CN1686948A - Improved type casting material based on bauxite for middle-small type ladle and preparation method - Google Patents
Improved type casting material based on bauxite for middle-small type ladle and preparation method Download PDFInfo
- Publication number
- CN1686948A CN1686948A CN 200510025007 CN200510025007A CN1686948A CN 1686948 A CN1686948 A CN 1686948A CN 200510025007 CN200510025007 CN 200510025007 CN 200510025007 A CN200510025007 A CN 200510025007A CN 1686948 A CN1686948 A CN 1686948A
- Authority
- CN
- China
- Prior art keywords
- alumina
- size
- magnesite clinker
- small
- ladles
- Prior art date
- 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
Landscapes
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention provides an improved type alumina base medium and small ladle pouring material and its preparation method. It is characterized by that it is prepared by using electrofused magnesium sand and sintered magnesium sand through the process of continuous granule-grade preparation, in is matrix a brown corundum micropowder is added, so that the aluminium-magnesium spinel phase is produced at high temperature, and the ratio of silicon dioxide micropowder and magnesium sand fine powder can be reasonably controlled so as to make the alumina base have good low-temperature, medium temperature and high-temperature strength.
Description
Technical field
The present invention relates to a kind of Refractory Carstables for Ladles and compound method, relate in particular to a kind of by electrosmelted magnesite clinker, the continuous grain composition preparation middle-size and small-size Refractory Carstables for Ladles of long lifetime alumina base of magnesite clinker and compound method through the improved modified form alumina of component base.Belong to fire resisting material field.
Background technology
Alumina base alumina-magnesia castable has good performance, use on middle-size and small-size ladle has obtained good effect, the technological line of such material is, in the matrix of high alumina material, admixture MgO powder is so that at high temperature form aluminum-spinel, spinel has less thermal expansivity and Young's modulus, fluxing point is 2135 ℃, and produces the volumetric expansion effect when forming, and makes material have higher refractoriness and good slag resistance, thermal shock resistance.And existing many Chinese and foreign documents reports.
For example, people such as Ji Ze report that in " exploitation of alumine spinel/Refractory Carstables for Ladles and application " literary composition adopting alumine and alumina base spinel is main raw material, prepared alumine-spinel pouring material, the add-on of having studied silicon powder and magnesite clinker fine powder is to the influence to the mould material anti-spalling of the influence of this mould material high temperature break resistant intensity and slag resistance and detonation suppressor newly developed.The result shows: add an amount of silicon powder and magnesite clinker fine powder, can improve the intensity and the slag resistance of mould material; The new type explosion proof agent can effectively send the anti-cracking property of mould material; The mould material of development is wrapped use at the 40t continuous casting steel, and effect is fine.(refractory materials 36 (6) 353-354,362,2002).Report quite a fewly abroad in this respect, all relate to the high Al that steel ladle pouring is used as JP2000000063607, JP1989000025661 etc.
2O
3Mould material.
Yet along with rapid popularization, the steel kind of flourish, the continuous casting of Iron And Steel Industry and furnace outer refining technology increases, tap to tap time lengthening, smelting temperature improve.Cause ladle liner alumina-magnesia castable working conditions more and more harsher.How to guarantee to adopt relatively inexpensive feedstock production long lifetime, well behaved mould material, really do not solve as yet.Mould material is subjected to the erosion of slag and washing away of molten steel for a long time, deteriorate mostly from mould material matrix, situation from steel mill's practical application, the matrix of alumina-magnesia castable partly is prone to crackle, and more, bigger crackle occurs in the later stage, slag, molten steel are penetrated into mould material inside along crackle, have accelerated wear and tear speed, and produce and to peel off, reduced the work-ing life of ladle lining.
Therefore, the composition of matrix, structure and performance play an important role to the performance of mould material, how to control the granularity and the consumption of each component in alumina base alumina-magnesia castable, are to prolong the alumina-magnesia castable key in work-ing life.And only in alumina-magnesia castable, add magnesia powder in the prior art, and under high temperature action, the reaction of magnalium expansible is fast, serves as a contrast at ladle and uses early stage, and reaction has been tending towards fully, and the later stage appearance is shunk and is easily cracked, peels off.And still appreciable in the laboratory is detected be bulking effect under the high temperature.And later stage crackle generation is explained by so-called " expand with heat and contract with cold and can't eliminate ".
