CN102964134A - Induction smelting furnace lining refractory material and manufacture method thereof - Google Patents
Induction smelting furnace lining refractory material and manufacture method thereof Download PDFInfo
- Publication number
- CN102964134A CN102964134A CN2012104652467A CN201210465246A CN102964134A CN 102964134 A CN102964134 A CN 102964134A CN 2012104652467 A CN2012104652467 A CN 2012104652467A CN 201210465246 A CN201210465246 A CN 201210465246A CN 102964134 A CN102964134 A CN 102964134A
- Authority
- CN
- China
- Prior art keywords
- furnace lining
- quartz sand
- electric smelting
- proof material
- fire proof
- 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
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Ceramic Products (AREA)
Abstract
The invention provides an induction smelting furnace lining refractory material and a manufacture method thereof. The induction smelting furnace lining refractory material comprises quartz sand, electric smelting acrylic powder, a mineralizer and a sintering agent. The refractory material is prepared by the steps of adding the electric smelting acrylic powder, the mineralizer and the sintering agent in the quartz sand which is a main raw material, mixing and stirring, and carrying out mechanical casting or smelting. The induction smelting furnace lining refractory material has the advantages of high strength, high refractoriness under load, stable chemical property, erosion resistance, strong high-intensity magnetic field stirring force resistance, long service life, low cost and simpleness in production process, is convenient and safe to use, and can be used for repairing a furnace lining in a short time.
Description
Technical field
The present invention relates to field of new, belong to professional non-cement refractory materials class, specifically a kind of induction melting fire proof material of furnace lining and manufacture method thereof.
Background technology
At present, in the domestic existing enterprise production technology, all adopt conventional, general refractory materials production technology, be used for the industry furnace lining material making such as smelting, smelting metal liquid of smeltings, cast ferrous metal (machine casting, spheroidal graphite casting, special steel and alloy smelting), smelting non-ferrous metal (meltings such as copper, alloyed copper, aluminium, aluminium alloy and zinc), dry type vibratory moulding or half dry type ramming process are all adopted in its moulding.
Because the difference of operation in the construction process is not meticulous such as operation, beat and build not tight the grade in the work and neglect reason, cause furnace lining structure loose, in addition to the understanding of this type stove, understand not, study not deeply, affect simultaneously the work-ing life of responding to furnace lining.And the dried material that shakes of the dry type of using external import, although solved the difficult problem in work-ing life of stove, its cost is higher; Although the home products price is low, its anti-metallic solution corrodes unbalanced, and impedance metallic solution poor permeability lacks the shortcomings such as safe handling property.
Summary of the invention
The objective of the invention is: a kind of easy to operate, use safety is provided, and comprehensive cost is low, and smelting efficiency is high, and it is consistent to have basic, normal, high temperature physical strength, and the whipping force of anti-the high-intensity magnetic field is strong; Have low porosity, anti-permeability performance is good; Have good thermostability, and chemical stability, with metallic solution, slag generation chemical reaction, can not pollute molten metal; It is stable to have volume change, and the furnace lining material thermal expansivity is little; Have good insulativity, the iron level in the furnace lining material is low, iron level is controlled at Novel fire-resistant furnace lining material and a kind of safety, the tool life-span is long, purposes the is wide novel refractory manufacturing process used below 0.5%.
To achieve these goals, a kind of induction melting fire proof material of furnace lining provided by the invention, comprise quartz sand, electric smelting crystal powder, mineralizer, agglutinant, described refractory materials is as main raw material take quartz sand, add again electric smelting crystal powder, mineralizer and agglutinant and carry out mix and blend, the refractory materials that the mode of employing machine casting or melting is made.
Further, the chemical ingredients of described quartz sand is SiO
2＞97-99%, CaO＜0.02%, Fe
2O
3＜0.02%, Al
2O
3＜0.07%, that described quartz sand also comprises before mixing is selected, broken, washing, oven dry, screening and checking procedure.
Further, described electric smelting crystal powder includes the quartzy fine powder of electric smelting and the following electric smelting crystal of 1 μ m micro mist about 325 orders.
