CN1210226C - Refractory cast material for desulfurizing gunite - Google Patents
Refractory cast material for desulfurizing gunite Download PDFInfo
- Publication number
- CN1210226C CN1210226C CN 03118869 CN03118869A CN1210226C CN 1210226 C CN1210226 C CN 1210226C CN 03118869 CN03118869 CN 03118869 CN 03118869 A CN03118869 A CN 03118869A CN 1210226 C CN1210226 C CN 1210226C
- Authority
- CN
- China
- Prior art keywords
- molten iron
- spray gun
- powder
- refractory
- materials
- 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.)
- Expired - Fee Related
Links
Landscapes
- Ceramic Products (AREA)
Abstract
The present invention relates to refractory casting materials for a desulfurizing spray gun for the pretreatment of molten iron desulphurization, which belongs to the field of refractory materials for the pretreatment of molten iron desulphurization before converter steelmaking. The present invention provides two kinds of casting materials containing different components according to temperatures (equal to or above 4320 DEG C and below 1320 DEG C) of molten iron for the pretreatment of desulphurization. Aggregate for the cast materials is composed of flint clay, common electric melting mullite and andalusite. In order to improve the construction performance and use performance of the refractory casting materials, heat resistant steel fiber with proper quantity, a mineralizing agent, a water reducing agent and an antidetonator are added into the casting materials. The casting materials of the present invention have the advantages broad sources of raw materials, and low cost. The cast and prepared spray gun has long service life. The present invention is suitable for the integral casting of refractory operating linings of heating equipment and heating elements under thermal shock, and especially for the integral casting of refractory material covering layers of desulfurizing and dephosphorizing spray guns for the pretreatment of molten iron.
Description
Technical field
The present invention relates to a kind of refractory castable for desulfurizing spray gun, specifically a kind of spray gun refractory castable that is used for torpedo jar, iron ladle blowing desulfurization belongs to the preceding desulfurizing iron pre-treatment fire resisting material field of converter steelmaking.
Background technology
At present, the outer employed desulphurization spray gun structure of blowing desulfurization of molten iron stove different and different according to the molten iron structure of container that is adopted and sweetening agent kind before the smelter converter steelmaking both at home and abroad.For the molten iron spraying desulfurization spraying in the torpedo jar, although the sweetening agent kind difference of using, the desulphurization spray gun that is adopted all is the two spray orifice desulphurization spray guns of inverted T-shaped; For the blowing desulfurization of molten iron in the iron ladle, if sweetening agent is CaO system, Ca
2When C system or composite desulfurizing agent, the two spray orifices of single spray orifice and inverted T-shaped, three jet orifice structures bottom the spray gun structure that is adopted has, if adopt the pure metal magnesium desulfurizer, its desulphurization spray gun structure then has concentric single jet orifice structure of vaporization cell-type and non-vaporization cell-type.Go up disclosed " application of BL-2 refractory castable on the Baosteel molten iron desulfuring spray gun " as can be known by people such as Huang Xiaopeng at " Jiangsu metallurgy " 1990 (5), what the desulphurization spray gun refractory materials tectum of various different structures was adopted all is mullite corundum pouring materials, its main raw material have electrofused mullite (0～15mm and 180 orders), andaluzite (0～3mm), heat-resistant steel fiber, silicon powder, α-Al
2O
3Micro mist and pure calcium aluminate cement etc.This mould material exists in the practical application of desulfurization rifle easily peels off and short problem of desulfurization rifle life-span.As: the desulphurization spray gun average gun of using on the Wuhan Iron and Steel Plant three steelworks torpedo jars has only about 14 times/age, and average soak time is 450-550 minute/; The desulphurization spray gun average gun of using on the Shoudu Iron and Steel Co three steelworks torpedo jars only has about 10 times/age, and average soak time is 250-300 minute/.For this reason, Chinese scholars has been carried out extensive studies to refractory castable for desulfurizing spray gun, by the clear 61-99614 of the disclosed patent of Kawasaki, Japan system iron Co., Ltd. " molten milling given Commission processing イ Application ヅ ユ Network シ ヨ Application ラ Application ス " as can be known, desulphurization spray gun has with the main innovative approach of mould material: adopt the high electrofused mullite of aluminium content, corundum material to improve the fire performance of mould material, add silicon carbide, carbon materials, magnesia powder, magnesium-aluminium spinel to improve the erosion-resisting characteristics of mould material, adopt fritting column ceramic aggregate with the anti-erosion property that improves pouring layer etc.; Its weak point is all not obtain significant effect in actual applications, simultaneously, also causes the mould material cost sharply to rise, and has influenced the economic benefit that the molten iron spraying desulfurization spraying pre-treatment is produced.
