CN102452836A - Cement-free aluminum-magnesium castable for rapidly baking ladle - Google Patents
Cement-free aluminum-magnesium castable for rapidly baking ladle Download PDFInfo
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- CN102452836A CN102452836A CN2010105230533A CN201010523053A CN102452836A CN 102452836 A CN102452836 A CN 102452836A CN 2010105230533 A CN2010105230533 A CN 2010105230533A CN 201010523053 A CN201010523053 A CN 201010523053A CN 102452836 A CN102452836 A CN 102452836A
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Abstract
The invention discloses a cement-free aluminum-magnesium castable for rapidly baking a ladle. The castable consists of the following components in percentage by mass: 45-75 percent of corundum (granularity of 25-0.074 millimeters), 15-35 percent of fine alumina powder, 3-7 percent of magnesia powder of which the magnesite content is over 96 percent, 0.5-1.5 percent of alkaline aluminum lactate powder, 0.02-0.06 percent of metal aluminum powder, 0.1-0.3 percent of polypropylene fibers of which the melting point is lower than 200 DEG C, 0.5-1.5 percent of micro silicon dioxide powder, 0.1-0.3 percent of a water reducing agent, 5-35 percent of aluminum-magnesium spinel (granularity of 25-0.074 millimeters) and 0.5-3 percent of hydrated alumina powder. The castable disclosed by the invention has the advantages of difficulty in cracking during quick baking, superior molten steel erosion, residue erosion resistance and residue permeation resistance; and the castable does not pollute molten steel when taken as a refractory material of an inner lining of a container for accommodating the molten steel during smelting of pure steel, and has relatively long service life.
Description
Technical field
The present invention relates to a kind of refractory materials, relate in particular to a kind of non-cement magnalium matter mould material that is used for the quick baking ladle.
Background technology
The existing inner lining refractory that is used for ladle mainly contains Al2O3MgOC Bricks and mould material, for example: aluminate or alumina-magnesia castable.The day for announcing is that the Chinese invention patent CN1337376A on February 27th, 2002 discloses a kind of steel ladle casting material, and weight proportion is: fused white corundum 75-95%, electrosmelted magnesite clinker 5-15%, chrome green 1-5%, Si0
21%, pure calcium aluminate cement 1%.The day for announcing is that the Chinese invention patent CN1640590A on July 20th, 2005 discloses a kind of ladle magnalium matter---fine and close fused corundom mould material; Form by A, B, C three parts; Wherein the weight percent of each component is that 100 weight %: A partly is the uniform mixture of following each component in the mould material gross weight: fine and close fused corundom, and wherein granularity 25mm-10mm accounts for 20%, and granularity 10mm-5mm accounts for 17%; Granularity 5mm-3mm accounts for 15%; Granularity 3mm-0 accounts for 20%, and < 0.088mm accounts for 10% to fine and close fused corundom, and magnesia 0-0.2mm accounts for 5.2%; B partly be composite additive account for the mould material gross weight 12%; C partly is that the setting accelerator luminite cement accounts for 0.8%.
When smelting Clean Steel, carbonaceous material such as Al2O3MgOC Bricks contain higher carbon, cause molten steel recarburization, thereby pollute molten steel, thereby can not satisfy request for utilization.Existing employing cement bonded conventional aluminium spinel or the new ladle of alumina-magnesia castable are owing to exist suitable moisture in the mould material; For fear of situations such as appearance baking explosions; Need long-time baking; First storing time was generally 48 hours greater than 40 hours, caused often occurring the problem of ladle turnover difficulty; Secondly long-time baking also causes energy dissipation.
The on-the-spot maintenance of mould material is often carried out at room temperature to 1100 ° C with baking, in this process, the dehydration of mould material takes place mainly.The dehydration of mould material can be divided into free water and remove with water of constitution and remove two stages.Fs occurs in the TR of 100～200 ° of C, mainly gets rid of a large amount of free water and atmosphere planar water in the base substrate; Subordinate phase occurs in the TR of 200～1000 ° of C, mainly gets rid of water of constitution.The dehydration behavior of mould material in heat-processed is relevant with factors such as combination, amount of water, ventilation property, maintenance and temperature.Cement combines and hangs down that free water accounts for about 80% and 72% of Total Water respectively in the cement bonded mould material; Ultra-low cement combines to account for about 95% of Total Water with the mould material free water of non-cement, and cement combines and hangs down water of constitution content in the cement bonded mould material is ultra-low cement and non-cement combination mould material 4～5 times.