Summary of the invention
The object of the present invention is to provide a kind of middle-size and small-size Refractory Carstables for Ladles of long lifetime alumina base and compound method through improvement.Make the Refractory Carstables for Ladles that provides in the bag age that 40 tons of converter steels are wrapped, bring up to 80 stoves-120 stove, even also the life-span raising reaches 2 times from original average 60 stoves.
In order to improve the work-ing life of ladle lining, emphasis of the present invention is to solve following two problems: 1. the performance that strengthens matrix by the component allotment; 2. reduce the later stage ladle and foil existing crackle.The present invention that Here it is is different from the basic point of departure of prior art.
The invention is characterized in: 1. in matrix, add brown fused alumina micropowder in right amount, and,, and make mould material possess good low temperature, middle gentle hot strength with reinforcement matrix by rationally controlling the add-on of fine silica powder and magnesia powder.2. utilize allotment electrosmelted magnesite clinker, the continuous grain composition method of magnesite clinker, it is long-lasting that the magnalium expansion reaction of material internal is had in 〉=1000 ℃ of temperature ranges, foils existing shrinkage crack and peel off thereby reduce the later stage ladle.
Particularly, the concrete mass percent of forming of the middle-size and small-size Refractory Carstables for Ladles of alumina base provided by the invention is:
20-10mm alumina 10-25%
10-5mm alumina 10-15%
5-3mm alumina 8-18%
3-1mm alumina 10-25%
≤ 1mm alumina 5-15%
≤ 75 μ m alumina 5-15%
It is 2-6 that 4-2mm magnesite clinker 1-10% recommends add-on
It is 2-6 that 2-1mm magnesite clinker 1-10% recommends add-on
It is 2-6 that≤1mm electrosmelted magnesite clinker 1-10% recommends add-on
It is 2-6 that≤75 μ m electrosmelted magnesite clinker 1-10% recommend add-on
Simultaneously, add three kinds of additives:
A: fine silica powder (≤5 μ m) 1～3%
The weight ratio 1 of it and electrosmelted magnesite clinker fine powder: 1-2: 1, be good with 2: 1.
B: brown fused alumina micropowder (≤5 μ m) 1～5%
C: tripoly phosphate sodium STPP 0.1～0.5%
In said components, can know and find out:
(1) in batching, introduces two kinds of different magnesia of magnesite clinker and electrosmelted magnesite clinker, except that can suitably reducing cost, the more important thing is reactive behavior difference, thereby make the solid state reaction that forms aluminum-spinel have long-lasting owing to two kinds of magnesia.
(2) by introducing brown fused alumina micropowder, reduce the alumina high-temperature shrinkage, improve hot strength, strengthen matrix.
(3) because variable grain degree magnesia, its activity is also different, the coarse particles magnesia that the 4mm that is introduced is following, use the later stage to continue to produce the aluminum-spinel reaction at ladle, thereby further cushion alumina contraction at high temperature, keep mould material volume in long-term contact molten steel process relatively stable, effectively prevent shrinkage crack and the generation of peeling off.
Obviously, washing away of the erosion of slag and molten steel is the high-temperature physics chemical process of a complexity, and its existing infiltration has erosion again, and be extremely harsh to material requirements.The present invention adopts thinner electrosmelted magnesite clinker fine powder and thicker magnesite clinker grain composition, and adds brown fused alumina micropowder in matrix, makes material sustained reaction at high temperature, generates spinel, and possesses excellent performance.Overcome the drawback of only using magnesia powder in the prior art and can not eliminating ladle use later stage shrinkage cracking, peel off, prolonged the work-ing life of ladle greatly and reduced cost.
The middle-size and small-size Refractory Carstables for Ladles of modified form alumina base provided by the invention is embodied in (1) and uses electrosmelted magnesite clinker and magnesite clinker grating to substitute the compound method of available technology adopting single variety magnesia powder; (2) the rational composition of matrix material makes that ultimate compression strength and folding strength improve (seeing embodiment for details) greatly after the performance of mould material such as middle temperature, the pyroprocessing.