Summary of the invention
The object of the present invention is to provide a kind of excellent property, the wide refractory castable for desulfurizing spray gun in low cost, starting material source, do not changing under spray gun structure and the working conditions, can make improve mean life of desulphurization spray gun 3～10 times/prop up.
The present invention according to desulfurization preprocessed molten iron actual temp, provides preprocessed molten iron temperature 〉=1320 ℃ and less than desulphurization spray gun mould material furnish component under 1320 ℃ of two kinds of conditions in order to achieve the above object.Its main raw material(s) has: flint clay, common electrofused mullite, andaluzite, heat-resistant steel fiber, silicon powder, α-Al
2O
3Micro mist, triphane, silicon carbide, pure calcium aluminate cement etc., used starting material are marketable material.
A kind of refractory castable for desulfurizing spray gun provided by the invention is characterized in that dividing two kinds by the preprocessed molten iron temperature with furnish component, is respectively by weight percentage:
A, preprocessed molten iron temperature 〉=1320 ℃ mould material: flint clay 25～45, common electrofused mullite 5～15, common electrofused mullite powder 1～10, andaluzite 15～35, compact alumina fine powder 5～10, a-Al
2O
3Micro mist 3～9, silicon powder 2～7, silicon carbide 1～5, pure calcium aluminate cement 4～8;
B, preprocessed molten iron temperature are less than 1320 ℃ mould material: flint clay 35～65, andaluzite 15～35, compact alumina fine powder 5～10, a-Al
2O
3Micro mist 3～9, silicon powder 2～7, silicon carbide 1～5, pure calcium aluminate cement 4～8;
Above-mentioned a or b furnish component, also need adding by weight, percentage ratio is: heat-resistant steel fiber 1～5, triphane 0～5, Aluctyl 0～0.5, metallic aluminium powder 0～0.5, tripoly phosphate sodium STPP 0～0.3, trimeric cyanamide 0～0.5; The granularity of furnish component is flint clay≤20mm, common electrofused mullite≤5mm, common electrofused mullite powder 100～325 orders, andaluzite≤3mm, compact alumina fine powder 300～400 orders, silicon carbide 100～325 orders, triphane 100～325 orders.
The present invention studies multiple desulphurization spray gun refractory materials tectum, found that refractory materials tectum tissue looseness, bonding strength are lower, illustrate that present employed mould material can not carry out good sintering under desulphurization spray gun use temperature condition, cause tectum tissue looseness, bonding strength low; Refractory materials tectum slag corrosion layer is very thin in actual applications for desulphurization spray gun, illustrates that corroding is not the major cause that causes the desulphurization spray gun breakage.Therefore only improve the work-ing life that the technical measures of desulphurization spray gun mould material fire performance and anti-slag corrosion performance can not obtain to improve spray gun.The present invention burns the back linear expansivity from sintering situation, workability, use properties and the adjustment mould material improved under the desulphurization spray gun use temperature condition, consider raw material sources and cost performance simultaneously, having designed with flint clay, common electrofused mullite and andaluzite is the aggregate raw material of mould material; For workability and the use properties of improving refractory castable, an amount of toughener, mineralizer, water reducer and detonation suppressor in mould material, have optionally been added.The toughener, the triphane that have designed heat-resistant steel fiber and be mould material are mineralizer, tripoly phosphate sodium STPP and trimeric cyanamide are that water reducer, metallic aluminium powder and Aluctyl are the refractory castable for desulfurizing spray gun of detonation suppressor.According to the principle of mould material raw material dense packing, carried out the design of mould material particles of aggregates grating and powder grating.
