CN106699205A - Sol-bonded wet-process spray coating for blast furnace lining and preparation method of sol-bonded wet spray coating - Google Patents
Sol-bonded wet-process spray coating for blast furnace lining and preparation method of sol-bonded wet spray coating Download PDFInfo
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- CN106699205A CN106699205A CN201611219909.1A CN201611219909A CN106699205A CN 106699205 A CN106699205 A CN 106699205A CN 201611219909 A CN201611219909 A CN 201611219909A CN 106699205 A CN106699205 A CN 106699205A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
Abstract
The invention provides a sol-bonded wet spray coating for a blast furnace lining and a preparation method of the sol-bonded wet spray coating. The spray coating comprises the following raw materials in parts by weight: less than or equal to 30 parts of silicon carbide, less than or equal to 80 parts of high alumina material, less than or equal to 60 parts of mullite, less than or equal to 60 parts of flint clay, 3-20 parts of alumina powder, 3-20 parts of silica fume, less than or equal to 5 parts of clay, 0.5-5 parts of resin powder, 0.02-1 part of organic fiber, less than or equal to 1 part of an interface agent, 0.01-0.2 part of a coagulation accelerator, 0.02-0.2 part of a dispersing agent and 8-12 parts of sol. The sol-bonded wet spray coating for the blast furnace lining and the preparation method thereof provided by the invention have the benefits that the use performance of the material is greatly improved, the service life of the material for construction is long, and the molten slag corrosion resistance and the erosion resistance are good, so that a contribution is made for high efficiency and long service life of a blast furnace.
Description
Technical field
The present invention relates to fire resisting material field, and in particular to a kind of colloidal sol combination blast furnace lining wet spray material and preparation side
Method.
Background technology
Blast furnace is the smelting equipment for being chronically at continuous high temperature production, and in longtime running, blast furnace lining is suffered erosion, shelled
Drop out current situation portion or large area is damaged, influence blast furnace normally runs.In order that blast furnace reaches long-lived, efficient purpose, extension is high
Furnace li` is always to smelt the problem that engineers and technicians are concerned about, prolonging campaign is one of Ironmaking Technology Development Based alignment target.Mesh
The preceding country has started to generally make lining technology using wet spraying, and technical characterstic is that blast furnace staying pair is utilized on the premise of not blowing out
Liner carries out spray repair.Wet spraying makes lining compared with original traditional blowing out is repaired, and it has easy construction, takes less, goes into operation
Fast the characteristics of.Wet injection technology material therefor stirs to form mortar shape castable in advance according to design amount of water, this cast
Expect that the accelerator with atomization at gun slot mixes ejection, closely attach treating instantaneous the losing flowability of spray plane upper material；
Wet injection technology in the absence of water with expect the problem that mixes in muzzle moment, it is entirely avoided dry method and semidry method spraying technology
Drawback, with following feature：
1. stirring in advance, amount of water can be by design metering addition, and the mortar castable for stirring, anhydrous material separates existing
As sprayed coating is homogeneous closely knit；
2. enough mixings time enable diminishing dispersant effect to give full play to, and amount of water can be with equal castable phase
When；
3. without dust during spray；Springback capacity is extremely low (only 5% or so), can well ensure former grain composition design；Therefore
The effect of spray is accessible or reaches formwork vibrating casting level；
4. the critical granularity of jetting material reaches normal pouring material critical granularity 5-8mm, therefore material has and castable phase
Nearly structural behaviour.
That current wet coating techniques are used is all the Al that cement is combined2O3-SiO2- SiC system spray paints, cement contains
, 10% or so, because cement is largely present, material is poor in high temperature field strength, while during applied at elevated temperature in matrix for amount
Liquid phase it is relatively more, the resistance to chemical attack, air-flow or the material erosion that cause material are weaker, rigidity bond material toughness
Poor, service life is shorter.
The content of the invention
In order to solve the above problems, the invention provides a kind of colloidal sol combination blast furnace lining wet spray material and preparation side
Method, solves ordinary cement combination spray paint high temperature low intensity, high temperature durability is poor, material impact resistance is poor, matrix high temperature anti-
The defects such as aggressivity difference, improve the intensity during materials'use, reduce erosion of the scum melt to material, improve materials'use
Life-span.
