CN107117945A - Castable and tundish pushing off the slag part production technology - Google Patents
Castable and tundish pushing off the slag part production technology Download PDFInfo
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- CN107117945A CN107117945A CN201710248581.4A CN201710248581A CN107117945A CN 107117945 A CN107117945 A CN 107117945A CN 201710248581 A CN201710248581 A CN 201710248581A CN 107117945 A CN107117945 A CN 107117945A
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- magnesia
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- chrome brick
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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
- C04B35/047—Refractories from grain sized mixtures containing chromium oxide or chrome ore
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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
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C04B35/803—
-
- 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
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
-
- 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
-
- 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
- C04B2235/5212—Organic
-
- 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
- C04B2235/5216—Inorganic
- C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
Abstract
The present invention discloses castable and tundish pushing off the slag part production technology, and castable is made up of the raw material of following portions by weight：0.1~1 part of 5~30 parts of useless magnesite-chrome brick, 2~10 parts of fine silica powder, 0.1~0.5 part of compound additive, 0.01~0.1 part of organic fiber and steel fibre that 70~95 parts of magnesia, 4~15 parts of silica, useless magnesite-chrome brick aggregate and the useless magnesite-chrome brick fine powder of magnesia aggregate and magnesia powder composition are constituted.The tundish produced using castable of the present invention pushing off the slag part, its service life length, resistance to molten steel wash away, slag corrosion resistance and antistrip performance are good.
Description
Technical field
The present invention relates to a kind of unshape refractory and its production technology, the company during particularly a kind of process for making
Cast tundish slag trap, dam castable and its production technology.
Background technology
Continuous casting production is to eliminate the dead band in tundish bottom region with the major function of slag trap and dam；Improve steel
Water flow trace, makes MOLTEN STEEL FLOW be carried out along slag liquid level, shortens inclusion floating distance, is conducive to slag to absorb；Promote heat
Flow distribution rationally, makes liquid steel temperature difference at each mouth of a river be reduced to a minimum；Ladle beam is impacted to caused strong vortex
Regional area is limited in, prevents turbulent diffusion from causing surface wave and slag is involved in inside molten steel.Slag blocking wall is set to be conducive to
Promote slag separation, stop that slag enters crystallizer, be conducive in the reasonable layout and molten steel of molten steel flow field being mingled with tundish
The floating of thing, outline molten steel purity is conducive to improving the quality of continuous casting billet.At present, castable tundish slag trap and
Following problem is faced with during dam, use：
(1) magnesia aquation：Because the product of magnesia aquation is magnesium hydroxide, due to density variation (MgO:3.58g/cm3,
Mg(OH)2:2.36g/cm3), volumetric expansion about 200%, in production, storage and transport process, it is easy to crack and powder phenomenon-tion；
Meanwhile, shepardite starts a large amount of dehydrations in heating process, and inside produces larger vapour pressure and thermal stress, is easy to during baking
Generation cracking even Decrepitation Phenomena, has severely impacted product properties.
(2) elevated temperature strength：Castable typically has higher baked strength, up to 100MPa or so, fully meets
Scene transport and installation requirement, but elevated temperature strength is universal relatively low, typically in 0.5~1.5MPa or so.When by high-temperature molten steel
When soaking or wash away for a long time, easily there is deformation, punch through or even the phenomenon that collapses, have impact on the normal pushing off the slag effect of product.
(3) thermal shock resistance：Due to the thermal coefficient of expansion big (13.5 × 10 of magnesia raw material-6/ DEG C), modulus of elasticity it is big (2.1 ×
105MPa), it is internal to produce very big thermal stress in the use environment of rapid heat cycle, cause material to hold in use
It is also easy to produce peeling and chip off-falling.
(4) permeability resistance：Basic slag based on the erosion of reaction, permeates less to the magnalium matter prefabricated component of partial neutral.
However, basic slag to magnesia or magnalium matter prefabricated component then based on infiltration, while with course of dissolution.After slag penetration further
Aggravate erosion behavior, reduce the performance of magnesia refractories.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of castable having good workability and work
Skill simple tundish pushing off the slag part production technology so that the hydration resistance of the tundish produced pushing off the slag part
Good, elevated temperature strength is high, during product use resistance to molten steel wash away, slag corrosion resistance and antistrip performance it is good, the life-span increases substantially.
The technical proposal of the invention is realized in this way：Castable, is made up of the raw material of following portions by weight：Magnesia
What 70~95 parts of magnesia, 4~15 parts of silica, useless magnesite-chrome brick aggregate and the useless magnesite-chrome brick fine powder of aggregate and magnesia powder composition were constituted
Useless 5~30 parts of magnesite-chrome brick, 2~10 parts of fine silica powder, 0.1~0.5 part of compound additive, 0.01~0.1 part of organic fiber
And 0.1~1 part of steel fibre.