The present invention is directed to the insufficient and less practical situation of use back tectum corroding thickness of mould material tectum sintering under the desulphurization spray gun working conditions, is purpose to improve the sintering situation of desulphurization spray gun mould material under the blowing desulfurization condition with reducing production costs.From strengthening the sintering between mould material aggregate and powder, the sintering of mould material powder part and reduction material purity equal angles, studied cheap, it is wide to originate, the grating of flint clay that sintering temperature is lower and common electrofused mullite raw material and allocation ratio are to the influence of desulphurization spray gun with sintering situation between mould material aggregate and powder, and the triphane mineralizer partially sinters the influence of situation to the mould material powder, because common electric smelting mullite flame-proof performance is better than flint clay, so in the mould material of preprocessed molten iron temperature 〉=1320 ℃, contain common electrofused mullite, and do not contain common electrofused mullite in less than 1320 ℃ mould material in the preprocessed molten iron temperature.The present invention has opened up and has adopted the common raw material cheap, that the source is wide to produce the new approaches of desulphurization spray gun with mould material, has obtained the effect of significant prolongation desulphurization spray gun work-ing life and reduction desulphurization spray gun mould material production cost.
Refractory castable for desulfurizing spray gun of the present invention has following advantage:
1. to have selected flint clay and common electrofused mullite cheap, wide material sources according to the desulphurised hot metal temperature be main raw material in the present invention, reduced the production cost of mould material significantly.The used starting material of the present invention are commercially available, and the starting material source is wide.
2. refractory castable of the present invention sintering situation under working conditions is good, burns back intensity height.The present invention is by adding an amount of triphane sintering mineralizer to improve the sintering situation; Having selected lower flint clay of sintering temperature and common electrofused mullite is main aggregate, with the further sintering situation of improving between mould material aggregate and powder.
3. adopt spray gun excellent property that refractory castable of the present invention produces, with low cost, produce under the situation with application conditions not adjusting spray gun structure and other, improved mean life 3-10 time/prop up.
Embodiment
Desulphurization spray gun of the present invention is described in further detail in conjunction with the embodiments with mould material:
Embodiment 1: with a collection of desulphurization spray gun of refractory castable for desulfurizing spray gun batching cast preparation of preprocessed molten iron temperature of the present invention 〉=1320 ℃, the component of its batching percentage ratio is by weight counted:
Flint clay 29, wherein: 7 (8～20mm), 13 (5～8mm), 9 (3～5mm)
Common electrofused mullite 8, wherein: 6 (3～5mm), 1 (1～3mm), 1 (∠ 1mm)
Common electrofused mullite powder 3.5 (180 order)
Andaluzite 33, wherein: 15 (1～3mm), 18 (∠ 1mm)
Compact alumina fine powder 9 (325 order)
A-Al
2O
3Micro mist 5, silicon powder 5, silicon carbide 2 (180 order), pure calcium aluminate cement 5.5.
Add: heat-resistant steel fiber 2.5, triphane 4 (180 order), Aluctyl 0.5, tripoly phosphate sodium STPP 0.15, trimeric cyanamide 0.5.
The desulphurization spray gun of cast preparation is used at steelworks, and steelworks adopts the torpedo jar to carry out molten iron and carries, and molten iron temperature is all greater than 1320 ℃ during the blowing desulfurization pre-treatment.Under the situation of not adjusting desulphurization spray gun structure and other production and application conditions, the average gun of pouring into a mould the desulphurization spray gun practical application of preparation with the present invention is 18.5 times/age, than the former desulphurization spray gun average gun 14.5 times/Zhi Tigao in age that uses the same period 4 times/, simultaneously, the mould material cost descends 15%～30%.
Embodiment 2: with a collection of granular magnesium desulfurization spray gun of refractory castable for desulfurizing spray gun cast preparation of preprocessed molten iron temperature of the present invention 〉=1320 ℃, its furnish component percentage ratio is by weight counted:
Flint clay 39, wherein: 10 (8～20mm), 13 (5～8mm), 16 (3～5mm)
Common electrofused mullite 13, wherein: 8 (1～3mm), 5 (∠ 1mm)
Common electrofused mullite powder 6.5 (180 order)
Andaluzite 18, wherein: 8 (1～3mm), 10 (∠ 1mm)
Compact alumina fine powder 5 (325 order)
A-Al
2O
3Micro mist 6.5, silicon powder 6, silicon carbide 1 (180 order), pure calcium aluminate cement 5.