The baking of furnace lining has very big influence to the result of use of mould material.If it is improper to toast, heat-up rate is too fast will to cause the furnace lining crackle, peel off or explode and collapse.The mechanism of mould material baking explosion: because too fast refractory materials interior free water and the water of constitution of causing that heat up becomes gaseous state by liquid state at short notice; And along with the rising of liner temperatures; Form certain vp, when the water vapour of liner can not in time spread, increase that will build-up of pressure; When the water vapour pressure overbalance of liner, will take place that mould material is peeled off, the phenomenon of decortication even explosion.
In order to prevent mould material baking explosion, add detonation suppressor usually, detonation suppressor commonly used includes organic fiber, metallic aluminium powder etc.The explosion-proof mechanism of organic fibre is: along with storing temperature constantly raises; And organic fibre begins to soften, shrinks, melts when reaching certain temperature; Form pore and carbonization at last, in the construction body, be scattered in small long and narrow network pore, and can open the aqueous vapor passage; Alleviate internal stress, prevent explosion.The explosion-proof mechanism of metallic aluminium powder is: the aluminium powder generation hydrogen that just can react with the water in the mould material at normal temperatures, along with temperature improves, speed of response is accelerated, and forms small pore, alleviates internal stress, prevents explosion.
Summary of the invention
The object of the present invention is to provide a kind of non-cement magnalium matter mould material that is used for the quick baking ladle, this mould material has quick baking and is difficult for explosion, and splendid anti-molten steel corrodes, and slag corrosion resistance and slag penetration resistance can; When smelting Clean Steel, do not pollute molten steel when containing the steel in water container inner lining fireproof material, and work-ing life is longer.
To achieve these goals, the present invention adopts following technical scheme:
A kind of non-cement magnalium matter mould material that is used for the quick baking ladle, form by following compositions in weight percentage:
Corundum, granularity are 25～0.074mm, 45～75%;
Aluminum oxide fine powder 15～35%;
Content of magnesia is greater than 96% magnesia powder 3～7%;
Alkali formula lactic acid aluminium powder adds 0.5～1.5%;
Metallic aluminium powder adds, and 0.02～0.06%;
Fusing point is lower than the polypropylene fibre of 200 ° of C, adds 0.1～0.3%;
Fine silica powder 0.5～1.5%;
Water reducer adds, and 0.1～0.3%.
Said component also comprises aluminum-spinel, and granularity is 25～0.074mm, 5～35%.
Said component also comprises alumina hydrate powder 0.5～3%.
Mould material of the present invention need add water in construction process be 4%～5%.
Water reducer described in the present invention is meant under unshape refractory proportioning permanence condition, can reduce the mixing water amount, improve unshape refractory intensity.Can select water reducer general in the industry such as tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 etc. for use, special, be selected from the organic polymer dispersion agent, like the polycarboxylic ethers polymeric superplasticizer FS20 or the FW20 of German BASF Construction Polymers GmbH production.
Described corundum can be a kind of or its mixture in brown corundum, sub-white corundum, white fused alumina and the alundum.
The non-cement magnalium matter mould material that is used for the quick baking ladle of the present invention mainly is made up of aggregate and matrix.Aggregate adopts the corundum of granularity at 0.074mm～25mm; Matrix adopts aluminum oxide fine powder (granularity is less than 0.074mm), content of magnesia greater than 96% magnesia powder (granularity is less than 0.083mm).In the high temperature use, aluminum oxide fine powder and content of magnesia form tiny in a large number, active aluminum-spinel greater than 96% magnesia powder reaction, and tiny, active aluminum-spinel material has alkali-resistivity scouring and the strong characteristics of penetrating power.Because mould material of the present invention do not contain cement, the contained water of constitution of mould material is few, and contained free water can (200 ° of C) in time remove through gas passage that the several anti detonator forms under lower storing temperature.
