CN103833391B - A kind of silicon nitride complex phase silicon carbide brick and preparation method thereof - Google Patents
A kind of silicon nitride complex phase silicon carbide brick and preparation method thereof Download PDFInfo
- Publication number
- CN103833391B CN103833391B CN201410004180.0A CN201410004180A CN103833391B CN 103833391 B CN103833391 B CN 103833391B CN 201410004180 A CN201410004180 A CN 201410004180A CN 103833391 B CN103833391 B CN 103833391B
- Authority
- CN
- China
- Prior art keywords
- silicon carbide
- silicon nitride
- silicon
- complex phase
- minutes
- 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.)
- Active
Links
Abstract
The invention discloses a kind of silicon nitride complex phase silicon carbide brick, comprise the component of following weight percent: the silicon carbide sand of 43 ~ 80%, the industrial silicon of 5 ~ 19%, 3 ~ 15% fine silica powder, 10 ~ 20% silicon nitride, 0.5 ~ 3.5% transforming agent, the toughner of 0.5 ~ 4%, the bonding agent of 0.5 ~ 3% and 0.1 ~ 1% additive.Meanwhile, the invention also discloses the preparation method of above-mentioned ceramic refractory.Ceramic refractory provided by the invention has novelty, creativeness, advance and practicality, and wear-resistant, antistripping, and antiacid alkali ability is strong, to the coupling of monolithic lining, extends overall furnace life and plays sizable effect; Preparation method's science of the present invention is simple, utilizes the nitrogen in air and other nitride as burning till shielding gas, and the oxygen discharge in air is improve local containing oxygen rate in making processes, useful and harmless to physical environment, is applicable to wideling popularize.
Description
Technical field
The invention belongs to refractory field, be specifically related to a kind of silicon nitride complex phase silicon carbide brick and preparation method thereof.
Background technology
Along with increasing rapidly of the industrialized fast development in various countries and urban population, domestic waste and trade waste sharply increase, and cause severe contamination to Urban Natural environment, incineration treatment of garbage has necessity.
Tradition incinerator adopts several material to form, the furnace lining of whole body of heater adopts different refractory materialss, nonetheless, the material of incinerator furnace lining is because be in the condition of high temperature for a long time, key position often just needs to change within a short period of time, and work-ing life is extremely low, not only increases production cost, and the finishing of certain hour can be caused to stop work, production efficiency is produced and has a strong impact on.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, provides a kind of silicon nitride complex phase silicon carbide brick.
Another object of the present invention is to the preparation method that above-mentioned silicon nitride complex phase silicon carbide brick is provided.
Technical scheme: in order to achieve the above object, the present invention has specifically come like this: a kind of silicon nitride complex phase silicon carbide brick, comprises the component of following weight percent: the silicon carbide sand of 43 ~ 80%, the industrial silicon of 5 ~ 19%, 3 ~ 15% fine silica powder, 10 ~ 20% silicon nitride, 0.5 ~ 3.5% transforming agent, the toughner of 0.5 ~ 4%, the bonding agent of 1.0 ~ 3.5% and 0.1 ~ 1% additive.
Wherein, described silicon carbide sand is that 1.6 ~ 3.5 μm, 0.8 ~ 1.6 μm and < 0.8 μm three kinds form by fineness, and the mass ratio of three is 1.5 ~ 4.5:1.5 ~ 3:1 ~ 2.
Wherein, the fineness < 44 μm of described industrial silicon.
Wherein, described transforming agent is one or more mixing in carbon, titanium oxide, magnesium oxide, aluminum oxide, and the fineness < 44 μm of transforming agent.
Wherein, the fineness < 0.2 μm of described fine silica powder.
Wherein, described toughner is zirconium white and fineness < 88 μm.