Colloidal sol combination blast furnace lining wet spray material of the present invention, by mass percentage, its raw material composition is as follows：
Carborundum：Less than or equal to 30 weight portions,
High aluminium material：Less than or equal to 80 weight portions,
Mullite：Less than or equal to 60 weight portions,
Flint clay：Less than or equal to 60 weight portions,
Alumina powder：3-20 weight portions,
Silicon ash：3-20 weight portions,
Clay：Less than or equal to 5 weight portions,
Resin-oatmeal：0.5-5 weight portions,
Organic fiber：0.02-1 weight portions,
Interfacial agents：Less than or equal to 1 weight portion,
Coagulant：0.01-0.2 weight portions,
Dispersant：0.02-0.2 weight portions,
Colloidal sol：8-12 weight portions.
Preferably, the raw material also includes carborundum, purity >=96.5% of the carborundum, granularity<200 mesh, 0-30
Weight portion.
Preferably, the mullite is fused mullite, 3Al2O3-2SiO2Content：60%-65%, granularity be particle or
200 mesh fine powders.
Preferably, the silicon ash, SiO2Purity >=94%.
Preferably, the high aluminium material is that one or two that sinter in alumina or electro-corundum are combined.
Preferably, the carbon containing resin-oatmeal is that Rui Jia companies of Germany produce the carbon containing resin-oatmeal of Carbores P series of products, drip
Blue or green modified resin, wherein carbon content are more than 80%.
Preferably, the dispersant is one or more in sodium tripolyphosphate, calgon and sodium polyphosphate.
Preferably, the coagulant be magnesia, aluminum sulfate, Alkylenediamine or triamine in one or more be combined.
Preferably, the colloidal sol SiO2Content >=39.5%, pH value 8.5-9.5.
The preparation method of colloidal sol combination blast furnace lining wet spray material of the present invention, comprises the following steps：
1) raw material have been weighed with compositional purity in mass ratio；2) load weighted solid raw material is put into machine,massing
In, it is dry-mixed to well mixed；
3) material is screened and colloidal sol dosage is checked after mixing, and qualified rear dress bag forms product；
4) at the scene spraying application when, by adding 8-10% sol binders in machine,massing, stirring is to fully mixed
Close；
5) colloidal sol addition is adjusted, qualified colloidal sol combination blast furnace lining wet method is formed after material slamp value to be detected is qualified
Spray paint, being sent by pumping to construction surface carries out spraying application.
The technology of the present invention effect is as follows：
1st, being combined using colloidal sol in the present invention replaces common aqua to combine, and purifies matrix of materials, reduces the condition of high temperature
Liquid phase in lower matrix, the particularity of colloidal sol dehydration optimizes the matrix structure of spray paint, and the anti-slag iron for not only improving material is invaded
Corrosion energy, while reducing the baking time of the material after construction, conventional wet spray paint baking time is more than 48 hours, and this hair
Bright colloidal sol combination wet spray material baking time is less than 24 hours, greatly shortens construction period, is the energy-efficient production of blast furnace
There is provided and ensure.
2nd, the carbon containing resin-oatmeal of present invention addition (German Rui Jia companies produce Carbores P or asphalt modification resin) is formed with
Machine-inorganic composite materials, increases toughness of material, improves the impact property of the anti-air-flow and material during materials'use.Simultaneously
The carbon network structure reduction slag iron formed after coking containing carbon resin to the wetability of material, the anti-erosion of material, resistance to erosion and
Compactness is improved, and adds the erosion-resisting characteristics raising 5-10% of material after carbon containing resin-oatmeal.
3rd, coagulant of the present invention be magnesia, aluminum sulfate, Alkylenediamine or triamine in one or more be combined.Pass through
The pH value of change system, accelerates the process of sol-gel-dehydration, is conducive to the presence of collosol structure in matrix after colloidal sol dehydration,
Optimize the microstructure of matrix, improve the refractoriness of material, air penetrability is doubled, and apparent porosity reaches more than 25%, anti-ization
Learning erosion physics damageability can improve.