Al by the middle-size and small-size Refractory Carstables for Ladles of modified form alumina base provided by the invention
2O
3Quality percentage composition 70-75.50, MgO quality percentage composition 9.0-15.0, volume density is 2.90-3.00g/cm
3, the primary line velocity of variation after 1600 ℃ * 3h handles is 0～+ 0.5%, and the secondary line velocity of variation is 0～+ 0.6%, and the cubic curve velocity of variation is 0～+ 0.8%.
Blending process by the middle-size and small-size Refractory Carstables for Ladles of modified form alumina base provided by the invention is:
(1) by above-mentioned composition weighing;
(2) component of additive in the component with≤1mm part mixed;
(3) will prepare burden in the compound of other particle and step (2) mix, stand-by.
Embodiment
Further illustrate substantive distinguishing features of the present invention and obvious improvement below by specific embodiment.
Embodiment 1
Refractory Carstables for Ladles content Al
2O
3Mass percent is 70.5, MgO is 10.8.Concrete proportioning is a 20-10mm alumina 15%, 10-5mm alumina 10%, 5-3mm alumina 8%, 3-1mm alumina 10% ,≤1mm alumina 15% ,≤75 μ m alumina 11.5%; 4-2mm magnesite clinker 2%, 2-1mm magnesite clinker 2% ,≤1mm electrosmelted magnesite clinker 2% ,≤75 μ m electrosmelted magnesite clinkers 4.8%, brown fused alumina micropowder 2.6%, fine silica powder 2.4%, tripoly phosphate sodium STPP 0.5%.Weigh earlier, carry out mixing with other particle again with behind three kinds of additives and the≤1mm part component premix then by said ratio, stand-by.
Embodiment 2
Refractory Carstables for Ladles Al is provided
2O
3The quality percentage composition is 74.8, MgO13.60.The grain composition proportioning is a 20-10mm alumina 10%, 10-5mm alumina 12%, 5-3mm alumina 18%, 3-1mm alumina 15% ,≤1mm alumina 5% ,≤75 μ m alumina 10%; 4-2mm magnesite clinker 3%, 2-1mm magnesite clinker 4%, the brown fused alumina micropowder 2.2% of≤1mm electrosmelted magnesite clinker 3% ,≤75 μ m electrosmelted magnesite clinkers 5% ,≤5 μ m, fine silica powder (≤5 μ m) 2%, tripoly phosphate sodium STPP 0.2%.After the prescription weighing, carry out mixing with other particle again with behind three kinds of additives and the≤1mm part component premix, stand-by.
Contrast as following table with the existing product index after testing:
| Project | Condition | Comparative example | Embodiment 1 | Embodiment 2 |
| Al 2O 3??％ | ????72.2 | ????70.5 | ????74.8 | |
| MgO????％ | ????11.8 | ????10.8 | ????13.60 | |
| Volume density g/cm 3 | ????2.98 | ????2.98 | ????2.95 | |
| Compressive strength MPa | 110℃*24h | ????44.6 | ????43.4 | ????48.4 |
| 1000℃*3h | ????30.2 | ????49.6 | ????55.2 | |
| 1600℃*3h | ????57.1 | ????66.9 | ????68.2 | |
| Folding strength MPa | 110℃*24h | ????7.29 | ????7.36 | ????7.7 |
| 1000℃*3h | ????5.4 | ????8.5 | ????8.6 | |
| 1600℃*3h | ????9.3 | ????11.2 | ????10.7 | |
| Line changes % | 1600 ℃ of * 3h | ????+0.82 | ????+0.39 | ????+0.46 |
| 1600 ℃ of * 3h of secondary | ????-0.21 | ????+0.43 | ????+0.56 | |
| Three 1600 ℃ of * 3h | ????-0.64 | ????+0.67 | ????+0.72 |
Claims (8)
1, the middle-size and small-size Refractory Carstables for Ladles of modified form alumina base is a main matrix with alumina and magnesia, it is characterized in that:
1. described magnesia is to be formed by electrosmelted magnesite clinker and the continuous grain composition of magnesite clinker;
2. control the ratio of fine silica powder and magnesia powder;
3. in matrix, add brown fused alumina micropowder, make it to generate under the high temperature aluminum-spinel phase.
