CN107617732B - A kind of refractory material liner body and preparation method thereof for ladle - Google Patents
A kind of refractory material liner body and preparation method thereof for ladle Download PDFInfo
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- CN107617732B CN107617732B CN201710834930.0A CN201710834930A CN107617732B CN 107617732 B CN107617732 B CN 107617732B CN 201710834930 A CN201710834930 A CN 201710834930A CN 107617732 B CN107617732 B CN 107617732B
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Abstract
The refractory material liner body and preparation method thereof that the invention discloses a kind of for ladle, the refractory material liner body include working lining and permanent liner, and working lining is located on the inside of permanent liner, and the working lining uses heavy calcium hexaluminate material, are used for high temperature resistant；Heavy or lightweight calcium hexaluminate material in the permanent liner use, are used to keep the temperature and heat-insulated.The working lining and permanent liner can be made of the method for cast-in-site, prefabricated component or refractory brick.It provided by the present invention for the refractory material liner body of ladle, is able to solve ladle lining and is mingled with and influences problem to molten steel, will not be mingled in use to molten steel introducing is any, while can capture in steel and be mingled with, purify molten steel quality.
Description
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of for the refractory material liner body of ladle and its preparation
Method.
Background technique
Ladle is very important Thermal Equipment during Ferrous Metallurgy, mainly plays access, transport, refining and casting steel
The effect of water.Due to the special working environment of ladle, need to carry out the design of refractory material liner body to ladle.Ladle lining lining
Body is generally divided into three working lining, safety liner and heat preservation lining parts.Working lining generally resists slag and molten steel aggressivity is preferable
Aluminium-magnesia carbon brick, magnesia carbon brick and corundum-spinel castable (prefabricated component), corundum alumina-magnesia castable (prefabricated component) etc..Peace
Full lining generallys use clay brick, the common Low Cement Castable of middle heavy, the magnalium heavy castable of middle heavy and mullite
Brick and castable etc., kind is more.Heat preservation lining, be in early days light weight fireclay brick, light weeight alumina brick, presently mainly fiberboard, receive
Rice plate etc..
The three-decker design of current ladle lining liner body, mainly due to two kinds of purposes: first, it is logical to reduce molten steel
The radiation loss of cylinder refractory material is crossed, insulating is set；Secondly, it is ensured that ladle using safe, be provided with safety liner,
Namely permanent liner.However, that due to the promotion of the function of ladle smelting in recent years and the harshness of use condition, still
There are some bleed-out accidents, this influence to steel mill is very serious.
For now, in terms of ladle structure and material the main problems are as follows:
One, for steel quality influence, magnalium carbon turns, not only into molten steel, carburetting, formation are mingled with magnesia carbon brick, simultaneously
Also lead to molten steel heat loss etc..And corundum-spinel castable, alumina-magnesia castable of corundum system etc., although will not be to molten steel
Middle carburetting, but can be formed and be mingled with into steel.Therefore, it for working lining, reduces molten steel and is mingled with while playing purification
The functional refractory material of molten steel effect will be very important developing direction, and solve current ladle working lining material most
For effective mode.
Two, in light heat-insulating material, especially nano-plates and fiberboard, although heat-proof quality is preferable, temperature is slightly higher
Crystallization, strength reduction or dusting etc. will occur a bit, structure is caused to destroy, thus drop the support force of working lining and safety liner
It is low, lead to red packet or bleed-out, this is also to occur most one of the factor of accident in current steel mill.
Three, the safety of heavy permanent liner (safety liner) material is relatively preferable, can resist invading for high-temperature slag and molten steel
Erosion, it is ensured that the safety of ladle, but thermal conductivity is relatively high, heat leakage is larger；And middle heavy material, although heat preservation and insulation
Preferably, but in working lining damage, the erosion of high-temperature slag can not be resisted, it is easy to lead to the accidents such as bleed-out.As a result,
The permanent liner for having both high security and heat-proof quality just becomes the important development direction of ladle lining liner body.
