining of shaft refractory material and cooling facility Close combination.
S3, preparation castable, wherein, cupola well (tapping hole, tuyere zone) is poured using high-strength superfine powder combined corundum-SiC matter Material feeding, bosh position uses high-strength superfine powder combined corundum-SiC matter castable, furnace bosh and restoration of lower stack to use high-strength superfine powder In conjunction with high alumina-SiC matter castable, furnace bosh top combines high alumina-mullite castable using high-strength superfine powder.
S4, Blast Furnace Bottom (ladle heel layer top) is processed smooth, and the inner lining material surface at blast furnace crucibe, shaft position One layer of antioxidizing paint is smeared, is beneficial to combining closely for castable and refractory material, meanwhile, the demoulding for convenience, install high Before stove shaft template/mould, template/mould inner wall should be smeared one layer of (butter:Used oil=2:1) miscella.
S5, cupola well, shaft construction formwork/mould are installed inside blast furnace from the bottom to top, the height that installs every time be (in the present embodiment be 1.5m), the height of actual installation pours into a mould the highly true of liner body according to the calibrated altitude of template or place position Fixed.Template/mould can adopt steel material, can also adopt wood materials, steel and wood materials can also be adopted to replace, take Joining is carried out.
Carry out installing by cupola well (containing tapping hole, tuyere zone) → bosh → furnace bosh → shaft position from the bottom to top, fixing phase Corresponding template/mould;While carrying out integrated poured to completing, cast liner body is formed, and pours into a mould height and the template peace of liner body The height basic synchronization of dress;Blast furnace crucibe position repair thickness, the reparation thickness at shaft position should be as close possible to initially setting The size of meter furnace lining, to guarantee the recovery of the initial type of furnace.
Wherein, when tuyere zone being poured into, special tuyere zone template/mould should be installed, tuyere zone template/mould is installed The fixation with furnace shell and cupola well template is should be noted that during tool, and the size of tuyere zone template/mould should setting as close possible to tuyere zone Meter size, tuyere zone template/mould is typically made using steel plate, and the thickness of steel plate is not less than 3mm, it would however also be possible to employ wood materials Make, when tuyere zone template/mould is installed, it should be ensured that the thickness of tuyere zone castable liner body is not less than 200mm, or makes cast Material liner body is as close possible to the dimensional thickness of the initial tuyere zone of newly-built blast furnace.
Blast furnace crucibe, the installation of shaft template/mould:Blast furnace crucibe, the non-casting area of shaft template/mould, should adopt Steel structure support and fixation;Blast furnace crucibe, the top in shaft template/die casting face, also should adopt steel structure support and fixation, Guarantee the stable of mould and fix to have offset phenomena in all senses.By suitable support member fixed form/mould, Guarantee stable, the firm and density of template/mould entirety, it is ensured that the globality of casting and constructing liner body and density.
In this example, when blast furnace crucibe, shaft template/mould is installed, should confirm:Cupola well cast thickness, tuyere zone are poured The size as close possible to the initial designs type of furnace such as thickness, thickness of shaft castable is noted, even if castable liner body is connect as far as possible Closely newly-built blast furnace crucibe, the thickness of lining of shaft refractory material.
When S6, the hardness of liner body to be cast reach requirement standard, form removal/mould and security protection system are simultaneously done naturally Dry and baking cast liner body is to conformance with standard.
The comparison of castable and spray paint technical performance and using effect:
1 castable of table safeguards blast-furnace shaft lining technique Economic contrast with spray paint
Understand referring to table 1:Compared with spray paint, it is little, resistance to that castable has intensity height, good integrity, reheating linear change rate on reheating Performance of flushing is excellent, no resilience, long service life feature, and techno-economic effect is notable.
Using the method for the present invention, carry out integrated poured construction to blast furnace crucibe, shaft using castable and repair, obtain Cast liner body there is higher drying and heat treatment structure intensity, relatively low Linear change rate, good wearability and antiscour Performance, high temperature hot performance is good, refractoriness under load height, while with good thermal shock resistance, heat resistanceheat resistant airflow scouring performance, To Ore, coke etc. in stove with good wearability, material liquid flowability is good, quick-drying anti-explosion function admirable, and demoulding time is short etc. Advantage.
