CN104987096A - Steel ladle edge refractory castable - Google Patents
Steel ladle edge refractory castable Download PDFInfo
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- CN104987096A CN104987096A CN201510424276.7A CN201510424276A CN104987096A CN 104987096 A CN104987096 A CN 104987096A CN 201510424276 A CN201510424276 A CN 201510424276A CN 104987096 A CN104987096 A CN 104987096A
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- steel ladle
- refractory castable
- ladle edge
- particle diameter
- edge refractory
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Abstract
The invention provides a steel ladle edge refractory castable which comprises the following raw materials in percentage by mass: 40-60% of flint clay aggregate, 15-25% of used magnesia carbon bricks, 15-25% of high aluminium bauxite, 1-3% of cement, 1-2% of borax glass, 2-3% of spodumene, 3-4% of kyanite, 2-3% of silicon micro-powder, 1-2% of steel fiber and 1-2% of binding agent, wherein the binding agent comprises at least one of sodium tripolyphosphate, sodium hexametaphosphate and explosion-proof fiber. According to the steel ladle edge refractory castable provided by the invention, high strength, bonded slag resistance and an excellent anti-heat shock stability property are taken into consideration, and the using quality of the steel ladle edge material is greatly improved.
Description
Technical field
The present invention relates to steel ladle edge refractory materials, be specifically related to a kind of magnesia carbon brick ladle sealing mould material, belong to metallurgy industry.
Background technology
Steelworks magnesia carbon brick ladle is normally made up of along mould material involucrum, permanent layer mould material, working lining (magnesia carbon brick) and bag, wrapping along mould material Main Function is compress ladle bottom slag line magnesia carbon brick, prevent Ladle slag line magnesia carbon brick from loosening or coming off, keep working lining globality.
Steel ladle edge mould material seldom directly contacts molten steel, it only affects by molten steel radiation heat, so use temperature is relatively low, generally between 1200-1300 DEG C, but because ladle belongs to intermittent operation mode, cause ladle to need thermal shock resistance requirement higher.In addition, slag and molten steel splash during ladle argon-blown, slag dross will be caused, although there is slag adhesion technology (the steel ladle edge slag adhesion mould material as application number a kind of agalmatolite disclosed in the Chinese patent literature of 201310572441.4) in prior art, if but ladle slag liquid thickness, or temperature drop is serious in deslagging process, still inevitable dry slag, this just needs to scrape slag.For another example application number be CN201010174726.9 patent document discloses a kind of slag adhesion resistant gunning refractory for converter; it is applicable to magnesium carbon refractory and gives up brick reworked material for Gunning System to improve slag adhesion performance; if bag does not have available protecting carbon along material high temperature; ferric oxide in steelmaking process in slag and carbon react; in simultaneous reactions product C O discharge process; define tectorium, intensity can be caused significantly to reduce, and the chemical reaction occurred in this process is as follows:
MnO+C＝Mn+CO↑ (1)
FeO+C＝Fe+CO↑ (2)
Also the higher mould material of intensity is had in currently available technology, the Chinese patent literature being 201310089434.9 as application number discloses Steel ladle edge refractory castable and preparation method thereof, but wherein violent mechanical vibration and impact still can cause the damage of refractory materials.Namely mould material of the prior art effectively cannot solve short problem in steel ladle edge work-ing life.
Summary of the invention
For solving the problems of the technologies described above, the present invention is according to steel ladle edge mould material Wear mechanism, and provide a kind of refractory castable having high strength, slag adhesion and good heat-resistant knocking stability and take into account, it significantly can promote the functional quality of ladle.
The raw material of steel ladle edge refractory castable provided by the invention comprises by mass percent: 40-60% flint clay aggregate, 15-25% uses rear magnesia carbon brick, 15-25% alumine, 1-3% cement, 1-2% boron glass, 2-3% triphane, 3-4% kyanite, 2-3% silicon powder, 1-2% steel fiber, 1-2% bonding agent.
Preferably, described bonding agent comprises one or more in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and explosion-proof fiber.
Preferably, described flint clay aggregate is superfine.
Preferred, flint clay aggregate used is 10-25mm by particle diameter, and particle diameter is 5-10mm, the level Four grain composition of particle diameter to be 3-5mm and particle diameter be 1-3mm, shared by described level Four grain composition, weight percent is respectively: 13-20%, 7-12%, 7-15%, 13-20%.
