CN109095897A - A kind of calcareous backpack cover castable of tundish magnesium and preparation method thereof - Google Patents
A kind of calcareous backpack cover castable of tundish magnesium and preparation method thereof Download PDFInfo
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- CN109095897A CN109095897A CN201811071971.XA CN201811071971A CN109095897A CN 109095897 A CN109095897 A CN 109095897A CN 201811071971 A CN201811071971 A CN 201811071971A CN 109095897 A CN109095897 A CN 109095897A
- Authority
- CN
- China
- Prior art keywords
- magnesium
- tundish
- calcareous
- calcium
- backpack cover
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 39
- 239000011777 magnesium Substances 0.000 title claims abstract description 39
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 139
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 78
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000002245 particle Substances 0.000 claims abstract description 63
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000011575 calcium Substances 0.000 claims abstract description 46
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 38
- 239000000292 calcium oxide Substances 0.000 claims abstract description 36
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 36
- 239000003595 mist Substances 0.000 claims abstract description 35
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 21
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 21
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 21
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 21
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 150000002901 organomagnesium compounds Chemical class 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 3
- 229960005069 calcium Drugs 0.000 claims description 44
- 239000000203 mixture Substances 0.000 claims description 39
- 238000002156 mixing Methods 0.000 claims description 12
- 239000008187 granular material Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- XBXAHYGPIWPTIF-UHFFFAOYSA-N CC=1C(C=CC=1)([Mg])C Chemical compound CC=1C(C=CC=1)([Mg])C XBXAHYGPIWPTIF-UHFFFAOYSA-N 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 229920000388 Polyphosphate Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 229920002125 Sokalan® Polymers 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 5
- 150000001336 alkenes Chemical class 0.000 claims description 5
- 125000002619 bicyclic group Chemical group 0.000 claims description 5
- 239000004227 calcium gluconate Substances 0.000 claims description 5
- 229960004494 calcium gluconate Drugs 0.000 claims description 5
- 235000013927 calcium gluconate Nutrition 0.000 claims description 5
- MKJXYGKVIBWPFZ-UHFFFAOYSA-L calcium lactate Chemical compound [Ca+2].CC(O)C([O-])=O.CC(O)C([O-])=O MKJXYGKVIBWPFZ-UHFFFAOYSA-L 0.000 claims description 5
- 239000001527 calcium lactate Substances 0.000 claims description 5
- 235000011086 calcium lactate Nutrition 0.000 claims description 5
- 229940041131 calcium lactate gluconate Drugs 0.000 claims description 5
- NEEHYRZPVYRGPP-UHFFFAOYSA-L calcium;2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(O)C([O-])=O.OCC(O)C(O)C(O)C(O)C([O-])=O NEEHYRZPVYRGPP-UHFFFAOYSA-L 0.000 claims description 5
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 5
- 239000004584 polyacrylic acid Substances 0.000 claims description 5
- 239000004626 polylactic acid Substances 0.000 claims description 5
- 239000001205 polyphosphate Substances 0.000 claims description 5
- 235000011176 polyphosphates Nutrition 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 244000248349 Citrus limon Species 0.000 claims 2
- 235000005979 Citrus limon Nutrition 0.000 claims 2
- 235000001465 calcium Nutrition 0.000 claims 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 19
- 239000010959 steel Substances 0.000 abstract description 19
- 239000011819 refractory material Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000009749 continuous casting Methods 0.000 abstract description 6
- 230000035939 shock Effects 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 8
- 238000004321 preservation Methods 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 4
- FNAQSUUGMSOBHW-UHFFFAOYSA-H calcium citrate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O FNAQSUUGMSOBHW-UHFFFAOYSA-H 0.000 description 4
- 239000001354 calcium citrate Substances 0.000 description 4
- 229960004256 calcium citrate Drugs 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 235000013337 tricalcium citrate Nutrition 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000002679 ablation Methods 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—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
-
- 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
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
-
- 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 or hypophosphite
-
- 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
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The present invention relates to a kind of calcareous backpack cover castables of tundish magnesium, including including following component by weight percentage: magnesia particle 20-40wt%；20~40wt%m of calcium magnesite particle；5~15wt% of quicklime particles；10~20wt% of magnesia powder；0.5~3wt% of organo-magnesium compound；1~6wt% of organic calcium；2~6wt% of thermoplasticity micro mist；2~8wt% of fine magnesium oxide micro-powder；And 0.1~0.2wt% of water-reducing agent.The invention further relates to a kind of methods for preparing the calcareous backpack cover castable of tundish magnesium.The present invention improves the thermal shock resistance of refractory material, heat loss is effectively reduced simultaneously, ensure that the good thermal insulation property of material and thermal shock resistance, apply on high-quality steel continuous casting production, tundish cover skin temperature can be made averagely to reduce by 10% or more, average life is up to 15 times or more.