Above-mentioned castable, the magnesia for MgO mass fraction be more than or equal to 90% middle-grade magnesite clinker or
Fused magnesite；And the magnesia is less than or equal to 8mm by granularity and is more than 5mm magnesia, granularity less than or equal to 5mm and is more than
3mm magnesia, granularity are less than or equal to 3mm and magnesia and granularity more than 1mm are less than or equal to 1mm and the magnesia group more than 0mm
Into granularity is less than or equal to 8mm and the magnesia more than 5mm accounts for magnesia total weight percent and is less than or equal to 5mm for 15-21%, granularity
And the magnesia more than 3mm accounts for magnesia total weight percent and is less than or equal to 3mm for 15-20%, granularity and is more than or equal to 1mm magnesia
It is respectively that the magnesia of 20-30% and granularity less than or equal to 0.088mm and more than 0mm accounts for magnesia to account for magnesia total weight percent
Percentage by weight is respectively 30-40%；Granularity is less than or equal to 0.088mm and the magnesia more than 0mm is referred to as magnesia powder, remaining magnesium
Sand is referred to as magnesia aggregate.
Above-mentioned castable, the silica is more than or equal to 98% purity quartzite or molten for SiO2 mass fraction
Fused silica sand.
Above-mentioned castable, quartz sand and granularity of the quartz sand by granularity less than or equal to 3mm and more than 1mm is small
Constituted in the quartz sand equal to 1mm and more than 0mm；Granularity is less than or equal to 3mm and the quartz sand more than 1mm accounts for quartz sand gross weight
Percentage is 20-60%, quartz sand of the granularity less than or equal to 1mm and more than 0mm accounts for quartz sand total weight percent and is respectively
40-80%.
Cr2O3 weight percentages are more than or equal to 12% in above-mentioned castable, the useless magnesite-chrome brick；The useless magnesium
The grain size distribution of chrome brick by granularity be less than or equal to 1mm and more than 0.088mm useless magnesite-chrome brick and granularity be less than or equal to 0.088mm and
Useless magnesite-chrome brick composition more than 0mm；Granularity is less than or equal to 1mm and the useless magnesite-chrome brick more than 0.088mm accounts for useless magnesite-chrome brick gross weight
Percentage is 5-60%, granularity is less than or equal to 0.088mm and the useless magnesite-chrome brick more than 0mm accounts for useless magnesite-chrome brick total weight percent
Respectively 40-95%；Granularity is less than or equal to 0.088mm and the useless magnesite-chrome brick more than 0mm is referred to as useless magnesite-chrome brick fine powder, remaining useless magnesium
Chrome brick is referred to as useless magnesite-chrome brick aggregate.
Above-mentioned castable, the compound additive is in sodium tripolyphosphate, calgon and Secar71 cement
It is one or more kinds of.
Above-mentioned castable, granularity≤10mm of magnesia, silica granularity≤3mm, fine silica powder granularity is 2-7 μ
M, the mesh of compound additive granularity≤200, organic fiber length≤3mm, length of steel fiber is 20~30mm；Organic fiber is poly- second
One kind in alkene fiber, polypropylene fibre, polyvinyl chloride, polyester fiber, Fypro, paper fiber and flaxen fiber or it is a kind of with
On.
Using the tundish pushing off the slag part production technology of castable, comprise the following steps：
(1) castable is prepared as raw material, castable is made up of the raw material of following portions by weight：Magnesia aggregate
70~95 parts of magnesia being constituted with magnesia powder, 4~15 parts of silica, useless 5~30 parts of magnesite-chrome brick, 2~10 parts of fine silica powder,
0.1~1 part of 0.1~0.5 part of compound additive, 0.01~0.1 part of organic fiber and steel fibre；In advance by the magnesia in raw material
Aggregate, silica, useless magnesite-chrome brick aggregate and fine silica powder are added and are mixed evenly in agitator, obtain component A；Magnesia aggregate
Refer to that granularity is more than 0.088mm aggregate with useless magnesite-chrome brick aggregate；
(2) and then by magnesia powder, useless magnesite-chrome brick fine powder, compound additive and organic fiber add in homogenizer and mix
Conjunction stirs, and obtains component B；Magnesia powder and useless magnesite-chrome brick fine powder each mean that granularity is less than or equal to 0.088mm and is more than 0mm's
Fine powder；
(3) then component A and component B are mixed, stirred 1~3 minute, be well mixed each material；
(4) suitable amount of water is slowly added water to, amount of water is 4wt%~6wt% of raw material gross mass, stirs 1~10 point
After clock, steel fibre is sprinkled into material, is followed by stirring for 3~5 minutes；
(5) discharging, vibration moulding, maintenance, baking and packaging produce tundish pushing off the slag part.
Above-mentioned tundish pushing off the slag part production technology, the mixing time that adds water is 5~10 minute；The vibration moulding time
For 2~5 minutes；The maintenance is that band mould is conserved in curing room, curing time >=8 hour, 80~120 DEG C of curing temperature.
Above-mentioned tundish pushing off the slag part production technology, the baking is carried out in hot-blast stove drying hole, baking time
For 72 hours, baking temperature >=250 DEG C.
The beneficial effects of the invention are as follows：
1st, the present invention is added to after castable using quartzy and useless magnesite-chrome brick, quartzy and useless magnesite-chrome brick synergy energy
Enough generations for effectively suppressing magnesia hydrated product, solve the water that castable tundish slag trap and dam are present
Change problem of Cracking.Castable of the present invention can be used for tundish slag blocking wall, dam, shock plate, flow straightener and mouth of a river seat
The production of brick, the part such as the tundish pushing off the slag produced using castable of the present invention it is functional, with good
Workability, construction body not aquation in maintenance, baking process do not ftracture, and long-distance to meet with sufficiently high intensity
Transport and lifting；Online baking does not burst, pour do not cave in during steel use, the chemical erosion of resistance to erosion, resistance to molten steel and slag, energy
Meet the requirement of many stove continuous casting steel machines.