Further, described checking procedure comprises reaching after the white towel wiping without dirt and adopting chemical analysis method to detect composition in order to clear water friction flushing quartz sand and meets SiO
2＞97-99%, CaO＜0.02%, Fe
2O
3＜0.02%, Al
2O
3＜0.07% requirement.
Further, the raw material ratio that described refractory materials is made is: quartz sand: 55-75%, quartzy fine powder: the 15-25% of electric smelting, quartzy micro mist: the 4-15% of electric smelting, agglutinant: 1-5%, mineralizer: 0.01-0.04%.
The present invention is with natural quartz---silica (its chemical ingredients: SiO
2＞97-99%, CaO＜0.02%, Fe
2O
3＜0.02%, Al
2O
3＜0.07%) is main raw material, adds again the quartzy fine powder (325 order) of electric smelting, the admixture (mineralizer) of micro mist (1 μ m is following) and trace, the novel refractory that a small amount of agglutinant (boride) is made.Quartz sand---silica wherein, through selected, fragmentation, washing, oven dry, after the screening (the strict method of inspection: with after the white towel wiping without dirt, the chemical analysis composition is qualified) with electric smelting crystal fine powder, micro mist; The dry type refractory materials that forms behind admixture, the abundant mix and blend of agglutinant.In, can play nodulizing during low temperature, make it consistent with hot strength.And in design, add the admixture (mineralizer) of a small amount of agglutinant and trace so that in, low temperature has certain physical strength effect, the not enough performance that overcome in the material in the past in (adding cement, Jia Shui), the dry materials, low temperature intensity is low.Simultaneously in above-mentioned materials, introduce admixture, agglutinant, the effect that mainly be in playing, low temperature intensity improves.In design, when making, according to material particle size control strict, science with rationally introduce the mineralizer effect, can improve the stable of material at high temperature line velocity of variation, the phenomenon of crackle occurs when preventing furnace lining work.
The present invention also provides a kind of manufacture method of induction melting fire proof material of furnace lining, adopt the method for grey iron casting to obtain described induction melting fire proof material of furnace lining, it is characterized in that: the control smelting temperature is at 1380 ℃-1450 ℃, quartz sand is selected materials, broken, clean, oven dry, the operation of screening step, obtain inclusion-free, product granularity of fine quality is the quartz sand aggregate of 1mm-18mm, carry out further fragmentation, it is the quartz sand aggregate of 0.5mm-8mm that screening obtains granularity, be that the quartz sand aggregate of 0.5mm-8mm is added mineralizer with grinding to form granularity after the quartzy fine powder of 200-325 purpose electric smelting and the screening, standard according to the 25kg/ bag after agglutinant mixes packs, after the double-ply bag packing, waiting to dispatch from the factory, vibrates in the scene, namely get high strength furnace lining body after the roasting.
Further, the present invention also provides the manufacture method of another induction melting fire proof material of furnace lining, adopt the method for spheroidal graphite casting to obtain described induction melting fire proof material of furnace lining, the control smelting temperature is between 1480-1560 ℃, quartz sand is selected materials, broken, clean, oven dry, screening, the operation of grinding steps, adopt the quartzy fine powder of electric smelting and the quartzy micro mist of electric smelting and agglutinant, the mineralizer mixed grinding, with inclusion-free, product granularity of fine quality is to pack behind the quartz sand aggregate mix and blend of 1mm-8mm, site operation vibrates, namely get highdensity furnace lining body after the roasting.
Further, the present invention also provides the manufacture method of another induction melting fire proof material of furnace lining, adopt the straight carbon steel melting method to obtain described induction melting fire proof material of furnace lining, control its smelting temperature between 1580-1670 ℃, quartz sand is selected materials, broken, clean, oven dry, screening, the operation of grinding steps, adopt the quartzy fine powder of electric smelting and the quartzy micro mist of electric smelting and agglutinant, the mineralizer mixed grinding, with inclusion-free, product granularity of fine quality is to pack behind the quartz sand mix and blend of 1mm-15mm, site operation vibrates, namely get highdensity furnace lining body after the roasting.