Description
Technical field
The invention belongs to tundish technical field of refractory materials more particularly to one kind superior thermal shake and heat insulating ability
Energy, calcareous backpack cover castable of tundish magnesium of purification molten steel and preparation method thereof.
Background technique
In recent years, with the metallurgical function enhancing of tundish and energy-saving demand, the work of tundish cover of continuous casting tundish
With more and more prominent, the quality of behaviour in service directly influences the yield and quality of continuous casting steel.The effect major embodiment of backpack cover
Are as follows: function of heat insulation is played in baking of tundish and casting process, is improved baking of tundish efficiency and is reduced molten steel heat dissipation；Into
And protect skateboard configuration of steel water bag from the direct heat radiation damage of high-temperature molten steel；Peace also is played to live thermometric and sampling personnel simultaneously
Full protection effect etc..
There are mainly two types of forms for tundish cover of continuous casting tundish:
(1) full cast steel or full cast iron tundish cover form.Tundish cover is manufactured using full steel-casting, is generally used
It is several pour time after, cover board in addition to surface vigorous oxidation, steel bonding, just cut in this way by integrally severely deformed, warpage that more important is cover boards
The weak heat insulation effect of backpack cover, and influence the movement of stopper down operation.Using its service life of the tundish cover of full steel-casting
Shorter, not only spare parts consumption amount is big, it is often more important that affects the normal operating for pouring steel.There is steel mill to have used excessively high silicon heat-resisting
Spheroidal graphite cast-iron manufacture tundish cover is just cracked since ironcasting brittleness is big using only a back shroud, immediately entire packet
The fracture of lid cover board.Therefore the material that heat-resisting cast iron is also not suitable for making tundish cover uses.
(2) metal-castable refractory composite construction tundish cover form.Metal-castable refractory composite construction
Mainly the form of damaging has tundish cover: 1. backpack cover metal edge frame ablation；2. backpack cover middle bent deforms；3. castable refractory covers
Cap rock peels off.Wherein, the ablation of backpack cover metal edge frame and the bending of backpack cover frame are the main forms of backpack cover breakage, and more associations go out
It is existing.The peeling of backpack cover castable refractory coating is often constantly extended using frame localized delamination as starting point, and final development is
The peeling of backpack cover large area.One coating of backpack cover castable refractory large area peeling do not only result in backpack cover thermal insulation property decline and
It influences it and keeps the temperature safeguard function, while chip off-falling also results in the blocking casting mouth of a river and influences opening for continuous casting billet and pour.
