CN110272292A - A kind of magnesia coating of tundish and preparation method thereof - Google Patents
A kind of magnesia coating of tundish and preparation method thereof Download PDFInfo
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- CN110272292A CN110272292A CN201910738897.0A CN201910738897A CN110272292A CN 110272292 A CN110272292 A CN 110272292A CN 201910738897 A CN201910738897 A CN 201910738897A CN 110272292 A CN110272292 A CN 110272292A
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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
- C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/74—Ceramic products containing macroscopic reinforcing agents containing shaped metallic materials
- C04B35/76—Fibres, filaments, whiskers, platelets, or the like
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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
- C04B2235/34—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
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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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
- C04B2235/34—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
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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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
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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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
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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
- C04B2235/70—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
Abstract
The invention belongs to technical field of refractory materials, more particularly to a kind of using secondary magnesium carbon material after burning as magnesia coating of the tundish of primary raw material and preparation method thereof, it is characterized in that, magnesium carbon is given up into brick through drying, except iron, after broken, high temperature full combustion, manual cleaning remains in the molten tumor on reworked material surface after kiln discharge, residue, it breaks into pieces and is burnt into insufficient part in the middle part of rear artificial sort out, reach 90% firing rate, then it is crushed again and obtains partial size difference, secondary magnesium carbon material after the burning of content of MgO > 85wt%, the magnesia coating performance of tundish that secondary magnesium carbon material is prepared as raw material after being burnt using this is stablized, intensity is high, demoulding is good, workability is excellent and at low cost, also achieve recycling for waste and old resistance to material.
Description
Technical field
The invention belongs to technical field of refractory materials, are related to tundish with magnesia coating.More particularly to one kind to burn after
Secondary magnesium carbon material is the magnesia coating of tundish and preparation method thereof of primary raw material.
Background technique
The service life of bakie working lining is one of the principal element for determining casting sequence in continuous casting, and service performance is good
Coating tundish material it is most important to stablizing for continuous casting safety and steel product quality.Tundish has the longevity with magnesia coating
The excellent performances such as length, purifying of steel, resistance to slag are ordered, primary raw material is magnesite clinker, fused magnesite etc..In recent years, with state
The increasing of the environmentally friendly supervise and examine dynamics of family, and the highly energy-consumings such as magnesia, the integration of high pollution mine, ore limit are adopted, lead to magnesia
Price is constantly soaring, seeks to have become the task of top priority using substitution magnesia raw material.If can be in the premise for meeting steel mill's requirement
Under, the trials such as waste and old magnesia, magnesium carbonaceous, magnalium carbonaceous are replaced into part magnesia particle, this not only contributes to save fire resisting former
Material substantially reduces refractory material production cost, and has very positive meaning to protection environment etc..
Currently, not carrying out finishing due to only passing through simple sorting, removal of impurities, break process with rear magnesia carbon brick
Work is generally directly no more than 30% using broken secondary magnesium carbon material substitution magnesia particle ratio, and otherwise manufactured product is strong
Degree can be substantially reduced, while directly substitution can be such that the quality stability of product made of regenerative raw materials does not also can guarantee.The present invention
By using waste magnesia carbon brick particle, magnesia particle after burning as aggregate, at the same fused magnesite fine powder of arranging in pairs or groups, plasticizer, bonding agent, point
Powder etc. determines a kind of using secondary magnesium carbon material after burning as the preparation process of the magnesia coating of the tundish of primary raw material.By this
The firing magnesium carbon material quality of magnesium carbon material process is stablized after burning, and uses the firing magnesium carbon material for the centre of main material production
It is normal to wrap magnesia coating service performance.
Summary of the invention
Present invention aims at the firing magnesium carbon material of the magnesium carbon material process after this burning, using secondary magnesium carbon material after burning
Significantly substitute magnesia particle raw material, while adding bonding agent, plasticizer, dispersing agent and anti-knock agent etc., develop a kind of performance
Stablize, the magnesia coating of tundish that intensity is high, demoulding is good, workability is excellent and at low cost, realizes waste and old resistance to material
It recycles.