Wherein, the preparation method of described bonding agent is: by mass percent get 10 ~ 30% xylogen, 0.5 ~ 3.5% carboxymethyl cellulose, 10 ~ 20% yellow starch gum, the urea of 0.5 ~ 1.5%, the paper fiber of 0.5 ~ 1.5% and 50 ~ 70% tap water, by above-mentioned paper fiber and from the beginning waterside mix and blend limit be heated to 50 DEG C, then continue to add xylogen, carboxymethyl cellulose, yellow starch gum Keep agitation, be slowly heated to 80 DEG C after namely stop heating, add urea after being cooled to room temperature and stir 5 ~ 8 minutes, latter standing more than 24 hours.The bonding agent made like this, first makes paper fiber to be uniformly dispersed, and secondly, finally adding urea can prevent it from volatilizing to greatest extent, causes the waste of raw material.
Wherein, described additive is rare earth oxide, preferential oxidation lanthanum or cerium oxide.
Prepare the method for above-mentioned arbitrary silicon nitride complex phase silicon carbide brick, comprise the following steps:
(1) by recipe ratio, industrial silicon, SiO 2 superfine powder, silicon nitride, transforming agent, toughner and additive are put into taper mixing equipment, mix 30 ~ 40 minutes, stand-by;
(2) take silicon carbide sand by formula ratio and stirrer put into by bonding agent, stir 5 ~ 8 minutes, the tap water then putting into two kinds of mixture total masses 1 ~ 3.5% continues stirring 3 ~ 5 minutes;
(3) material after mixing in step 1 is added stirrer, continue stirring 20 ~ 30 minutes, ageing mixture more than 36 hours after discharging;
(4) step 3 gained material is pressed into adobe;
(5) adobe is sent into Industrial Stoves and be heated to 120 DEG C, and continue baking more than 72 hours, furnace cooling;
(6) adobe of step 5 gained burnt till under nitrogen atmosphere protection, temperature is at 1100 ~ 1450 DEG C, and the time is greater than 96 hours;
(7) after step 6 is burnt till, be cooled to room temperature, take out kiln.
Beneficial effect: silicon nitride complex phase silicon carbide brick provided by the invention, wear-resistant, antistripping, antiacid alkali ability is strong, to the coupling of monolithic lining, extends overall furnace life and plays sizable effect; Preparation method's science of the present invention is simple, utilizes the nitrogen in air and other nitride as burning till shielding gas, and the oxygen discharge in air is improve local containing oxygen rate in making processes, useful and harmless to physical environment, is applicable to wideling popularize.
Embodiment
Embodiment 1:
Get weight percent be 70% silicon carbide sand, 10% industrial silicon, 5% fine silica powder, 10% silicon nitride, 0.5% magnesium oxide, the zirconium white of 2%, the bonding agent of 2% and 0.5% lanthanum trioxide; The preparation method of described bonding agent is: by mass percent get 30% xylogen, 3.5% carboxymethyl cellulose, 10% yellow starch gum, the urea of 1.5%, the paper fiber of 1% and 54% tap water, by above-mentioned paper fiber and from the beginning waterside mix and blend limit be heated to 50 DEG C, then continue to add xylogen, carboxymethyl cellulose, yellow starch gum Keep agitation, be slowly heated to 80 DEG C after namely stop heating, add urea after being cooled to room temperature and stir 5 ~ 8 minutes, latter standing more than 24 hours.First industrial silicon, SiO 2 superfine powder, silicon nitride, magnesium oxide, zirconium white and lanthanum trioxide are put into taper mixing equipment, mix 30 minutes, stand-by; Then silicon carbide sand and bonding agent are put into stirrer, stir 5 minutes; Previous mixed material is added stirrer, continues stirring 20 minutes, ageing mixture more than 36 hours after discharging; After discharging, gained mixture is pressed into adobe, and sends into Industrial Stoves and be heated to 120 DEG C, and continue baking more than 72 hours, furnace cooling; Gained adobe burnt till under nitrogen atmosphere protection, temperature is at 1100 DEG C, and the time is greater than 96 hours; After burning till, be cooled to room temperature, take out kiln.
