CN106904981B - A kind of ladle backpack cover light mullite pouring material and preparation method thereof - Google Patents
A kind of ladle backpack cover light mullite pouring material and preparation method thereof Download PDFInfo
- Publication number
- CN106904981B CN106904981B CN201710174037.XA CN201710174037A CN106904981B CN 106904981 B CN106904981 B CN 106904981B CN 201710174037 A CN201710174037 A CN 201710174037A CN 106904981 B CN106904981 B CN 106904981B
- Authority
- CN
- China
- Prior art keywords
- mullite
- parts
- backpack cover
- light
- ladle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9676—Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a kind of ladle backpack cover light mullite pouring materials, including aggregate and matrix, according to parts by weight include: aggregate: 30~70 parts of light-weight mullite ball, matrix: 0~15 part of plate diamond spar, 0~15 part of mullite particle, 5~15 parts of alumina powder, 5~15 parts of mullite miropowder, 0~8 part of silicon powder, 5~15 parts of bonding agent, 0.1~0.4 part of water-reducing agent.The invention also discloses a kind of preparation methods of ladle backpack cover light mullite pouring material, comprising: is first uniformly mixed base portion, adds light-weight mullite ball, is uniformly mixed packaging.Ladle backpack cover light mullite pouring material has the features such as production is simple, high production efficiency, site operation are convenient, bulk density is low, thermal coefficient is low, and thermal shock resistance is excellent, intensity is high, high volume stability is good and is up to 1550 DEG C using temperature.
Description
Technical field
The invention belongs to fire resisting material fields, and in particular to a kind of ladle backpack cover light mullite pouring material and its preparation side
Method.
Background technique
In modern steel production, energy-saving is key subjects to steel-making industry, and especially current environmental issue is severe,
Steel excess capacity, iron and steel enterprise's profit is low, and energy-saving to be paid more and more attention, the development gram of lightening casting material is not allowed to delay.Mesh
Preceding light thermal-insulation castable is many kinds of, is mainly reduced by increasing the apparent porosity in castable, reduction bulk density
The thermal coefficient of castable.But the strength reduction and mechanical behavior under high temperature that will lead to lightening casting material are improved there are apparent porosity
The problem of difference, can only use under lower temperature (1300 DEG C).Exploitation can be poured in 1300 DEG C of high-strength lights used above
Material feeding becomes focus on research direction.
With the development of steel-smelting technology, ladle takes full stroke covering technology to have become a kind of energy-saving important side
Method.Ladle stamp can substantially reduce the temperature drop of molten steel, guarantee the temperature of molten steel, and tapping temperature height and ladle is avoided to melt down repeatedly
The problem of heating and molten steel freeze packet, it is energy-saving to achieve the purpose that.The backpack cover castable of ladle requires have excellent resist
Thermal shock performance, low thermal conductivity (will be enough to resist steel ladle cover using temperature high (temperature is higher than 1500 DEG C) and higher intensity
Shake in allocation and transportation repeatedly) the features such as, to resist the radiant heat of molten steel repeatedly in use.
Currently, the first is refractory fiber cotton there are mainly two types of the backpack cover castables of normal use, second is heavy packet
Cover pouring material.Refractory fiber cotton is that cellucotton is fixed on backpack cover using anchoring piece, is existed using after being divided into certain size
Constructional difficulties, security and stability is poor, and shrinkage seam, the low problem of service life are easy to appear in use process；The casting of heavy backpack cover
Material there is a problem of that backpack cover weight is bigger than normal, be easy to cause ladle occur ladle be more than driving freight weight limit, can not handling and it is offline.Simultaneously
Heavy backpack cover thermal shock resistance is poor, and service life is relatively low.
That there are intensity is low for current lightening casting material, and using the low problem of temperature, in work progress, amount of water is big and flowing
The problems such as property is poor, can not use in ladle backpack cover.
