CN1410195A - Carbon less and silicon less nozzle for clean steel and its making method - Google Patents
Carbon less and silicon less nozzle for clean steel and its making method Download PDFInfo
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- CN1410195A CN1410195A CN 02135760 CN02135760A CN1410195A CN 1410195 A CN1410195 A CN 1410195A CN 02135760 CN02135760 CN 02135760 CN 02135760 A CN02135760 A CN 02135760A CN 1410195 A CN1410195 A CN 1410195A
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- less
- carbon
- silicon
- nozzle
- clean steel
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Abstract
A non-carbon and non-silicon sprue for casting high-purity steel has a liner layer not containing C and Si, and is prepared from Mg-Al spinel (60-90 wt.%), light burnt Al2O3 (2-20), graphite (1-6) sinter assistant (2-6) and phenolic resin (5-8) through mixing, grinding, isostatic pressure shaping while combining it with the main body and sintering. Its advantages are no blocking, long service life and high productivity.
Description
Affiliated technical field
The present invention relates to a kind of refractory materials, be specifically related to a kind of casting molten steel water nozzle, more specifically to a kind of carbon less and silicon less nozzle for clean steel.The present invention relates to the making method of above-mentioned carbon less and silicon less nozzle for clean steel simultaneously.
Background technology
In the molten steel casting process of steelmaking process, because oxidation, place, the mouth of a river is easy to precipitate A l
2O
3, Al
2O
3Stop up the mouth of a river after the precipitation, the service life at the mouth of a river is short, has reduced production efficiency.For addressing the above problem, manufacturer has proposed the multiple technologies scheme, wherein as 1, argon-blowing method.Although argon-blowing method can effectively prevent Al
2O
3Stop up, but cause the steel deterioration from the gas that submersed nozzle sprays into, such as the increase of plate defective etc.2, adopt CaO-ZrO
2One C material is as anti-blocking liner, and its principle is to utilize Al
2O
3Nanocluster and CaO-ZrO
2Reaction forms the erosion that eutectic produces between-C, can prevent Al
2O
3The generation of precipitation.Although said method has solved mouth of a river Al to a certain extent
2O
3The problem that precipitation is stopped up, but the raising that requires along with production efficiency, the casting time of molten steel needs longer.Existing method can not satisfy the requirement that production efficiency improves.Although CaO-ZrO
2-C the mouth of a river is very effective to the short time direct casting, but along with the growth of time casting efficient step-down, mainly be that the CaO of mouth of a river internal layer consumes gradually, reduce, and the CaO of liner inside is difficult to diffuse out and Al
2O
3Form low molten thing, cause the rear mouth of a river of long-time casting to be stopped up easily, affected equally blocking-proof result.
Summary of the invention
The present invention overcomes the existing casting mouth of a river and stops up easily, and service life is short, thereby affects the shortcoming of production efficiency, and a kind of carbon less and silicon less nozzle for clean steel is provided, and this mouth of a river should not be stopped up in the molten steel casting process, long service life, production efficiency height.
The present invention provides the making method of above-mentioned carbon less and silicon less nozzle for clean steel simultaneously.
The invention discloses a kind of carbon less and silicon less nozzle for clean steel, comprise mouth of a river body, it is characterized in that: the carbon less and silicon less inner liner is set in the body of the mouth of a river, and described carbon less and silicon less inner liner is made by following method and is obtained: will comprise that percentage by weight is respectively 60～90% magnesium aluminate spinels; 2～20% light-burned Al
2O
31～6% graphite; 2～6% sintering aids; 5～8% phenolic resins mixings grind mud, with mouth of a river body, the compound isostatic compaction of using of slag line, obtain carbon less and silicon less nozzle for clean steel behind the sintering.