Also be added into fine silica powder, detonation suppressor, water reducer among the present invention.
Fine silica powder in the present invention mainly effect be with matrix in magnesia powder and water form MgO-SiO
2-H
2O combines, and low temperature intensity in the mould material is provided, and reduces mould material simultaneously and burns the permanent line variation in back.
It is to prevent that mould material from the quick baking process explosion taking place that detonation suppressor mainly acts in the present invention, and wherein alkali formula lactic acid aluminium powder, metallic aluminium powder and polypropylene fibre are detonation suppressor.The explosion-proof mechanism of Aluctyl is: be accompanied by the gelation of aluminium behind the adding refractory castable, the ventilation rate of mould material is improved.
It is the amount of water that reduces mould material that water reducer mainly acts in the present invention, improves the density and the intensity of mould material.
In the present invention, aggregate can also select to add the aluminum-spinel of granularity at 0.074mm～25mm, and matrix also can select to add alumina hydrate powder.It is that chemicalstability is good that aluminum-spinel mainly acts in the present invention, the good and good penetrability of resistance to slag corrosion.Alumina hydrate powder main effect in the present invention is the intensity that improves mould material.
The non-cement magnalium matter mould material that is used for the quick baking ladle of the present invention can adopt conventional preparation method to prepare, for example take by weighing said various component and water in proportion after, form through the pressure uniform preparation of mixing.
The non-cement magnalium matter mould material that is used for the quick baking ladle of the present invention is compared with the Al2O3MgOC Bricks that contains of the prior art, and mould material of the present invention in use has the advantage of not polluting molten steel and long service life.Compare with the aluminate mould material with the common alumina-magnesia castable of cement bonded of the prior art, can satisfy the requirement of 30 hours quick bakings, overcome the aluminate of present use or the deficiency that can not realize quick baking that alumina-magnesia castable exists.
Therefore; Anti-molten steel aggressiveness, resistance to slag corrosion and the slag penetration resistance of the non-cement magnalium matter mould material that is used for the quick baking ladle of the present invention are splendid; When smelting Clean Steel, have with material and do not pollute molten steel as ladle liner, and work-ing life long characteristics.
Embodiment
Below in conjunction with specific embodiment the present invention is described further.
Related various components in the embodiment of the invention are starting material commonly used, can in industrial chemicals market, conveniently buy.Wherein said corundum is brown corundum, steps Aluminum ltd available from Kaifeng TeNai Co., Ltd or Qingdao peace, and alumina content is greater than 94%.Described aluminum-spinel steps Aluminum ltd available from Kaifeng TeNai Co., Ltd or Qingdao peace, and content of magnesia is greater than 8%, and Natural manganese dioxide and aluminum oxide resultant are greater than 97%.Described alumina hydrate powder steps Aluminum ltd available from the Qingdao peace.
Embodiment 1～6
Press the described component concentration of table 1, take by weighing each raw material successively, put into stirrer and force to mix evenly, can prepare the mould material that is used for ladle of the present invention.Said mould material need add water in construction process be 4%～5%.
Table 1: each weight percentages of components (%) that is used for the mould material of ladle
With the mould material that is used for ladle of the present invention that embodiment 1～6 is obtained, under 1550 ° of C temperature, calcine after 3 hours, it to be carried out performance index detect, concrete data are seen table 2.
Table 2: the 1550 ° of C of mould material that are used for ladle calcine the performance perameter table after burning in 3 hours
Can know that by table 2 data present embodiment is through under 1550 ° of C temperature, calcine that mould material has micro-expansibility after 3 hours, guarantee that mould material in use keeps the globality of cylinder-packing, has good anti-molten steel and resistance to slag corrosion simultaneously.