The Chinese patent literature of 105622112 A of Publication No. CN discloses a kind of high-strength light heat-preserving castable, should
Method is with aglite 30-50%, expanded perlite 10-20%, cement 5-10%, silicon dioxide ultrafine powder 5-10%, solid
Waterglass 1-3%, alumina silicate fibre 0.5-1%, low using temperature, maximum operation (service) temperature can only be within 1300 degree；
Notification number is that the Chinese patent literature of 102503467 B of CN discloses light heat insulating castable, primary raw material
Including glass bead, closed perlite, floating bead, golf type mullite hollow spheres, silicon ash, white clay, ceramic dust-removing powder, high aluminum water
In addition mud, solid water glass are also added with dispersing agent and aluminium silica solution in castable.In addition silicon is also added in the castable
Sour aluminum fiber, intensity is low, low using temperature；
The Chinese patent literature of 106278295 A of Publication No. CN discloses a kind of lightweight heat-proof castable and its preparation
Method prepares gained, haydites of book structure, floating bead, silicon dioxide powder, flint clay, high alumina cement, magnesia powder, work by following raw material
Property alumina, sulfuric acid aluminium powder.Lightweight heat-proof castable provided by the invention, can be good with high temperature resistant, heat insulation effect, and intensity height,
Density is small, hardening is fast, meets the requirement of steel production high temperature, low using temperature.
Summary of the invention
The present invention is directed to overcome the deficiencies of existing technologies, it is therefore an objective to which providing a kind of has simple production, high production efficiency, existing
Field is easy for construction, amount of water is low, application property is good, bulk density is low, thermal coefficient is low, and thermal shock resistance is excellent, intensity is high, high temperature
The ladle backpack cover light mullite pouring material for the features such as volume stability is good and is up to 1550 DEG C using temperature.
To achieve the above object, the technical scheme adopted by the invention is that:
A kind of ladle backpack cover light mullite pouring material, including aggregate and matrix include: according to parts by weight
Aggregate: 30~70 parts of light-weight mullite ball,
Matrix: 0~15 part of plate diamond spar, 0~15 part of mullite particle, 5~15 parts of alumina powder, mullite miropowder 5
~15 parts, 0~8 part of silicon powder, 5~15 parts of bonding agent, 0.1~0.4 part of water-reducing agent.
For the present invention using light-weight mullite ball as aggregate, light-weight mullite ball has intensity height and the low spy of water absorption rate
The ladle backpack cover light mullite pouring material amount of water of point, preparation is low, with bulk density is low, thermal coefficient is low, workability
Well, the features such as thermal shock resistance is excellent, intensity is high, high volume stability is good and is up to 1550 DEG C using temperature, is that heavy pours
Material feeding, refractory fiber cotton and other lightening casting materials are unapproachable.
The light-weight mullite ball is to wait partial sizes spheric granules, and particle size range is 8~0.1mm, the bulk density of ball
For 1.8~1.2g/cm3, apparent porosity be 25~70%, water absorption rate be lower than 25%, prepare castable amount of water be 6~
9wt%.The water absorption rate of conventional lightweight mullite particle is 35~40%, in work progress amount of water generally in 15~25wt%,
The problems such as depositing big amount of water in the construction process and poor fluidity, can not use, while will lead to lightweight and pouring in ladle backpack cover
The strength reduction and mechanical behavior under high temperature of material feeding decline, and can only use at a lower temperature.
The Al of the plate diamond spar2O3Content >=99%, bulk density are greater than 3.50g/cm3。
The Al of the mullite particle2O3Content >=55%, partial size are 5~0mm.
The alumina powder is calcined alumina micro mist or Reactive alumina, partial size D50≤5um.
The mullite miropowder is calcined mullite micro mist, partial size D50≤5um.
The SiO of the silicon powder2Content >=90%, partial size D50≤2um.
The bonding agent is aluminous cement, p-Al2O3At least one of with silica solution.