The present invention's design is to main raw material(s) quartzite---silica, during process for processing (making sand, powder), change in the past pickling operation technique (method), directly with clear water friction flushing, reach the testing requirement of frustrating rear unstained target with white towel scrubber, simultaneously not only saved productive expense, accomplished again environmentally safe, and guaranteed the former attribute of raw produce; raw products.
Advantage of the present invention is, not only has the fire proof material of furnace lining of high strength, high RUL performance, or chemically stable, anti-erosion, and anti-high-intensity magnetic field whipping force is strong, long service life, cost is low, and production technique is simple, and is easy to use, safe, and it is short to repair the furnace lining time.
A kind of high-performance provided by the present invention, refractory materials can require difference according to melting cheaply, designs dissimilar material materials, is widely used in the industry fire proof material of furnace lining such as smelting, casting nonferrous metal.Also can be used for making large-scale iron and steel enterprise side base continuous casting---tundish cylinder-packing body and function material, can also be used for various silica fire resistant brick structuress---the material of refractory mortar (refractoriness under load is high) and the repairing of various lining bodies.
Embodiment
The below provides embodiment the present invention is described in further details.
With natural quartz---silica (its chemical ingredients: SiO
2＞97-99%, CaO＜0.02%, Fe
2O
3＜0.02%, Al
2O
3＜0.07%) is main raw material, adds again the quartzy fine powder (325 order) of electric smelting, the admixture (mineralizer) of micro mist (1 μ m is following) and trace, the novel refractory that a small amount of agglutinant (boride) is made.Quartz sand---silica wherein, through selected, fragmentation, washing, oven dry, after the screening (the strict method of inspection: with after the white towel wiping without dirt, the chemical analysis composition is qualified) with electric smelting crystal fine powder, micro mist; The dry type refractory materials that forms behind admixture, the abundant mix and blend of agglutinant.In, can play nodulizing during low temperature, make it consistent with hot strength.And in design, add the admixture (mineralizer) of a small amount of agglutinant and trace so that in, low temperature has certain physical strength effect, the not enough performance that overcome in the material in the past in (adding cement, Jia Shui), the dry materials, low temperature intensity is low.Simultaneously in above-mentioned materials, introduce admixture, agglutinant, the effect that mainly be in playing, low temperature intensity improves.In design, when making, according to material particle size control strict, science with rationally introduce the mineralizer effect, can improve the stable of material at high temperature line velocity of variation, the phenomenon of crackle occurs when preventing furnace lining work.
The present invention's design is to main raw material(s) quartzite---silica, during process for processing (making sand, powder), change in the past pickling operation technique (method), directly with clear water friction flushing, reach the testing requirement of frustrating rear unstained target with white towel scrubber, simultaneously not only saved productive expense, accomplished again environmentally safe, and guaranteed the former attribute of raw produce; raw products.
Realize dry type, the dried refractory materials that shakes that the present invention makes, its raw material ratio feature is: silica: 55-75%, quartzy fine powder: the 15-25% of electric smelting, micro mist: 4-15%, a small amount of agglutinant: 1-5%, micro-admixture (mineralizer): 0.01-0.04%.
Given this, make induction furnace, melting different metal material according to us by induction furnace, melting, operating procedure being understood and understanding, being analyzed: its smelting temperature is different with chemical ingredients, makes the induction furnace lining material according to different technique.The designed induction furnace lining refractories of the present invention can be produced as follows several types:
Embodiment 1
The ash iron casting: the production technique of required induction furnace lining refractories is with refining quartzite---silica aggregate: (6-40 order) 60%, silica sand: (70-140 order) 12%, with the quartzy fine powder of electric smelting and micro mist: 24% and a small amount of agglutinant: 3% and admixture: 0.04%, jointly be ground to 47 μ m, mix rear pack, passed examination is waited to dispatch from the factory.