Preferably, described is converter body brick with rear magnesia carbon brick, and the trade mark is MT-14A, and it is by the preparation of following method:
After converter body is removed, by magnesia carbon brick through artificial selection, reject slag and the metamorphic layer of the working face of molten steel contact, through jaw crusher, roller pair breaking crusher machine, again through twice magnetic separation screening, obtaining granularity is two grain compositions that 0.088-1mm and granularity are not more than 0.088mm.
Preferably, described alumine is the klining of falling cigarette system, Al
2o
3>=88wt%, volume density is greater than 3.1g/cm
3, it is aggregate between 0.088-1mm and 325 order fine powders that alumine used comprises particle diameter, and fine powder percent of pass is greater than 85%.
Preferably, described alumine aggregate and fine powder shared weight percent in refractory castable is respectively: 5-15% and 5-15%.
Preferably, described boron glass and triphane fineness are greater than 500 orders.
Preferably, described cement is pure calcium aluminate cement.Preferred, its trade mark is: CA-50.
Preferably, described kyanite fineness is greater than 200 orders.
Preferably, described silicon powder is that dust agree 95%.
The method that the present invention prepares steel ladle edge mould material comprises:
1) converter " MT-14A " body brick, first will reclaimed, through artificial selection, reject the slag and metamorphic layer that contact with molten steel, through jaw crusher, roller pair breaking crusher machine, again through two-stage 4000 Gauss magnetic separation, screening, obtaining granularity is two grain compositions that 0.088-1mm and particle diameter are not more than 0.088mm.
2), just flint clay aggregate, pour stirrer into successively with two gratings, bauxites aggregate, fine powder, pure calcium aluminate cement, boron glass, triphane, kyanite, silicon powder, steel fibers of rear magnesia carbon brick, bonding agent is added after being dry mixed 2-3 minutes, remix 3-4 minutes, releases and uses jumbo bag packed for standby use.
3), transport to scene after, place fetal membrane, pour material into stirrer, add 6.5% water and stir after 5--6 minute, in injection fetal membrane, adopting φ 50 vibrating head, feeds in raw material in vibration limit, limit, make material evenly be covered with whole fetal membrane, rear continuation of having fed in raw material is vibrated, till not having air pocket to overflow.
4), different according to season in winter, summer, demould time is respectively 10-12 hours and 4-6 hours, allows rear static placement after three days, toast together with magnesia carbon brick ladle, can use.
Add boron glass in the present invention and can reduce refractoriness, impel formation vitreum, improve the intensity of refractory materials largely; Especially middle low temperature working strength, by adding boron glass, triphane Composite sintering agent, effectively improves 500--1300 DEG C of temperature range intensity, thus reaches total temperature interval and have higher-strength.Another effect adding boron glass in the present invention forms glass liquid phase at low temperatures by boron glass, better can protect the oxidation of C element.
Using rear magnesia carbon brick by adding in the present invention, introducing simple substance C cleverly, by the introducing of C, increase the wetting angle of refractory materials, effectively prevent dry slag; Also introduced magnesia by having introduced waste magnesia carbon brick particle, it can react with alumine generation in-situ reducing, generates aluminum-spinel and makes volumetric expansion, offset the volumetric shrinkage brought in sintering process, improve heat-resistant knocking stability.
The present invention adopts superfine flint clay aggregate, and than employing alumine class low price, performance also can reach the index of alumine, and has better heat-resistant knocking stability.
The present invention has taken into account high strength simultaneously, and slag adhesion and excellent heat-resistant knocking stability energy, substantially increase steel ladle edge functional quality.
Embodiment
The following is some embodiments of the present invention, its be only used as explanation of the invention and and unrestricted.In following embodiment, all percentage ratio is massfraction.
The method that the present invention prepares steel ladle edge mould material comprises:
1) converter " MT-14A " body brick that first will reclaim, through manually choosing, rejects the slag and metamorphic layer that contact with molten steel, through jaw crusher, roller pair breaking crusher machine, again through two-stage 4000 Gauss magnetic separation, sieves.
2) just flint clay aggregate, pour stirrer into successively with two gratings, bauxites aggregate, fine powder, pure calcium aluminate cement, boron glass, triphane, kyanite, silicon powder, steel fibers of rear magnesia carbon brick, bonding agent is added after being dry mixed 2-3 minutes, remix 3-4 minutes, releases and uses jumbo bag packed for standby use.