Embodiment 2:
Get weight percent be 43% silicon carbide sand, 19% industrial silicon, 10% fine silica powder, 20% silicon nitride, 2% magnesium oxide, the zirconium white of 3%, the bonding agent of 2% and 1% lanthanum trioxide; The preparation method of described bonding agent is: by mass percent get 10% xylogen, 0.5% carboxymethyl cellulose, 20% yellow starch gum, the urea of 1%, the paper fiber of 1.5% and 67% tap water, by above-mentioned paper fiber and from the beginning waterside mix and blend limit be heated to 50 DEG C, then continue to add xylogen, carboxymethyl cellulose, yellow starch gum Keep agitation, be slowly heated to 80 DEG C after namely stop heating, add urea after being cooled to room temperature and stir 5 ~ 8 minutes, latter standing more than 24 hours.First industrial silicon, SiO 2 superfine powder, silicon nitride, magnesium oxide, zirconium white and lanthanum trioxide are put into taper mixing equipment, mix 30 minutes, stand-by; Then silicon carbide sand and bonding agent are put into stirrer, stir 5 minutes; Previous mixed material is added stirrer, continues stirring 20 minutes, ageing mixture more than 36 hours after discharging; After discharging, gained mixture is pressed into adobe, and sends into Industrial Stoves and be heated to 120 DEG C, and continue baking more than 72 hours, furnace cooling; Gained adobe burnt till under nitrogen atmosphere protection, temperature is at 1200 DEG C, and the time is greater than 96 hours; After burning till, be cooled to room temperature, take out kiln.
Embodiment 3:
Get weight percent be 50% silicon carbide sand, 15% industrial silicon, 10% fine silica powder, 15% silicon nitride, 3% magnesium oxide, the zirconium white of 4%, the bonding agent of 2.5% and 0.5% lanthanum trioxide; The preparation method of described bonding agent is: by mass percent get 20% xylogen, 2% carboxymethyl cellulose, 15% yellow starch gum, the urea of 1.5%, the paper fiber of 1.5% and 60% tap water, by above-mentioned paper fiber and from the beginning waterside mix and blend limit be heated to 50 DEG C, then continue to add xylogen, carboxymethyl cellulose, yellow starch gum Keep agitation, be slowly heated to 80 DEG C after namely stop heating, add urea after being cooled to room temperature and stir 5 ~ 8 minutes, latter standing more than 24 hours.First industrial silicon, SiO 2 superfine powder, silicon nitride, magnesium oxide, zirconium white and lanthanum trioxide are put into taper mixing equipment, mix 30 minutes, stand-by; Then silicon carbide sand and bonding agent are put into stirrer, stir 5 minutes; Previous mixed material is added stirrer, continues stirring 20 minutes, ageing mixture more than 36 hours after discharging; After discharging, gained mixture is pressed into adobe, and sends into Industrial Stoves and be heated to 120 DEG C, and continue baking more than 72 hours, furnace cooling; Gained adobe burnt till under nitrogen atmosphere protection, temperature is at 1300 DEG C, and the time is greater than 96 hours; After burning till, be cooled to room temperature, take out kiln.
Embodiment 4:
Get weight percent be 60% silicon carbide sand, 10% industrial silicon, 10% fine silica powder, 12% silicon nitride, 3.5% magnesium oxide, the zirconium white of 1%, the bonding agent of 3% and 0.5% lanthanum trioxide; The preparation method of described bonding agent is: by mass percent get 14% xylogen, 2% carboxymethyl cellulose, 12% yellow starch gum, the urea of 1.5%, the paper fiber of 0.5% and 70% tap water, by above-mentioned paper fiber and from the beginning waterside mix and blend limit be heated to 50 DEG C, then continue to add xylogen, carboxymethyl cellulose, yellow starch gum Keep agitation, be slowly heated to 80 DEG C after namely stop heating, add urea after being cooled to room temperature and stir 5 ~ 8 minutes, latter standing more than 24 hours.First industrial silicon, SiO 2 superfine powder, silicon nitride, magnesium oxide, zirconium white and lanthanum trioxide are put into taper mixing equipment, mix 30 minutes, stand-by; Then silicon carbide sand and bonding agent are put into stirrer, stir 5 minutes; Previous mixed material is added stirrer, continues stirring 20 minutes, ageing mixture more than 36 hours after discharging; After discharging, gained mixture is pressed into adobe, and sends into Industrial Stoves and be heated to 120 DEG C, and continue baking more than 72 hours, furnace cooling; Gained adobe burnt till under nitrogen atmosphere protection, temperature is at 1400 DEG C, and the time is greater than 96 hours; After burning till, be cooled to room temperature, take out kiln.
