CN110317071A - A kind of ladle working lining low-porosity microporous preformed bricks and its production method - Google Patents
A kind of ladle working lining low-porosity microporous preformed bricks and its production method Download PDFInfo
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- CN110317071A CN110317071A CN201910756142.3A CN201910756142A CN110317071A CN 110317071 A CN110317071 A CN 110317071A CN 201910756142 A CN201910756142 A CN 201910756142A CN 110317071 A CN110317071 A CN 110317071A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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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
- 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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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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
- 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
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/449—Organic acids, e.g. EDTA, citrate, acetate, oxalate
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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
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5212—Organic
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
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- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention belongs to technical field of ferrous metallurgy, and in particular to a kind of ladle working lining low-porosity microporous preformed bricks and its production method, the present invention select additive polycarboxylic acid and Sulfonates compound and micro mist (α-Al by science2O3Micro mist, ρ-alumina powder and SiO2Micro mist) type and additional amount, the construction amount of water and mobility for making castable are in zone of reasonableness, to make preformed bricks obtain the lower porosity and a certain proportion of micropore, the product comes into effect in Rui Taima steel new material Science and Technology Ltd., it rolls in tetra- steel of Ma Gang and is used on 300 tons of ladles of head factory later, since it is with excellent scour resistance, slag corrosion resistance, anti-thermal shock and thermal insulation property, ladle skin temperature has dropped 15~25 DEG C in use process, packet condition is integrally good, without big crackle and peeling, service life is obviously prolonged.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, and in particular to a kind of ladle working lining is prefabricated with low-porosity microporous
Brick and its production method.
Background technique
With the development of metallurgical technology, the use condition of ladle is more and more harsher, and service life is severely impacted, but steel
Factory requires ladle long service life from the angle increased economic efficiency with production efficiency, and to solve this contradiction, this requires steel
Packet working lining should have the ability washed away with corroded for preferably resisting high-temperature molten steel and slag.Currently, domestic large ladle furnace makes
Carbon-free working lining is mainly preformed bricks, and the general porosity is higher, and 17% or so, corrosion resistance is slightly poor, further to be mentioned
Its high service performance reduces its porosity in the case where not increasing production cost substantially as far as possible, improves compactness extent, is
Improve a kind of effective ways of preformed bricks service life.
But from ladle heat insulation and from the aspect of improving thermal shock performance, ladle wall working lining has light-weighted research to become again
Gesture, Yao Pingheng low-porosity and lightweight relationship between the two, only make working lining stomata microporous and are uniformly distributed, and to the greatest extent
It closing relatively large stomata possible more, reducing open pore, can just make working lining in the lower situation of the porosity in this way, body
Close lower (lightweight), to make working lining that there is the ability washed away with corroded for preferably resisting high-temperature molten steel and slag, together
When there is the advantage of certain heat insulation effect again.And the type and additional amount of micro mist and additive are to the stomata of unshape refractory
Shape and distribution are affected, particularly with directly affecting its service performance for ladle preformed bricks.Although there is producer prefabricated
Ultrasonication is carried out to pug before brick casting or controls pore opening and distribution by centrifugal casting, but is taken without explanation
The size of the preformed bricks porosity after these measures.And take into account low-porosity and light-weighted low-porosity microporous ladle preformed bricks
And its production method has not yet to see reported in literature.
Summary of the invention
In order to overcome shortcomings and deficiencies of the existing technology, it is micro- that the present invention discloses a kind of ladle working lining low-porosity
Hole preformed bricks and its production method, with the ladle working lining of this prefabricated brick masonry have excellent scour resistance, slag corrosion resistance,
Anti-thermal shock and thermal insulation property, to improving cylinder-packing service life and reducing ladle radiation loss significant effect, economic benefit is obvious.
