CN1472174A - High-temperature fireproof bricks and preparing method thereof - Google Patents
High-temperature fireproof bricks and preparing method thereof Download PDFInfo
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- CN1472174A CN1472174A CNA031124496A CN03112449A CN1472174A CN 1472174 A CN1472174 A CN 1472174A CN A031124496 A CNA031124496 A CN A031124496A CN 03112449 A CN03112449 A CN 03112449A CN 1472174 A CN1472174 A CN 1472174A
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- refractory brick
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- zirconium diboride
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Abstract
A high-temp refractory brick used for the side wall of aluminium electrolyzer contains ZrB2, silicon nitride and silicon carbide. Its preparing process is also disclosed. Its advantages are high resistance to the corrosion of fused cryolite electrolyte and long service life.
Description
One, technical field: a kind of ZrB of containing that the present invention relates to use in a kind of high-temperature furnace body electrolytic aluminum groove
2The highiy refractory brick and the preparation method of the novel silicon nitride combined silicon carbide of (zirconium diboride) material.
Two, background technology: highiy refractory brick is insulation, a heat insulation and structured material commonly used in the high-temperature furnace body.Nearly all elevated temperature vessel and device interior all need supporting refractory materials to realize the work of the long-term stability of pyritous technical matters condition and protection steel construction body of heater.The pyrochemistry erosion-resisting characteristics of supporting refractory materials directly affects the life-span of refractory materials and the working life of high temperature service in the high temperature service.The refractory materials that uses at present in the electrolytic aluminum groove is carbon refractory brick and silicon nitride combined silicon carbide refractory brick.Carbon refractory brick is easy to be damaged the short problem of electrolytic aluminum groove cell body life-span that causes by high temperature oxidation.And the anti-sodium aluminum fluoride ionogen of silicon nitride combined silicon carbide refractory brick liquation erosional competency is not very satisfactory, usually take to increase the working life that the thickness of silicon nitride combined silicon carbide refractory brick prolongs silicon nitride combined silicon carbide refractory brick, but, the thickness that increases silicon nitride combined silicon carbide refractory brick has increased a lot of difficulties for the manufacturing process of silicon nitride combined silicon carbide refractory brick, nitrogen can not be penetrated into brick body inside effectively and generate silicon nitride bonded silicon mutually with silica flour generation nitrogenizing reaction, cause the inner silicon powder nitride of silicon nitride combined silicon carbide refractory brick incomplete easily, layering, sandwich, the not high quality problems of brick strength, and directly influence the result of use of silicon nitride combined silicon carbide refractory brick.
ZrB
2(zirconium diboride) material has good anti-sodium aluminum fluoride ionogen liquation erosional competency, have advantages such as fusing point height, steam force down, resistivity is low, hardness is high, thermal conductivity is good, in time below 1100 ℃ resistance of oxidation is preferably arranged, be suitable for very much the fire-resistant corrosion material of anti-sodium aluminum fluoride the in the electrolytic aluminum groove.But ZrB
2(zirconium diboride) material is the covalent linkage compound, and the fusing point height is difficult to be sintered to large compact material brick body.
Three, summary of the invention:
Purpose of the present invention is exactly the problems referred to above at carbon refractory brick that uses at present in the existing electrolytic aluminum groove and the existence of silicon nitride combined silicon carbide refractory brick, and a kind of ZrB of containing is provided
2The highiy refractory brick and the preparation method of the novel silicon nitride combined silicon carbide of (zirconium diboride) material.
Its technical scheme is:
(1) highiy refractory brick, comprise that the material of following weight percent is formed: silicon-carbide particle 70～80%, silica flour 10～20%, normal temperature wedding agent 2～10% is characterized in that: also comprise zirconium diboride 0.5%～20%.SiC content is greater than 98.5% in the described silicon-carbide particle, Fe
2O
3Less than 0.5%, grain graininess is 2.0～0.005mm (silicon carbide-containing particulate granularity contains less than 180 purpose carbide fine powder); Si is greater than 98.5% in the silica flour, Fe
2O
3Less than 0.5%, grain graininess is less than 180 purpose silica fine powders; The normal temperature wedding agent is that industrial dextrin or concentration are 10% polyvinyl alcohol solution; ZrB in the zirconium diboride material
2Content is greater than 96.5%, Fe
2O
3Less than 0.3%, granularity is between 80 order to 500 orders.