2, by the middle-size and small-size Refractory Carstables for Ladles of the described modified form alumina of claim 1 base, it is characterized in that the quality group of described mould material becomes:
20-10mm alumina 10-25%
10-5mm alumina 10-15%
5-3mm alumina 8-18%
3-1mm alumina 10-25%
≤ 1mm alumina 5-15%
≤ 75 μ m alumina 5-15%
4-2mm magnesite clinker 1-10%
2-1mm magnesite clinker 1-10%
≤ 1mm electrosmelted magnesite clinker 1-10%
≤ 75 μ m electrosmelted magnesite clinker 1-10%
Fine silica powder 1～3%
Brown fused alumina micropowder 1～5%
And tripoly phosphate sodium STPP 0.1～0.5%.
3, by the middle-size and small-size Refractory Carstables for Ladles of the described modified form alumina of claim 2 base, it is characterized in that fine silica powder and brown fused alumina micropowder particle diameter in the mould material component, be advisable with≤5 μ m.
4, by claim 2 or the middle-size and small-size Refractory Carstables for Ladles of 3 described modified form alumina bases, it is characterized in that the described≤electrosmelted magnesite clinker fine powder of 75 μ m and the mass ratio of fine silica powder are 1: 1-2: 1.
5, by the middle-size and small-size Refractory Carstables for Ladles of the described modified form alumina of claim 4 base, it is characterized in that the described≤electrosmelted magnesite clinker fine powder of 75 μ m and the mass ratio of fine silica powder are 2: 1.
6,, it is characterized in that in the mould material composition by the middle-size and small-size Refractory Carstables for Ladles of the described modified form alumina of claim 2 base:
4-2mm magnesite clinker quality group becomes 2-6%
2-1mm magnesite clinker quality group becomes 2-6%
≤ 1mm electrosmelted magnesite clinker quality group becomes 2-6%
≤ 75 μ m electrosmelted magnesite clinker quality group become 2-6%.
7, by claim 1 or the middle-size and small-size Refractory Carstables for Ladles of 2 described modified form alumina bases, it is characterized in that described mould material Al
2O
3The quality percentage composition be 70-75.50, the quality percentage amounts of MgO is 9.0-15.0.
8, the method for the middle-size and small-size steel ladle pouring material of preparation modified form alumina base as claimed in claim 2 is characterized in that concrete steps are:
(1) each component is weighed by the described proportioning of claim 2;
(2) with in fine silica powder, brown fused alumina micropowder and three kinds of components and step (1) of tripoly phosphate sodium STPP as additive≤the component premix of 1mm;
(3) with the pre-mixed component of step (2), mix with other particulate alumina and magnesite clinker again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510025007XA CN1296324C (en) | 2005-04-08 | 2005-04-08 | Improved type casting material based on bauxite for middle-small type ladle and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510025007XA CN1296324C (en) | 2005-04-08 | 2005-04-08 | Improved type casting material based on bauxite for middle-small type ladle and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1686948A true CN1686948A (en) | 2005-10-26 |
| CN1296324C CN1296324C (en) | 2007-01-24 |
Family
ID=35304990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510025007XA Expired - Fee Related CN1296324C (en) | 2005-04-08 | 2005-04-08 | Improved type casting material based on bauxite for middle-small type ladle and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1296324C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276274A (en) * | 2011-07-19 | 2011-12-14 | 中南大学 | Refractory castable for ladle |
| CN102584299A (en) * | 2012-03-06 | 2012-07-18 | 长兴煤山新型炉料有限公司 | LM-T desilication swinging runner castable |