Calcium hexaluminate is CaO-Al2O3Al in system2O3The highest aluminic acid calcium phase of content, theoretical density 3.79g/cm3, melt
Point is higher than 1875 DEG C, and thermal expansion coefficient is 8.0 × 10-6℃-1；Stability in reducing atmosphere (CO) is high；In alkaline environment
Chemical stability it is good；It is low to the wetability of molten metal and slag (steel and non-ferrous metal)；Its thermal expansion coefficient with
Al2O3It is close, it can be used cooperatively in any proportion with aluminium oxide.
Calcium hexaluminate is to have lamellar structure with magnetoplumbite type material；Thermal conductivity between lamellar structure is very low, this
It is also the most important feature and advantage of calcium hexaluminate material, although consistency with higher, thermal conductivity are very low；It is this
Performance is very important the safety and heat-proof quality of ladle.
Lamellar structure assigns the extraordinary thermal and insulating performance of calcium hexaluminate material, but calcium hexaluminate material is also caused to be difficult
Sintering, therefore it is difficult to prepare bulk density higher than 2.8g/cm3Above calcium hexaluminate material.Also therefore, at present about six
The patent of calcium aluminate be mostly using the lighter calcium hexaluminate of bulk density, such as it is Patent No. CN 101928135, entitled
The patent of invention of " a kind of calcium hexaluminate lightweight refractory brick and preparation method thereof ", Patent No. CN104086192, entitled " one
Patent of invention and Patent No. CN103496993, entitled " one kind high-strength six of kind light thermal-insulation calcium hexaluminate castable "
The patent of invention etc. of calcium aluminate light heat-insulating material and preparation method thereof ".
Summary of the invention
In order to solve the above-mentioned technical problem, realize that the comprehensive of ladle lining liner body performance is promoted, the invention proposes
A kind of ladle lining liner body and preparation method thereof based on calcium hexaluminate material, is able to ascend ladle working lining and permanent liner
Performance, and be designed to a kind of double-layer structure of ladle liner body, simplify form of construction work, reduce workload, while also solving
The key technology of current ladle lining liner body restricts.
For this purpose, the present invention provides following technical schemes:
A kind of refractory material liner body for ladle, including working lining and permanent liner, working lining are located on the inside of permanent liner, institute
Working lining is stated using heavy calcium hexaluminate material, is used for high temperature resistant；Heavy or lightweight calcium hexaluminate material in the permanent liner use
Material is used to keep the temperature and heat-insulated.
Further, the working lining and the principal crystalline phase of permanent liner are CaAl12O19, and CaAl12O19Mineral facies are greater than
50%.
Further, the CaAl12O19Main chemical compositions be Al2O391.0%~93.0%, CaO6.5%~
8.5%, remaining ingredient is less than or equal to 1.5%, and above-mentioned percentage is mass percent；CaAl12O19The content of mineral facies be greater than etc.
In 80%.
The working lining and the raw material of permanent liner can also be added other than calcium hexaluminate as a preferred method,
One or more of corundum, spinelle, fine aluminium acid salt cement etc..
Further, the chemical component of the work lining material are as follows: Al2O385%~94.5%, MgO0%~6%,
CaO5.0%~9.0%, remaining ingredient are less than or equal to 2%, and above-mentioned percentage is mass percent；Bulk density is more than or equal to
2.7g/cm3。
Further, the chemical component of the permanent lining material are as follows: Al2O385%~94.5%, MgO0%~6%,
CaO5.0%~9.0%, remaining ingredient are less than or equal to 2%, and above-mentioned percentage is mass percent；Bulk density is 1.5-
3.0g/cm3。
The present invention also provides a kind of preparation method of refractory material liner body for ladle, the working lining and permanent liner
It can be made of the method for cast-in-site, prefabricated component or refractory brick.
Further, when carrying out cast-in-site, required raw material are mixed according to designed ratio, and is equipped with
A certain proportion of water and water-reducing agent, stir evenly, vibration moulding, in the at a temperature of heat preservation 12 hours or more of setting, can be prepared by
Required refractory material liner body.