Specifically, the invention discloses a kind of ladle working lining low-porosity microporous preformed bricks, which is characterized in that packet
Include following component and mass percent:
Corundum in granules 65~80%, corundum fine powder 2~15%, fused magnesite particle 1~6%, fused magnesite fine powder 1~
6%, Spinel micropowder 5~15%, α-Al2O3Micro mist 3~13%, ρ-alumina powder 2~7%, silicon ash 0.2~3%, poly- carboxylic
The efficient diminishing dispersing agent 0.08~0.4% of acids, Sulfonates additive 0.01~0.5% and organic explosion-proof fiber 0.05~
0.15%, amount of water is the 3.8~5.0% of the raw material when being poured vibration moulding.
Preferably, the corundum in granules includes 15~5mm, 5~3mm, 3~1mm, 1~0mm particle size component, and each component contains
Amount is 10%~30%, is respectively preferably 15%~20%；15%~25%；20%~30%；5%~15%.
Preferably, the fused magnesite grain diameter is 1~0mm.
Preferably, the efficient diminishing dispersing agent of the polycarboxylic acid is the efficient diminishing dispersing agent of Monoladd 380s；The sulphur
Barbiturates additive is calcium lignosulfonate.
The invention further relates to a kind of systems of ladle working lining low-porosity microporous preformed bricks described in any of the above embodiments
Preparation Method, it is characterised in that: with corundum in granules, corundum fine powder, fused magnesite particle, fused magnesite fine powder, Spinel micropowder, α-
Al2O3Micro mist, ρ-alumina powder, SiO2Micro mist, it is the efficient diminishing dispersing agent of additional polycarboxylic acid, Sulfonates additive, organic
Explosion-proof fiber is raw material, handles to obtain through mixed grind, vibration moulding and maintenance, demoulding and maintenance, spraying or brushing, baking.
Preferably, the mixed grind be in kolleroang carry out fine powder premix, charging sequence: first plus schmigel and spinelle it is micro-
Powder, the efficient diminishing dispersing agent of polycarboxylic acid, Sulfonates additive and SiO2Micro mist adds centre, ρ-alumina powder, α-Al2O3
Micro mist and magnesia powder add face, and mixed grind uniform discharge is spare；Then particle, organic explosion-proof fiber and thin are carried out in kolleroang
The mixed grind of powder, charging sequence: first plus particulate material mixed grind is uniform, and it is uniform to add organic explosion-proof fiber mixed grind, is eventually adding premix
Good fine powder material mixed grind is uniform.
Preferably, the vibration moulding and curing step are outer plus the raw material 3.8~5.0% after each component mixed grind
Water stirs evenly；The pug being stirred addition mold internal vibration is uniformly made into its molding, then at 25~45 DEG C of environment temperature,
Curing in the mold 16~24 hours under the conditions of relative humidity >=60%.
Preferably, the demoulding and maintenance are by natural (environment temperature after the preformed bricks demoulding through vibration moulding and after conserving
10~40 DEG C of degree) maintenance 2~3 days.
Preferably, it is described spraying or brushing for will through the preformed bricks after demoulding and maintenance close to permanent layer side spraying or
Brush the reflective coating of one layer of 1mm or so thickness, scene is directly permanent layer surface sprays or brushes, then without this step.
Preferably, it is described baking for demoulded and conserved or spraying/brushing preformed bricks in room temperature to 300 DEG C through gradually
Heating, constant temperature baking, then heat up, again constant temperature baking etc. modes toast 45~60 hours.