The water-reducing agent is the mixture or polycarboxylate water-reducer of sodium tripolyphosphate and calgon.
Preferably, the ladle backpack cover light mullite pouring material includes: according to parts by weight
Aggregate: 50~70 parts of light-weight mullite ball,
Matrix: 0~15 part of mullite particle, 5~15 parts of alumina powder, 5~15 parts of mullite miropowder, silicon powder 0~4
Part, 5~8 parts of bonding agent, 0.1~0.4 part of water-reducing agent.
Further preferably, the ladle backpack cover light mullite pouring material includes: according to parts by weight
Aggregate: 50~65 parts of light-weight mullite ball,
Matrix: plate diamond spar 0~15%, 0~10 part of mullite particle, 5~10 parts of alumina powder, mullite miropowder 5
~15 parts, 0~4 part of silicon powder, 5~8 parts of bonding agent, 0.1~0.4 part of water-reducing agent.
In the preferred scope, the ladle backpack cover light mullite pouring material bulk density is low, thermal coefficient is low, heat resistanceheat resistant
Shock stability is excellent, intensity is high, high volume stability is good and is up to 1550 DEG C using temperature.
The bulk density of the ladle backpack cover light mullite pouring material is 1.8~2.4g/cm3, apparent porosity be 30~
50%, thermal coefficient is 0.250~0.675W/ (mK) at 500 DEG C, and compressive resistance is 20~50MPa for 24 hours for 110 DEG C of processing, is resisted
Folding intensity is 3~7MPa；1550 DEG C of processing 3h compressive resistances are 35~60MPa, and flexural strength is 8~14MPa, remaining line variation
Rate is -0.5~0.8%.
A kind of preparation method of above-mentioned ladle backpack cover light mullite pouring material, comprising: first base portion is uniformly mixed,
Light-weight mullite ball is added, packaging is uniformly mixed.
In job location, uniformly mixed balk cargo is put into blender, adds 6~9wt% of water, stirs 3~5min, tool
After having preferable mobility, mold position i.e. to be cast is poured into, or directly smear construction.24~48h of room temperature natural curing
Carry out baking processing.
Due to the adoption of the above technical scheme, compared with prior art, the present invention having the following technical effect that
(1) present invention using 8~0.1mm light-weight mullite ball as aggregate, light-weight mullite ball have intensity height with
Water absorption rate is low, and the amount of water of the ladle backpack cover light mullite pouring material of preparation significantly reduces, and has and has good workability, anti-thermal shock
It has excellent performance, the features such as intensity is high, high volume stability is good and is up to 1550 DEG C using temperature.
(2) present invention uses pouring type to form, and has and produces simple, high production efficiency, site operation conveniently, and can
It is poured ladle backpack cover of different shapes, while ladle backpack cover can be repaired using local caburizing.
(3) ladle backpack cover light mullite pouring material prepared by the present invention is after testing: bulk density is 1.8~2.4g/
cm3, apparent porosity is 30~50%, and thermal coefficient is 0.250~0.675W/ (mK) at 500 DEG C, and 110 DEG C of processing are pressure-resistant for 24 hours
Intensity is 20~50MPa, and flexural strength is 3~7MPa；1550 DEG C of processing 3h compressive resistances are 35~60MPa, flexural strength 8
~14MPa, remaining Linear change rate are -0.5~0.8%.
Therefore the present invention is simple with production, high production efficiency, site operation are convenient, bulk density is low, thermal coefficient is low,
The features such as thermal shock resistance is excellent, intensity is high, high volume stability is good and is up to 1550 DEG C using temperature.
Specific embodiment
The present invention will be further described with reference to the examples below.