4th, inventive dispersant is one or more in sodium tripolyphosphate, calgon and sodium polyphosphate；Colloidal sol
Add dispersant with reference to spray paint, reduce material agglomeration and occur, sol binder dosage reduces 20%, material it is uniform
Degree and intensity are strengthened, and 110 DEG C of drying rupture strengths bring up to 2.5MPa by original 1.5MPa.
5th, the addition of interfacial agents of the present invention, changes the technical thought of material traditional material " with Qiang Keqiang ", by blast furnace slag
Skin physical chemistry behavioral study, makes the slag crust present in blast furnace production process be and exists with Dynamic Two-dimensional dynamic " viscous layer ",
The introducing of interfacial agents can control the performances such as thickness, viscosity, the physical chemistry of viscous layer, effectively suppress the phase between solid-liquid element
Mutually infiltration and erosion, reduces melting slag iron to solid material chemical erosion, improves refractory material high temperature resistance melt permeability, melt
Dystectic interface barricade being formed with refractory material, preventing slag from penetrating into, anti-slag iron erosion ratio has original to be reduced more than 4%
To less than 3%.
The blast furnace lining spray paint that colloidal sol of the present invention is combined, bonding agent is made using colloidal sol, material not cement, work progress
Without water, due to the special construction and physical and chemical performance of colloidal sol, cement combination spray paint is overcome to be asked using present in process
Topic, greatly improves the active time after the maintenance of blast furnace lining wet spray.Colloidal sol combination blast furnace lining wet spray material not only has
There is the convenient of normal wet spraying application, and avoid its defect, improve the various performances of material.Therefore, the present invention is to height
The direct motion of stove, efficient, long-lived offer guarantee, are that blast furnace lining reconstruction repairing technique raising lays the foundation.
Specific embodiment
Embodiment of the present invention will be described below.One of ordinary skill in the art will recognize, without departing from
In the case of the spirit and scope of the present invention, described embodiment can be repaiied with a variety of modes or its combination
Just.
Wet spray material of the invention, by mass percentage, its raw material composition is as follows：
Carborundum：Less than or equal to 30 weight portions,
High aluminium material：Less than or equal to 80 weight portions,
Mullite：Less than or equal to 60 weight portions,
Flint clay：Less than or equal to 60 weight portions,
Alumina powder：3-20 weight portions,
Silicon ash：3-20 weight portions,
Clay：Less than or equal to 5 weight portions,
Resin-oatmeal：0.5-5 weight portions,
Organic fiber：0.02-1 weight portions,
Interfacial agents：Less than or equal to 1 weight portion,
Coagulant：0.01-0.2 weight portions,
Dispersant：0.02-0.2 weight portions,
Colloidal sol：8-12 weight portions.
The carbon containing resin-oatmeal produces Carbores P, carbon containing resin-oatmeal, asphalt modification resin etc., wherein carbon content for Germany
More than 80%.
The mullite is fused mullite, wherein mullite phase (3Al2O3-2SiO2) content be more than 60%.
The alumina powder is An Mai companies CL370 or CTC20.
Described high aluminium material is sintering alumina (Al2O3Content >=85%) or fused brown corundum (Al2O3Content >=95%)
In any one or two kinds of combination.
The dispersant is one or more in sodium tripolyphosphate, calgon and sodium polyphosphate.
The coagulant is compound one or more in magnesia, aluminum sulfate, Alkylenediamine or triamine.
The colloidal sol SiO2Content >=39.5%, pH value 8.5-9.5.
The interfacial agents are TiO2And Si3N4Mixture, proportion is 1:4-1:1.
The flint clay is a kind of high-quality hard fire clay, the flint clay raw ore Al of standard2O3Content 38%, after calcining
Al2O3Content is 44% or so, Fe2O3<1.5%, stable components, homogeneous, compact structure, section is in conchoidal, white,
For producing tonerde fire resistant materials.