Currently, the backpack cover that CC at home & abroad tundish uses more is the structure type that steel construction adds refractory material, master
Want failure mode to have as described above: overall deformation is big, and refractory material falls off, steel construction scaling loss etc..Among large-scale flute profile
Packet, since the size of tundish is larger, tundish cover is also by the way of multistage combination.Stopper is disposed on tundish cover
Hole and burner hole, backpack cover castable refractory coating peel off serious, damage of easily sinking under high temperature environment in the middle part of backpack cover, and
Metal structure frame ablation etc. seriously constrains the raising of tundish cover service life, and average life mostly only 3-5 are poured
It is secondary.Discovery is researched and analysed, the steel construction of integral solder changes with high temperature generates moderate finite deformation, and steel construction is swollen with refractory material
The difference of swollen coefficient causes refractory material that can not be in close contact for a long time with steel construction, and refractory material is easy to crack and removes, falls off,
It causes steel construction to be burnt, it is entirely ineffective to eventually lead to backpack cover.As it can be seen that the military service thermal shock resistance difference of backpack cover refractory material is intermediate
The main reason for packet backpack cover damages, and a kind of tundish cover castable and preparation method thereof of invention early period
(ZL201410242492.5) thermal shock resistance can be preferably solved, but introduces carbon electrode and easily causes the pollution of molten steel and thermally conductive
Also relatively still high, it would be highly desirable to solve.
Summary of the invention
In consideration of it, it is an object of the invention in view of the foregoing drawbacks, and then provide a kind of with superior thermal shake and heat preservation
Performance and the long-lived metallurgical furnace cover pouring material and preparation method thereof that molten steel can be purified.
In order to reach foregoing invention purpose, the technical solution adopted is that: a kind of calcareous backpack cover castable of tundish magnesium,
Including following component by weight percentage:
Magnesia particle 20-40wt%, partial size are 0.088~10mm；
Calcium magnesite 20~40wt% of particle, partial size are 0.088~10mm；
5~15wt% of quicklime particles, partial size are 0.088~8mm；
10~20wt% of magnesia powder, partial size are less than 0.088mm；
0.5~3wt% of organo-magnesium compound, partial size are less than 0.088mm；
1~6wt% of organic calcium, partial size are less than 0.088mm；
Thermoplasticity 2~6wt% of micro mist, partial size are less than 0.045m；
2~8wt% of fine magnesium oxide micro-powder, partial size are less than 0.01mm；And
0.1~0.2wt% of water-reducing agent.
Further, the content of MgO is greater than 99wt% in the magnesia particle.
Further, the content of the CaO in the calcium magnesite particle is more than or equal to 20wt%.
Further, the content of the CaO in the quicklime particles is greater than 95wt%.
Further, the content of the MgO in the magnesia powder is greater than 99wt%.
Further, the organo-magnesium compound is the mixture of bicyclic more than penta alkene magnesium and bis-methylcyclopentadienyl magnesium.
Further, the organic calcium is one or more of calcium citrate, calcium lactate or calcium gluconate
Mixture.
Further, the thermoplasticity micro mist is one of ABS resin, polylactic acid, polypropylene or polyvinyl alcohol or two
Kind or more mixture.
Further, the content of MgO of the fine magnesium oxide micro-powder is greater than 99wt%.
Further, the water-reducing agent is one or more kinds of mixing of polycarboxylic acids, polyphosphate sodium and polyacrylic acid
Object.