3) after transporting to scene, place fetal membrane, pour material into stirrer, add 6.5% water and stir after 5-6 minute, in injection fetal membrane, adopting φ 50 vibrating head, feeds in raw material in vibration limit, limit, make material evenly be covered with whole fetal membrane, rear continuation of having fed in raw material is vibrated, till not having air pocket to overflow.
4) different according to the season in winter, summer, demould time is respectively 10-12 hours and 4-6 hours, allows rear static placement after three days, toast together with magnesia carbon brick ladle, can use.
The following is the present invention and prepare the proportioning that steel ladle edge mould material adopts:
Embodiment 1:
A kind of steel ladle edge refractory castable, its raw material comprises mass percent and is:
Particle diameter is the flint clay aggregate of 10-25mm: 16%, and particle diameter is the flint clay aggregate of 5-10: 8%, and particle diameter is the flint clay aggregate of 3-5mm: 9%, and particle diameter is the flint clay aggregate of 1-3mm: 15%; With rear magnesia carbon brick aggregate: particle diameter is the material of 0.088-1mm: 12%, and particle diameter is less than the material of 0.088mm: 10%; Alumine: particle diameter is the material of 0.088-1mm: 7%, 325 object fine powders: 9%; Pure calcium aluminate cement: 1%, boron glass: 2%, triphane: 2%, kyanite: 3%, silicon powder: 2%, steel fiber: 2%, bonding agent: 2%, bonding agent comprises tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and explosion-proof fiber.
Embodiment 2:
A kind of steel ladle edge refractory castable, its raw material comprises mass percent and is:
Particle diameter is the flint clay aggregate of 10-25mm: 16%, and particle diameter is the flint clay aggregate of 5-10: 8%, and particle diameter is the flint clay aggregate of 3-5mm: 9%, and particle diameter is the flint clay aggregate of 1-3mm: 15%; With rear magnesia carbon brick aggregate: particle diameter is the material of 0.088-1mm: 10%, and particle diameter is less than the material of 0.088mm: 12%; Alumine: particle diameter is the material of 0.088-1mm: 9%, 325 object fine powders: 7%; Pure calcium aluminate cement: 1%, boron glass: 1.5%, triphane: 2%, kyanite: 3%, silicon powder: 2.5%, steel fiber: 2%, bonding agent: 2%, bonding agent comprises tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and explosion-proof fiber.
Embodiment 3:
A kind of steel ladle edge refractory castable, its raw material comprises mass percent and is:
Particle diameter is the flint clay aggregate of 10-25mm: 16%, and particle diameter is the flint clay aggregate of 5-10: 8%, and particle diameter is the flint clay aggregate of 3-5mm: 9%, and particle diameter is the flint clay aggregate of 1-3mm: 15%; With rear magnesia carbon brick aggregate: particle diameter is the material of 0.088-1mm: 7%, and particle diameter is less than the material of 0.088mm: 15%; Alumine: particle diameter is the material of 0.088-1mm: 10%, 325 object fine powders: 5%; Pure calcium aluminate cement: 2%, boron glass: 1%, triphane: 3%, kyanite: 4%, silicon powder: 2%, steel fiber: 1%, bonding agent: 2%, bonding agent comprises tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and explosion-proof fiber.
Claims (7)
1. a steel ladle edge refractory castable, it is characterized in that: described steel ladle edge refractory castable raw material comprises by mass percent: 40-60% flint clay aggregate, 15-25% uses rear magnesia carbon brick, 15-25% alumine, 1-3% cement, 1-2% boron glass, 2-3% triphane, 3-4% kyanite, 2-3% silicon powder, 1-2% steel fiber, 1-2% bonding agent.
2. steel ladle edge refractory castable according to claim 1, it is characterized in that, described is converter body brick with rear magnesia carbon brick, and the trade mark is MT-14A, and it is by the preparation of following method:
After converter body is removed, by magnesia carbon brick through artificial selection, reject slag and the metamorphic layer of the working face of molten steel contact, through jaw crusher, roller pair breaking crusher machine, again through twice magnetic separation screening, obtaining granularity is two grain compositions that 0.088-1mm and granularity are not more than 0.088mm.
3. steel ladle edge refractory castable according to claim 1, it is characterized in that, described alumine is the klining of falling cigarette system, Al
2o
3>=88wt%, it is aggregate between 0.088-1mm and 325 order fine powders that alumine used comprises particle diameter, and fine powder percent of pass is greater than 85%.
4. steel ladle edge refractory castable according to claim 1, it is characterized in that, described cement is pure calcium aluminate cement.