Embodiment 5:
Get weight percent be 80% silicon carbide sand, 5% industrial silicon, 3% fine silica powder, 10% silicon nitride, 0.5% magnesium oxide, the zirconium white of 0.9%, the bonding agent of 0.5% and 0.1% lanthanum trioxide; The preparation method of described bonding agent is: by mass percent get 15% xylogen, 3% carboxymethyl cellulose, 19% yellow starch gum, the urea of 1.5%, the paper fiber of 1.5% and 60% tap water, by above-mentioned paper fiber and from the beginning waterside mix and blend limit be heated to 50 DEG C, then continue to add xylogen, carboxymethyl cellulose, yellow starch gum Keep agitation, be slowly heated to 80 DEG C after namely stop heating, add urea after being cooled to room temperature and stir 5 ~ 8 minutes, latter standing more than 24 hours.First industrial silicon, SiO 2 superfine powder, silicon nitride, magnesium oxide, zirconium white and lanthanum trioxide are put into taper mixing equipment, mix 30 minutes, stand-by; Then silicon carbide sand and bonding agent are put into stirrer, stir 5 minutes; Previous mixed material is added stirrer, continues stirring 20 minutes, ageing mixture more than 36 hours after discharging; After discharging, gained mixture is pressed into adobe, and sends into Industrial Stoves and be heated to 120 DEG C, and continue baking more than 72 hours, furnace cooling; Gained adobe burnt till under nitrogen atmosphere protection, temperature is at 1450 DEG C, and the time is greater than 96 hours; After burning till, be cooled to room temperature, take out kiln.
Claims (6)
1. a silicon nitride complex phase silicon carbide brick, it is characterized in that, comprise the component of following weight percent: the silicon carbide sand of 43 ~ 80%, the industrial silicon of 5 ~ 19%, 3 ~ 15% fine silica powder, 10 ~ 20% silicon nitride, 0.5 ~ 3.5% transforming agent, the toughner of 0.5 ~ 4%, the bonding agent of 1.0 ~ 3.5% and 0.1 ~ 1% additive; Wherein, described transforming agent is carbon, titanium oxide, magnesium oxide, aluminum oxide or wherein multiple mixing, and the fineness < 44 μm of transforming agent; Described additive is lanthanum trioxide or cerium oxide; The preparation method of described bonding agent is: by mass percent get 10 ~ 30% xylogen, 0.5 ~ 3.5% carboxymethyl cellulose, 10 ~ 20% yellow starch gum, the urea of 0.5 ~ 1.5%, the paper fiber of 0.5 ~ 1.5% and 50 ~ 70% tap water, by above-mentioned paper fiber and from the beginning waterside mix and blend limit be heated to 50 DEG C, then continue to add xylogen, carboxymethyl cellulose, yellow starch gum Keep agitation, be slowly heated to 80 DEG C after namely stop heating, add urea after being cooled to room temperature and stir 5 ~ 8 minutes, latter standing more than 24 hours.
2. silicon nitride complex phase silicon carbide brick according to claim 1, it is characterized in that, described silicon carbide sand is that 1.6 ~ 3.5 μm, 0.8 ~ 1.6 μm and < 0.8 μm three kinds form by fineness, and the mass ratio of three is 1.5 ~ 4.5:1.5 ~ 3:1 ~ 2.
3. silicon nitride complex phase silicon carbide brick according to claim 1 and 2, is characterized in that, the fineness < of described industrial silicon 44 μm.
4. silicon nitride complex phase silicon carbide brick according to claim 1 and 2, is characterized in that, the fineness < of described fine silica powder 0.2 μm.