The invention further relates to a kind of preparation methods of the calcareous backpack cover castable of tundish magnesium, comprising the following steps:
S1: by organo-magnesium compound, organic calcium, thermoplasticity micro mist, fine magnesium oxide micro-powder and water-reducing agent respectively according to above-mentioned
Weight proportion configured, again by organo-magnesium compound, organic calcium, thermoplasticity micro mist, magnesia after the completion of be respectively configured
It is spare that micro mist mixture is made in micro mist and water-reducing agent after mixing；
S2: by magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder respectively according to above-mentioned weight proportion
It is configured, wait again be uniformly mixed magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder after the completion of being respectively configured
After that granulate mixture is made is spare；
S3: the micro mist mixture and granulate mixture that step S1 and S2 are prepared respectively after mixing, add 4.5 again
The water of~7.5wt%, casting vibration moulding forms green body after stirring 1~3 minute；
S4: the green body of step S3 vibration moulding is conserved 8~24 hours at room temperature, then under the conditions of 110~200 DEG C
Heat preservation 12~36 hours to get the calcareous backpack cover castable of tundish magnesium
The beneficial effects of the present invention are: the present invention can be formed using the hydration swelling of calcium oxide and the plasticity of organic component
Tight structure；With the raising of baking temperature, calcium oxide and vapor reaction are stronger in quick lime, form calcium hydroxide, together
When organic component also gradually volatilize, and remain carbochain gradually form, structure still ensures its consistency and does not crack；Thereafter, have
Machine calcium and organic-magnesium can remain the vapor consumed in material stomata with larger active calcium and magnesium, and it is micro- to form calcium hydroxide
The calcium hydroxide and residual carbochain that crystalline substance further forms densifying materials and early period constitute staggered network, and improve material
Medium temperature intensity；Then aquation calcium oxide gradually decomposes, and material internal forms a large amount of micro-nano closed pores, can accommodate temperature play
Become bring thermal stress, improves the thermal shock resistance of refractory material, while heat loss is effectively reduced, ensure that material is good
Thermal insulation property and thermal shock resistance, and micro-nano stomata enables calcium oxide hole wall to absorb the aluminium oxide in a lot of steel slag gradually
Forming calcium hexaluminate and combining mutually enhances, and applies on high-quality steel continuous casting production, and tundish cover skin temperature can be made flat
10% or more is reduced, average life is up to 15 times or more.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
In order to make those skilled in the art more fully understand application scheme, below to the technology in the embodiment of the present application
Scheme is clearly and completely described, it is clear that and described embodiment is only the embodiment of the application a part, rather than
Whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present application.
Embodiment 1
A kind of calcareous backpack cover castable of tundish magnesium, including following component by weight percentage:
Magnesia particle 20wt%, partial size are 0.088~10mm；Calcium magnesite particle 20wt%, partial size are 0.088~10mm；
Quicklime particles 5wt%, partial size are 0.088~8mm；Magnesia powder 10wt%, partial size are less than 0.088mm；Organic-magnesium chemical combination
Object 0.5wt%, partial size are less than 0.088mm；Organic calcium 1wt%, partial size are less than 0.088mm；Thermoplasticity micro mist 2wt%, partial size are small
In 0.045m；Fine magnesium oxide micro-powder 2wt%, partial size are less than 0.01mm and water-reducing agent 0.1wt%.
Wherein, in the present embodiment, content of MgO is greater than 99wt% in the magnesia particle.The CaO of the calcium magnesite particle >=
20wt%.The CaO content of the quicklime particles is greater than 95wt%.The content of MgO of the magnesia powder is greater than 99wt%.It is described
Organo-magnesium compound is the mixture of bicyclic more than penta alkene magnesium and bis-methylcyclopentadienyl magnesium.The organic calcium be calcium citrate,
The mixture of one or more of calcium lactate or calcium gluconate.The thermoplasticity micro mist be ABS resin, polylactic acid,
The mixture of one or more of polypropylene or polyvinyl alcohol.The content of MgO of the fine magnesium oxide micro-powder is greater than 99wt%.
The water-reducing agent is one or more kinds of mixtures of polycarboxylic acids, polyphosphate sodium and polyacrylic acid.
The calcareous backpack cover castable of the tundish magnesium of above-described embodiment 1 the preparation method comprises the following steps:
S1: by organo-magnesium compound, organic calcium, thermoplasticity micro mist, fine magnesium oxide micro-powder and water-reducing agent respectively according to above-mentioned
Weight proportion configured, again by organo-magnesium compound, organic calcium, thermoplasticity micro mist, magnesia after the completion of be respectively configured
It is spare that micro mist mixture is made in micro mist and water-reducing agent after mixing；
S2: by magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder respectively according to above-mentioned weight proportion
It is configured, wait again be uniformly mixed magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder after the completion of being respectively configured
After that granulate mixture is made is spare；
S3: the micro mist mixture and granulate mixture that step S1 and S2 are prepared respectively after mixing, add again
The water of 4.5wt%, casting vibration moulding forms green body after stirring 1 minute；
S4: the green body of step S3 vibration moulding is conserved 8 hours at room temperature, then heat preservation 12 is small under the conditions of 110 DEG C
When to get the calcareous backpack cover castable of tundish magnesium.