When further, using the method for prefabricated component, required raw material are mixed according to designed ratio in advance
It closes, and adds suitable water and dispersing agent etc., stir evenly, be put into prefabricated component model, can be prepared by after dry required resistance to
Fiery material liner body.
When further, using the method for refractory brick, the calcium hexaluminate raw material 100% that variable grain is matched is additional suitable
Bonding agent is measured, compression moulding is fired through 1450-1650 DEG C of high temperature.
About the double-layer structure of the ladle lining liner body proposed by the present invention based on calcium hexaluminate material, working
Lining aspect, the present invention propose to solve the problems, such as ladle lining being mingled with and influences on molten steel, reality based on calcium hexaluminate material
Functionalization of the existing ladle material to purification of molten steel.
Calcium hexaluminate material is but very stable although containing CaO component, not aquation.In use, by calcium hexaluminate
Structure change when with slag contacts forms the CA of compactness2/ CA structure sheaf inhibition slag continues infiltration and erosion, together
When by calcium hexaluminate to form C with reacting for slag12A7Deng capturing and be mingled in steel, purify molten steel quality.
Simultaneously as being free of SiO in the material2、Fe2O3Etc. components, SiO will not occur2+[Al]→[Si]+Al2O3With
Fe2O3+[Al]→[Fe]+Al2O3Deng reaction, therefore, which will not introduce any be mingled with into molten steel in use.
About safety liner and heat shield liner, the present invention proposes that the high performance material based on calcium hexaluminate makes permanent liner, substitution
Traditional safety liner and heat shield liner, while playing security performance and heat preservation and insulation.Utilize the crystal structure of calcium hexaluminate
Characteristic prepares the calcium hexaluminate material of middle heavy, for making the permanent liner of ladle, ensures the same of ladle safety realizing
When, realize heat preservation and insulation.
Since calcium hexaluminate has the erosion performance for resisting high-temperature slag and molten steel well, calcium hexaluminate material can be held
Carry on a shoulder pole security performance；And the high-temperature stability of calcium hexaluminate is fine, unlike nano-plates or fiberboard occur crystallization under high temperature and
Dusting etc. not will lead to the whole of ladle liner body structure and destroy, it can be ensured that reduces the heat leakage of ladle.
Therefore, compared with prior art, the beneficial effects of the present invention are:
(1) three layers of original liner body structure are reduced to two layers, i.e., by original by the structure for simplifying ladle lining liner body
Working lining, safety liner and the heat preservation lining come is reduced to working lining and permanent liner.
(2) working lining uses heavy calcium hexaluminate material, is used for high temperature resistant, and be able to solve ladle lining to molten steel
Be mingled with and influence problem, realize ladle material to the functionalization of purification of molten steel.
(3) permanent liner uses the high performance material based on calcium hexaluminate, substitutes traditional safety liner and heat shield liner, Neng Goutong
Shi Fahui security performance and heat preservation and insulation.
(4) ladle lining liner body of the invention can capture being mingled with, purifying molten steel quality in molten steel, entirely make
With any be mingled with will not be all introduced into molten steel in the process.
(5) preparation method simple and flexible, working lining and permanent liner can be using casting and constructings, pre-formed or be made resistance to
It is prepared by the method for firebrick.
Specific embodiment
The present invention will be further described below in conjunction with the embodiments, and following embodiment is only used to explain the present invention, but simultaneously
It is not used in and limits the scope of the invention.
Embodiment 1
A kind of refractory material liner body for ladle, working lining are castable, scheme are as follows: fine and close calcium hexaluminate raw material
65%, corundum and alumina powder etc. 30%, pure calcium aluminate cement 5%, additional dispersing agent etc. is in right amount.The castable chemistry at
It is divided into: Al2O393%, CaO6.9%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than 2.8g/
cm3。
Permanent liner is castable, scheme are as follows: fine and close calcium hexaluminate raw material 95%, pure calcium aluminate cement 5%, additional dispersing agent
Deng appropriate.The chemical component of the castable are as follows: Al2O390.5%, CaO9.0%, remaining trace.Above-mentioned percentage is quality hundred
Divide ratio.Bulk density is 3.0g/cm3。
The erosion performance of resistance to molten steel of the embodiment working lining is outstanding, and the heat-proof quality of permanent liner and safety are very good,
Not only service life is high for the combination refractory material liner body, is suitable for the smelting of high purity steel, and heat loss is few, safety
It is high.