(2) method for preparing highiy refractory brick is: the material that mixes is pressed into adobe in brick pressing machine, brick pressing machine can be the large-scale vibrating pressure forming machine, also can be 400～1000 tons friction press; The silicon nitride combined silicon carbide firebrick billet that contains the zirconium diboride material of forming under 80 ℃～120 ℃ temperature dry 60 hours makes the moisture of adobe less than 0.8%; Be contained in the good adobe of drying in the nitriding furnace and feed content 99.99% high pure nitrogen and heat up continuously, heat-up rate is controlled at 40 ℃/hour, and when being warming up to 1450 ℃, insulation 50 hours is burnt till in nitrogenize under this temperature, gets final product after the cooling.Nitriding furnace can be electrically heated, also can be the Ma Fushi nitriding furnace of fuel oil or combustion gas.
Effect of the present invention is: add in silicon nitride combined silicon carbide refractory brick body at electrolytic aluminum groove side wall and contain ZrB
2(zirconium diboride) material, can improve the ability that the anti-sodium aluminum fluoride ionogen of silicon nitride combined silicon carbide refractory brick liquation corrodes and permeates greatly, suffer sodium aluminum fluoride ionogen liquation erosive speed in the electrolytic aluminum groove thereby effectively slow down silicon nitride combined silicon carbide refractory brick, reach obvious prolongation and contain ZrB
2The purpose in novel silicon nitride combined silicon carbide refractory brick work-ing life of (zirconium diboride) material.Simultaneously, avoided coming Mi to mend the defective in silicon nitride combined silicon carbide refractory brick work life-span, guaranteed to contain ZrB by the thickness that increases silicon nitride combined silicon carbide refractory brick
2The consistence and the stability of the novel silicon nitride combined silicon carbide refractory brick quality of (zirconium diboride) material.
Four, description of drawings: do not have
Five, embodiment:
Add ZrB
2(zirconium diboride) material (ZrB
2Greater than 96.5%, Fe
2O
3Less than 0.3%) embodiment be ZrB in the blending process of production technique
2(zirconium diboride) material is followed silicon-carbide particle, and (SiC is greater than 98.5%, Fe
2O
3Less than 0.5%, grain graininess is 2.0～0.005mm, contains less than 180 purpose carbide fine powder, and add-on is 75%) and silica flour (Si is greater than 98.5%, Fe
2O
3Less than 0.5%, grain graininess is less than 180 purpose silica fine powders, add-on is 15%) and add the normal temperature wedding agent (generally can adopt industrial dextrin or concentration is 10% polyvinyl alcohol solution, add-on be total batching quality 5%) add together to force to stir in the sand mill and mixed 20 minutes.Add ZrB
2The granularity of (zirconium diboride) material is added ZrB between 80 order to 500 orders
2The quantity of (zirconium diboride) material is 5% of total batching quality.
The material that mixes is pressed into adobe in brick pressing machine, brick pressing machine can be the large-scale vibrating pressure forming machine, also can be 400～1000 tons friction press.Forming contain ZrB
2The silicon nitride combined silicon carbide firebrick billet of (zirconium diboride) material under 110 ℃ temperature dry 60 hours makes the moisture of adobe less than 0.8%.Be contained in the good adobe of drying in the nitriding furnace and feed high pure nitrogen (N
2Greater than 99.99%) heat up continuously, nitriding furnace can be electrically heated, also can be the Ma Fushi nitriding furnace of fuel oil or combustion gas, heat-up rate is controlled at 40 ℃/hour, when being warming up to 1450 ℃ under this temperature nitrogenize burn till insulation 50 hours.What can obtain the present invention relates to after the cooling contains ZrB
2The novel silicon nitride combined silicon carbide refractory brick of (zirconium diboride) material.
Claims (5)
1, a kind of highiy refractory brick, comprise that the material of following weight percent is formed: silicon-carbide particle 70～80%, silica flour 10～20%, normal temperature wedding agent 2～10% is characterized in that: also comprise zirconium diboride 0.5%～20%.
2, highiy refractory brick according to claim 1 is characterized in that: in the described silicon-carbide particle SiC content greater than 98.5%, Fe
2O
3Less than 0.5%, grain graininess is 2.0～0.005mm; Si is greater than 98.5% in the silica flour, Fe
2O
3Less than 0.5%, grain graininess is less than 180 purpose silica fine powders; The normal temperature wedding agent is that industrial dextrin or concentration are 10% polyvinyl alcohol solution; ZrB in the zirconium diboride material
2Content is greater than 96.5%, Fe
2O
3Less than 0.3%, granularity is between 80 order to 500 orders.
3, highiy refractory brick according to claim 2 is characterized in that: the granularity of silicon-carbide particle contains less than 180 purpose carbide fine powder.