The preparation method of colloidal sol combination blast furnace lining wet spray material of the present invention, comprises the following steps：
1) raw material have been weighed with compositional purity in mass ratio；2) load weighted solid raw material is put into machine,massing
In, dry-mixed 3~5 minutes to well mixed；
3) material is screened and colloidal sol dosage is checked after mixing, and qualified rear dress bag forms product；
4) at the scene spraying application when, in machine,massing by add 8-10% sol binders, stirring 5-8 minutes extremely
It is sufficiently mixed；
5) colloidal sol addition is adjusted, material slamp value to be detected qualified (>=190mm) forms qualified colloidal sol and combines height afterwards
Inner lining of furnace wet spray material, being sent by pumping to construction surface carries out spraying application.
Above step 1) -3) colloidal sol that is formed is individually placed, and 4) and 5) other components are placed together, are applied subsequently into scene
Work step is rapid.
Combined using colloidal sol in the present invention and replace common aqua combination blast furnace lining wet spray material, purified material base
Matter, the liquid phase under the reduction condition of high temperature in matrix, the particularity of colloidal sol dehydration optimizes the matrix structure of spray paint, not only improves
The anti-slag iron erosion performance of material, while reducing the baking time of the material after construction, greatly shortens construction period.Add simultaneously
Plus carbon containing resin-oatmeal (Germany produces Carbores P or asphalt modification resin) forms composite organic-inorganic material, increases material tough
Property, improve the impact property of the anti-air-flow and material during materials'use, the carbon network knot formed after coking containing carbon resin
To the wetability of material, the anti-erosion of material, resistance to erosion and compactness are improved structure reduction slag iron.Change material traditional material
The technical thought of " with Qiang Keqiang ", by blast furnace slag crust physical chemistry behavioral study, makes the slag present in blast furnace production process
Skin is present with Dynamic Two-dimensional dynamic " viscous layer ", by adjustment interface agent, controls thickness, viscosity, the physical chemistry of viscous layer
Etc. performance, effectively suppress interpenetrating between solid-liquid element and corrode, reduce melting slag iron to solid material chemical erosion, carry
Refractory material high temperature resistance melt permeability high, melt can form dystectic interface barricade with refractory material, prevent slag from penetrating into.
Table 1 is the cement combination spray paint and spray paint performance comparison of the present invention of prior art.In same Al2O3 and
In the case of SiC content, spray paint of the present invention is compared with existing cement combination spray paint, and the performance of top material and bottom material is obvious
Improve, different temperatures performance, workability and performance are all greatly improved, effect is obvious, its comparing result such as table 1.
The cement combination spray paint of table 1 and spray paint performance comparison of the present invention
Wet spray material is different using position, and the mechanism of its material damage is different：During top material is main low temperature wear resistance and
Thermal shock resistance, slag iron chemical erosion is caused, it is necessary to high temperature resistant erosion performance and heat conduction under the damage of bottom material is mainly high temperature
Performance.So to expect that Al2O3 contents are required than bottom material low on top, and because SiC prices are higher, top material can not also add
Plus SiC.
The raw material of colloidal sol combination blast furnace lining each embodiment of wet spray material of the invention and its containing of measuring by weight
Amount is as listed in table 2.
Each embodiment of table 2
The manufacture method of each embodiment is identical, and it is as follows that it manufactures its method：
1) raw material have been weighed with compositional purity in mass ratio；
2) load weighted solid raw material is put into machine,massing, and dry-mixed 3~5 minutes to well mixed；
3) material is screened and colloidal sol dosage is checked after mixing, and qualified rear dress bag forms product.
4) at the scene spraying application when, by adding sol binder, stirring 5-8 minutes is to being sufficiently mixed；
5) colloidal sol addition is adjusted, sprayable construction product is formed after detection material slamp value is qualified.
Spray paint prepared by embodiment 1-6, is molded, after the demoulding by the Standard Module in 40mm × 40mm × 160mm
After 110 DEG C are carried out to test block in electric furnace drying and processing and 1450 DEG C of heat treatment, according to the regulation in country/professional standard
The performance indications such as anti-folding, compressive resistance performance indications, Linear change rate are determined, is as a result shown in table 3 below.