The present invention is by damaging to blast furnace crucibe, the fault of construction of lining of shaft refractory material and Wear mechanism, cooling wall The origin cause of formation carries out deep analysis, and the theoretical research with reference to castable and application practice, while by spray paint (either partly Dry spraying, or wet injection material) and blast furnace lining refractory brick (brick of ceramic cup containing blast furnace crucibe) combined with high-strength superfine powder The comparison of serial castable (hereinafter referred to as castable) performance indications, it is known that, castable has higher refractoriness, drying and burning Pressure afterwards/rupture strength, refractoriness under load, bulk density, relatively low apparent porosity and reheating linear change rate on reheating, good anti-impact Brush, anti-erosion, wear-corrosion resistance, overall performance is excellent, especially has good thermal shock resistance, it may be said that the institute of castable Technical performance index is had to be superior to spray paint and refractory brick.
Below, by a kind of specific case study on implementation, the present invention will be described in detail.
The use of object is certain iron-smelter 1750m3Blast furnace, the blast furnace run more than 5 years, more than the blast-furnace bosh is thin-walled Lining Design, tuyere combined brick adopts silicon nitride combined silicon carbide brick, and cupola well is taken big carbon block directly to build by laying bricks or stones, is provided without ceramic cup Design.
By site inspection, the blast furnace crucibe ceramic cup (actual is protection tile), because corroding, peeling off, is lost substantially Due function, cupola well brick fuel liner body is deteriorated, denudes because high-temperature molten material, peeling, thinning phenomenon occurs, causes furnace bottom heat Intensity of flow higher (cupola well brick fuel depth of erosion reaches 200~300mm);Tapping hole position also has different degrees of near cupola well position Erosion, peeling phenomenon;Tuyere zone fire resisting liner body is washed away because of high temperature corrode, furnace charge abrasion, high pressure draught, occurs thinning or uneven Phenomenon (tuyere zone bottom depth of erosion reaches 220mm);Shaft (containing bosh, furnace bosh position) fire resisting liner body is because of high temperature corrode, furnace charge , there is thinning or non-uniform phenomenon in abrasion, the impact of high pressure draught, blast-furnace shaft liner corrodes, peels off more seriously, in shaft Lining protection silicon nitride combined silicon carbide brick (bosh bottom), phosphorus leaching leck brick are peeled off substantially and are finished, cooling wall inlaid brick (nitrogen SiClx silicon carbide matter) also corrode serious (corroding thickness reaches 1/3~1/2).
More than tuyere combined brick 2 sections of cooling wall inlaid bricks still exist, but protect from the liner of three-stage cooling wall to throat armour Brick substantially completely comes off, and cooling wall dovetail groove appears, and especially the 4th section cooling wall is impaired seriously to have seepy question, has lost Remove normal refrigerating function (this section of cooling wall is all changed before integrated poured construction operation);Tuyere combined brick region, in Heart line combination of the above brick corrodes damage seriously, and the following modular tile of centrage has part and damages and loosen;Tuyere zone bottom cupola well Brick fuel, tuyere combined brick lower edge is to following 1.5m region, and diametrically depth of erosion reaches 200~300mm to brick fuel.Exist certain Potential safety hazard.
2 blast furnace crucibe of table, shaft recovery project Specific construction timetable
Carried out after construction reparation using the method for the present invention, the basic recovery initial designs type of furnace, through integrated poured, naturally dry Dry, baking, cast liner body intensity is high, good integrity.No scaling defects are layered, are conducive to blast furnace normally to run, it is ensured that in blast furnace The globality of lining refractories, substantially reduces the abrasion of the resistance to material of blast furnace lining, breakage, peeling phenomenon, effectively extends making for blast furnace With the life-span, it is worth with higher Technological Economy and benefit.
The present invention is not limited to above-mentioned embodiment, for those skilled in the art, without departing from On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.