Specifically, the present invention provides it is a kind of using burn after secondary magnesium carbon material as the magnesia coating of the tundish of primary raw material,
It is characterised by comprising: burn after 30~60wt% of secondary magnesium carbon material, 5%~50wt% of magnesia particle, fused magnesite fine powder 10~
40wt%, 1~3wt% of bonding agent, 1.7~5wt% of plasticizer, the dispersing agent of 0.2~1.5wt%, 0.1~0.5wt% it is anti-
Detonator.
Preferably, secondary magnesium carbon material obtains by the following method after the burning: by magnesium carbon give up brick through drying, except iron, broken
Obtain the useless magnesium carbon material of 0~30mm of partial size；It is then deposited among kiln car, the kiln for being 1100~1300 DEG C in firing temperature
Middle full combustion, manual cleaning remains in the molten tumor on reworked material surface, residue after kiln discharge, firing in the middle part of artificial sort out after breaking into pieces
Insufficient part, the particle that the complete useless magnesium carbon of firing turns to be broken into 3~0mm of partial size is stand-by, and broken particle should reach
90% or more firing rate can use, wherein content of MgO > 85wt% in secondary magnesium carbon material after burning.
Preferably, the magnesia particle is fused magnesite or magnesite clinker particle, and the granularity of magnesia particle is 3~1mm and 1
~0mm, content of MgO >=92wt%, the magnesia particle of 3~1mm of partial size are 0~20wt%, preferably 4~12%；1~0mm of partial size
Magnesia particle be 5~30wt%, preferably 12%~18%.
Preferably, content of MgO >=96wt% of the fused magnesite fine powder, partial size≤0.075mm, the fused magnesite are thin
Powder mass percent is 25%~35%.
Preferably, the bonding agent is silicon powder, and the silicon powder is SiO2Content >=94wt%, partial size≤
0.088mm, the bonding agent mass percent are 2%~3%.
Preferably, the plasticizer is well as clay fines, and the well as clay fines uses bentonite, Guangxi white clay or modification
The mixture of one or more of clay, partial size≤0.075mm, the plasticizer mass percent be 2%~
3%.
Preferably, the dispersing agent be sodium tripolyphosphate, calgon or polycarboxylate water-reducer it is one or two kinds of with
On mixture, the dispersing agent mass percent be 0.3~0.6wt%.
Preferably, the anti-knock agent is explosion-proof fiber, and the length of the explosion-proof fiber is 3~5mm, and mass percent is
0.1~0.3wt%.
A kind of preparation method of the magnesia coating of tundish, method and step are as follows:
(1) all raw materials are weighed by weight ratio；
(2) secondary magnesium carbon material particle and magnesia particle after burning are mixed, and stirred evenly, then be added bonding agent and
Dispersing agent simultaneously stirs evenly mixture is made；
(3) fused magnesite fine powder, plasticizer and anti-knock agent are added in the mixture of step (2) preparation, and stirred equal
It is even, the magnesia coating finished product of tundish is made.
The magnesia coating of tundish prepared by the present invention is stable with performance, intensity is high, demoulding is good, workability is excellent
Good and at low cost feature.
Compared with prior art, the magnesia coating of tundish of the present invention has the advantage that
(1) the magnesia coating of this tundish is at low cost as primary raw material using secondary magnesium carbon material after burning, while secondary magnesium carbon material
Due to being calcined after being broken into certain particle size, firing quality being improved, magnesia particle can be efficiently separated, false particle is few, thus into
The stabilization of one step guarantee reclaiming material service performance.
(2) by firing carbonization treatment, pressure resistance after the use ratio and burning of useless magnesia carbon refractory is greatly improved
Intensity, secondary magnesium carbon particle can reach 60% substitution dosage after burning.