In order to avoid repeating, the raw material Unify legislation for being first related to present embodiment is as follows, will not in embodiment
It is repeating:
The light-weight mullite ball is to wait partial sizes spheric granules, and particle size range is 8~0.1mm, the bulk density of ball
For 1.8~1.2g/cm3, apparent porosity is 25~70%, and water absorption rate is lower than 25%；
The Al of the plate diamond spar2O3Content >=99%, bulk density are greater than 3.50g/cm3；
The Al of the mullite particle2O3Content >=55%；
The alumina powder is calcined alumina micro mist or Reactive alumina, partial size D50≤5um；
The mullite miropowder is calcined mullite micro mist, partial size D50≤5um；
The SiO of the silicon powder2Content >=90%, partial size D50≤2um.
Comparative example 1
A kind of ladle backpack cover heavy alumina matter castable, according to parts by weight: with 88 grades of 15~0mm, 57 parts of alumina for bone
Material, 5 parts of alumina powder, 5.5 parts of mullite miropowder, 1 part of silicon powder, 6 parts of bonding agent, 0.4 part of water-reducing agent is base portion.
First base portion is uniformly mixed, adds alumina particle, 3~5min of mixing is uniformly packed.It will mix equal
Blender is added in even balk cargo, and 6~8wt% of water is added, and stirs 3~4min, after having preferable mobility, pours into steel ladle cover
Middle vibrating casting molding, room temperature conserve 24~48h, can online baking use.
Bonding agent is aluminous cement in the present embodiment；Water-reducing agent is the mixture of sodium tripolyphosphate and calgon,
Mass ratio is 1:1.
Ladle backpack cover heavy alumina matter castable manufactured in the present embodiment is after testing: bulk density 2.85g/cm3, show
The porosity is 14%, and thermal coefficient is 0.75W/ (mK) at 500 DEG C, and compressive resistance is 40MPa for 24 hours for 110 DEG C of processing, and anti-folding is strong
Degree is 8MPa；1550 DEG C of processing 3h compressive resistances are 70MPa, flexural strength 13MPa, remaining Linear change rate is -1.0~-
0.5%, it shrinks under high temperature big.Backpack cover service life is up to 500 times.
Embodiment 1
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with 30 parts of light-weight mullite ball of 8~3mm
For aggregate, 5 parts of 15~0mm plate diamond spar, 5.5 parts of alumina powder, 5.5 parts of mullite miropowder, 1.5 parts of silicon powder, bonding agent
6.5 parts, 0.4 part of water-reducing agent are base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 6~8wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is aluminous cement in the present embodiment；Water-reducing agent is the mixture of sodium tripolyphosphate and calgon,
Mass ratio is 1:1.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 2.4g/cm3, show
The porosity is 30%, and thermal coefficient is 0.675W/ (mK) at 500 DEG C, and compressive resistance is 50MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 7MPa；1550 DEG C of processing 3h compressive resistances are 55MPa, flexural strength 14MPa, remaining Linear change rate is 0~
0.8%.In contrast to the heavy backpack cover in comparative example 1, backpack cover substance decline 15%.Backpack cover service life is up to 800 times.
Embodiment 2
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with 33 parts of light-weight mullite ball of 8~3mm
For aggregate, 5.5 parts of 15~0mm plate diamond spar, 5 parts of alumina powder, 5 parts of mullite miropowder, 1 part of silicon powder, 6 parts of bonding agent,
0.3 part of water-reducing agent is base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 6~8wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is aluminous cement in the present embodiment；Water-reducing agent is the mixture of sodium tripolyphosphate and calgon,
Mass ratio is 1:1.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 2.35g/cm3, show
The porosity is 33%, and thermal coefficient is 0.625W/ (mK) at 500 DEG C, and compressive resistance is 45MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 6MPa；1550 DEG C of processing 3h compressive resistances are 50MPa, flexural strength 13MPa, remaining Linear change rate is 0~
0.8%.In contrast to heavy backpack cover, backpack cover substance decline 15%.Backpack cover service life is up to 800 times.