5. steel ladle edge refractory castable according to claim 1, it is characterized in that, described boron glass and triphane fineness are greater than 500 orders.
6. steel ladle edge refractory castable according to claim 1, is characterized in that, described bonding agent comprise in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and explosion-proof fiber one or more.
7. steel ladle edge refractory castable according to claim 1, it is characterized in that, described flint clay aggregate is 10-25mm by particle diameter, particle diameter is 5-10mm, the level Four grain composition of particle diameter to be 3-5mm and particle diameter be 1-3mm, shared by described level Four grain composition, weight percent is respectively: 13-20%, 7-12%, 7-15%, 13-20%.
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| CN201510424276.7A CN104987096A (en) | 2015-07-17 | 2015-07-17 | Steel ladle edge refractory castable |
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| CN201510424276.7A CN104987096A (en) | 2015-07-17 | 2015-07-17 | Steel ladle edge refractory castable |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106699201A (en) * | 2016-12-13 | 2017-05-24 | 攀枝花钢城集团有限公司 | Castable for steel making tundish slag dam |
| CN109336621A (en) * | 2018-10-12 | 2019-02-15 | 甘肃酒钢集团科力耐火材料股份有限公司 | A method of using waste and old hot-blast stove ball and recycling stopper production aluminium carbon packet is introduced along material |
| CN111004044A (en) * | 2019-12-26 | 2020-04-14 | 上海宝九和耐火材料有限公司 | Lightweight refractory castable for petrochemical industry |
| CN111848187A (en) * | 2020-07-08 | 2020-10-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for preparing iron ladle castable by using high-carbon ferrochrome slag |
| CN112358272A (en) * | 2020-11-12 | 2021-02-12 | 河南好运祥耐材有限公司 | Acid-resistant ceramic composite material for gas recovery pipeline |
| CN113912403A (en) * | 2021-09-06 | 2022-01-11 | 海城利尔麦格西塔材料有限公司 | Low-cost grouting material for back of cooling wall of blast furnace |
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|---|---|---|---|---|
| CN101585710A (en) * | 2008-05-23 | 2009-11-25 | 宝山钢铁股份有限公司 | Refractory material for coal loading port of coke oven |
| CN102503496A (en) * | 2011-11-17 | 2012-06-20 | 江苏苏嘉集团新材料有限公司 | Magnesium carbon pouring material |
| CN102690123A (en) * | 2012-04-27 | 2012-09-26 | 洛阳市科创耐火材料有限公司 | Quick-drying explosion-proof castable and producing process thereof |
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2015
- 2015-07-17 CN CN201510424276.7A patent/CN104987096A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585710A (en) * | 2008-05-23 | 2009-11-25 | 宝山钢铁股份有限公司 | Refractory material for coal loading port of coke oven |
| CN102503496A (en) * | 2011-11-17 | 2012-06-20 | 江苏苏嘉集团新材料有限公司 | Magnesium carbon pouring material |
| CN102690123A (en) * | 2012-04-27 | 2012-09-26 | 洛阳市科创耐火材料有限公司 | Quick-drying explosion-proof castable and producing process thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106699201A (en) * | 2016-12-13 | 2017-05-24 | 攀枝花钢城集团有限公司 | Castable for steel making tundish slag dam |
| CN109336621A (en) * | 2018-10-12 | 2019-02-15 | 甘肃酒钢集团科力耐火材料股份有限公司 | A method of using waste and old hot-blast stove ball and recycling stopper production aluminium carbon packet is introduced along material |
| CN109336621B (en) * | 2018-10-12 | 2021-06-08 | 甘肃酒钢集团科力耐火材料股份有限公司 | Method for producing aluminum-carbon coated rim material by adopting waste hot-blast stove balls and introducing recycling stopper rods |
| CN111004044A (en) * | 2019-12-26 | 2020-04-14 | 上海宝九和耐火材料有限公司 | Lightweight refractory castable for petrochemical industry |
| CN111848187A (en) * | 2020-07-08 | 2020-10-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for preparing iron ladle castable by using high-carbon ferrochrome slag |
| CN112358272A (en) * | 2020-11-12 | 2021-02-12 | 河南好运祥耐材有限公司 | Acid-resistant ceramic composite material for gas recovery pipeline |
| CN113912403A (en) * | 2021-09-06 | 2022-01-11 | 海城利尔麦格西塔材料有限公司 | Low-cost grouting material for back of cooling wall of blast furnace |
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Application publication date: 20151021 |