(3) it uses using secondary magnesium carbon material after burning as the magnesia coating of the tundish of main material production, after stirring and smearing
See that color is normal, no significant change uses normal, 10 furnace of highest, minimum 5 furnace, average 6.5 furnaces.
(4) the invention simple production process, easy to control, product qualification rate is high, long shelf-life, and manufacturing cost is low.
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.
In order to avoid repeating, first that experimentation parameter Unify legislation involved in specific embodiment is as follows, embodiment
In repeat no more:
Secondary magnesium carbon material obtains by the following method after burning: by the magnesium carbon of 300kg or so give up brick through drying, except iron, broken
The useless magnesium carbon material of 0~30mm of granularity is obtained, is then deposited among kiln car, the kiln for being 1100~1300 DEG C in firing temperature
Middle full combustion, manual cleaning remains in the molten tumor on reworked material surface, residue after kiln discharge, firing in the middle part of artificial sort out after breaking into pieces
Insufficient part, the particle that the complete useless magnesium carbon of firing turns to be broken into 3~0mm of granularity is stand-by, and broken particle should reach
90% or more firing rate can use.
Based on the above technical solution, the present invention can also have following further specific choice or optimum choice.
Specifically, described is broken for being crushed using jaw crusher.
Specifically, content of MgO > 85wt% in secondary magnesium carbon material after the burning
In addition, the present invention also provides the preparation methods for preparing the magnesia coating of above-mentioned tundish.
Specifically, first by the magnesia of secondary magnesium carbon material particle, partial size 3~1mm and 1~0mm after the burning of 3~0mm of partial size
Grain is mixed, and is stirred evenly, and bonding agent then is added and dispersing agent stirs evenly and mixture is made, finally by partial size≤
Fused magnesite fine powder, plasticizer fine powder and the explosion-proof fiber of 0.075mm is added in mixture, and stir evenly, and is made
Between wrap magnesia coating finished product.
Embodiment 1
A kind of preparation method of the magnesia coating of tundish, its step are as follows:
(1) all raw materials are weighed according to the ratio: secondary magnesium carbon particle 54wt%, 3~1mm of partial size after the burning of 3~0mm of partial size
Fused magnesite particle 4wt%；The fused magnesite particle 12wt% of 1~0mm of partial size；Partial size≤0.075mm fused magnesite is thin
Powder 25wt%；Partial size≤0.088mm silicon powder 2.3wt%；The Guangxi partial size≤0.075mm white clay 5wt%；Sodium tripolyphosphate
0.3wt%；Calgon 0.3wt%；Explosion-proof fiber 0.1wt%.
(2) be secondary magnesium carbon material particle after 3~0mm is burnt by partial size, partial size is 3~1mm and the magnesia particle of 1~0mm falls
Mixing 5 minutes is carried out in into blender, is stirred evenly, and silicon powder is then added and sodium tripolyphosphate, calgon stirring mix
It closes 1 minute, mixture is made.
(3) partial size≤0.075mm fused magnesite fine powder, Guangxi white clay and explosion-proof fiber are added to step (2) system
At mixture in, blender stir 10 minutes, the magnesia coating finished product of tundish is made.
By actually detected, obtain the magnesia coating performance data of 1 tundish of embodiment and be as follows:
Embodiment 2
A kind of preparation method of the magnesia coating of tundish, its step are as follows:
(1) all raw materials are weighed according to the ratio: secondary magnesium carbon particle 47wt%, 3~1mm of partial size after the burning of 3~0mm of partial size
Magnesite clinker particle 7wt%；The magnesite clinker particle 13wt% of 1~0mm of partial size；Partial size≤0.075mm fused magnesite is thin
Powder 27wt%；Partial size≤0.088mm silicon powder 2.4wt%；Partial size≤0.075mm bentonite fine powder 1.5wt%, Guangxi White
Mud fine powder 1.5wt%；Polycarboxylate water-reducer 0.4wt%；Explosion-proof fiber 0.2wt%.