Embodiment 3
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with 50 parts of light-weight mullite ball of 8~2mm
For aggregate, 10 parts of 5~0mm mullite particle, 8.5 parts of alumina powder, 3.5 parts of silicon powder, is combined 5.5 parts of mullite miropowder
7.5 parts of agent, 0.4 part of water-reducing agent is base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 6~8wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is p-Al in the present embodiment2O3；Water-reducing agent is the mixture of sodium tripolyphosphate and calgon, quality
Ratio is 1:1.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 2.00g/cm3, show
The porosity is 35%, and thermal coefficient is 0.400W/ (mK) at 500 DEG C, and compressive resistance is 30MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 6MPa；1550 DEG C of processing 3h compressive resistances are 50MPa, flexural strength 10MPa, remaining Linear change rate is 0~
0.8%.In contrast to heavy backpack cover, backpack cover substance decline 30%.Backpack cover service life is up to 1000 times.
Embodiment 4
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with 53 parts of light-weight mullite ball of 8~2mm
For aggregate, 10 parts of 5~0mm mullite particle, 8 parts of alumina powder, 5 parts of mullite miropowder, 3 parts of silicon powder, 7 parts of bonding agent,
0.3 part of water-reducing agent is base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 6~8wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 1.95g/cm3, show
The porosity is 38%, and thermal coefficient is 0.350W/ (mK) at 500 DEG C, and compressive resistance is 30MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 5MPa；1550 DEG C of processing 3h compressive resistances are 35MPa, and flexural strength 8MPa, remaining Linear change rate is 0~0.8%.
In contrast to heavy backpack cover, backpack cover substance decline 30%.Backpack cover service life is up to 1000 times.
Embodiment 5
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with the light-weight mullite ball 60 of 8~0.5mm
Part is aggregate, 8.5 parts of alumina powder, 5.5 parts of mullite miropowder, 3.5 parts of silicon powder, 8.5 parts of bonding agent, 0.3 part of water-reducing agent
For base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 6~8wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is aluminous cement in the present embodiment；Water-reducing agent is the mixture of sodium tripolyphosphate and calgon,
Mass ratio is 1:1.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 1.90g/cm3, show
The porosity is 40%, and thermal coefficient is 0.320W/ (mK) at 500 DEG C, and compressive resistance is 30MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 6MPa；1550 DEG C of processing 3h compressive resistances are 45MPa, flexural strength 10MPa, remaining Linear change rate is 0~
0.8%.In contrast to heavy backpack cover, backpack cover substance decline 33%.Backpack cover service life is up to 1200 times.
Embodiment 6
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with the light-weight mullite ball 63 of 8~0.5mm
Part be aggregate, 8 parts of alumina powder, 5 parts of mullite miropowder, 3.5 parts of silicon powder, 8.5 parts of bonding agent, 0.4 part of water-reducing agent be base
Matter part.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 6~8wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is aluminous cement in the present embodiment；Water-reducing agent is the mixture of sodium tripolyphosphate and calgon,
Mass ratio is 1:1.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 1.85g/cm3, show
The porosity is 43%, and thermal coefficient is 0.310W/ (mK) at 500 DEG C, and compressive resistance is 30MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 6MPa；1550 DEG C of processing 3h compressive resistances are 30MPa, and flexural strength 8MPa, remaining Linear change rate is 0~0.8%.
In contrast to heavy backpack cover, backpack cover substance decline 33%.Backpack cover service life is up to 1200 times.
Embodiment 7
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with the light-weight mullite ball 62 of 8~0.1mm
Part is aggregate, and 10 parts of 5~0mm mullite particle, 8.5 parts of alumina powder, 2 parts of silicon powder, combines 5.5 parts of mullite miropowder
8.5 parts of agent, 0.3 part of water-reducing agent is base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 5~7wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is silica solution in the present embodiment；Water-reducing agent is the mixture of sodium tripolyphosphate and calgon, quality
Ratio is 1:1.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 1.83g/cm3, show
The porosity is 45%, and thermal coefficient is 0.300W/ (mK) at 500 DEG C, and compressive resistance is 25MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 4MPa；1550 DEG C of processing 3h compressive resistances are 55MPa, flexural strength 15MPa, remaining Linear change rate is 0~
0.8%.In contrast to heavy backpack cover, backpack cover substance decline 45%.Backpack cover service life is up to 900 times.