5. silicon nitride complex phase silicon carbide brick according to claim 1 and 2, is characterized in that, described toughner is zirconium white and fineness < 88 μm.
6. prepare the method for Claims 1 to 5 arbitrary silicon nitride complex phase silicon carbide brick, it is characterized in that, comprise the following steps:
(1) by recipe ratio, industrial silicon, fine silica powder, silicon nitride, transforming agent, toughner and additive are put into taper mixing equipment, mix 30 ~ 40 minutes, stand-by;
(2) take silicon carbide sand by formula ratio and stirrer put into by bonding agent, stir 5 ~ 8 minutes;
(3) material after mixing in step 1 is added stirrer, continue stirring 20 ~ 30 minutes, ageing mixture more than 36 hours after discharging;
(4) step 3 gained material is pressed into adobe;
(5) adobe is sent into Industrial Stoves and be heated to 120 DEG C, and continue baking more than 72 hours, furnace cooling;
(6) adobe of step 5 gained burnt till under nitrogen atmosphere protection, temperature is at 1100 ~ 1450 DEG C, and the time is greater than 96 hours;
(7) after step 6 is burnt till, be cooled to room temperature, take out kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004180.0A CN103833391B (en) | 2014-01-06 | 2014-01-06 | A kind of silicon nitride complex phase silicon carbide brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004180.0A CN103833391B (en) | 2014-01-06 | 2014-01-06 | A kind of silicon nitride complex phase silicon carbide brick and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103833391A CN103833391A (en) | 2014-06-04 |
| CN103833391B true CN103833391B (en) | 2016-03-02 |
Family
ID=50797335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410004180.0A Active CN103833391B (en) | 2014-01-06 | 2014-01-06 | A kind of silicon nitride complex phase silicon carbide brick and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103833391B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045522A (en) * | 2015-06-27 | 2016-10-26 | 湖北神雾热能技术有限公司 | Nonmetal material tray for refuse pyrolysis furnace rotating bed and preparation method thereof |
| CN105110803A (en) * | 2015-08-27 | 2015-12-02 | 苏州莱特复合材料有限公司 | Dry cylinder liner and powder metallurgy preparation method thereof |
| CN106673667A (en) * | 2016-12-14 | 2017-05-17 | 宜兴市华井科技有限公司 | Acid-resistant special ceramic and preparation method thereof |
| CN107162597A (en) * | 2017-06-21 | 2017-09-15 | 河南北星精细陶瓷有限公司 | A kind of formula of moulding by casting silicon nitride products based on silicon carbide 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 |
| CN109553403A (en) * | 2018-12-10 | 2019-04-02 | 新沂北美高科耐火材料有限公司 | A kind of novel silica brick and its production technology of high thermal shock |
| CN109970454A (en) * | 2019-03-20 | 2019-07-05 | 广东工业大学 | A kind of transition metal oxide inhibit silicon nitride phase transformation method and its silicon nitride ceramics obtained |
| CN111439999A (en) * | 2020-03-16 | 2020-07-24 | 泉州市泉石通智能科技有限公司 | Silicon nitride and silicon carbide combined refractory material and preparation method thereof |
| CN113185298B (en) * | 2021-04-16 | 2023-02-07 | 贵阳联合高温材料有限公司 | Microporous high-thermal-conductivity SiC-based connection and cladding lining product and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1482095A (en) * | 2003-05-09 | 2004-03-17 | 郑州大学 | Method for preparing bauxite substrate MgAION |
| CN101054301A (en) * | 2007-05-08 | 2007-10-17 | 北京通达耐火技术有限公司 | Method of preparing composite material of silicon nitride and silicon carbide by reverse reaction sintering |
| CN101654362A (en) * | 2009-08-31 | 2010-02-24 | 成都蜀冶新材料有限责任公司 | Silicon oxynitride combined carborundum high-temperature ceramic material and preparation method thereof |
| CN101830716A (en) * | 2010-05-11 | 2010-09-15 | 宜兴市钰玺窑业有限公司 | Ceramic complex phase material and preparation method thereof |