(2) be secondary magnesium carbon material particle after 3~0mm is burnt by partial size, partial size is 3~1mm and the magnesite clinker of 1~0mm
Grain, which is poured into, carries out mixing 5 minutes in blender, stir evenly, silicon powder then is added and polycarboxylate water-reducer is stirred 1 point
Mixture is made in clock.
(3) partial size≤0.075mm fused magnesite fine powder, bentonite fine powder, Guangxi white clay fine powder and explosion-proof fiber are added
Enter into mixture made of step (2), blender stirs 10 minutes, and the magnesia coating finished product of tundish is made.
By actually detected, obtain the magnesia coating performance data of 2 tundish of embodiment and be as follows:
Embodiment 3
A kind of preparation method of the magnesia coating of tundish, its step are as follows:
(1) all raw materials are weighed according to the ratio: secondary magnesium carbon particle 30wt%, 3~1mm of partial size after the burning of 3~0mm of partial size
Fused magnesite particle 12wt%；The fused magnesite particle 18wt% of 1~0mm of partial size；Partial size≤0.075mm fused magnesite is thin
Powder 34wt%；Partial size≤0.088mm silicon powder 3wt%；Partial size≤0.075mm modification well as clay fines 2.4wt%；Six inclined phosphorus
Sour sodium 0.3wt%；Explosion-proof fiber 0.3wt%.
(2) be secondary magnesium carbon material particle after 3~0mm is burnt by partial size, partial size is 3~1mm and the fused magnesite of 1~0mm
Grain, which is poured into, carries out mixing 5 minutes in blender, stir evenly, silicon powder then is added and calgon is stirred 1 minute,
Mixture is made.
(3) partial size≤0.075mm fused magnesite fine powder, modified well as clay fines and explosion-proof fiber are added to step (2)
In manufactured mixture, blender is stirred 10 minutes, and the magnesia coating finished product of tundish is made.Packed finished product is sent to steel
Factory when coating is constructed, is stirred with kolleroang mixing and water adding and is constructed.
By actually detected, obtain the magnesia coating performance data of 3 tundish of embodiment and be as follows:
It sees that color is normal after the magnesia coating of the tundish that above-described embodiment 1-3 is produced, stirring and smearing, becomes without obvious
Change, have good workability, at the scene using normal, 10 furnace of access times highest, minimum 5 furnace, average 6.5 furnaces.
Embodiment 4
Selection example 3 compares, and other conditions are constant, and magnesium carbon is only given up brick without this patent process.Magnesium carbon is useless
The secondary magnesium carbon material of 3~0mm of partial size, content of MgO > 85wt% are made by the processes such as sorting, crushing, screening for brick.
A kind of preparation method of the magnesia coating of tundish, its step are as follows:
(1) all raw materials are weighed according to the ratio: the secondary magnesium carbon particle 30wt% of 3~0mm of partial size, the electricity of 3~1mm of partial size
Fused magnesia particle 12wt%；The fused magnesite particle 18wt% of 1~0mm of partial size；Partial size≤0.075mm fused magnesite fine powder
34wt%；Partial size≤0.088mm silicon powder 3wt%；Partial size≤0.075mm modification well as clay fines 2.4wt%；Hexa metaphosphoric acid
Sodium 0.3wt%；Explosion-proof fiber 0.3wt%.
(2) be 3~0mm secondary magnesium carbon material particle by partial size, partial size is 3~1mm and the fused magnesite particle of 1~0mm falls
Mixing 5 minutes is carried out in into blender, is stirred evenly, and silicon powder then is added and calgon is stirred 1 minute, is made
Mixture.
(3) partial size≤0.075mm fused magnesite fine powder, modified well as clay fines and explosion-proof fiber are added to step (2)
In manufactured mixture, blender is stirred 10 minutes, and the magnesia smearing material products 1 of tundish are made.
Embodiment 3 and the comparison of 1 index of the carbon of secondary magnesium containing 30wt% material products are as follows:
The data comparison from table: two products are in same process, and content of MgO is in the case where 87wt% or so, the present invention
Product addition 30wt% burn after the index of secondary magnesium carbon material and the product 1 of former addition 30wt% secondary magnesium carbon material (not being burnt into)
Index is compared, and compressive resistance is improved after cold crushing strength, burning.