Embodiment 2
Spheroidal graphite cast iron is made: the production technique of required induction furnace lining refractories is with refining washing quartzite---silica aggregate (4-40 order): 65%, silica sand (70-140 order): 13%, with the quartzy fine powder of electric smelting and micro mist: 19% and a small amount of agglutinant: 2% and admixture: 0.03%, jointly be ground to 25 μ m, mix rear pack, passed examination is waited to dispatch from the factory.
Embodiment 3
Straight carbon steel is smelted operation: the production technique of required induction furnace lining refractories is with refining quartzite---silica aggregate (2-40 order): 67%, silica sand (40-70): 10%, with the quartzy fine powder of electric smelting and micro mist: 20% and a small amount of agglutinant: 1% and admixture: 0.02%, jointly be ground to 20 μ m, mix rear pack, passed examination is waited to dispatch from the factory.
In sum, the fire proof material of furnace lining that not only has high strength, high RUL performance of the present invention, or chemically stable, anti-erosion, anti-high-intensity magnetic field whipping force is strong, long service life, cost is low, and production technique is simple, and is easy to use, safe, repairs furnace lining time weak point.A kind of high-performance provided by the present invention, refractory materials can require difference according to melting cheaply, designs dissimilar material materials, is widely used in the industry fire proof material of furnace lining such as smelting, casting nonferrous metal.Also can be used for making large-scale iron and steel enterprise side base continuous casting---tundish cylinder-packing body and function material, can also be used for various silica fire resistant brick structuress---the material of refractory mortar (refractoriness under load is high) and the repairing of various lining bodies.
As known by the technical knowledge, the present invention can realize by other the embodiment that does not break away from its spirit or essential feature.Therefore, above-mentioned disclosed embodiment with regard to each side, all just illustrates, and is not only.All within the scope of the present invention or the change within being equal to scope of the present invention all be included in the invention.
Claims (8)
1. induction melting fire proof material of furnace lining, comprise quartz sand, electric smelting crystal powder, mineralizer, agglutinant, it is characterized in that: described refractory materials is as main raw material take quartz sand, add again electric smelting crystal powder, mineralizer and agglutinant and carry out mix and blend, the refractory materials that the mode of employing machine casting or melting is made.
2. induction melting fire proof material of furnace lining according to claim 1, it is characterized in that: the chemical ingredients of described quartz sand is SiO
2＞97-99%, CaO＜0.02%, Fe
2O
3＜0.02%, Al
2O
3＜0.07%, that described quartz sand also comprises before mixing is selected, broken, washing, oven dry, screening and checking procedure.
3. induction melting fire proof material of furnace lining according to claim 1 and 2 is characterized in that: described electric smelting crystal powder include the quartzy fine powder of electric smelting and the following electric smelting crystal of 1 μ m micro mist about 325 orders.
4. induction melting fire proof material of furnace lining according to claim 2 is characterized in that: described checking procedure comprises reaching after the white towel wiping without dirt and adopting chemical analysis method to detect composition in order to clear water friction flushing quartz sand and meets SiO
2＞97-99%, CaO＜0.02%, Fe
2O
3＜0.02%, Al
2O
3＜0.07% requirement.
5. induction melting fire proof material of furnace lining according to claim 1 and 2, it is characterized in that: the raw material ratio that described refractory materials is made is: quartz sand: 55-75%, quartzy fine powder: the 15-25% of electric smelting, quartzy micro mist: the 4-15% of electric smelting, agglutinant: 1-5%, mineralizer: 0.01-0.04%.
6. manufacture method of each described induction melting fire proof material of furnace lining according to claim 1-5, adopt the method for grey iron casting to obtain such as each described induction melting fire proof material of furnace lining of claim 1-5, it is characterized in that: the control smelting temperature is at 1380 ℃-1450 ℃, quartz sand is selected materials, broken, clean, oven dry, the operation of screening step, obtain inclusion-free, product granularity of fine quality is the quartz sand aggregate of 1mm-18mm, carry out further fragmentation, it is the quartz sand aggregate of 0.5mm-8mm that screening obtains granularity, be that the quartz sand aggregate of 0.5mm-8mm is added mineralizer with grinding to form granularity after the quartzy fine powder of 200-325 purpose electric smelting and the screening, standard according to the 25kg/ bag after agglutinant mixes packs, after the double-ply bag packing, waiting to dispatch from the factory, vibrates in the scene, namely get high strength furnace lining body after the roasting.