2nd, the present invention uses and increasingly generates forsterite thing phase under magnesia and silica collective effect, high temperature, by controlling silicon
Stone granularity and its addition, make castable possess enough elevated temperature strength and Properties of High Temperature Creep, it is ensured that tundish pushing off the slag
The excellent high temperature resistant molten steel performance of flushing of part；Simultaneously using compound additive of good performance, organic fiber and steel fibre,
While improving product normal temperature strength, it is ensured that the workability and performance of product.
3rd, the present invention adds the quartz sand that granularity is 1-3mm and 0-1mm in castable, passes through quartz sand and magnesia
Reaction in-situ produces 0.3% or so microdilatancy, and the volume stability of product is good, and elevated temperature strength is high, and thermal shock resistance is than pure magnesium
Matter product improves more than 50%.
4th, the present invention is while quartz sand is added, then cooperates with introducing Cr2O3Content is not less than 12wt% 0.088-1mm
The useless useless magnesite-chrome brick fine powder of magnesite-chrome brick fine aggregate and 0-0.088mm.Wherein, useless magnesite-chrome brick can directly absorb and capture infiltration product
In MnO, FeO, Al2O3Etc. slag composition；Meanwhile, give up magnesite-chrome brick and quartzy silicate of the reaction in-situ formation containing chromium under high temperature
Liquid phase, dramatically increases liquid phase viscosity, hinders slag further to be permeated to material bodies, improves the anti-erosion and permeability resistance of product.
5th, the present invention reclaims useless magnesite-chrome brick for castable, while capabilities of refractory materials is improved, effectively
Refractory material resources have been saved, the utilization rate of refractory raw material is improved, waste material utilization, cost efficiency is realized.
6th, in the prior art it is generally acknowledged that SiO2With the CaO in slag and reaction generation low-melting-point material phase, slag blocking wall is directed at
Quickening is etched so as to lifetime, therefore general slag blocking wall castable can control SiO2Content is ultralow better.Such as:Prior art
In slag blocking wall it is all mostly be the pre- part of high alumina castable, the SiO in high alumina castable2Mainly with Impure forms in high aluminium material
Introduce and used SiO2Micro mist is produced.
And the material of main part in castable of the present invention is magnesium silicon, largely SiO is introduced in castable2, particularly
It is a large amount of to introduce SiO in quartzy form2, breach traditional intrinsic notion；With the castable phase containing forsterite, magnesia and corundum
Than quartzy thermal conductivity at high temperature is good, linear expansivity is small, and this performance makes the slag blocking wall in tundish when rigid connection is by molten steel
With good thermal shock resistance, and quartzy and useless magnesite-chrome brick synergy can effectively suppress the production of magnesia hydrated product
It is raw so that the bulk life time of slag blocking wall improves more than 20%；As use time extends, quartz can be progressively anti-with magnesia under high temperature
Forsterite should be generated, forsterite resists invading property preferably, and Linear change rate is relatively low, and barricade material is fine and close, not only increases intensity,
And slag hardly possible penetrates into internal, corrosion resistance is good, so that service life is long.
It is of the invention to be kept off with the slightly biased acid high aluminium material of existing neutrality due to making steel mainly alkalescence steel-making in the prior art
Wall is compared, and magnesia barricade erosion resisting is stronger, long lifespan, and alkaline resistance to material also has certain absorb to be mingled with effect.
7th, in the prior art, some steel mills are toasted in tundish using preceding, typically at 1000 DEG C or so, are had very
It is lower to baking temperature；The liquid steel temperature of tundish is poured at least in 1550 DEG C or so, even more high (1590 DEG C)；So it is placed on
Slag blocking wall in tundish is just subjected to violent temperature change, produces very big stress and then big line change occurs and collapse, i.e.,
Thermal shock resistance is bad.Though traditional castable thermal conductivity is good high temperature under linear expansion coefficient it is still larger, be formulated in addition not
Reasonable and slag blocking wall is of a relatively loose and then low intensity, poor performance occurs, and existing castable barricade thermal shock resistance is not
Well, intensity is relatively low rinses without anti-impact.Tundish of the present invention with pushing off the slag part when in use, the temperature of molten steel 1500 DEG C~
1590 DEG C, when pouring steel, be resistant to the impact of high-temperature molten steel and produce erosive wear, and be resistant to during steel is poured by
To the chemical erosion of molten steel and slag, service life is long.
Embodiment
Embodiment 1
The present embodiment castable is made up of following raw materials：90 kilograms of the magnesia of magnesia aggregate and magnesia powder composition,
12 kilograms of useless magnesite-chrome brick, the SiO of 6 kilograms of silica, useless magnesite-chrome brick aggregate and useless magnesite-chrome brick fine powder composition23.5 kilograms of micro mist, trimerization
0.2 kilogram of sodium phosphate, 0.05 kilogram of organic fiber, 0.5 kilogram of steel fibre.