Embodiment 5
A kind of preparation method of the magnesia coating of tundish, its step are as follows:
(1) all raw materials are weighed according to the ratio: secondary magnesium carbon particle 15wt%, 3~1mm of partial size after the burning of 3~0mm of partial size
Fused magnesite particle 17wt%；The fused magnesite particle 28wt% of 1~0mm of partial size；Partial size≤0.075mm fused magnesite is thin
Powder 34wt%；Partial size≤0.088mm silicon powder 3wt%；Partial size≤0.075mm modification well as clay fines 2.4wt%；Six inclined phosphorus
Sour sodium 0.3wt%；Explosion-proof fiber 0.3wt%.
(2) be secondary magnesium carbon material particle after 3~0mm is burnt by partial size, partial size is 3~1mm and the fused magnesite of 1~0mm
Grain, which is poured into, carries out mixing 5 minutes in blender, stir evenly, silicon powder then is added and calgon is stirred 1 minute,
Mixture is made.
(3) partial size≤0.075mm fused magnesite fine powder, modified well as clay fines and explosion-proof fiber are added to step (2)
In manufactured mixture, blender is stirred 10 minutes, and the magnesia smearing material products 2 of tundish are made.
Secondary magnesium carbon material products 2 and the comparison of 3 index of embodiment are as follows after burning containing 15wt%:
From data comparison in table: the index and addition 30wt% of secondary magnesium carbon material after product addition 15wt% of the invention is burnt
The index of the product of secondary magnesium carbon material is compared after burning, and compressive resistance is equally significantly improved after burning.
Claims (9)
1. a kind of using secondary magnesium carbon material after burning as the magnesia coating of the tundish of primary raw material characterized by comprising after burning again
Raw 30~60wt% of magnesium carbon material, 5%~50wt% of magnesia particle, 10~40wt% of fused magnesite fine powder, 1~3wt% of bonding agent,
1.7~5wt% of plasticizer, the dispersing agent of 0.2~1.5wt%, 0.1~0.5wt% anti-knock agent.
2. the magnesia coating of tundish according to claim 1, which is characterized in that after the burning secondary magnesium carbon material by with
Lower method obtains: by magnesium carbon give up brick through drying, except iron, broken obtain the useless magnesium carbon material of 0~30mm of partial size；Then it is deposited in
It is full combustion in 1100~1300 DEG C of kiln in firing temperature, manual cleaning remains in reworked material table after kiln discharge among kiln car
The molten tumor in face, residue are broken into pieces and are burnt into insufficient part in the middle part of rear artificial sort out, are burnt into completely useless magnesium carbon and turn broken granulating
The particle of 3~0mm of diameter is stand-by, and the firing rate that broken particle should reach 90% or more can use, wherein secondary magnesium after burning
Content of MgO > 85wt% in carbon material.
3. the magnesia coating of tundish according to claim 1, which is characterized in that the magnesia particle be fused magnesite or
Magnesite clinker particle, the granularity of magnesia particle are 3~1mm and 1~0mm, content of MgO >=92wt%, the magnesia of 3~1mm of partial size
Particle be 0~20wt%, preferably 4~12%；The magnesia particle of 1~0mm of partial size be 5~30wt%, preferably 12%~18%.
4. the magnesia coating of tundish according to claim 1, which is characterized in that the MgO of the fused magnesite fine powder contains
Amount >=96wt%, partial size≤0.075mm, the fused magnesite fine powder mass percent are 25%~35%.
5. the magnesia coating of tundish according to claim 1, which is characterized in that the bonding agent is silicon powder, institute
The silicon powder stated is SiO2Content >=94wt%, partial size≤0.088mm, the bonding agent mass percent are 2%~3%.