| CN102672154A (en) * | 2012-04-17 | 2012-09-19 | 莱芜钢铁集团有限公司 | Continuous-casting tundish comprehensive permanent liner and preparation method thereof |
| 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 |
| CN102746011A (en) * | 2012-07-30 | 2012-10-24 | 鲁山县宏业耐材有限公司 | Nano enhanced corundum-mullite pouring material |
| CN102951918A (en) * | 2012-12-05 | 2013-03-06 | 武汉钢铁(集团)公司 | Patching material for carbonless ladle working lining |
| CN103224401A (en) * | 2012-09-27 | 2013-07-31 | 中冶武汉冶金建筑研究院有限公司 | Energy-efficient sol combined mullite castable used for blast furnace air supply branch pipe inner liner |
| CN103467120A (en) * | 2013-08-29 | 2013-12-25 | 浙江长兴强立耐火材料有限公司 | Non-phosphorus and low-carbon alumina-magnesia unburned brick for stainless steel ladle and manufacturing method of brick |
| CN104355636A (en) * | 2014-10-31 | 2015-02-18 | 浙江金磊高温材料股份有限公司 | RH furnace dip pipe castable and preparation method thereof |
| CN110451994A (en) * | 2019-08-01 | 2019-11-15 | 辽宁科技大学 | A kind of casting material prefabricated part of magnesia firing of magnesium aluminate spinel whisker reinforcement |
| CN111362710A (en) * | 2020-05-11 | 2020-07-03 | 河南兴亚能源有限公司 | Homogenized alumina-based aluminum-magnesium castable and preparation method thereof |
| CN112408999A (en) * | 2020-11-24 | 2021-02-26 | 瑞泰马钢新材料科技有限公司 | Environment-saving dry material for continuous casting tundish and preparation method thereof |
| CN114873995A (en) * | 2022-05-11 | 2022-08-09 | 上海利尔耐火材料有限公司 | Low-expansion high-bending-resistance tundish retaining wall castable |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07330452A (en) * | 1994-06-13 | 1995-12-19 | Harima Ceramic Co Ltd | Casting refractories for molten steel treating equipment |
| CN1261390C (en) * | 2003-05-09 | 2006-06-28 | 宜兴天霸非金属材料有限公司 | Refractory casting material |
-
2005
- 2005-04-08 CN CNB200510025007XA patent/CN1296324C/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276274A (en) * | 2011-07-19 | 2011-12-14 | 中南大学 | Refractory castable for ladle |
| CN102584299A (en) * | 2012-03-06 | 2012-07-18 | 长兴煤山新型炉料有限公司 | LM-T desilication swinging runner castable |
| CN102584299B (en) * | 2012-03-06 | 2013-08-21 | 长兴煤山新型炉料有限公司 | LM-T desilication swinging runner castable |
| CN102672154A (en) * | 2012-04-17 | 2012-09-19 | 莱芜钢铁集团有限公司 | Continuous-casting tundish comprehensive permanent liner and preparation method thereof |
| CN102672154B (en) * | 2012-04-17 | 2014-01-15 | 莱芜钢铁集团有限公司 | Continuous-casting tundish comprehensive permanent liner and preparation method thereof |
| 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 |
| CN102746011A (en) * | 2012-07-30 | 2012-10-24 | 鲁山县宏业耐材有限公司 | Nano enhanced corundum-mullite pouring material |
| CN102746011B (en) * | 2012-07-30 | 2014-07-16 | 巩义市红育耐火材料厂 | Nano enhanced corundum-mullite pouring material |
| CN103224401B (en) * | 2012-09-27 | 2014-09-03 | 中冶武汉冶金建筑研究院有限公司 | Energy-efficient sol combined mullite castable used for blast furnace air supply branch pipe inner liner |
| CN103224401A (en) * | 2012-09-27 | 2013-07-31 | 中冶武汉冶金建筑研究院有限公司 | Energy-efficient sol combined mullite castable used for blast furnace air supply branch pipe inner liner |
| CN102951918A (en) * | 2012-12-05 | 2013-03-06 | 武汉钢铁(集团)公司 | Patching material for carbonless ladle working lining |
| CN103467120A (en) * | 2013-08-29 | 2013-12-25 | 浙江长兴强立耐火材料有限公司 | Non-phosphorus and low-carbon alumina-magnesia unburned brick for stainless steel ladle and manufacturing method of brick |
| CN103467120B (en) * | 2013-08-29 | 2015-01-21 | 浙江长兴强立耐火材料有限公司 | Non-phosphorus and low-carbon alumina-magnesia unburned brick for stainless steel ladle and manufacturing method of brick |
| CN104355636A (en) * | 2014-10-31 | 2015-02-18 | 浙江金磊高温材料股份有限公司 | RH furnace dip pipe castable and preparation method thereof |