The fused magnesite that the mass fraction that the magnesia is MgO is 93%；And the magnesia is less than or equal to 8mm by granularity
And magnesia, granularity magnesium less than or equal to 3mm and more than 1mm of the magnesia, granularity more than 5mm less than or equal to 5mm and more than 3mm
Sand and granularity are less than or equal to 0.088mm and the magnesia more than 0mm is constituted, and granularity is less than or equal to 8mm and the magnesia more than 5mm
It is respectively that magnesia of the 15%, granularity less than or equal to 5mm and more than 3mm accounts for magnesia total weight percent to account for magnesia total weight percent
Respectively 15%, it is respectively 20% and grain that magnesia of the granularity less than or equal to 3mm and more than 1mm, which accounts for magnesia total weight percent,
It is respectively 30% that magnesia of the degree less than or equal to 0.088mm and more than 0mm, which accounts for magnesia percentage by weight,；Granularity is less than or equal to
0.088mm and it is referred to as magnesia powder more than 0mm magnesia, remaining magnesia is referred to as magnesia aggregate.
The silica is SiO2Mass fraction be 98% tekite sand, the tekite sand by granularity be less than etc.
In 3mm and more than 1mm quartz sand and granularity be less than or equal to 1mm and more than 0mm quartz sand constitute；Granularity is less than or equal to
3mm and quartz sand more than 1mm account for quartz sand total weight percent for 20%, granularity be less than or equal to 1mm and the quartz more than 0mm
It is respectively 80% that sand, which accounts for quartz sand total weight percent,.
Cr in the useless magnesite-chrome brick2O3Weight percentage is 12%；The grain size distribution of the useless magnesite-chrome brick is less than by granularity
Useless magnesite-chrome brick and granularity equal to 1mm and more than 0.088mm are less than or equal to 0.088mm and the useless magnesite-chrome brick more than 0mm is constituted；Grain
Useless magnesite-chrome brick of the degree less than or equal to 1mm and more than 0.088mm accounts for useless magnesite-chrome brick total weight percent and is less than or equal to for 5%, granularity
0.088mm and to account for useless magnesite-chrome brick total weight percent be respectively 95% for useless magnesite-chrome brick more than 0mm；Granularity is less than or equal to
0.088mm and useless magnesite-chrome brick more than 0mm is referred to as useless magnesite-chrome brick fine powder, remaining useless magnesite-chrome brick is referred to as useless magnesite-chrome brick aggregate.
Fine silica powder granularity is 2-7 μm, and the mesh of sodium tripolyphosphate granularity≤200, organic fiber length≤3mm, steel is fine
Dimension length is 20~30mm；Organic fiber in the present embodiment is polypropylene fibre.
Utilize the tundish of the present embodiment castable slag blocking wall production technology, it is characterised in that including following step
Suddenly：
(1) magnesia aggregate in raw material, tekite sand, useless magnesite-chrome brick aggregate and fine silica powder are added and stirred in advance
Mix in device and be mixed evenly, obtain component A；Magnesia aggregate and useless magnesite-chrome brick aggregate refer to that granularity is more than 0.088mm aggregate；
(2) and then by magnesia powder, useless magnesite-chrome brick fine powder, compound additive and organic fiber add in homogenizer and mix
Conjunction stirs, and obtains component B；Magnesia powder and useless magnesite-chrome brick fine powder each mean that granularity is less than or equal to 0.088mm and is more than 0mm's
Fine powder；
(3) then component A and component B are mixed, stirred 3 minutes, be well mixed each material；
(4) add water, amount of water is the 5wt% of raw material gross mass, after stirring 5 minutes, steel fibre is sprinkled into material, connect
Stirring 3 minutes；
(5) discharging, vibration moulding, maintenance, baking and packaging produce tundish pushing off the slag part；The vibration moulding time is 2
Minute；The maintenance is that band mould is conserved in curing room, and curing time is 8 hours, 120 DEG C of curing temperature；The baking is
Dried in hot-blast stove drying hole, baking time is 72 hours, baking temperature is 250 DEG C.
Embodiment 2
The present embodiment castable is made up of following raw materials：90 kilograms of the magnesia of magnesia aggregate and magnesia powder composition,
30 kilograms of useless magnesite-chrome brick, the SiO of 15 kilograms of silica, useless magnesite-chrome brick aggregate and useless magnesite-chrome brick fine powder composition24.5 kilograms of micro mist, three
0.3 kilogram of polyphosphate sodium, 0.05 kilogram of organic fiber, 0.5 kilogram of steel fibre.
The fused magnesite that the mass fraction that the magnesia is MgO is 90%；And the magnesia is less than or equal to 8mm by granularity
And magnesia, granularity magnesium less than or equal to 3mm and more than 1mm of the magnesia, granularity more than 5mm less than or equal to 5mm and more than 3mm
Sand and granularity are less than or equal to 0.088mm and the magnesia more than 0mm is constituted, and granularity is less than or equal to 8mm and the magnesia more than 5mm
It is respectively that magnesia of the 18%, granularity less than or equal to 5mm and more than 3mm accounts for magnesia total weight percent to account for magnesia total weight percent
Respectively 17%, it is respectively 25% and grain that magnesia of the granularity less than or equal to 3mm and more than 1mm, which accounts for magnesia total weight percent,
It is respectively 35% that magnesia of the degree less than or equal to 0.088mm and more than 0mm, which accounts for magnesia percentage by weight,；Granularity is less than or equal to
0.088mm and it is referred to as magnesia powder more than 0mm magnesia, remaining magnesia is referred to as magnesia aggregate.