Add: heat-resistant steel fiber 3.5, triphane 1.5 (180 order), metallic aluminium powder 0.5, tripoly phosphate sodium STPP 0.3.
Use at steelworks, adopt 220 ton large-scale iron ladle short range molten iron to carry blowing desulfurization preprocessed molten iron temperature 〉=1320 ℃.Carrying out under the situation that the rifle core adjusts, be 70 times/average gun age of the desulfurization rifle practical application of cast preparation, significantly improves than having had former desulphurization spray gun average gun age of using the same period 12.5 times/, and simultaneously, the mould material cost descends 15%～30%.
Embodiment 3: with the refractory castable for desulfurizing spray gun of preprocessed molten iron temperature of the present invention less than 1320 ℃, cast has prepared a collection of desulphurization spray gun uses on the steelworks iron ladle, and the component of its batching percentage ratio is by weight counted:
Flint clay 50, wherein: 7 (8～20mm), 13 (5～8mm), 15 (3～5mm), 6 (1～3mm), 9 (∠ 1mm)
Andaluzite 20, wherein: 10 (1～3mm), 10 (∠ 1mm)
Compact alumina fine powder 7.5 (325 order)
A-Al
2O
3Micro mist 9, silicon powder 3, silicon carbide 3 (180 order), pure calcium aluminate cement 7.5.
Add: heat-resistant steel fiber 1.5, Aluctyl 0.3, metallic aluminium powder 0.3, trimeric cyanamide 0.5.
What cast prepared is the inverted T-shaped desulphurization spray gun of using on the steelworks iron ladle, and molten iron temperature is less than 1320 ℃ during desulfurization.Produce under the situation with application conditions not adjusting other, be 45 times/average gun age of desulphurization spray gun practical application, than the former desulphurization spray gun average gun 36 times/Zhi Tigao in age that uses the same period 9 times/, simultaneously, the mould material cost descends 20%～45%.
Mould material of the present invention is applicable to fire-resistant working lining integrated poured of Thermal Equipment and hot member under the rapid heat cycle working condition, and especially hot metal pretreatment is tectal integrated poured with desulfurization, dephosphorization spray gun refractory materials.
Claims (1)
1. a refractory castable for desulfurizing spray gun is characterized in that dividing two kinds by the preprocessed molten iron temperature with furnish component, is respectively by weight percentage:
A, preprocessed molten iron temperature 〉=1320 ℃ mould material: flint clay 25～45, common electrofused mullite 5～15, common electrofused mullite powder 1～10, andaluzite 15～35, compact alumina fine powder 5～10, a-Al
2O
3Micro mist 3～9, silicon powder 2～7, silicon carbide 1～5, pure calcium aluminate cement 4～8;
B, preprocessed molten iron temperature are less than 1320 ℃ mould material: flint clay 35～65, andaluzite 15～35, compact alumina fine powder 5～10, a-Al
2O
3Micro mist 3～9, silicon powder 2～7, silicon carbide 1～5, pure calcium aluminate cement 4～8;
Above-mentioned a or b furnish component, also need adding by weight, percentage ratio is: heat-resistant steel fiber 1～5, triphane 0～5, Aluctyl 0～0.5, metallic aluminium powder 0～0.5, tripoly phosphate sodium STPP 0～0.3, trimeric cyanamide 0～0.5; The granularity of furnish component is flint clay≤20mm, common electrofused mullite≤5mm, common electrofused mullite powder 100～325 orders, andaluzite≤3mm, compact alumina fine powder 300～400 orders, silicon carbide 100～325 orders, triphane 100～325 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03118869 CN1210226C (en) | 2003-04-01 | 2003-04-01 | Refractory cast material for desulfurizing gunite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03118869 CN1210226C (en) | 2003-04-01 | 2003-04-01 | Refractory cast material for desulfurizing gunite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1440952A CN1440952A (en) | 2003-09-10 |