7. manufacture method of each described induction melting fire proof material of furnace lining according to claim 1-5, adopt the method for spheroidal graphite casting to obtain such as each described induction melting fire proof material of furnace lining of claim 1-5, it is characterized in that: the control smelting temperature is between 1480-1560 ℃, quartz sand is selected materials, broken, clean, oven dry, screening, the operation of grinding steps, adopt the quartzy fine powder of electric smelting and the quartzy micro mist of electric smelting and agglutinant, the mineralizer mixed grinding, with inclusion-free, product granularity of fine quality is to pack behind the quartz sand aggregate mix and blend of 1mm-8mm, site operation vibrates, namely get highdensity furnace lining body after the roasting.
8. manufacture method of each described induction melting fire proof material of furnace lining according to claim 1-5, adopt the method for straight carbon steel melting to obtain such as each described induction melting fire proof material of furnace lining of claim 1-5, it is characterized in that: control its smelting temperature between 1580-1670 ℃, quartz sand is selected materials, broken, clean, oven dry, screening, the operation of grinding steps, adopt the quartzy fine powder of electric smelting and the quartzy micro mist of electric smelting and agglutinant, the mineralizer mixed grinding, with inclusion-free, product granularity of fine quality is to pack behind the quartz sand mix and blend of 1mm-15mm, site operation vibrates, namely get highdensity furnace lining body after the roasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210465246.7A CN102964134B (en) | 2012-11-19 | 2012-11-19 | A kind of induction melting fire proof material of furnace lining and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210465246.7A CN102964134B (en) | 2012-11-19 | 2012-11-19 | A kind of induction melting fire proof material of furnace lining and manufacture method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102964134A true CN102964134A (en) | 2013-03-13 |
| CN102964134B CN102964134B (en) | 2015-09-09 |
Family
ID=47794605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210465246.7A Expired - Fee Related CN102964134B (en) | 2012-11-19 | 2012-11-19 | A kind of induction melting fire proof material of furnace lining and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102964134B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030666A (en) * | 2014-06-19 | 2014-09-10 | 苏州普京真空技术有限公司 | Shock-resistant quartz ceramic crucible |
| CN104073884A (en) * | 2014-07-08 | 2014-10-01 | 苏州普京真空技术有限公司 | Composite quartz ceramic crucible |
| CN105016746A (en) * | 2015-06-17 | 2015-11-04 | 长兴泓矿炉料有限公司 | Induction smelting furnace lining fireproof material |
| CN106220198A (en) * | 2016-07-26 | 2016-12-14 | 东莞市晶谷新材料技术有限公司 | A kind of refractory composite and preparation method thereof |
| CN108358649A (en) * | 2018-03-02 | 2018-08-03 | 合肥铭佑高温技术有限公司 | A kind of refractory material for smelting furnace furnace lining |
| CN108558371A (en) * | 2018-07-19 | 2018-09-21 | 武汉科技大学 | A kind of magnetic composite refractory and preparation method thereof |
| CN110128155A (en) * | 2019-06-03 | 2019-08-16 | 高邮市锐意炉衬材料有限公司 | A kind of furnace cupola furnace lining material and preparation method thereof |
| CN116730714A (en) * | 2023-06-14 | 2023-09-12 | 山东泰润冶金技术有限公司 | Acidic dry ramming mass and application thereof in preparing refractory material for intermediate frequency furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1110964A (en) * | 1994-04-25 | 1995-11-01 | 湖南省长沙石英砂厂 | Acid burner lining refractory material for induction furnace |
-
2012
- 2012-11-19 CN CN201210465246.7A patent/CN102964134B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1110964A (en) * | 1994-04-25 | 1995-11-01 | 湖南省长沙石英砂厂 | Acid burner lining refractory material for induction furnace |
Non-Patent Citations (1)
| Title |
|---|