The silica is SiO2Mass fraction be 99% tekite sand, the tekite sand by granularity be less than etc.
In 3mm and more than 1mm quartz sand and granularity be less than or equal to 1mm and more than 0mm quartz sand constitute；Granularity is less than or equal to
3mm and quartz sand more than 1mm account for quartz sand total weight percent for 60%, granularity be less than or equal to 1mm and the quartz more than 0mm
It is respectively 40% that sand, which accounts for quartz sand total weight percent,.
Cr in the useless magnesite-chrome brick2O3Weight percentage is 15%；The grain size distribution of the useless magnesite-chrome brick is less than by granularity
Useless magnesite-chrome brick and granularity equal to 1mm and more than 0.088mm are less than or equal to 0.088mm and the useless magnesite-chrome brick more than 0mm is constituted；Grain
Useless magnesite-chrome brick of the degree less than or equal to 1mm and more than 0.088mm accounts for useless magnesite-chrome brick total weight percent and is less than or equal to for 60%, granularity
0.088mm and to account for useless magnesite-chrome brick total weight percent be respectively 40% for useless magnesite-chrome brick more than 0mm；Granularity is less than or equal to
0.088mm and useless magnesite-chrome brick more than 0mm is referred to as useless magnesite-chrome brick fine powder, remaining useless magnesite-chrome brick is referred to as useless magnesite-chrome brick aggregate.
Fine silica powder granularity is 5 μm, the mesh of sodium tripolyphosphate granularity≤200, organic fiber length≤3mm, steel fibre
Length is 20~30mm；Organic fiber in the present embodiment is polypropylene fibre.
The tundish of the present embodiment castable slag blocking wall production technology, comprises the following steps：
(1) magnesia aggregate in raw material, tekite sand, useless magnesite-chrome brick aggregate and fine silica powder are added and stirred in advance
Mix in device and be mixed evenly, obtain component A；Magnesia aggregate and useless magnesite-chrome brick aggregate refer to that granularity is more than 0.088mm aggregate；
(2) and then by magnesia powder, useless magnesite-chrome brick fine powder, compound additive and organic fiber add in homogenizer and mix
Conjunction stirs, and obtains component B；Magnesia powder and useless magnesite-chrome brick fine powder each mean that granularity is less than or equal to 0.088mm and is more than 0mm's
Fine powder；
(3) then component A and component B are mixed, stirred 2 minutes, be well mixed each material；
(4) add water, amount of water is the 5wt% of raw material gross mass, after stirring 8 minutes, steel fibre is sprinkled into material, connect
Stirring 5 minutes；
(5) discharging, vibration moulding, maintenance, baking and packaging produce tundish pushing off the slag part；The vibration moulding time is 3
Minute；The maintenance is that band mould is conserved in curing room, and curing time is 15 hours, 80 DEG C of curing temperature；The baking is
Dried in hot-blast stove drying hole, baking time is 72 hours, baking temperature is 250 DEG C.
Embodiment 3
The present embodiment castable is made up of following raw materials：90 kilograms of magnesia, 4 kilograms of silica, useless magnesite-chrome brick aggregate and
30 kilograms of useless magnesite-chrome brick, the SiO of useless magnesite-chrome brick fine powder composition25 kilograms of micro mist, 0.1 kilogram of calgon, organic fiber 0.05
Kilogram, 0.5 kilogram of steel fibre.
The fused magnesite that the mass fraction that the magnesia is MgO is 94%；And the magnesia is less than or equal to 8mm by granularity
And magnesia, granularity magnesium less than or equal to 3mm and more than 1mm of the magnesia, granularity more than 5mm less than or equal to 5mm and more than 3mm
Sand and granularity are less than or equal to 0.088mm and the magnesia more than 0mm is constituted, and granularity is less than or equal to 8mm and the magnesia more than 5mm
It is respectively that magnesia of the 21%, granularity less than or equal to 5mm and more than 3mm accounts for magnesia total weight percent to account for magnesia total weight percent
Respectively 20%, it is respectively 30% and grain that magnesia of the granularity less than or equal to 3mm and more than 1mm, which accounts for magnesia total weight percent,
It is respectively 40% that magnesia of the degree less than or equal to 0.088mm and more than 0mm, which accounts for magnesia percentage by weight,；Granularity is less than or equal to
0.088mm and it is referred to as magnesia powder more than 0mm magnesia, remaining magnesia is referred to as magnesia aggregate.
The silica is SiO2Mass fraction be 98.6% tekite sand, the tekite sand is less than by granularity
Quartz sand and granularity equal to 3mm and more than 1mm are less than or equal to 1mm and the quartz sand more than 0mm is constituted；Granularity is less than or equal to
3mm and quartz sand more than 1mm account for quartz sand total weight percent for 25%, granularity be less than or equal to 1mm and the quartz more than 0mm
It is respectively 75% that sand, which accounts for quartz sand total weight percent,.
Cr in the useless magnesite-chrome brick2O3Weight percentage is 13%；The grain size distribution of the useless magnesite-chrome brick is less than by granularity
Useless magnesite-chrome brick and granularity equal to 1mm and more than 0.088mm are less than or equal to 0.088mm and the useless magnesite-chrome brick more than 0mm is constituted；Grain
Useless magnesite-chrome brick of the degree less than or equal to 1mm and more than 0.088mm accounts for useless magnesite-chrome brick total weight percent and is less than or equal to for 20%, granularity
0.088mm and to account for useless magnesite-chrome brick total weight percent be respectively 80% for useless magnesite-chrome brick more than 0mm；Granularity is less than or equal to
0.088mm and useless magnesite-chrome brick more than 0mm is referred to as useless magnesite-chrome brick fine powder, remaining useless magnesite-chrome brick is referred to as useless magnesite-chrome brick aggregate.