Compared with prior art, the present invention advantage is:
(1) ladle working lining low-porosity microporous preformed bricks, by following chemical components (%) group by weight percentage
At: 85~97%Al2O3, 1.5~12%MgO, 0.5~3%SiO2, remaining is micro or impurity element.Wherein α-Al2O3It is micro-
Powder, ρ-alumina powder and SiO2Micro mist additional amount 5.2~23%, polycarboxylic acid and Sulfonates additive 0.09~0.9%；
The present invention selects additive polycarboxylic acid and Sulfonates compound and micro mist (α-Al by science2O3Micro mist, ρ-aluminium oxide are micro-
Powder and SiO2Micro mist) type and additional amount, the construction amount of water for making castable and mobility are in zone of reasonableness, to make prefabricated
Brick obtains the lower porosity and a certain proportion of micropore；
(2) by the reflective coating in one layer of 1mm of the spraying of permanent ladle layer surface or brushing or so thickness, or in advance prefabricated
Brick is sprayed by permanent level or one layer of 1mm of brushing or so thick reflective coating, to improve ladle heat insulation effect；
(3) ladle working lining produced by the present invention with low-porosity microporous preformed bricks 110 DEG C × for 24 hours under the conditions of pressure resistance
Intensity >=45.0MPa, apparent porosity≤13.0%；Compressive resistance >=60.0MPa under the conditions of 1550 DEG C × 3h heats permanent line
Variation 0~+1.5%.
(4) limited in Rui Taima steel new material science and technology in March, 2016 using ladle wall preformed bricks produced by the invention
Company comes into effect, and rolls in tetra- steel of Ma Gang used on 300 tons of ladles of head factory later.Since it is with excellent anti-impact
Brush, slag corrosion resistance, anti-thermal shock and thermal insulation property, ladle skin temperature has dropped 15~25 DEG C in use process, and packet condition is whole
Well, without big crackle and peeling, service life has reached 155 furnaces, and has the potentiality using 180 furnaces, cylinder-packing residual thickness when disintegration
It is thicker, and between preformed bricks and preformed bricks and permanent interlayer are without cold steel, it is safe to use, to improving ladle lining service life and guarantor
Temp effect is significant, and economic benefit is obvious, provides value-added service to a certain extent for user.
Specific embodiment
The present invention will be further described with reference to the examples below.Described embodiment and its result are merely to illustrate
The present invention, without the present invention described in detail in claims should will not be limited.
The specific production procedure of the present invention are as follows:
Raw material crushing processing → weighing → mixed grind → vibration moulding and maintenance → demoulding and maintenance → spraying or → brushing
Reflective coating → baking → inspection, packaging factory.
Raw material is in market purchasing, it is desirable that as follows:
Primary raw material corundum and fused magnesite require sintering good, and concrete embodiment is exactly that body is close, water absorption rate will reach technology
Index etc.；
Fused magnesite is processed into 1~0mm particulate material by broken and screening plant and 180 mesh fine powder materials are sent into feed bin；
Corundum in granules and fine powder, spinelle and α-Al2O3Micro mist, ρ-aluminium oxide and SiO2Micro mist (silicon ash) and additive
The efficient diminishing dispersing agent of Monoladd 380s, calcium lignosulfonate, organic explosion-proof fiber and reflective coating are according to requiring in market
Buying.
Embodiment 1
A kind of preparation method of ladle working lining low-porosity microporous preformed bricks.