The patented product performance indications of table 3
In sum, combined using colloidal sol in the present invention and replace common aqua combination blast furnace lining wet spray material, added
Plus carbon containing resin-oatmeal (Germany produces Carbores P or asphalt modification resin) forms composite organic-inorganic material, changes material and passes
The technical thought of commons material " with Qiang Keqiang ", by blast furnace slag crust physical chemistry behavioral study, makes to be deposited in blast furnace production process
Slag crust be exist with Dynamic Two-dimensional dynamic " viscous layer ", by adjustment interface agent, control thickness, viscosity, the thing of viscous layer
The performances such as Physicochemical, effectively suppress interpenetrating and corrode between solid-liquid element, reduce melting slag iron to solid material chemistry
Corrode, improve refractory material high temperature resistance melt permeability, melt can form dystectic interface barricade with refractory material, prevent molten
Slag penetrates into.Colloidal sol combination blast furnace lining wet spray material normal temperature of the invention high-temperature behavior is good, long service life, easy construction
Quick the advantages of, with good economic benefit and social benefit.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of colloidal sol combination blast furnace lining wet spray material, it is characterised in that by weight, its raw material composition is as follows：
Carborundum：Less than or equal to 30 weight portions,
High aluminium material：Less than or equal to 80 weight portions,
Mullite：Less than or equal to 60 weight portions,
Alumina powder：3-20 weight portions,
Silicon ash：3-20 weight portions,
Clay：Less than or equal to 5 weight portions,
Resin-oatmeal：0.5-5 weight portions,
Organic fiber：0.02-1 weight portions,
Interfacial agents：Less than or equal to 1 weight portion,
Coagulant：0.01-0.2 weight portions,
Dispersant：0.02-0.2 weight portions,
Colloidal sol：8-12 weight portions.
2. spray paint according to claim 1, it is characterised in that：The raw material also includes carborundum, the carborundum
Purity >=96.5%, granularity<200 mesh, 0-30 weight portions.
3. spray paint according to claim 1, it is characterised in that：The mullite is fused mullite, 3Al2O3-2SiO2
Content：60%-65%, granularity is particle or 200 mesh fine powders.
4. colloidal sol combination blast furnace lining wet spray material according to claim 1, it is characterised in that：The silicon ash, SiO2It is pure
Degree >=94%.
5. spray paint according to claim 1, it is characterised in that：
The high aluminium material is that one or two that sinter in alumina or electro-corundum are combined.
6. spray paint according to claim 1, it is characterised in that：The resin-oatmeal be carbon containing resin-oatmeal, C content >=
80%.
7. spray paint according to claim 1, it is characterised in that：The dispersant is sodium tripolyphosphate, calgon
With one or more in sodium polyphosphate.
8. spray paint according to claim 1, it is characterised in that：The coagulant is magnesia, aluminum sulfate, alkylidene two
It is combined for one or more in amine or triamine.
9. spray paint according to claim 1, it is characterised in that：The colloidal sol SiO2Content >=39.5%, pH value 8.5-
9.5。
10., according to any described colloidal sol combination blast furnace lining wet spray preparation method for material of claim 1-9, its feature exists
In comprising the following steps：
1) raw material have been weighed with compositional purity in mass ratio；2) load weighted solid raw material is put into machine,massing, is done
Mix to well mixed；
3) material is screened and colloidal sol dosage is checked after mixing, and qualified rear dress bag forms product；
4) at the scene spraying application when, by 8-10% sol binders are added in machine,massing, stirring is to being sufficiently mixed；
5) colloidal sol addition is adjusted, qualified colloidal sol combination blast furnace lining wet spray is formed after material slamp value to be detected is qualified
Material, being sent by pumping to construction surface carries out spraying application.
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| CN111072377A (en) * | 2020-01-06 | 2020-04-28 | 郑州市瑞沃耐火材料有限公司 | Carbon composite blast furnace iron runner castable |
| CN114292098A (en) * | 2021-12-29 | 2022-04-08 | 江苏材睿科技有限公司 | Anti-erosion wear-resistant ceramic spray coating for rotary kiln and preparation method and process thereof |
| CN114890802A (en) * | 2022-05-31 | 2022-08-12 | 湛江自立高温材料有限公司 | Slag adhesion preventing spray coating suitable for smelting clean steel and preparation method and application thereof |
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