Claims (10)

1. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick, it is characterised in that including following step Suddenly:
S1, determine the damaged part of blast furnace crucibe, shaft, the cupola well includes tapping hole and tuyere zone, and the shaft includes stove Abdomen and furnace bosh, cleaning cupola well and shaft;
S2, preparation castable:Wherein, cupola well, bosh, furnace bosh and restoration of lower stack, upper shaft are respectively adopted high-strength superfine powder knot Conjunction corundum-SiC matter castable, high-strength superfine powder combined corundum-SiC matter castable, high-strength superfine powder are poured with reference to high alumina-SiC matter Material feeding and high-strength superfine powder combine high alumina-mullite castable;
S3, model sheetinstallat:Cupola well, shaft construction formwork/mould are installed inside blast furnace from the bottom to top;
S4, integrated poured:Take vibrations or the method for gravity flow pouring molding to pour into a mould castable from the bottom to top, form cast liner body;
S5, the demoulding:From top to bottom cast template/mould and other structural members, support member is removed, be beneficial to castable dehydration, hard Change;
S6, natural drying and baking:After the hardness of liner body to be cast reaches requirement, form removal/mould and through spontaneously dry and Baking, makes cast liner body slough moisture, reaches certain intensity.
2. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 1, which is special Levy and be:The reparation thickness at the cupola well position is not less than 200mm;The reparation thickness at the shaft position is not less than 100mm, or So that the size restoration of blast furnace lining is to identical with initial designs size and the type of furnace.
3. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 1, which is special Levy and be:The cupola well includes tapping hole and tuyere zone, and the shaft includes bosh and furnace bosh, clears up cupola well in step S1 Following steps are specifically included with shaft:After confirming that job site reaches safe construction condition, using oxyacetylene metal-cutting, pneumatic pick, drill rod etc. Equipment or instrument, will be clean to the coke in cupola well and the complete liquidation of slag iron mixture, by cupola well, tapping hole, tuyere zone inwall Residual ferrum, residue are cleaned out, and cupola well position should be cleared up to brick fuel position, until the brick fuel at position to be repaired is exposed out;Or Cleaning till death iron layer with upper bit;
Using the equipment such as pneumatic pick, drill rod or instrument, the residual ferrum of blast-furnace shaft inner lining surface, residue are cleaned out, and will loosen Refractory material, including refractory brick and spray paint, clean out, manifest until repairing the fire resisting liner body at position and cooling wall Come.
4. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 3, which is special Levy and be:Further comprising the steps of before step S3:Blast Furnace Bottom or the above position of ladle heel layer are patted whole, install Before blast furnace lining template/mould, the blast furnace lining includes cupola well and shaft, smears one layer of oxygen in blast furnace lining material surface Change coating;Meanwhile, smear one layer of miscella in template/mould inner wall against the one side of cast liner body, miscella be butter and Used oil is according to 2:1 ratio is made.
5. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 3, which is special Levy and be:When tuyere zone is poured into, install tuyere zone template/mould, install tuyere zone template/mould when should be noted that furnace shell and The fixation of cupola well template/mould, the thickness of tuyere zone castable liner body is not less than 200mm, i.e., deteriorated degree according to tuyere zone, make Castable liner body is recovered to size or the thickness of the initial type of furnace of newly-built blast furnace.
6. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 3, which is special Levy and be:Tuyere zone template/the mould is made not less than 3mm steel plate using thickness or is made using wood materials.
7. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 1, which is special Levy and be:When installing cupola well, shaft construction formwork/or mould in step S3 from the bottom to top, the height installed every time is 1~ 3m.The actual height that installs every time should be determined according to the height of the calibrated altitude of template/mould or place position cast liner body.Mould Plate/mould can adopt steel material, and wood materials may also be employed;Steel and wood materials can also be adopted to replace, arranging in pairs or groups is carried out.
8. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 7, which is special Levy and be:When installing cupola well, shaft construction formwork/mould in step S3 from the bottom to top, the height that installs every time is usually 1.5m.
9. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 1, which is special Levy and be:The installation blast furnace crucibe, shaft template/mould are further comprising the steps of:In blast furnace crucibe shaft template/mould Non- casting area, arranges support member using steel construction, for support shuttering/mould.
10. a kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick as claimed in claim 1, which is special Levy and be:The installation blast furnace crucibe, shaft template/mould are further comprising the steps of:In blast furnace crucibe, shaft template/mould The top of casting area, arranges support member, for support shuttering/mould.
CN201611001478.1A 2016-11-11 2016-11-11 A kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick Active CN106435073B (en)

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CN111876538A (en) * 2020-07-31 2020-11-03 北京首钢股份有限公司 Blast furnace bottom integral pouring repair structure and construction method
CN112123544A (en) * 2020-09-19 2020-12-25 河南华西耐火材料有限公司 Construction method of integrated full-cast refractory structure applied to blast furnace lining

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CN111876538A (en) * 2020-07-31 2020-11-03 北京首钢股份有限公司 Blast furnace bottom integral pouring repair structure and construction method
CN112123544A (en) * 2020-09-19 2020-12-25 河南华西耐火材料有限公司 Construction method of integrated full-cast refractory structure applied to blast furnace lining

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