| CN102924066A (en) * | 2012-11-05 | 2013-02-13 | 刘贡友 | Siliceous composite plate, and preparation method and application thereof |
| FR2990940A1 (en) * | 2012-05-25 | 2013-11-29 | Saint Gobain Ct Recherches | REFRACTORY MIXTURE NOT MADE. |
-
2014
- 2014-01-06 CN CN201410004180.0A patent/CN103833391B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1482095A (en) * | 2003-05-09 | 2004-03-17 | 郑州大学 | Method for preparing bauxite substrate MgAION |
| CN101054301A (en) * | 2007-05-08 | 2007-10-17 | 北京通达耐火技术有限公司 | Method of preparing composite material of silicon nitride and silicon carbide by reverse reaction sintering |
| CN101654362A (en) * | 2009-08-31 | 2010-02-24 | 成都蜀冶新材料有限责任公司 | Silicon oxynitride combined carborundum high-temperature ceramic material and preparation method thereof |
| CN101830716A (en) * | 2010-05-11 | 2010-09-15 | 宜兴市钰玺窑业有限公司 | Ceramic complex phase material and preparation method thereof |
| FR2990940A1 (en) * | 2012-05-25 | 2013-11-29 | Saint Gobain Ct Recherches | REFRACTORY MIXTURE NOT MADE. |
| CN102924066A (en) * | 2012-11-05 | 2013-02-13 | 刘贡友 | Siliceous composite plate, and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 逆反应烧结制备铝电解槽用氮化硅—碳化硅复合材料;吴宏鹏 等;《硅酸盐学报》;20041231;第32卷(第12期);第1525页右栏倒数第1段，第1526页表1、图3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103833391A (en) | 2014-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103833391B (en) | A kind of silicon nitride complex phase silicon carbide brick and preparation method thereof | |
| CN102559960B (en) | Steel slag treating method | |
| CN103613962B (en) | A kind of infrared high emissivity coating material and preparation method | |
| CN104692820B (en) | What a kind of high temperature was fine and close does not burns composite brick and moulding process thereof | |
| JP5984599B2 (en) | Method for producing cement composition | |
| CN106966708A (en) | A kind of non-burning aluminum magnesia carbon brick and preparation method thereof | |
| CN101591187A (en) | High strength silicon nitride combined silicon carbide material and preparation method thereof | |
| CN102765949B (en) | Light-weight cordierite castable and preparation method thereof | |
| CN107311675B (en) | A kind of air brick and preparation method thereof by the preparation of industry byproduct aluminium chromium slag | |
| CN103601379B (en) | A kind of outer high calcium slag sand of throwing calcines phase-splitting grog technique | |
| CN103449803B (en) | Quick-drying anti-explosion refractory castable | |
| CN106866118A (en) | One kind does not burn high-purity magnesia-calcium brick and preparation method thereof | |
| CN101671184A (en) | Formula of high-aluminum bricks sintered at low temperature and production method thereof | |
| CN104030585B (en) | The method of clinker is made of sludge | |
| CN104387096A (en) | Corundum spinel unburned brick for smelting steel ladle and preparation method of corundum spinel unburned brick | |
| CN102134165B (en) | Furnace lining of ferrovanadium smelting furnace and preparation method thereof | |
| CN101863654A (en) | Bio-soluble ceramic fiber and preparation method thereof | |
| CN102924089A (en) | Method for preparing beta-sialon ceramic powders through using coal ash and kaolin | |
| CN100575464C (en) | Coal-saving synergist dedicated for shaft kiln | |
| CN102731124B (en) | Flint clay brick with acid and alkali resistance, wear resistance and thermal shock resistance as well as preparation method thereof | |
| CN108640634A (en) | A kind of method that blast furnace ash inorganic materials lightweight gas steams brick | |
| JP2010168256A (en) | Cement additive and cement composition | |
| CN107324824A (en) | A kind of BOF Hood tar combination magnesia-alumina brick and preparation method thereof | |
| JP2007169099A (en) | Fired body | |
| CN106977181A (en) | A kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick 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 |