Embodiment 2
A kind of refractory material liner body for ladle, working lining are refractory brick, scheme are as follows: the densification of variable grain proportion
Calcium hexaluminate raw material 100%, additional appropriate bonding agent, compression moulding, through 1450-1650 DEG C of high temperature firing.The change of the refractory brick
It studies and is divided into: Al2O391.5%, CaO7.8%, remaining trace.Above-mentioned percentage is mass percent.Bulk density be greater than etc.
In 2.7g/cm3。
Permanent liner is castable, scheme are as follows: fine and close calcium hexaluminate raw material 65%, magnesium-aluminum spinel raw material 10%, corundum and
Reactive alumina etc. 22%, pure calcium aluminate cement 3%, additional dispersing agent etc. are appropriate.The chemical component of the castable are as follows:
Al2O390.6%%, CaO6.3%, MgO3%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than
2.8g/cm3。
The erosion performance of resistance to molten steel of the embodiment working lining is outstanding, and the heat-proof quality of permanent liner and safety are very good,
Not only service life is high for the combination refractory material liner body, is suitable for the smelting of high purity steel, and heat loss is few, safety
It is high.
Embodiment 3
A kind of refractory material liner body for ladle, working lining are prefabricated component, scheme are as follows: fine and close calcium hexaluminate raw material
75%, magnesium-aluminum spinel raw material 20%, fine aluminium acid salt cement 5%, appropriate dispersing agent.The chemical component of the prefabricated component are as follows:
Al2O386.2%, CaO7.7%, MgO6.0%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than
2.7g/cm3。
Permanent liner is refractory brick, scheme are as follows: the fine and close calcium hexaluminate raw material 100% of variable grain proportion, additional appropriate knot
Mixture, compression moulding, through 1450-1650 DEG C of high temperature firing.The chemical component of the refractory brick are as follows: Al2O391.5%, CaO7.8%,
Remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than 2.7g/cm3。
The erosion performance of resistance to molten steel of the embodiment working lining is outstanding, and the heat-proof quality of permanent liner and safety are very good,
Not only service life is high for the combination refractory material liner body, is suitable for the smelting of high purity steel, and heat loss is few, safety
It is high.
Embodiment 4
A kind of refractory material liner body for ladle, working lining are castable, scheme are as follows: fine and close calcium hexaluminate raw material
65%, magnesium-aluminum spinel raw material 10%, corundum and Reactive alumina etc. 22%, pure calcium aluminate cement 3%, additional dispersing agent
Deng appropriate.The chemical component of the castable are as follows: Al2O390.6%, CaO6.3%, MgO3%, remaining trace.Above-mentioned percentage is equal
For mass percent.Bulk density is greater than 2.7g/cm3。
Permanent liner is prefabricated component, scheme are as follows: fine and close calcium hexaluminate raw material 75%, magnesium-aluminum spinel raw material 20%, fine aluminium acid
Salt cement 5%, appropriate dispersing agent.The chemical component of the prefabricated component are as follows: Al2O386.2%, CaO7.7%, MgO6.0%, trace
Amount.Above-mentioned percentage is mass percent.Bulk density is greater than 2.7g/cm3。
The erosion performance of resistance to molten steel of the embodiment working lining is outstanding, and the heat-proof quality of permanent liner and safety are very good,
Not only service life is high for the combination refractory material liner body, is suitable for the smelting of high purity steel, and heat loss is few, safety
It is high.