In the technical scheme at the above-mentioned making mouth of a river, component magnesium aluminate spinel coefficient of thermal expansion is little, and permeability resistance is good and the molten steel wetability is poor, is difficult for and Al
2O
3React; Light-burned Al
2O
3Improve the intensity under the liner high temperature; Graphite has improved the processability of liner; Sintering aid mainly utilizes its liquid phase at high temperature, relaxes thermal stress, improves thermal shock resistance; The binding agent of phenolic resins during as compression moulding.Sinter the liner at the mouth of a river behind above-mentioned each component mixing stone roller mud into, the intensity height of liner, no hole enlargement does not have dross substantially in the molten steel casting process, and mouth of a river long service life has improved production efficiency accordingly.
The technology at the above-mentioned making casting mouth of a river is common process, and the component of above-mentioned making liner is ground mud through mixing, with mouth of a river body, the compound isostatic pressing of using of slag line, can obtain carbon less and silicon less nozzle behind the sintering in 1100～1300 ℃ of nonoxidizing atmospheres of conventional temperature.
Usually the preferred group of each component of making mouth of a river carbon less and silicon less inner liner is proportional is: 70～80% magnesium aluminate spinels; 5～15% light-burned Al
2O
33～6% graphite; 4～6% sintering aids; 7～8% phenolic resins.
Described sintering aid is one or more in norbide, feldspar, clay powder, the glass frit.
The thickness of common described carbon less and silicon less air retaining wall is 3～7mm.
The present invention after the body of carbon less and silicon less nozzle for clean steel arranges the carbon less and silicon less inner liner, the intensity height of liner, no hole enlargement does not have Al substantially in the molten steel casting process
2O
3Dross, mouth of a river long service life has improved production efficiency accordingly.
Embodiment
Embodiment 1
A kind of carbon less and silicon less nozzle for clean steel comprises mouth of a river body, and the carbon less and silicon less inner liner is set in the body of the mouth of a river, and described carbon less and silicon less inner liner is made by following method and obtained: percentage by weight is respectively 85% magnesium aluminate spinel; 2% light-burned Al
2O
31% graphite; 2% clay powder; 5% boron carbide; After 5% phenolic resins mixes, namely get anti-blocking liner, itself and alumina-carbon material, zirconium material with carbon element is compound by 100～150Mpa cold isostatic compaction, in 1100～1300 ℃ of nonoxidizing atmospheres, burn till, namely make submersed nozzle.Anti-blocking effective after use by the submersed nozzle that this prescription is made.Use the rear inner lining smooth surface not have the dross phenomenon, 10 hours work-ing life.
Embodiment 2
A kind of carbon less and silicon less nozzle for clean steel, comprise the mouth of a river body that alumina-carbon material, zirconium carbon material are made, the carbon less and silicon less air retaining wall is set in the body of the mouth of a river, and described carbon less and silicon less air retaining wall is made by following method and is obtained: weight percent is respectively 65% magnesium-aluminium spinel; 15% light-burned Al
2O
35% graphite; 5% clay powder; 2% feldspar; 3% clay powder; After 5% resol mixes, promptly get anti-blocking liner, with itself and alumina-carbon material, the zirconium carbon material is compound after the 150Mpa cold isostatic compaction burns till, and promptly makes submerged nozzle in 1200 ℃ of nonoxidizing atmospheres.Anti-blocking effective after use by the submersed nozzle that this prescription is made.Use the rear inner lining smooth surface not have the dross phenomenon, 10 hours work-ing life.
Embodiment 3
A kind of carbon less and silicon less nozzle for clean steel, comprise the mouth of a river body that alumina-carbon material, zirconium material with carbon element are made, the carbon less and silicon less inner liner is set in the body of the mouth of a river, and described carbon less and silicon less inner liner is made by following method and is obtained: percentage by weight is respectively 70% magnesium aluminate spinel; 15% light-burned Al
2O
34% graphite; 2% boron carbide, 1% feldspar, 2% glass frit; After 6% phenolic resins mixes, namely get anti-blocking liner, itself and alumina-carbon material, zirconium material with carbon element is compound by the 150Mpa cold isostatic compaction, in 1300 ℃ of nonoxidizing atmospheres, burn till, namely make submersed nozzle.Anti-blocking effective after use by the submersed nozzle that this prescription is made.Use the rear inner lining smooth surface not have the dross phenomenon, 10 hours work-ing life.