Embodiment 8
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with the light-weight mullite ball 65 of 8~0.1mm
Part be aggregate, 8 parts of 5~0mm mullite particle, 8 parts of alumina powder, 5 parts of mullite miropowder, 2 parts of silicon powder, 8 parts of bonding agent,
0.4 part of water-reducing agent is base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 5~7wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is silica solution in the present embodiment；Water-reducing agent is the mixture of sodium tripolyphosphate and calgon, quality
Ratio is 1:1.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 1.80g/cm3, show
The porosity is 48%, and thermal coefficient is 0.290W/ (mK) at 500 DEG C, and compressive resistance is 25MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 4MPa；1550 DEG C of processing 3h compressive resistances are 50MPa, flexural strength 10MPa, remaining Linear change rate is 0~
0.8%.In contrast to heavy backpack cover, backpack cover substance decline 45%.Backpack cover service life is up to 900 times.
Embodiment 9
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with the light-weight mullite ball 70 of 8~0.1mm
Part be aggregate, 15 parts of 15~0mm plate diamond spar, 3 parts of 5~0mm mullite particle, 15 parts of alumina powder, mullite miropowder 15
Part, 15 parts of bonding agent, 0.1 part of water-reducing agent be base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 5~7wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is silica solution in the present embodiment；Water-reducing agent is polycarboxylate water-reducer.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 1.80g/cm3, show
The porosity is 50%, and thermal coefficient is 0.270W/ (mK) at 500 DEG C, and compressive resistance is 25MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 4MPa；1550 DEG C of processing 3h compressive resistances are 55MPa, flexural strength 14MPa, remaining Linear change rate is 0~
0.8%.In contrast to heavy backpack cover, backpack cover substance decline 45%.Backpack cover service life is up to 900 times.
Embodiment 10
A kind of ladle backpack cover light mullite pouring material, according to parts by weight: with the light-weight mullite ball 70 of 8~0.1mm
Part be aggregate, 3 parts of 15~0mm plate diamond spar, 15 parts of 5~0mm mullite particle, 5 parts of alumina powder, 5 parts of mullite miropowder,
10 parts of bonding agent, 0.3 part of water-reducing agent be base portion.
First base portion is uniformly mixed, adds aggregate light-weight mullite ball, 3~5min of mixing is uniformly packed.
Blender is added in uniformly mixed balk cargo, 5~7wt% of water is added, stirs 3~4min, after having preferable mobility,
Enter vibrating casting in steel ladle cover to form, room temperature conserves 24~48h, can online baking use.
Bonding agent is silica solution in the present embodiment；Water-reducing agent is polycarboxylate water-reducer.
Ladle backpack cover light mullite pouring material manufactured in the present embodiment is after testing: bulk density 1.80g/cm3, show
The porosity is 50%, and thermal coefficient is 0.255W/ (mK) at 500 DEG C, and compressive resistance is 25MPa, anti-folding for 24 hours for 110 DEG C of processing
Intensity is 3MPa；1550 DEG C of processing 3h compressive resistances are 60MPa, flexural strength 14MPa, remaining Linear change rate is 0~
0.8%.In contrast to heavy backpack cover, backpack cover substance decline 45%.Backpack cover service life is up to 900 times.