4, a kind of method for preparing aforesaid right requirement 1,2 or 3 described highiy refractory bricks, it is characterized in that: the material that mixes is pressed into adobe in brick pressing machine, brick pressing machine can be the large-scale vibrating pressure forming machine, also can be 400～1000 tons friction press; The silicon nitride combined silicon carbide firebrick billet that contains the zirconium diboride material of forming under 80 ℃～120 ℃ temperature dry 60 hours makes the moisture of adobe less than 0.8%; Be contained in the good adobe of drying in the nitriding furnace and feed content 99.99% high pure nitrogen and heat up continuously, heat-up rate is controlled at 40 ℃/hour, and when being warming up to 1450 ℃, insulation 50 hours is burnt till in nitrogenize under this temperature, gets final product after the cooling.
5, according to the method for the described highiy refractory brick of claim 4, it is characterized in that: nitriding furnace can be electrically heated, also can be the Ma Fushi nitriding furnace of fuel oil or combustion gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031124496A CN1472174A (en) | 2003-06-26 | 2003-06-26 | High-temperature fireproof bricks and preparing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031124496A CN1472174A (en) | 2003-06-26 | 2003-06-26 | High-temperature fireproof bricks and preparing method thereof |
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| CN1472174A true CN1472174A (en) | 2004-02-04 |
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ID=34152433
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|---|---|---|---|
| CNA031124496A Pending CN1472174A (en) | 2003-06-26 | 2003-06-26 | High-temperature fireproof bricks and preparing method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381399C (en) * | 2006-09-21 | 2008-04-16 | 武汉钢铁(集团)公司 | High thermal shock abrasive brick for dry quenched coke oven chute pillar and manufacture method |
| US20090035558A1 (en) * | 2005-10-28 | 2009-02-05 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Sintered ceramic product having a nitrogenous matrix with improved surface properties |
| CN102059736A (en) * | 2010-12-03 | 2011-05-18 | 伊川龙海科技实业有限公司 | Method for producing insulating bricks by utilizing aluminum-electrolyzed waste refractory materials |
| CN101068758B (en) * | 2004-11-29 | 2011-08-03 | 圣戈班欧洲设计研究中心 | Sintered refractory block based on silicon carbide with a silicon nitride bond |
| CN102228983A (en) * | 2011-06-17 | 2011-11-02 | 任灵成 | Electrolytic aluminum discharging pipe device with cleaning-free two-man ladle |
| US8097547B2 (en) | 2004-11-29 | 2012-01-17 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Sintered refactory material based on silicon carbide with a silicon nitride binder |
-
2003
- 2003-06-26 CN CNA031124496A patent/CN1472174A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101068758B (en) * | 2004-11-29 | 2011-08-03 | 圣戈班欧洲设计研究中心 | Sintered refractory block based on silicon carbide with a silicon nitride bond |
| US8076254B2 (en) | 2004-11-29 | 2011-12-13 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Sintered refractory block based on silicon carbide with a silicon nitride bond |
| US8097547B2 (en) | 2004-11-29 | 2012-01-17 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Sintered refactory material based on silicon carbide with a silicon nitride binder |
| EP1828077B1 (en) * | 2004-11-29 | 2016-03-23 | Saint-Gobain Centre de Recherches et d'Etudes Européen | Sintered refractory block based on silicon carbide with a silicon nitride bond |
| US20090035558A1 (en) * | 2005-10-28 | 2009-02-05 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Sintered ceramic product having a nitrogenous matrix with improved surface properties |
| CN100381399C (en) * | 2006-09-21 | 2008-04-16 | 武汉钢铁(集团)公司 | High thermal shock abrasive brick for dry quenched coke oven chute pillar and manufacture method |
| CN105254305A (en) * | 2008-02-08 | 2016-01-20 | 法商圣高拜欧洲实验及研究中心 | A sintered refactory material based on silicon carbide with a silicon nitride binder |
| US9321690B2 (en) | 2008-02-08 | 2016-04-26 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Sintered refractory material based on silicon carbide with a silicon nitride binder |
| EP2250141B2 (en) † | 2008-02-08 | 2019-04-17 | Saint-Gobain Centre de Recherches et d'Etudes Européen | Use of a sintered refractory material based on silicon carbide with a silicon nitride binder |
| CN102059736A (en) * | 2010-12-03 | 2011-05-18 | 伊川龙海科技实业有限公司 | Method for producing insulating bricks by utilizing aluminum-electrolyzed waste refractory materials |
| CN102059736B (en) * | 2010-12-03 | 2012-10-31 | 伊川龙海科技实业有限公司 | Method for producing insulating bricks by utilizing aluminum-electrolyzed waste refractory materials |
| CN102228983A (en) * | 2011-06-17 | 2011-11-02 | 任灵成 | Electrolytic aluminum discharging pipe device with cleaning-free two-man ladle |
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