| CN1210226C true CN1210226C (en) | 2005-07-13 |
Family
ID=27770455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03118869 Expired - Fee Related CN1210226C (en) | 2003-04-01 | 2003-04-01 | Refractory cast material for desulfurizing gunite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1210226C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659419A (en) * | 2012-03-13 | 2012-09-12 | 任健均 | High-temperature material used in carbon baking furnace |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341819C (en) * | 2005-10-28 | 2007-10-10 | 武汉钢铁(集团)公司 | Fast repairing material in use for flush type desulfurized for molten iron |
| CN100351209C (en) * | 2005-11-03 | 2007-11-28 | 武汉钢铁(集团)公司 | Refractory pouring material used for melten iron desulfur agitator |
| CN100337988C (en) * | 2006-04-29 | 2007-09-19 | 巩义市华西炉料有限公司 | Sillimanite andalusite micropowder combined refractory ball |
| CN100455545C (en) * | 2007-04-26 | 2009-01-28 | 武汉钢铁(集团)公司 | Slag antiseizing spraying material for desulfurization hot-metal bottle |
| CN101172847B (en) * | 2007-09-30 | 2010-06-09 | 巩义市好运祥耐材有限公司 | Castable for preparing high-temperature ceramic wear-resistant lining body |
| CN101914657B (en) * | 2008-03-14 | 2012-12-26 | 上海彭浦特种耐火材料厂 | Improvement of molten iron pretreatment elbow spray gun structure and optimization of used refractory material |
| CN101353260B (en) * | 2008-08-26 | 2011-06-22 | 武汉钢铁(集团)公司 | Steel fibre enhanced fire resistant refractory castable of desulphurization hot-metal tank edge |
| CN101445379B (en) * | 2008-12-19 | 2011-08-24 | 周建国 | Dedicated pouring material for cement kiln outlet and jetting coal pipe and preparation method thereof |
| CN101817689B (en) * | 2010-04-30 | 2012-02-29 | 武汉钢铁(集团)公司 | Refractory castable for molten iron pretreatment spray gun |
| CN101844933B (en) * | 2010-05-18 | 2012-12-26 | 上海彭浦特种耐火材料厂 | Refractory castable for desulfurizing spray gun for pretreating molten iron |
| CN101857446B (en) * | 2010-05-18 | 2012-11-21 | 武汉钢铁(集团)公司 | Refractory castable for desulfurization stirrer |
| CN102161593B (en) * | 2011-04-25 | 2013-03-13 | 武汉钢铁(集团)公司 | Light refractory castable material for heat insulation lining of cast steel plate (CPS) furnace roller |
| CN102276270A (en) * | 2011-06-24 | 2011-12-14 | 上海开宝耐火材料有限公司 | Refractory material used for lance for molten iron pretreatment and application thereof |
| CN102503466A (en) * | 2011-10-25 | 2012-06-20 | 浙江锦诚耐火材料有限公司 | Andalusite self-flow castable |
| CN102815954A (en) * | 2012-08-29 | 2012-12-12 | 秦皇岛北方管业有限公司 | High-performance heat-insulation wear-resistant material and preparation method thereof |
| CN105036754A (en) * | 2014-12-30 | 2015-11-11 | 江苏财经职业技术学院 | High-strength castable for prolonging service life of desulfuration spray gun and preparation method thereof |
| CN105819871A (en) * | 2016-03-15 | 2016-08-03 | 北京利尔高温材料股份有限公司 | Air blowing and slag removing spray gun for foundry ladle and preparation method thereof |
| CN106565254B (en) * | 2016-10-26 | 2020-04-03 | 武汉钢铁有限公司 | Refractory castable for preparing blowing-assisted slagging-off spray gun |
| CN106699208B (en) * | 2017-01-06 | 2019-06-25 | 武汉科技大学 | Molten iron desulfuring spray gun carbon fiber-reinforced castable refractory and preparation method thereof |
| CN106673683B (en) * | 2017-01-06 | 2019-06-25 | 武汉科技大学 | Molten iron desulfuring spray gun fiber composite toughening castable refractory and preparation method thereof |