Claims (3)
1. a kind of preparation method of ladle backpack cover light mullite pouring material characterized by comprising first mix base portion
Uniformly, light-weight mullite ball is added, the ladle backpack cover light mullite pouring material that packaging is made described is uniformly mixed；
The aggregate and matrix include: according to parts by weight
Aggregate: 50~70 parts of light-weight mullite ball,
Matrix: 0~15 part of mullite particle, 5~15 parts of alumina powder, 5~15 parts of mullite miropowder, 0~8 part of silicon powder,
5~15 parts of bonding agent, 0.1~0.4 part of water-reducing agent；
The partial size of the mullite particle is 5~0mm；
Partial size D50≤5um of the mullite miropowder；
The light-weight mullite ball is to wait partial sizes spheric granules, and particle size range is 8~0.1mm, and the bulk density of ball is 1.8
~1.2g/cm3, apparent porosity is 25~70%, and water absorption rate is lower than 25%.
2. a kind of preparation method of ladle backpack cover light mullite pouring material according to claim 1, which is characterized in that institute
The bulk density for stating ladle backpack cover light mullite pouring material is 1.8~2.4g/cm3, apparent porosity is 30~50%, thermally conductive system
Number is 0.250~0.675W/ (mK) at 500 DEG C.
3. a kind of preparation method of ladle backpack cover light mullite pouring material according to claim 1, which is characterized in that institute
State ladle backpack cover light mullite pouring material through 110 DEG C processing for 24 hours compressive resistance be 20~50MPa, flexural strength be 3~
7MPa；1550 DEG C of processing 3h compressive resistances are 35~60MPa, and flexural strength is 8~14MPa, remaining Linear change rate is -0.5~
0.8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710174037.XA CN106904981B (en) | 2017-03-22 | 2017-03-22 | A kind of ladle backpack cover light mullite pouring material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710174037.XA CN106904981B (en) | 2017-03-22 | 2017-03-22 | A kind of ladle backpack cover light mullite pouring material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106904981A CN106904981A (en) | 2017-06-30 |
| CN106904981B true CN106904981B (en) | 2019-08-20 |
Family
ID=59195257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710174037.XA Active CN106904981B (en) | 2017-03-22 | 2017-03-22 | A kind of ladle backpack cover light mullite pouring material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106904981B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256090B (en) * | 2019-06-24 | 2022-04-29 | 武汉钢铁有限公司 | Lightweight thermal insulation castable for permanent layer of tundish |
| CN110256055A (en) * | 2019-07-11 | 2019-09-20 | 上海彭浦特种耐火材料厂有限公司 | High-strength heat preservation type refractory material and corresponding refractory product |
| CN110668830A (en) * | 2019-09-25 | 2020-01-10 | 上海利尔耐火材料有限公司 | Preparation method of novel mullite-combined light castable |
| CN110642633B (en) * | 2019-10-30 | 2022-05-13 | 浙江自立高温科技股份有限公司 | Carbon-free pouring nozzle of steel ladle and preparation method thereof |
| CN110723978A (en) * | 2019-10-30 | 2020-01-24 | 浙江自立高温科技股份有限公司 | Microporous mullite brick for permanent layer of steel ladle and preparation method thereof |
| CN111704474A (en) * | 2020-07-10 | 2020-09-25 | 中钢南京环境工程技术研究院有限公司 | Mullite refractory castable for ultrahigh-temperature smelting |
| CN112430107B (en) * | 2020-12-01 | 2023-03-31 | 上海宝九和耐火材料有限公司 | Low-iron low-conductivity light refractory castable for petrochemical industry and preparation method and application thereof |
| CN113307613B (en) * | 2021-03-24 | 2023-05-26 | 武汉钢铁有限公司 | Ladle cover castable and preparation method thereof |
| CN112778006B (en) * | 2021-03-24 | 2022-11-18 | 无锡尚臻新材料有限公司 | Light mullite sagger and preparation method and application thereof |
| CN114230350A (en) * | 2021-12-20 | 2022-03-25 | 世林（漯河）冶金设备有限公司 | Light high-strength mullite castable and construction method thereof |
| CN115872767A (en) * | 2022-11-29 | 2023-03-31 | 钢城集团凉山瑞海实业有限公司 | Microporous castable for ladle cover |