Fine silica powder granularity is 5 μm, the mesh of calgon granularity≤200, organic fiber length≤3mm, steel fibre
Length is 20~30mm；Organic fiber in the present embodiment is polypropylene fibre.
Utilize the tundish of the present embodiment castable slag blocking wall production technology, it is characterised in that including following step
Suddenly：
(1) magnesia aggregate in raw material, tekite sand, useless magnesite-chrome brick aggregate and fine silica powder are added and stirred in advance
Mix in device and be mixed evenly, obtain component A；Magnesia aggregate and useless magnesite-chrome brick aggregate refer to that granularity is more than 0.088mm aggregate；
(2) and then by magnesia powder, useless magnesite-chrome brick fine powder, compound additive and organic fiber add in homogenizer and mix
Conjunction stirs, and obtains component B；Magnesia powder and useless magnesite-chrome brick fine powder each mean that granularity is less than or equal to 0.088mm and is more than 0mm's
Fine powder；
(3) then component A and component B are mixed, stirred 1 minute, be well mixed each material；
(4) add water, amount of water is the 4.5wt% of raw material gross mass, and after stirring 10 minutes, steel fibre is sprinkled into material
In, it is followed by stirring for 5 minutes；
(5) discharging, vibration moulding, maintenance, baking and packaging produce tundish pushing off the slag part；The vibration moulding time is 5
Minute；The maintenance is that band mould is conserved in curing room, and curing time is 15 hours, 100 DEG C of curing temperature；The baking is
Dried in hot-blast stove drying hole, drying time is 72 hours, baking temperature is 300 DEG C.
Embodiment 4
The present embodiment castable is made up of following raw materials：90 kilograms of the magnesia of magnesia aggregate and magnesia powder composition,
5 kilograms of useless magnesite-chrome brick, the SiO of 15 kilograms of silica, useless magnesite-chrome brick aggregate and useless magnesite-chrome brick fine powder composition24.5 kilograms of micro mist, trimerization
0.3 kilogram of sodium phosphate and calgon【Sodium tripolyphosphate and calgon are according to mass ratio 1:1 proportioning】, organic fiber
0.05 kilogram, 0.5 kilogram of steel fibre.
The fused magnesite that the mass fraction that the magnesia is MgO is 93%；And the magnesia is less than or equal to 8mm by granularity
And magnesia, granularity magnesium less than or equal to 3mm and more than 1mm of the magnesia, granularity more than 5mm less than or equal to 5mm and more than 3mm
Sand and granularity are less than or equal to 0.088mm and the magnesia more than 0mm is constituted, and granularity is less than or equal to 8mm and the magnesia more than 5mm
It is respectively that magnesia of the 15%, granularity less than or equal to 5mm and more than 3mm accounts for magnesia total weight percent to account for magnesia total weight percent
Respectively 20%, it is respectively 20% and grain that magnesia of the granularity less than or equal to 3mm and more than 1mm, which accounts for magnesia total weight percent,
It is respectively 40% that magnesia of the degree less than or equal to 0.088mm and more than 0mm, which accounts for magnesia percentage by weight,；Granularity is less than or equal to
0.088mm and it is referred to as magnesia powder more than 0mm magnesia, remaining magnesia is referred to as magnesia aggregate.
The silica is SiO2Mass fraction be 99% tekite sand, the tekite sand by granularity be less than etc.
In 3mm and more than 1mm quartz sand and granularity be less than or equal to 1mm and more than 0mm quartz sand constitute；Granularity is less than or equal to
3mm and quartz sand more than 1mm account for quartz sand total weight percent for 30%, granularity be less than or equal to 1mm and the quartz more than 0mm
It is respectively 70% that sand, which accounts for quartz sand total weight percent,.
Cr in the useless magnesite-chrome brick2O3Weight percentage is 15%；The grain size distribution of the useless magnesite-chrome brick is less than by granularity
Useless magnesite-chrome brick and granularity equal to 1mm and more than 0.088mm are less than or equal to 0.088mm and the useless magnesite-chrome brick more than 0mm is constituted；Grain
Useless magnesite-chrome brick of the degree less than or equal to 1mm and more than 0.088mm accounts for useless magnesite-chrome brick total weight percent and is less than or equal to for 10%, granularity
0.088mm and to account for useless magnesite-chrome brick total weight percent be respectively 90% for useless magnesite-chrome brick more than 0mm；Granularity is less than or equal to
0.088mm and useless magnesite-chrome brick more than 0mm is referred to as useless magnesite-chrome brick fine powder, remaining useless magnesite-chrome brick is referred to as useless magnesite-chrome brick aggregate.
Fine silica powder granularity is 5 μm, and the mesh of the granularity of sodium tripolyphosphate and hexapolyphosphate sodium≤200, organic fiber is long
Degree≤3mm, length of steel fiber is 20~30mm；Organic fiber in the present embodiment is polypropylene fibre.