Embodiment 5
A kind of refractory material liner body for ladle, working lining are prefabricated component, scheme are as follows: fine and close calcium hexaluminate raw material
82%, corundum and Reactive alumina etc. 13%, pure calcium aluminate cement 5%, additional dispersing agent etc. is in right amount.The change of the prefabricated component
It studies and is divided into: Al2O391.6%, CaO8.3%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than
2.7g/cm3。
Permanent liner is castable, scheme are as follows: fine and close calcium hexaluminate raw material 70%, corundum and Reactive alumina etc.
28%, pure calcium aluminate cement 2%, additional dispersing agent etc. is in right amount.The chemical component of the castable are as follows: Al2O393.5%,
CaO6.4%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than 2.7g/cm3。
The erosion performance of resistance to molten steel of the embodiment working lining is outstanding, and the heat-proof quality of permanent liner and safety are very good,
Not only service life is high for the combination refractory material liner body, is suitable for the smelting of high purity steel, and heat loss is few, safety
It is high.
Embodiment 6
A kind of refractory material liner body for ladle, working lining are castable, scheme are as follows: fine and close calcium hexaluminate raw material
95%, pure calcium aluminate cement 5%, additional dispersing agent etc. is in right amount.The chemical component of the castable are as follows: Al2O390.5%,
CaO9.4%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than 2.7g/cm3。
Permanent liner is lightweight thermal insulation brick, scheme are as follows: the lightweight calcium hexaluminate raw material 100% of variable grain proportion, it is additional suitable
Measure bonding agent, compression moulding, through 1450-1650 DEG C of high temperature firing.The chemical component of the insulating brick are as follows: Al2O391.5%,
CaO7.8%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is 1.5g/cm3。
The erosion performance of resistance to molten steel of the embodiment working lining is outstanding, and the heat-proof quality of permanent liner and safety are very good,
Not only service life is high for the combination refractory material liner body, is suitable for the smelting of high purity steel, and heat loss is few, safety
It is high.
Embodiment 7
A kind of refractory material liner body for ladle, working lining are castable, scheme are as follows: fine and close calcium hexaluminate raw material
70%, corundum and Reactive alumina etc. 28%, pure calcium aluminate cement 2%, additional dispersing agent etc. is in right amount.The change of the castable
It studies and is divided into: Al2O393.5%, CaO6.4%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than
2.7g/cm3。
Permanent liner is middle heavy insulating brick, scheme are as follows: the lightweight of variable grain proportion, heavy calcium hexaluminate raw material 100%,
Additional appropriate bonding agent, compression moulding, through 1450-1650 DEG C of high temperature firing.The chemical component of the insulating brick are as follows:
Al2O391.5%, CaO7.8%, remaining trace.Above-mentioned percentage is mass percent.Bulk density is greater than 2.3g/cm3。
The erosion performance of resistance to molten steel of the embodiment working lining is outstanding, and the heat-proof quality of permanent liner and safety are very good,
Not only service life is high for the combination refractory material liner body, is suitable for the smelting of high purity steel, and heat loss is few, safety
It is high.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to restrict the invention, all in essence of the invention
Made any modification, equivalent replacement and improvement etc., should be included in protection scope of the present invention within mind and spirit
Within.
Claims (9)
1. a kind of refractory material liner body for ladle, including working lining and permanent liner, working lining is located on the inside of permanent liner, special
Sign is: the working lining uses heavy calcium hexaluminate material, is used for high temperature resistant；Heavy or lightweight six in the permanent liner use
Calcium aluminate material is used to keep the temperature and heat-insulated；The working lining and the principal crystalline phase of permanent liner are CaAl12O19, and CaAl12O19Mine
Object is mutually greater than 50%；The CaAl12O19Main chemical compositions are as follows: Al2O391.0% ~ 93.0%, CaO6.5% ~ 8.5%, remaining at
Divide and be less than or equal to 1.5%, above-mentioned percentage is mass percent；Working lining bulk density is more than or equal to 2.7g/cm3。
2. a kind of refractory material liner body for ladle according to claim 1, it is characterised in that: CaAl12O19Mineral facies
Content be more than or equal to 80%.
3. a kind of refractory material liner body for ladle according to claim 1 or 2, it is characterised in that: the working lining
Raw material with permanent liner is additionally added one of corundum, spinelle, fine aluminium acid salt cement etc. or several other than calcium hexaluminate
Kind.