| 邱复兴: "感应炉石英砂炉衬（Ⅰ）", 《内燃机配件》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030666A (en) * | 2014-06-19 | 2014-09-10 | 苏州普京真空技术有限公司 | Shock-resistant quartz ceramic crucible |
| CN104073884A (en) * | 2014-07-08 | 2014-10-01 | 苏州普京真空技术有限公司 | Composite quartz ceramic crucible |
| CN105016746A (en) * | 2015-06-17 | 2015-11-04 | 长兴泓矿炉料有限公司 | Induction smelting furnace lining fireproof material |
| CN106220198A (en) * | 2016-07-26 | 2016-12-14 | 东莞市晶谷新材料技术有限公司 | A kind of refractory composite and preparation method thereof |
| CN106220198B (en) * | 2016-07-26 | 2018-11-20 | 东莞市晶谷新材料技术有限公司 | A kind of refractory composite and preparation method thereof |
| CN108358649A (en) * | 2018-03-02 | 2018-08-03 | 合肥铭佑高温技术有限公司 | A kind of refractory material for smelting furnace furnace lining |
| CN108558371A (en) * | 2018-07-19 | 2018-09-21 | 武汉科技大学 | A kind of magnetic composite refractory and preparation method thereof |
| CN110128155A (en) * | 2019-06-03 | 2019-08-16 | 高邮市锐意炉衬材料有限公司 | A kind of furnace cupola furnace lining material and preparation method thereof |
| CN116730714A (en) * | 2023-06-14 | 2023-09-12 | 山东泰润冶金技术有限公司 | Acidic dry ramming mass and application thereof in preparing refractory material for intermediate frequency furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102964134B (en) | 2015-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102964134B (en) | A kind of induction melting fire proof material of furnace lining and manufacture method thereof | |
| CN101913893B (en) | Hot patching material for large face of converter | |
| CN102627463B (en) | Aluminum-spinel-corundum composite refractory material and preparation method as well as application thereof | |
| CN102173840B (en) | Unburned MgO-Cr3C2-C brick for steelmaking | |
| CN101654375B (en) | Low-carbon magnesia carbon brick | |
| CN101475382A (en) | Low carbon magnesia-carbon brick, method for manufacturing the same and use thereof | |
| CN102134166B (en) | Ramming material | |
| CN106892647A (en) | A kind of compound magnesia carbon brick and preparation method thereof | |
| CN102531643A (en) | Gunning lining-making method for steel ladle | |
| CN101337821A (en) | Low density fire resistant pouring material for KR stirring paddle | |
| CN106431436A (en) | Electric furnace cover castable taking aluminum-chromium slag as main material and preparation method thereof | |
| CN102329137A (en) | Carbon-free alumina-magnesia unburned brick and preparation method and application thereof | |
| CN102531653A (en) | Hot-state repair material made from waste magnesia-carbon brick and used for converter and preparation method thereof | |
| CN103449828A (en) | Repairing mass based on used magnesia carbon refractory and preparation method of repairing mass | |
| CN103880452B (en) | Unshaped refractory material | |
| CN105777158B (en) | Siliceous dry material for tundish for steel smelting as well as production method and construction method | |
| CN105819875A (en) | Refractory castable for Ausmelt copper smelting furnace flue and preparation method thereof | |
| CN102898168B (en) | Compound magnesium-aluminum-chrome refractory castable for copper smelting tundish | |
| CN102992805B (en) | High-thermal conductivity ultramicropore carbon brick and preparation method thereof | |
| CN102674860B (en) | Refractory castable for submerged-arc furnace for smelting ferro-nickel by using laterite-nickel ore | |
| CN107721437A (en) | A kind of environment-friendly type Martin sand and preparation method thereof | |
| CN106396706A (en) | Preparation method of thermal shock-resistant composite nozzle brick | |
| CN1323183C (en) | Method for jpreparing high ferrotitanium in use for smelting steel | |
| CN107285751A (en) | A kind of long-life iron runner castable | |
| CN107188582A (en) | A kind of high alumina refractory casting material and preparation method thereof |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20151119 |
|
| EXPY | Termination of patent right or utility model |