Embodiment 4
A kind of carbon less and silicon less nozzle for clean steel, comprise the mouth of a river body that alumina-carbon material, zirconium material with carbon element are made, the carbon less and silicon less inner liner is set in the body of the mouth of a river, and described carbon less and silicon less inner liner is made by following method and is obtained: percentage by weight is respectively 70% magnesium aluminate spinel; 15% light-burned AL
2O
33% graphite; 3% feldspar, 2% glass frit; After 7% phenolic resins mixes, namely get anti-blocking liner, itself and alumina-carbon material, zirconium material with carbon element is compound by the 150Mpa cold isostatic compaction, in 1300 ℃ of nonoxidizing atmospheres, burn till, namely make submersed nozzle.Anti-blocking effective after use by the submersed nozzle that this prescription is made.Use the rear inner lining smooth surface not have the dross phenomenon, 10 hours work-ing life.
Embodiment 5
A kind of preparation method of carbon less and silicon less nozzle for clean steel comprises the following order step: percentage by weight is respectively 65% magnesium aluminate spinel; 20% light-burned Al
2O
33% graphite; 5% glass frit; After 7% phenolic resins mixes, namely get anti-blocking liner, itself and alumina-carbon material, zirconium material with carbon element is compound by the 150Mpa cold isostatic compaction, in 1250 ℃ of nonoxidizing atmospheres, burn till, namely make submersed nozzle.Anti-blocking effective after use by the submersed nozzle that this prescription is made.Use the rear inner lining smooth surface not have the dross phenomenon, 10 hours work-ing life.
Claims (8)
1, a kind of carbon less and silicon less nozzle for clean steel, comprise mouth of a river body, it is characterized in that: the carbon less and silicon less inner liner is set in the body of the mouth of a river, and described carbon less and silicon less inner liner is made by following method and is obtained: will comprise that percentage by weight is respectively 60～90% magnesium aluminate spinels; 2～20% light-burned Al
2O
31～6% graphite; 2～6% sintering aids; 5～8% phenolic resins mixings grind mud, with mouth of a river body, the compound isostatic compaction of using of slag line, obtain carbon less and silicon less nozzle for clean steel behind the sintering.
2, carbon less and silicon less nozzle for clean steel according to claim 1 is characterized in that: the preferred group of each component of making carbon less and silicon less inner liner is proportional to be: 70～80% magnesium aluminate spinels; 5～15% light-burned Al
2O
33～6% graphite; 4～6% sintering aids; 7～8% phenolic resins.
3, carbon less and silicon less nozzle for clean steel according to claim 1 is characterized in that: described sintering aid is one or more in norbide, feldspar, clay powder, the glass frit.
4, carbon less and silicon less nozzle for clean steel according to claim 1 is characterized in that: the thickness of described carbon less and silicon less air retaining wall is 3～7mm.
5, a kind of preparation method of carbon less and silicon less nozzle for clean steel comprises the following order step: will comprise that percentage by weight is respectively 60～90% magnesium aluminate spinels; 2～20% light-burned Al
2O
31～6% graphite; 2～6% sintering aids; 5～8% phenolic resins mixings grind mud, as mouth of a river carbon less and silicon less inner liner and mouth of a river body, the compound isostatic compaction of using of slag line, obtain carbon less and silicon less nozzle for clean steel behind the sintering.
6, the preparation method of carbon less and silicon less nozzle for clean steel according to claim 5 is characterized in that: proportional being respectively of preferred group of making each component of carbon less and silicon less inner liner: 70～80% magnesium aluminate spinels; 5～15% light-burned Al
2O
33～6% graphite; 4～6% sintering aids; 7～8% phenolic resins.