The tundish of the present embodiment castable slag blocking wall production technology, comprises the following steps：
(1) magnesia aggregate in raw material, tekite sand, useless magnesite-chrome brick aggregate and fine silica powder are added and stirred in advance
Mix in device and be mixed evenly, obtain component A；Magnesia aggregate and useless magnesite-chrome brick aggregate refer to that granularity is more than 0.088mm aggregate；
(2) and then by magnesia powder, useless magnesite-chrome brick fine powder, compound additive and organic fiber add in homogenizer and mix
Conjunction stirs, and obtains component B；Magnesia powder and useless magnesite-chrome brick fine powder each mean that granularity is less than or equal to 0.088mm and is more than 0mm's
Fine powder；
(3) then component A and component B are mixed, stirred 2 minutes, be well mixed each material；
(4) add water, amount of water is the 5wt% of raw material gross mass, after stirring 8 minutes, steel fibre is sprinkled into material, connect
Stirring 5 minutes；
(5) discharging, vibration moulding, maintenance, baking and packaging produce tundish pushing off the slag part；The vibration moulding time is 3
Minute；The maintenance is that band mould is conserved in curing room, and curing time is 15 hours, 80 DEG C of curing temperature；The baking is
Dried in hot-blast stove drying hole, baking time is 72 hours, baking temperature is 250 DEG C.
The particular product performance parameters that embodiment 1- embodiments 4 are produced are as follows：
Note：Thermal shock resistance test condition：Air-cooled 10 times, temperature is 1100 DEG C.
Above-described embodiment is only intended to clearly illustrate the invention example, and not has to the invention
The restriction of body embodiment.For those of ordinary skill in the field, it can also make on the basis of the above description
Other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all the present invention
Guarantor of any obvious changes or variations extended out within spirit and principle still in the invention claim
Protect among scope.
Claims (10)
1. castable, it is characterised in that be made up of the raw material of following portions by weight：What magnesia aggregate and magnesia powder were constituted
5~30 parts of useless magnesite-chrome brick, dioxy that 70~95 parts of magnesia, 4~15 parts of silica, useless magnesite-chrome brick aggregate and useless magnesite-chrome brick fine powder are constituted
0.1~1 part of 2~10 parts of SiClx micro mist, 0.1~0.5 part of compound additive, 0.01~0.1 part of organic fiber and steel fibre.
2. castable according to claim 1, it is characterised in that the magnesia be more than for MgO mass fraction or
Middle-grade magnesite clinker or fused magnesite equal to 90%；And the magnesia is less than or equal to 8mm by granularity and is more than 5mm magnesium
Sand, granularity are less than or equal to 5mm and the magnesia and granularity of magnesia, granularity less than or equal to 3mm and more than 1mm more than 3mm are less than
Magnesia equal to 1mm and more than 0mm is constituted, and magnesia of the granularity less than or equal to 8mm and more than 5mm accounts for magnesia total weight percent and is
15-21%, granularity be less than or equal to 5mm and more than 3mm magnesia account for magnesia total weight percent for 15-20%, granularity be less than etc.
In 3mm and magnesia more than or equal to 1mm, to account for magnesia total weight percent be respectively that 20-30% and granularity are less than or equal to
0.088mm and account for magnesia percentage by weight respectively 30-40% more than 0mm magnesia；Granularity is less than or equal to 0.088mm and is more than
0mm magnesia is referred to as magnesia powder, and remaining magnesia is referred to as magnesia aggregate.
3. castable according to claim 1, it is characterised in that the silica is SiO2Mass fraction be more than or
Purity quartzite or tekite sand equal to 98%.
4. castable according to claim 3, it is characterised in that the quartz sand by granularity be less than or equal to 3mm and
Quartz sand and granularity more than 1mm are less than or equal to 1mm and the quartz sand more than 0mm is constituted；Granularity is less than or equal to 3mm and is more than
1mm quartz sand accounts for quartz sand of the quartz sand total weight percent for 20-60%, granularity less than or equal to 1mm and more than 0mm and accounted for
Quartz sand total weight percent is respectively 40-80%.
5. castable according to claim 1, it is characterised in that Cr in the useless magnesite-chrome brick2O3Weight percentage
More than or equal to 12%；The grain size distribution of the useless magnesite-chrome brick is less than or equal to 1mm by granularity and is more than 0.088mm useless magnesite-chrome brick
It is less than or equal to 0.088mm with granularity and is more than 0mm useless magnesite-chrome brick composition；Granularity is less than or equal to 1mm and useless more than 0.088mm
Magnesite-chrome brick accounts for useless magnesite-chrome brick total weight percent and is less than or equal to 0.088mm for 5-60%, granularity and is more than 0mm useless magnesite-chrome brick
Account for useless magnesite-chrome brick total weight percent respectively 40-95%；Granularity is less than or equal to 0.088mm and the useless magnesite-chrome brick more than 0mm claims
For useless magnesite-chrome brick fine powder, remaining useless magnesite-chrome brick is referred to as useless magnesite-chrome brick aggregate.
6. castable according to claim 1, it is characterised in that the compound additive is sodium tripolyphosphate, six
One or more in sodium metaphosphate and Secar71 cement.