4. a kind of refractory material liner body for ladle according to claim 3, it is characterised in that: the work lining material
Chemical component are as follows: Al2O385% ~ 94.5%, the % of MgO0% ~ 6%, CaO5.0% ~ 9.0, remaining ingredient are less than or equal to 2%, above-mentioned percentage
Than for mass percent；Bulk density is more than or equal to 2.7g/cm3。
5. a kind of refractory material liner body for ladle according to claim 3, it is characterised in that: the permanent lining material
Chemical component are as follows: Al2O385% ~ 94.5%, the % of MgO0% ~ 6%, CaO5.0% ~ 9.0, remaining ingredient are less than or equal to 2%, above-mentioned percentage
Than for mass percent；Bulk density is 1.5 ~ 3.0g/cm3。
6. a kind of preparation method of such as refractory material liner body described in any one of claim 1 to 5 for ladle, feature exist
It is made in: the working lining and permanent liner of the method for cast-in-site, prefabricated component or refractory brick.
7. a kind of preparation method of refractory material liner body for ladle according to claim 6, it is characterised in that: carry out
When cast-in-site, required raw material are mixed according to designed ratio, and be equipped with a certain proportion of water and water-reducing agent,
It stirs evenly, vibration moulding, in the at a temperature of heat preservation 12 hours or more of setting, can be prepared by required refractory material liner body.
8. a kind of preparation method of refractory material liner body for ladle according to claim 6, it is characterised in that: use
When the method for prefabricated component, required raw material are mixed in advance according to designed ratio, and adds suitable water and divide
Powder etc., stirs evenly, and is put into prefabricated component model, can be prepared by required refractory material liner body after dry.
9. a kind of preparation method of refractory material liner body for ladle according to claim 6, it is characterised in that: use
When the method for refractory brick, the calcium hexaluminate raw material 100% that variable grain is matched, additional appropriate bonding agent, compression moulding, warp
1450-1650 DEG C of high temperature is fired.
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| CN110041087B (en) * | 2019-05-16 | 2022-09-20 | 鞍山市和丰耐火材料有限公司 | Chromium-free brick for vacuum treatment of silicon steel and production method thereof |
| CN110156462A (en) * | 2019-05-31 | 2019-08-23 | 鞍山市和丰耐火材料有限公司 | The smelting stainless steel submersed nozzle and its production method of resistant to corrosion long-life |
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| DE19936292C2 (en) * | 1999-08-02 | 2001-09-27 | Refratechnik Holding Gmbh & Co | Refractory molded body and refractory batch and method for producing the batch and a molded body for metallurgical processes |
| EP2066597A4 (en) * | 2006-09-21 | 2011-07-27 | Mcgowan Kenneth A | Methods of use of calcium hexa aluminate refractory linings and/or chemical barriers in high alkali or alkaline environments |
| CN101928135A (en) * | 2010-09-01 | 2010-12-29 | 中国地质大学（北京） | Calcium hexaluminate lightweight refractory brick and preparation method thereof |
| CN102351552A (en) * | 2011-07-22 | 2012-02-15 | 武汉钢铁(集团)公司 | Compact calcium hexaluminate-magnesia alumina spinel composite refractory material |
| CN104086192B (en) * | 2014-06-24 | 2015-10-28 | 河南竹林耐材有限公司 | A kind of light thermal-insulation calcium hexaluminate mould material |
| CN104072170A (en) * | 2014-07-11 | 2014-10-01 | 北京科技大学 | Hexacalcium aluminate-magnesium aluminate spinel multiphase material and preparation method thereof |
| CN105585314B (en) * | 2015-12-22 | 2018-07-06 | 辽宁科技学院 | A kind of densification calcium hexaluminate grog refractory and preparation method thereof |
| CN205996184U (en) * | 2016-09-26 | 2017-03-08 | 武汉威林科技股份有限公司 | A kind of energy-saving ladle of low-material-consumption |
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