Embodiment 2
A kind of calcareous backpack cover castable of tundish magnesium, including following component by weight percentage:
Magnesia particle 30wt%, partial size are 0.088~10mm；Calcium magnesite particle 30wt%, partial size are 0.088~10mm；
Quicklime particles 10wt%, partial size are 0.088~8mm；Magnesia powder 15wt%, partial size are less than 0.088mm；Organic-magnesium chemical combination
Object 2wt%, partial size are less than 0.088mm；Organic calcium 4wt%, partial size are less than 0.088mm；Thermoplasticity micro mist 4wt%, partial size are less than
0.045m；Fine magnesium oxide micro-powder 5wt%, partial size are less than 0.01mm and water-reducing agent 0.15wt%.
Wherein, in the present embodiment, content of MgO is greater than 99wt% in the magnesia particle.The CaO of the calcium magnesite particle >=
20wt%.The CaO content of the quicklime particles is greater than 95wt%.The content of MgO of the magnesia powder is greater than 99wt%.It is described
Organo-magnesium compound is the mixture of bicyclic more than penta alkene magnesium and bis-methylcyclopentadienyl magnesium.The organic calcium be calcium citrate,
The mixture of one or more of calcium lactate or calcium gluconate.The thermoplasticity micro mist be ABS resin, polylactic acid,
The mixture of one or more of polypropylene or polyvinyl alcohol.The content of MgO of the fine magnesium oxide micro-powder is greater than 99wt%.
The water-reducing agent is one or more kinds of mixtures of polycarboxylic acids, polyphosphate sodium and polyacrylic acid.
The calcareous backpack cover castable of the tundish magnesium of above-described embodiment 2 the preparation method comprises the following steps:
S1: by organo-magnesium compound, organic calcium, thermoplasticity micro mist, fine magnesium oxide micro-powder and water-reducing agent respectively according to above-mentioned
Weight proportion configured, again by organo-magnesium compound, organic calcium, thermoplasticity micro mist, magnesia after the completion of be respectively configured
It is spare that micro mist mixture is made in micro mist and water-reducing agent after mixing；
S2: by magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder respectively according to above-mentioned weight proportion
It is configured, wait again be uniformly mixed magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder after the completion of being respectively configured
After that granulate mixture is made is spare；
S3: the micro mist mixture and granulate mixture that step S1 and S2 are prepared respectively after mixing, add again
The water of 6wt%, casting vibration moulding forms green body after stirring 2 minutes；
S4: the green body of step S3 vibration moulding is conserved 16 hours at room temperature, then heat preservation 24 is small under the conditions of 155 DEG C
When to get the calcareous backpack cover castable of tundish magnesium.
Embodiment 3
A kind of calcareous backpack cover castable of tundish magnesium, including following component by weight percentage:
Magnesia particle 40wt%, partial size are 0.088~10mm；Calcium magnesite particle 40wt%, partial size are 0.088~10mm；
Quicklime particles 15wt%, partial size are 0.088~8mm；Magnesia powder 20wt%, partial size are less than 0.088mm；Organic-magnesium chemical combination
Object 3wt%, partial size are less than 0.088mm；Organic calcium 6wt%, partial size are less than 0.088mm；Thermoplasticity micro mist 6wt%, partial size are less than
0.045m；Fine magnesium oxide micro-powder 8wt%, partial size are less than 0.01mm and water-reducing agent 0.2wt%.