(1) raw material crushing is processed: raw material is bought according to aforementioned claim, and primary raw material corundum and fused magnesite require sintering
Well, embody is exactly that body is close, water absorption rate will reach technical indicator etc.；Fused magnesite is processed by broken and screening plant
1~0mm particulate material and 180 mesh fine powder materials are sent into feed bin；
(2) it weighs: pressing corundum in granules: 15~5mm 20%, 5~3mm15%, 3~1mm 20%, 1~0mm10%, just
Beautiful fine powder 15%, 1~0mm of fused magnesite particle 6%, fused magnesite fine powder 1%, Spinel micropowder 5%, α-Al2O3Micro mist
3%, ρ-alumina powder 2%, SiO2Micro mist 3%；It is the efficient diminishing dispersing agent 0.08% of additive Monoladd 380s, wooden
(additive mass percent is accounted for aforementioned with additive for plain sulfoacid calcium 0.01%, organic explosion-proof fiber 0.05% and the weighing of water 4.4%
In addition the ratio of component total amount calculates)；
(3) mixed grind: fine powder premix is first carried out in kolleroang, charging sequence: first plus schmigel and Spinel micropowder,
The efficient diminishing dispersing agent of Monoladd 380s, calcium lignosulfonate and silicon ash (SiO2> 95%) plus it is intermediate, ρ-aluminium oxide is micro-
Powder, α-Al2O3Micro mist and magnesia powder add face, and mixed grind 15min discharging is spare；Then particle, You Jifang are carried out in kolleroang
Charging sequence: the mixed grind of quick-fried fiber and fine powder first plus particulate material mixed grind 30s, adds organic explosion-proof fiber mixed grind 30s, finally
Pre- mixed fine powder material mixed grind 1min is added；
(4) vibration moulding and maintenance: the water of the additional raw material 4.4% on the basis of step (3) stirs 3 minutes；It will
The pug that is stirred, which is added mold internal vibration 2~3 minutes, makes its molding, then at 25~45 DEG C of environment temperature, relative humidity >=
Curing in the mold 16~24 hours under the conditions of 60%；
(5) demould and conserve: natural (10~40 DEG C of environment temperature) maintenance 48 is small after the preformed bricks of curing in the mold are demoulded
When；
(6) it sprays or brushes: in the preformed bricks Jing Guo natural curing close to one layer of 1mm of the spraying of the side of permanent layer or brushing
The thick reflective coating in left and right, scene is directly permanent layer surface sprays or brushes, then without this step；
(7) it toasts: will be carried out by the preformed bricks of natural curing or spraying (brushing) reflective coating by following baking regime
Baking is toasted to get low-porosity microporous preformed bricks by following baking condition:
(8) it examines factory: requiring block-by-block to carry out visual examination when packaging, taken out by physical and chemical index of the batch to preformed bricks
Inspection.
According to the physical and chemical experience index of national standard method detection 1 gained low-porosity microporous preformed bricks of embodiment, such as following table
It is shown:
Embodiment 2
In addition to ingredient, content are different from embodiment 1, other techniques are same as Example 1, a kind of low gas of ladle working lining
The preparation method of porosity microporous preformed bricks:
Weigh: press corundum in granules: 15~5mm 15%, 5~3mm20%, 3~1mm 30%, 1~0mm15%, corundum are thin
Powder 2%, 1~0mm of fused magnesite particle 1%, fused magnesite fine powder 6%, Spinel micropowder 5%, α-Al2O3Micro mist 3%, ρ-oxygen
Change aluminium micro mist 2%, SiO2Micro mist 1%；The efficient diminishing dispersing agent 0.24% of additive Monoladd 380s, calcium lignosulfonate
0.25%, organic explosion-proof fiber 0.1% and water 3.8% weigh, and obtain new ladle working lining according to 1 same procedure of embodiment and use
Low-porosity microporous preformed bricks, physical and chemical experience index are as follows:
Embodiment 3
In addition to ingredient, content are different from embodiment 1, other techniques are same as Example 1, a kind of low gas of ladle working lining
The preparation method of porosity microporous preformed bricks:
Weigh: press corundum in granules: 15~5mm 10%, 5~3mm10%, 3~1mm 25%, 1~0mm20%, corundum are thin
Powder 7.5%, 1~0mm of fused magnesite particle 3.5%, fused magnesite fine powder 3.5%, Spinel micropowder 15%, α-Al2O3Micro mist