| CN107032812A (en) * | 2017-05-25 | 2017-08-11 | 嘉兴新耐建材有限公司 | A kind of desulfurization rifle castable refractory |
| CN108129142A (en) * | 2017-11-23 | 2018-06-08 | 宜兴瑞泰耐火材料有限公司 | A kind of dehydrogenating propane device refractory material and preparation method thereof |
| CN111718199A (en) * | 2020-05-26 | 2020-09-29 | 襄阳聚力新材料科技有限公司 | Refractory heat-insulating ladle castable |
| CN112608138B (en) * | 2020-12-18 | 2023-04-25 | 安徽工业大学 | High oxidation resistance non-cement bonded Al 2 O 3 SiC-C refractory castable and preparation method thereof |
| CN114763302B (en) * | 2021-01-15 | 2023-02-14 | 宝山钢铁股份有限公司 | Refractory castable for lime spray gun and preparation method and application thereof |
| CN112939586B (en) * | 2021-04-14 | 2022-08-12 | 邯郸市鑫禧冶金新材料有限公司 | Production method of refractory material for desulfurization spray gun and refractory material |
| CN116161973A (en) * | 2022-12-29 | 2023-05-26 | 鞍山市和丰耐火材料有限公司 | Refractory castable for desulfurization spray gun |
-
2003
- 2003-04-01 CN CN 03118869 patent/CN1210226C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659419A (en) * | 2012-03-13 | 2012-09-12 | 任健均 | High-temperature material used in carbon baking furnace |
| CN102659419B (en) * | 2012-03-13 | 2014-07-09 | 任健均 | High-temperature material used in carbon baking furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1440952A (en) | 2003-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1210226C (en) | Refractory cast material for desulfurizing gunite | |
| CN100351209C (en) | Refractory pouring material used for melten iron desulfur agitator | |
| CN101817689B (en) | Refractory castable for molten iron pretreatment spray gun | |
| CN101857446B (en) | Refractory castable for desulfurization stirrer | |
| Ewais | Carbon based refractories | |
| CN102757241B (en) | Stemming and purpose thereof | |
| CN104591752B (en) | Burnt magnesia spinel brick for RH refining furnace dip pipe and circulating pipe and preparation method thereof | |
| CN101113098A (en) | Aluminum oxide electric furnace cover pouring material and preparation method thereof | |
| CN101337821A (en) | Low density fire resistant pouring material for KR stirring paddle | |
| CN105819875B (en) | Refractory castable for Ausmelt copper smelting furnace flue and preparation method thereof | |
| KR930005250B1 (en) | Refractory containing aluminium nitride oxide refractory for sliding nozzle and nozzle for continuously casting | |
| CN114195529B (en) | High-strength magnesia refractory mortar for refining ladle | |
| US5506181A (en) | Refractory for use in casting operations | |
| EP0020022B1 (en) | Plastic refractories with fused alumina-chrome grog | |
| CN107617732B (en) | A kind of refractory material liner body and preparation method thereof for ladle | |
| MXPA05001984A (en) | Method for manufacturing immersion nozzle less susceptible to deposition of alumina for use in continuous casting. | |
| JP2022161032A (en) | Castable refractory and molten steel ladle | |
| ITMI950206A1 (en) | REFRACTORY CERAMIC MASS AND ITS USE | |
| JP2827375B2 (en) | Coating method for kiln interior | |
| KR20050006119A (en) | Unshaped refractory composition | |
| CN113845353A (en) | Transition brick layer for ladle wall of ladle working lining | |
| FI85366B (en) | ANVAENDNING AV EN FORMBAR, ELDFAST, SINTERMAGNESITBASERAD MASSA SOM EN TIXOTROPISK, SJAELVHAERDANDE VIBRATIONSMASSA. | |
| JPS5834423B2 (en) | Basic refractory composition | |
| JP2827383B2 (en) | Coating method for kiln interior | |
| KR100328049B1 (en) | Dry ramming material refractory composition for repairing road of electric furnace |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050713 Termination date: 20140401 |