Wherein, in the present embodiment, content of MgO is greater than 99wt% in the magnesia particle.The CaO of the calcium magnesite particle >=
20wt%.The CaO content of the quicklime particles is greater than 95wt%.The content of MgO of the magnesia powder is greater than 99wt%.It is described
Organo-magnesium compound is the mixture of bicyclic more than penta alkene magnesium and bis-methylcyclopentadienyl magnesium.The organic calcium be calcium citrate,
The mixture of one or more of calcium lactate or calcium gluconate.The thermoplasticity micro mist be ABS resin, polylactic acid,
The mixture of one or more of polypropylene or polyvinyl alcohol.The content of MgO of the fine magnesium oxide micro-powder is greater than 99wt%.
The water-reducing agent is one or more kinds of mixtures of polycarboxylic acids, polyphosphate sodium and polyacrylic acid.
The calcareous backpack cover castable of the tundish magnesium of above-described embodiment 3 the preparation method comprises the following steps:
S1: by organo-magnesium compound, organic calcium, thermoplasticity micro mist, fine magnesium oxide micro-powder and water-reducing agent respectively according to above-mentioned
Weight proportion configured, again by organo-magnesium compound, organic calcium, thermoplasticity micro mist, magnesia after the completion of be respectively configured
It is spare that micro mist mixture is made in micro mist and water-reducing agent after mixing；
S2: by magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder respectively according to above-mentioned weight proportion
It is configured, wait again be uniformly mixed magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder after the completion of being respectively configured
After that granulate mixture is made is spare；
S3: the micro mist mixture and granulate mixture that step S1 and S2 are prepared respectively after mixing, add again
The water of 7.5wt%, casting vibration moulding forms green body after stirring 3 minutes；
S4: the green body of step S3 vibration moulding is conserved 24 hours at room temperature, then heat preservation 36 is small under the conditions of 200 DEG C
When to get the calcareous backpack cover castable of tundish magnesium.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of calcareous backpack cover castable of tundish magnesium, which is characterized in that including following component by weight percentage:
Magnesia particle 20-40wt%, partial size are 0.088~10mm；
Calcium magnesite 20~40wt% of particle, partial size are 0.088~10mm；
5~15wt% of quicklime particles, partial size are 0.088~8mm；
10~20wt% of magnesia powder, partial size are less than 0.088mm；
0.5~3wt% of organo-magnesium compound, partial size are less than 0.088mm；
1~6wt% of organic calcium, partial size are less than 0.088mm；
Thermoplasticity 2~6wt% of micro mist, partial size are less than 0.045m；
2~8wt% of fine magnesium oxide micro-powder, partial size are less than 0.01mm；And
0.1~0.2wt% of water-reducing agent.
2. the calcareous backpack cover castable of a kind of tundish magnesium according to claim 1, which is characterized in that in the magnesia particle
The content of MgO is greater than 99wt%, and the content of the MgO in the magnesia powder is greater than 99wt%.
3. the calcareous backpack cover castable of a kind of tundish magnesium according to claim 1, which is characterized in that the calcium magnesite particle
In CaO content be more than or equal to 20wt%.
4. the calcareous backpack cover castable of a kind of tundish magnesium according to claim 1, which is characterized in that the quicklime particles
In CaO content be greater than 95wt%.
5. the calcareous backpack cover castable of a kind of tundish magnesium according to claim 1, which is characterized in that the organic-magnesium chemical combination
Object is the mixture of bicyclic more than penta alkene magnesium and bis-methylcyclopentadienyl magnesium.
6. the calcareous backpack cover castable of a kind of tundish magnesium according to claim 1, which is characterized in that the organic calcium is lemon
The mixture of one or more of lemon acid calcium, calcium lactate or calcium gluconate.
7. the calcareous backpack cover castable of a kind of tundish magnesium according to claim 1, which is characterized in that the thermoplasticity micro mist
For the mixture of one or more of ABS resin, polylactic acid, polypropylene or polyvinyl alcohol.