| CN115872759B (en) * | 2023-01-06 | 2023-08-08 | 大连科萌工程材料有限公司 | Pigging material for pumping casting or wet spraying construction and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242051A (en) * | 2013-05-30 | 2013-08-14 | 武汉科技大学 | Lightweight corundum-mullite castable and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172847B (en) * | 2007-09-30 | 2010-06-09 | 巩义市好运祥耐材有限公司 | Pouring material for producing high-temperature ceramic abrasion-proof lining body |
| CN101215176B (en) * | 2007-12-28 | 2011-12-21 | 中国钢研科技集团公司 | High-strength low heat conductivity energy-saving fireproof material |
| CN103979949B (en) * | 2014-06-06 | 2015-07-29 | 辽宁中镁控股股份有限公司 | A kind of steel ladle cover mould material and application thereof |
-
2017
- 2017-03-22 CN CN201710174037.XA patent/CN106904981B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242051A (en) * | 2013-05-30 | 2013-08-14 | 武汉科技大学 | Lightweight corundum-mullite castable and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106904981A (en) | 2017-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106904981B (en) | A kind of ladle backpack cover light mullite pouring material and preparation method thereof | |
| CN107032810B (en) | Gunning mix with excellent bonding performance for sintering large flue and preparation method | |
| WO2022144013A1 (en) | Corundum-based micro-nano-porous heat insulating refractory material and preparation method therefor | |
| CN110256090B (en) | Lightweight thermal insulation castable for permanent layer of tundish | |
| CN101618967B (en) | Dry coke quenching furnace circular passage tilt channel regional patching material | |
| CN106431371B (en) | A kind of high-strength closed pore mullite material and preparation method thereof | |
| CN108610063B (en) | High-performance mullite heat-insulating refractory castable | |
| CN100467426C (en) | Silicon carbide crusting resistant pouring material and preparation method thereof | |
| CN108046784A (en) | A kind of high alumina refractory casting material and preparation method thereof | |
| CN101805198B (en) | Mullite steel fiber castable | |
| CN101823892B (en) | Cement-free in-situ silicon nitride combined silicon carbide prefabricated member and preparation method thereof | |
| CN105565830B (en) | Composite RH refining furnace dip pipe encasing and its moulding process | |
| CN102964138A (en) | Light-weight Al2O3-SiC-C refractory casting material and preparation method thereof | |
| CN110563451B (en) | Ceramic ladle castable and preparation method thereof | |
| CN108530090B (en) | Light tundish working lining and preparation method thereof | |
| CN106830958B (en) | Low-aluminum low-heat-conduction alkali-resistant castable | |
| CN107141002A (en) | Composite fibre for desulfurization agitator strengthens castable refractory | |
| CN110668830A (en) | Preparation method of novel mullite-combined light castable | |
| CN102757252A (en) | 1080 m<3> blast furnace main iron runner castable | |
| CN115893953A (en) | Low-shrinkage ultrahigh-performance concrete and preparation method thereof | |
| CN108947547A (en) | A kind of high temperature resistant ladle safety liner castable | |
| CN113800894B (en) | Light high-strength refractory castable | |
| CN113307613B (en) | Ladle cover castable and preparation method thereof | |
| CN110040995A (en) | A kind of high temperature lightweight toughness mullite aggregate preparation method | |
| CN106431434A (en) | Closed-pore bauxite based mullite material and preparing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 312300 Zhejiang city of Shaoxing province Hangzhou Bay Juxian two East District of Shangyu economic and Technological Development Zone two Road No. 9 Patentee after: Zhejiang Zili High Temperature Technology Co., Ltd Address before: 312300 Zhejiang city of Shaoxing province Hangzhou Bay Juxian two East District of Shangyu economic and Technological Development Zone two Road No. 9 Patentee before: ZHEJIANG ZILI HIGH TEMPERATURE TECHNOLOGY CO., LTD. |