7. castable according to claim 1, it is characterised in that granularity≤10mm of magnesia, silica granularity≤
3mm, fine silica powder granularity is 2-7 μm, and the mesh of compound additive granularity≤200, organic fiber length≤3mm, steel fibre is long
Spend for 20~30mm；Organic fiber is polyethylene fibre, polypropylene fibre, polyvinyl chloride, polyester fiber, Fypro, paper
One or more in fiber and flaxen fiber.
8. utilize the tundish pushing off the slag part production technology of any castables of claim 1-7, it is characterised in that
Comprise the following steps：
(1) castable is prepared as raw material, castable is made up of the raw material of following portions by weight：Magnesia aggregate and magnesium
It is 70~95 parts of the magnesia of sand fine powder composition, 4~15 parts of silica, useless 5~30 parts of magnesite-chrome brick, 2~10 parts of fine silica powder, compound
0.1~1 part of 0.1~0.5 part of additive, 0.01~0.1 part of organic fiber and steel fibre；In advance by the magnesia bone in raw material
Material, silica, useless magnesite-chrome brick aggregate and fine silica powder are added and are mixed evenly in agitator, obtain component A；Magnesia aggregate and
Useless magnesite-chrome brick aggregate refers to that granularity is more than 0.088mm aggregate；
(2) and then by magnesia powder, useless magnesite-chrome brick fine powder, compound additive and organic fiber add to mix in homogenizer and stir
Mix uniform, obtain component B；Magnesia powder and useless magnesite-chrome brick fine powder each mean that granularity is less than or equal to 0.088mm and thin more than 0mm
Powder；
(3) then component A and component B are mixed, stirred 1~3 minute, be well mixed each material；
(4) slowly add water to suitable amount of water, amount of water is 4wt%~6wt% of raw material gross mass, stirring 1~10 minute it
Afterwards, steel fibre is sprinkled into material, be followed by stirring for 3~5 minutes；
(5) discharging, vibration moulding, maintenance, baking and packaging produce tundish pushing off the slag part.
9. tundish according to claim 8 pushing off the slag part production technology, it is characterised in that the mixing time that adds water
For 5~10 minutes；The vibration moulding time is 2~5 minutes；The maintenance is that band mould is conserved in curing room, curing time >=8
Hour, 80~120 DEG C of curing temperature.
10. tundish according to claim 8 pushing off the slag part production technology, it is characterised in that the baking is in heat
Carried out in wind furnace drying hole, baking time is 72 hours, baking temperature >=250 DEG C.
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| CN107793171A (en) * | 2017-11-22 | 2018-03-13 | 海城利尔麦格西塔材料有限公司 | A kind of white olivine tundish dry material and production method |
| CN108640695A (en) * | 2018-06-19 | 2018-10-12 | 佘春霞 | A kind of blast furnace ironmaking cracking resistance swing runner castable |
| CN110451931A (en) * | 2018-05-08 | 2019-11-15 | 山东国茂冶金材料有限公司 | A kind of Split assembled type tundish slag blocking wall and its preparation application method |
| CN112479685A (en) * | 2020-11-06 | 2021-03-12 | 鞍山市和丰耐火材料有限公司 | High-quality RH gunning mix with large amount of cast iron powder and production method thereof |
| CN112479725A (en) * | 2020-12-01 | 2021-03-12 | 中冶焦耐(大连)工程技术有限公司 | Brick for dry quenching furnace cooling chamber and preparation method thereof |
| CN113416063A (en) * | 2021-06-01 | 2021-09-21 | 海城利尔麦格西塔材料有限公司 | High-temperature-resistant magnesium-chromium castable prepared from magnesium-chromium waste bricks |
| CN114133216A (en) * | 2022-02-07 | 2022-03-04 | 北京利尔高温材料股份有限公司 | Tundish slag blocking wall castable and preparation method thereof |
| CN115073143A (en) * | 2022-07-22 | 2022-09-20 | 成都府天高温材料科技有限公司 | Forsterite tundish slag blocking wall castable and preparation process thereof |
| CN115196980A (en) * | 2022-06-24 | 2022-10-18 | 偃师中岳耐火材料有限公司 | Preparation method of magnesia-carbon refractory castable |
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| CN110451931B (en) * | 2018-05-08 | 2021-08-24 | 山东国茂冶金材料有限公司 | Slag blocking wall for split combined tundish and preparation and use method thereof |
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| CN112479685A (en) * | 2020-11-06 | 2021-03-12 | 鞍山市和丰耐火材料有限公司 | High-quality RH gunning mix with large amount of cast iron powder and production method thereof |
| CN112479725A (en) * | 2020-12-01 | 2021-03-12 | 中冶焦耐(大连)工程技术有限公司 | Brick for dry quenching furnace cooling chamber and preparation method thereof |
| CN113416063A (en) * | 2021-06-01 | 2021-09-21 | 海城利尔麦格西塔材料有限公司 | High-temperature-resistant magnesium-chromium castable prepared from magnesium-chromium waste bricks |
| CN114133216A (en) * | 2022-02-07 | 2022-03-04 | 北京利尔高温材料股份有限公司 | Tundish slag blocking wall castable and preparation method thereof |
| CN115196980A (en) * | 2022-06-24 | 2022-10-18 | 偃师中岳耐火材料有限公司 | Preparation method of magnesia-carbon refractory castable |
| CN115073143A (en) * | 2022-07-22 | 2022-09-20 | 成都府天高温材料科技有限公司 | Forsterite tundish slag blocking wall castable and preparation process thereof |
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