7, the making method of carbon less and silicon less nozzle for clean steel according to claim 5 is characterized in that: described sintering aid is one or more in norbide, feldspar, clay powder, the glass frit.
8, the making method of carbon less and silicon less nozzle for clean steel according to claim 5 is characterized in that: the thickness of described carbon less and silicon less air retaining wall is 3～7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02135760 CN1201886C (en) | 2002-11-02 | 2002-11-02 | Carbon less and silicon less nozzle for clean steel and its making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02135760 CN1201886C (en) | 2002-11-02 | 2002-11-02 | Carbon less and silicon less nozzle for clean steel and its making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1410195A true CN1410195A (en) | 2003-04-16 |
| CN1201886C CN1201886C (en) | 2005-05-18 |
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ID=4748340
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02135760 Expired - Fee Related CN1201886C (en) | 2002-11-02 | 2002-11-02 | Carbon less and silicon less nozzle for clean steel and its making method |
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|---|---|
| CN (1) | CN1201886C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439279C (en) * | 2007-04-30 | 2008-12-03 | 山东中齐耐火材料有限公司 | Formula of caput of composition type stopper |
| CN101118186B (en) * | 2007-08-30 | 2010-08-04 | 聚光科技(杭州)股份有限公司 | High-temperature continuously temperature measuring system and manufacturing method of temperature measurement pipe |
| CN101704099B (en) * | 2009-12-09 | 2011-07-20 | 山东东耐高温材料有限公司 | Tundish quick-replaceable sewage outlet used for metal continuous casting plate blank |
| CN102294470A (en) * | 2011-08-23 | 2011-12-28 | 湖州永联耐火材料有限公司 | Anti-blocking type long water gap bowl part |
| CN102335738A (en) * | 2010-07-26 | 2012-02-01 | 宝山钢铁股份有限公司 | Composite submerged nozzle and manufacturing method thereof |
| CN105127409A (en) * | 2015-09-15 | 2015-12-09 | 辽宁科技大学 | Preheating-free long nozzle capable of being repeatedly used and preparing method thereof |
| CN112759381A (en) * | 2020-12-31 | 2021-05-07 | 马鞍山利尔开元新材料有限公司 | Carbon-free ladle down nozzle and preparation method thereof |
-
2002
- 2002-11-02 CN CN 02135760 patent/CN1201886C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439279C (en) * | 2007-04-30 | 2008-12-03 | 山东中齐耐火材料有限公司 | Formula of caput of composition type stopper |
| CN101118186B (en) * | 2007-08-30 | 2010-08-04 | 聚光科技(杭州)股份有限公司 | High-temperature continuously temperature measuring system and manufacturing method of temperature measurement pipe |
| CN101704099B (en) * | 2009-12-09 | 2011-07-20 | 山东东耐高温材料有限公司 | Tundish quick-replaceable sewage outlet used for metal continuous casting plate blank |
| CN102335738A (en) * | 2010-07-26 | 2012-02-01 | 宝山钢铁股份有限公司 | Composite submerged nozzle and manufacturing method thereof |
| CN102335738B (en) * | 2010-07-26 | 2013-06-19 | 宝山钢铁股份有限公司 | Composite submerged nozzle and manufacturing method thereof |
| CN102294470A (en) * | 2011-08-23 | 2011-12-28 | 湖州永联耐火材料有限公司 | Anti-blocking type long water gap bowl part |
| CN102294470B (en) * | 2011-08-23 | 2013-08-28 | 湖州永联耐火材料有限公司 | Anti-blocking type long water gap bowl part |
| CN105127409A (en) * | 2015-09-15 | 2015-12-09 | 辽宁科技大学 | Preheating-free long nozzle capable of being repeatedly used and preparing method thereof |
| CN112759381A (en) * | 2020-12-31 | 2021-05-07 | 马鞍山利尔开元新材料有限公司 | Carbon-free ladle down nozzle and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1201886C (en) | 2005-05-18 |
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