6. the magnesia coating of tundish according to claim 1, which is characterized in that the plasticizer is well as clay fines,
The well as clay fines using one or more of bentonite, Guangxi white clay or modified clay mixture, partial size≤
0.075mm, the plasticizer mass percent are 2%~3%.
7. the magnesia coating of tundish according to claim 1, which is characterized in that the dispersing agent be sodium tripolyphosphate,
One or more kinds of mixtures of calgon or polycarboxylate water-reducer, the dispersing agent mass percent is 0.3~
0.6wt%.
8. the magnesia coating of tundish according to claim 1, which is characterized in that the anti-knock agent is explosion-proof fiber, institute
The length for the explosion-proof fiber stated is 3~5mm, and mass percent is 0.1~0.3wt%.
9. a kind of preparation method of such as magnesia coating of the described in any item tundish of claim 1-8, which is characterized in that its side
Steps are as follows for method:
(1) all raw materials are weighed by weight ratio；
(2) secondary magnesium carbon material particle and magnesia particle after burning are mixed, and stirred evenly, bonding agent and dispersion is then added
Agent simultaneously stirs evenly mixture is made；
(3) fused magnesite fine powder, plasticizer and anti-knock agent are added in the mixture of step (2) preparation, and stirred evenly, made
At the magnesia coating finished product of tundish.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110511047A (en) * | 2019-09-30 | 2019-11-29 | 瑞泰马钢新材料科技有限公司 | A method of regenerative magnesia-carbon brick is prepared using aquation impregnation technique |
| CN110550961A (en) * | 2019-10-18 | 2019-12-10 | 湛江市红鹰铭德新材料科技有限公司 | Method for preparing tundish coating by recycling waste magnesium slag trap |
| CN110563449A (en) * | 2019-09-29 | 2019-12-13 | 瑞泰马钢新材料科技有限公司 | Environment-friendly magnesia-carbon gunning mix for RH furnace and preparation method thereof |
| CN112457032A (en) * | 2021-01-22 | 2021-03-09 | 北京利尔高温材料股份有限公司 | Tundish pocket brick cup containing reclaimed materials and preparation method thereof |
| CN113134584A (en) * | 2021-04-22 | 2021-07-20 | 本溪市众信冶金炉料有限公司 | Application process of coating for acid casting powder of continuous casting tundish |
| CN114773076A (en) * | 2022-04-18 | 2022-07-22 | 北京联合荣大工程材料股份有限公司 | Self-flowing filling material suitable for lining manufacturing of converter body cavity and preparation method and application thereof |
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| CN110563449A (en) * | 2019-09-29 | 2019-12-13 | 瑞泰马钢新材料科技有限公司 | Environment-friendly magnesia-carbon gunning mix for RH furnace and preparation method thereof |
| CN110511047A (en) * | 2019-09-30 | 2019-11-29 | 瑞泰马钢新材料科技有限公司 | A method of regenerative magnesia-carbon brick is prepared using aquation impregnation technique |
| CN110511047B (en) * | 2019-09-30 | 2022-01-21 | 瑞泰马钢新材料科技有限公司 | Method for preparing regenerated magnesia carbon brick by hydration impregnation treatment process |
| CN110550961A (en) * | 2019-10-18 | 2019-12-10 | 湛江市红鹰铭德新材料科技有限公司 | Method for preparing tundish coating by recycling waste magnesium slag trap |
| CN112457032A (en) * | 2021-01-22 | 2021-03-09 | 北京利尔高温材料股份有限公司 | Tundish pocket brick cup containing reclaimed materials and preparation method thereof |
| CN113134584A (en) * | 2021-04-22 | 2021-07-20 | 本溪市众信冶金炉料有限公司 | Application process of coating for acid casting powder of continuous casting tundish |
| CN114773076A (en) * | 2022-04-18 | 2022-07-22 | 北京联合荣大工程材料股份有限公司 | Self-flowing filling material suitable for lining manufacturing of converter body cavity and preparation method and application thereof |
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Application publication date: 20190924 |