8. the calcareous backpack cover castable of a kind of tundish magnesium according to claim 1, which is characterized in that the fine magnesium oxide micro-powder
Content of MgO be greater than 99wt%.
9. the calcareous backpack cover castable of a kind of tundish magnesium according to claim 1, which is characterized in that the water-reducing agent is poly-
One or more kinds of mixtures of carboxylic acid, polyphosphate sodium and polyacrylic acid.
10. a kind of method for preparing the calcareous backpack cover castable of tundish magnesium described in claim 1, which is characterized in that including with
Lower step:
S1: by organo-magnesium compound, organic calcium, thermoplasticity micro mist, fine magnesium oxide micro-powder and water-reducing agent respectively according to above-mentioned weight
Amount is configured, again by organo-magnesium compound, organic calcium, thermoplasticity micro mist, fine magnesium oxide micro-powder after the completion of being respectively configured
It is spare that micro mist mixture is made after mixing with water-reducing agent；
S2: magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder are carried out according to above-mentioned weight proportion respectively
Configuration, wait again make magnesia particle, calcium magnesite particle, quicklime particles and magnesia powder after mixing after the completion of being respectively configured
It is spare at granulate mixture；
S3: micro mist mixture that step S1 and S2 are prepared respectively and granulate mixture again after mixing, addition 4.5~
The water of 7.5wt%, casting vibration moulding forms green body after stirring 1~3 minute；
S4: the green body of step S3 vibration moulding is conserved 8~24 hours at room temperature, is then kept the temperature under the conditions of 110~200 DEG C
12~36 hours to get the calcareous backpack cover castable of tundish magnesium.
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| CN110183213A (en) * | 2019-05-31 | 2019-08-30 | 武汉钢铁有限公司 | A kind of dry working lining and preparation method thereof adding waste refractory materials |
| CN112851380A (en) * | 2021-02-24 | 2021-05-28 | 中国一冶集团有限公司 | Magnesium-calcium metallurgical furnace lid castable and preparation method thereof |
| CN115246733A (en) * | 2021-04-28 | 2022-10-28 | 宝山钢铁股份有限公司 | High-durability tundish coating and application thereof |
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| CN101367659A (en) * | 2008-06-20 | 2009-02-18 | 上海彭浦特种耐火材料厂 | Magnesium calcium RH varnished tube hot spray repair material for smelting silicon steel and formulating method thereof |
| CN102557689A (en) * | 2012-01-06 | 2012-07-11 | 河南科技大学 | Lightweight anorthite microporous refractory aggregate and preparation method thereof |
| CN104003741A (en) * | 2014-06-03 | 2014-08-27 | 武汉科技大学 | Tundish covering castable and preparation method thereof |
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| US3753747A (en) * | 1971-10-01 | 1973-08-21 | Gen Refractories Co | Hydration resistance for dolomite grain |
| CN101367659A (en) * | 2008-06-20 | 2009-02-18 | 上海彭浦特种耐火材料厂 | Magnesium calcium RH varnished tube hot spray repair material for smelting silicon steel and formulating method thereof |
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| CN110183213A (en) * | 2019-05-31 | 2019-08-30 | 武汉钢铁有限公司 | A kind of dry working lining and preparation method thereof adding waste refractory materials |
| CN110183213B (en) * | 2019-05-31 | 2021-04-27 | 武汉钢铁有限公司 | Tundish dry-type working lining added with waste refractory material and preparation method thereof |
| CN112851380A (en) * | 2021-02-24 | 2021-05-28 | 中国一冶集团有限公司 | Magnesium-calcium metallurgical furnace lid castable and preparation method thereof |
| CN115246733A (en) * | 2021-04-28 | 2022-10-28 | 宝山钢铁股份有限公司 | High-durability tundish coating and application thereof |
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| CN109095897B (en) | 2020-12-29 |
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