3%, ρ-alumina powder 2.3%, SiO2Micro mist 0.2%；The efficient diminishing dispersing agent 0.08% of additional Monoladd 380s, wood
Quality sulfoacid calcium 0.01%, organic explosion-proof fiber 0.05% and water 4.4% weigh, and obtain according to 1 same procedure of embodiment new
Ladle working lining low-porosity microporous preformed bricks, physical and chemical experience index are as follows:
Embodiment 4
In addition to ingredient, content are different from embodiment 1, other techniques are same as Example 1, a kind of low gas of ladle working lining
The preparation method of porosity microporous preformed bricks:
Weigh: press corundum in granules: 15~5mm 20%, 5~3mm15%, 3~1mm 20%, 1~0mm10%, corundum are thin
Powder 2%, 1~0mm of fused magnesite particle 3.5%, fused magnesite fine powder 3.5%, Spinel micropowder 5%, α-Al2O3Micro mist
13%, ρ-alumina powder 7%, SiO2Micro mist 1%；The efficient diminishing dispersing agent 0.4% of additional Monoladd 380s, lignin
Sulfoacid calcium 0.5%, organic explosion-proof fiber 0.15% and water 5.0% weigh, and obtain new ladle work according to 1 same procedure of embodiment
Make lining low-porosity microporous preformed bricks, physical and chemical experience index is as follows:
Embodiment 5
In addition to ingredient, content are different from embodiment 1, other techniques are same as Example 1, a kind of low gas of ladle working lining
The preparation method of porosity microporous preformed bricks:
Weigh: press corundum in granules: 15~5mm 20%, 5~3mm15%, 3~1mm 20%, 1~0mm10%, corundum are thin
Powder 4%, 1~0mm of fused magnesite particle 3.5%, fused magnesite fine powder 3.5%, Spinel micropowder 10%, α-Al2O3Micro mist
8%, ρ-alumina powder 4.5%, SiO2Micro mist 1.5%；The efficient diminishing dispersing agent 0.15% of additional Monoladd 380s, wood
Quality sulfoacid calcium 0.1%, organic explosion-proof fiber 0.1% and water 4.2% weigh, and obtain new steel according to 1 same procedure of embodiment
Packet working lining low-porosity microporous preformed bricks, physical and chemical experience index are as follows:
Comparative example 1
In addition to ingredient, content are different from embodiment 1, other techniques are same as Example 1, a kind of low gas of ladle working lining
The preparation method of porosity microporous preformed bricks:
Weigh: press corundum in granules: 15~5mm 20%, 5~3mm15%, 3~1mm 20%, 1~0mm10%, corundum are thin
Powder 4%, 1~0mm of fused magnesite particle 3.5%, fused magnesite fine powder 3.5%, Spinel micropowder 10%, 3 μ corundum powder of <
8%, ρ-alumina powder 4.5%, SiO2Micro mist 1.5%；The efficient diminishing dispersing agent 0.15% of additional Monoladd 380s, wood
Quality sulfoacid calcium 0.1%, organic explosion-proof fiber 0.1% and water 4.8% weigh, and obtain new steel according to 1 same procedure of embodiment
Packet working lining low-porosity microporous preformed bricks, physical and chemical experience index are as follows:
Comparative example 2
In addition to ingredient, content are different from embodiment 1, other techniques are same as Example 1, a kind of low gas of ladle working lining
The preparation method of porosity microporous preformed bricks:
Weigh: press corundum in granules: 15~5mm 20%, 5~3mm15%, 3~1mm 20%, 1~0mm10%, corundum are thin
Powder 2%, 1~0mm of fused magnesite particle 3.5%, fused magnesite fine powder 3.5%, Spinel micropowder 5%, α-Al2O3Micro mist
15%, ρ-alumina powder 4.5%, SiO2Micro mist 1.5%；The efficient diminishing dispersing agent 0.15% of additional Monoladd 380s, wood
Quality sulfoacid calcium 0.1%, organic explosion-proof fiber 0.1% and water 5.0% weigh, and obtain new steel according to 1 same procedure of embodiment
Packet working lining low-porosity microporous preformed bricks, physical and chemical experience index are as follows:
Claims (10)
1. a kind of ladle working lining low-porosity microporous preformed bricks, which is characterized in that including following component and quality percentage
Than:
Corundum in granules 65~80%, corundum fine powder 2~15%, fused magnesite particle 1~6%, fused magnesite fine powder 1~6%, point
Spar micro mist 5~15%, α-Al2O3Micro mist 3~13%, ρ-alumina powder 2~7%, silicon ash 0.2~3%, polycarboxylic acid are high
Diminishing dispersing agent 0.08~0.4%, Sulfonates additive 0.01~0.5% and organic explosion-proof fiber 0.05~0.15% are imitated,
Amount of water is the 3.8~5.0% of the raw material when being poured vibration moulding.