| CN110451994A (en) * | 2019-08-01 | 2019-11-15 | 辽宁科技大学 | A kind of casting material prefabricated part of magnesia firing of magnesium aluminate spinel whisker reinforcement |
| CN110451994B (en) * | 2019-08-01 | 2022-08-16 | 辽宁科技大学 | Magnesium-based sintered castable prefabricated member reinforced by magnesium aluminate spinel whiskers |
| CN111362710A (en) * | 2020-05-11 | 2020-07-03 | 河南兴亚能源有限公司 | Homogenized alumina-based aluminum-magnesium castable and preparation method thereof |
| CN112408999A (en) * | 2020-11-24 | 2021-02-26 | 瑞泰马钢新材料科技有限公司 | Environment-saving dry material for continuous casting tundish and preparation method thereof |
| CN114873995A (en) * | 2022-05-11 | 2022-08-09 | 上海利尔耐火材料有限公司 | Low-expansion high-bending-resistance tundish retaining wall castable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1296324C (en) | 2007-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1296324C (en) | Improved type casting material based on bauxite for middle-small type ladle and preparation method | |
| CN101723685B (en) | Magnesia-alumina spinel stemming | |
| CN106431438B (en) | Castable for tundish slag-stopping wall and preparation method thereof | |
| CN102417361B (en) | Cr2O3-Al2O3 refractory material of anisotropic structure | |
| CN112142448B (en) | Gunning mix for converter steel tapping hole and preparation method thereof | |
| CN108191406A (en) | A kind of tundish magnesium dry-type stock for adding rear magnesium aluminium spinel powder and preparation method thereof | |
| CN105693259A (en) | Preparation technique of corundum spinel solid solution refractory material | |
| AU2007291593B2 (en) | Fired refractory ceramic product | |
| CN102329137A (en) | Carbon-free alumina-magnesia unburned brick and preparation method and application thereof | |
| CN113968745A (en) | Refractory castable for predecomposition system of co-processing solid waste cement kiln | |
| CN108033795A (en) | High alumina castable for fish torpedo ladle permanent layer | |
| CN108863414A (en) | A kind of high performance magnesia carbon brick and preparation method thereof | |
| CN115141008B (en) | Long-service-life swing groove castable and preparation method thereof | |
| CN113233908A (en) | Regenerated carbon-free brick and preparation method thereof | |
| CN114195529B (en) | High-strength magnesia refractory mortar for refining ladle | |
| CN102584288B (en) | Silica corundum brick | |
| CN105777160A (en) | MgO-Cr7C3 brick for ladle slag line and production method of MgO-Cr7C3 brick | |
| CN1096503A (en) | Compact high-alumina refractory brick | |
| CN113321495A (en) | Cement-free high-performance pumping furnace hearth material | |
| CN112759369A (en) | Magnesia-carbon brick with high thermal shock stability | |
| CN112194495A (en) | Steel ladle wall integral castable | |
| MXPA05005845A (en) | Heavy ceramic moulded body, method for producing said body and use of the same. | |
| CN107434404A (en) | A kind of zirconium composite high-performance electric smelting magnesia calcium zirconium brick and its manufacture method | |
| CN1680059A (en) | Bottom fire-proof material of large steel ladle | |
| CN102070346A (en) | Preparation method of alumina-magnesia-carbon brick |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI PENGPU SPECIAL REFRACTORY MATERIAL FACTOR Free format text: FORMER NAME: SHANGHAI PENGPU SPECIAL REFRACTORY FACTORY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 200072, No. 1183, Lane 155, Shanghai Road, Shanghai Patentee after: Shanghai Pengpu Special Refractory Material Factory Co., Ltd. Address before: 200072, No. 1183, Lane 155, Shanghai Road, Shanghai Patentee before: Pengpu Special Refractory Factory, Shanghai |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070124 Termination date: 20140408 |