The mould material that is used for the quick baking ladle that present embodiment 6 is obtained; 300 tons of ladles through in certain enterprise use, and storing time is 30 hours, not explosion of bake process; Average packet reaches 160 times age, and the alumina-magnesia castable ladle that toasts (56 hours) with needs for a long time is suitable work-ing life.
This shows that the mould material that is used for the quick baking ladle of the present invention has significantly shortened storing time, do not reduce work-ing life, therefore improved the ladle turnover rate, practiced thrift fuel.
More than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, therefore, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. non-cement magnalium matter mould material that is used for the quick baking ladle is characterized in that: be made up of following compositions in weight percentage:
Corundum, granularity are 25～0.074mm, 45～75%;
Aluminum oxide fine powder 15～35%;
Content of magnesia is greater than 96% magnesia powder 3～7%;
Alkali formula lactic acid aluminium powder adds 0.5～1.5%;
Metallic aluminium powder adds, and 0.02～0.06%;
Fusing point is lower than the polypropylene fibre of 200 ° of C, adds 0.1～0.3%;
Fine silica powder 0.5～1.5%;
Water reducer adds, and 0.1～0.3%.
2. the non-cement magnalium matter mould material that is used for the quick baking ladle as claimed in claim 1, it is characterized in that: said component also comprises aluminum-spinel, granularity is 25～0.074mm, 5～35%.
3. according to claim 1 or claim 2 the non-cement magnalium matter mould material that is used for the quick baking ladle, it is characterized in that: said component also comprises alumina hydrate powder 0.5～3%.
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| CN2010105230533A CN102452836A (en) | 2010-10-28 | 2010-10-28 | Cement-free aluminum-magnesium castable for rapidly baking ladle |
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| CN2010105230533A CN102452836A (en) | 2010-10-28 | 2010-10-28 | Cement-free aluminum-magnesium castable for rapidly baking ladle |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718513A (en) * | 2012-06-28 | 2012-10-10 | 洛阳利尔耐火材料有限公司 | Aluminum-magnesium refractory castable material and preparation method thereof |
| CN103044041A (en) * | 2012-12-27 | 2013-04-17 | 内蒙古包钢利尔高温材料有限公司 | Alumina-magnesia brick for refined steel ladle wall |
| CN103086728A (en) * | 2013-01-01 | 2013-05-08 | 北京利尔高温材料股份有限公司 | Explosion proofing castable for steel ladle working layer |
| CN103100703A (en) * | 2013-01-01 | 2013-05-15 | 北京利尔高温材料股份有限公司 | Processing method for anti-explosion refractory castables used by steel ladle working layers |
| CN103121850A (en) * | 2012-07-04 | 2013-05-29 | 卫辉熔金高温材料有限责任公司 | Non-cement-bound corundum fabricated part and production method thereof |
| CN103664202A (en) * | 2012-09-25 | 2014-03-26 | 天津振普筑炉衬里工程有限公司 | High-purity compact refractory castable used in high temperature hydrogen environment |
| CN107512902A (en) * | 2017-08-24 | 2017-12-26 | 浙江科屹耐火材料有限公司 | The magnalium carbon refractory and its preparation technology that a kind of multifilament is strengthened |
| CN108083782A (en) * | 2017-11-22 | 2018-05-29 | 武汉钢铁集团耐火材料有限责任公司 | Ladle integral pouring working lining castable |
| CN108117401A (en) * | 2017-12-26 | 2018-06-05 | 河南欣昌耐材股份有限公司 | A kind of ladle permanent layer quick-drying gravity flow pouring material |
| CN108892486A (en) * | 2018-08-23 | 2018-11-27 | 安徽瑞泰新材料科技有限公司 | A kind of anti-explosion refractory castable |
| CN112851378A (en) * | 2021-01-23 | 2021-05-28 | 江苏锦耐新材料科技有限公司 | Carbon-free brick for steel ladle and processing method thereof |