2. ladle working lining according to claim 1 low-porosity microporous preformed bricks, which is characterized in that the corundum
Particle includes 15~5mm, 5~3mm, 3~1mm, 1~0mm particle size component, and each component content is 10%~30%, preferred respectively
It is 15%~20%；15%~25%；20%~30%；5%~15%.
3. ladle working lining according to claim 1 low-porosity microporous preformed bricks, which is characterized in that the electric smelting
Magnesia particle partial size is 1~0mm.
4. ladle working lining according to claim 1 low-porosity microporous preformed bricks, which is characterized in that the poly- carboxylic
The efficient diminishing dispersing agent of acids is the efficient diminishing dispersing agent of Monoladd 380s；The Sulfonates additive is sulfomethylated lignin
Sour calcium.
5. a kind of described in any item preparation methods of ladle working lining low-porosity microporous preformed bricks of Claims 1 to 4,
It is characterized by: with corundum in granules, corundum fine powder, fused magnesite particle, fused magnesite fine powder, Spinel micropowder, α-Al2O3It is micro-
Powder, ρ-alumina powder, SiO2Micro mist, the efficient diminishing dispersing agent of additional polycarboxylic acid, Sulfonates additive, organic explosion-proof fibre
Dimension is raw material, handles to obtain through mixed grind, vibration moulding and maintenance, demoulding and maintenance, spraying or brushing, baking.
6. preparation method according to claim 5, it is characterised in that: the mixed grind is that progress fine powder is pre- in kolleroang
It is mixed, charging sequence: first plus schmigel and Spinel micropowder, the efficient diminishing dispersing agent of polycarboxylic acid, Sulfonates additive and
SiO2Micro mist adds centre, ρ-alumina powder, α-Al2O3Micro mist and magnesia powder add face, and mixed grind uniform discharge is spare；Then
The mixed grind of particle, organic explosion-proof fiber and fine powder is carried out in kolleroang, charging sequence: first plus particulate material mixed grind is uniform, then plus
Enter that organic explosion-proof fiber mixed grind is uniform, it is uniform to be eventually adding pre- mixed fine powder material mixed grind.
7. preparation method according to claim 5, it is characterised in that: the vibration moulding and curing step is in each components
The water of the additional raw material 3.8~5.0%, stirs evenly after mixed grind；The pug being stirred addition mold internal vibration is uniformly made
It is formed, then at 25~45 DEG C of environment temperature, curing in the mold 16~24 hours under the conditions of relative humidity >=60%.
8. preparation method according to claim 5, it is characterised in that: it is described demoulding and maintenance for will through vibration moulding and support
Natural curing 2~3 days after preformed bricks demoulding after shield.
9. preparation method according to claim 5, it is characterised in that: the spraying or brushing is will be after demouldings and maintenance
Preformed bricks close to the spraying of the side of permanent layer or brush the thick reflective coating of one layer of 1mm or so, scene is directly in permanent layer table
What face sprayed or brushed, then without this step.
10. preparation method according to claim 5, it is characterised in that: it is described baking for demoulded and conserved or sprayed/
The preformed bricks of brushing are gradually warmed up in room temperature to 300 DEG C, constant temperature baking, then heat up, again the modes such as constant temperature baking toast 45~
60 hours.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159214A (en) * | 2020-09-07 | 2021-01-01 | 浙江自立高温科技股份有限公司 | Castable for refining ladle working layer |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112159214B (en) * | 2020-09-07 | 2022-08-23 | 湛江自立高温材料有限公司 | Castable for refining ladle working layer |
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