| CN113943167A (en) * | 2021-12-02 | 2022-01-18 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
| CN114031377A (en) * | 2021-09-26 | 2022-02-11 | 武汉如星科技有限公司 | Cement-free combined gunning mix for carbon-free steel ladle and preparation method thereof |
| CN116063085A (en) * | 2022-12-19 | 2023-05-05 | 苏州大学 | In-situ spinel Dan Gangbao brick for high-cleanness steel smelting and preparation method thereof |
| CN116199504A (en) * | 2023-03-17 | 2023-06-02 | 中铸新材工业（江苏）有限公司 | Refractory castable capable of being baked quickly and preparation method thereof |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718513A (en) * | 2012-06-28 | 2012-10-10 | 洛阳利尔耐火材料有限公司 | Aluminum-magnesium refractory castable material and preparation method thereof |
| CN103121850A (en) * | 2012-07-04 | 2013-05-29 | 卫辉熔金高温材料有限责任公司 | Non-cement-bound corundum fabricated part and production method thereof |
| CN103121850B (en) * | 2012-07-04 | 2015-04-15 | 河南熔金高温材料股份有限公司 | Non-cement-bound corundum fabricated part and production method thereof |
| CN103664202A (en) * | 2012-09-25 | 2014-03-26 | 天津振普筑炉衬里工程有限公司 | High-purity compact refractory castable used in high temperature hydrogen environment |
| CN103044041A (en) * | 2012-12-27 | 2013-04-17 | 内蒙古包钢利尔高温材料有限公司 | Alumina-magnesia brick for refined steel ladle wall |
| CN103086728A (en) * | 2013-01-01 | 2013-05-08 | 北京利尔高温材料股份有限公司 | Explosion proofing castable for steel ladle working layer |
| CN103100703A (en) * | 2013-01-01 | 2013-05-15 | 北京利尔高温材料股份有限公司 | Processing method for anti-explosion refractory castables used by steel ladle working layers |
| CN103086728B (en) * | 2013-01-01 | 2014-12-24 | 北京利尔高温材料股份有限公司 | Explosion proofing castable for steel ladle working layer |
| CN107512902B (en) * | 2017-08-24 | 2020-10-02 | 马长江 | Multi-fiber reinforced magnesium-aluminum-carbon refractory material and preparation process thereof |
| CN107512902A (en) * | 2017-08-24 | 2017-12-26 | 浙江科屹耐火材料有限公司 | The magnalium carbon refractory and its preparation technology that a kind of multifilament is strengthened |
| CN108083782A (en) * | 2017-11-22 | 2018-05-29 | 武汉钢铁集团耐火材料有限责任公司 | Ladle integral pouring working lining castable |
| CN108117401A (en) * | 2017-12-26 | 2018-06-05 | 河南欣昌耐材股份有限公司 | A kind of ladle permanent layer quick-drying gravity flow pouring material |
| CN108117401B (en) * | 2017-12-26 | 2020-09-29 | 河南欣昌耐材股份有限公司 | Quick-drying self-flow castable for permanent layer of ladle |
| CN108892486A (en) * | 2018-08-23 | 2018-11-27 | 安徽瑞泰新材料科技有限公司 | A kind of anti-explosion refractory castable |
| CN108892486B (en) * | 2018-08-23 | 2021-06-04 | 安徽瑞泰新材料科技有限公司 | Explosion-proof castable |
| CN112851378A (en) * | 2021-01-23 | 2021-05-28 | 江苏锦耐新材料科技有限公司 | Carbon-free brick for steel ladle and processing method thereof |
| CN114031377A (en) * | 2021-09-26 | 2022-02-11 | 武汉如星科技有限公司 | Cement-free combined gunning mix for carbon-free steel ladle and preparation method thereof |
| CN113943167A (en) * | 2021-12-02 | 2022-01-18 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
| CN113943167B (en) * | 2021-12-02 | 2022-12-27 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
| CN116063085A (en) * | 2022-12-19 | 2023-05-05 | 苏州大学 | In-situ spinel Dan Gangbao brick for high-cleanness steel smelting and preparation method thereof |
| CN116199504A (en) * | 2023-03-17 | 2023-06-02 | 中铸新材工业（江苏）有限公司 | Refractory castable capable of being baked quickly and preparation method thereof |
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Application publication date: 20120516 |