CN101607832A - A kind of diffuse type gas permeable brick - Google Patents
A kind of diffuse type gas permeable brick Download PDFInfo
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- CN101607832A CN101607832A CNA2008101270799A CN200810127079A CN101607832A CN 101607832 A CN101607832 A CN 101607832A CN A2008101270799 A CNA2008101270799 A CN A2008101270799A CN 200810127079 A CN200810127079 A CN 200810127079A CN 101607832 A CN101607832 A CN 101607832A
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Abstract
The present invention relates to a kind of gas permeable brick, particularly relate to a kind of diffuse type gas permeable brick that adopts pouring forming technology to make.Material of the present invention is formed and is comprised body material, micro mist, swelling agent, wedding agent, dispersion agent, microvesicle air entrapment agent and suds-stabilizing agent, wherein the microvesicle air entrapment agent adopts rosin ester class air entrapment agent, suds-stabilizing agent adopts non-ionic type amides suds-stabilizing agent, and dispersion agent adopts organic class non-ionic type water reducer.Do not recommend in the material of the present invention to use inorganic salts ionic water reducer, do not recommend to use acid, slightly acidic retardant.Base substrate behind the material forming of the present invention need carry out the high temperature maintenance immediately, to quicken the base substrate sclerosis.Diffuse type gas permeable brick of the present invention adopts pouring forming technology, and technological process is simple, and facility investment is little, and the production efficiency height not only can be made the diffuse type gas permeable brick of regular shape, and can make large scale special-shaped diffuse type gas permeable brick; Make the even air hole distribution in the product, permeability is stable, and anti-molten steel scouring, erosional competency are strong, and antistrip performance is good.
Description
Affiliated technical field
The present invention relates to a kind of gas permeable brick, particularly relate to a kind of diffuse type gas permeable brick that adopts pouring forming technology to make.
Background technology
Feed the gas stirring metal liquid in molten metal container, quicken to realize metallurgical process, evenly the temperature and the chemical constitution of metal liquid promote inclusion removal or control inclusion morphology, are the technology that modern metallurgy industry generally adopts.Being blown into gas in molten metal container can obtain by dual mode, a kind of is to adopt air blow gun, insert the metal liquid operation of blowing from container top, a kind of is to adopt bottom-blown air brick, from container bottom gas is sent in the container, wherein the bottom-blown air brick mode is more cheap, convenient, practical, thereby is widely used.
According to gas permeable brick cored structure and air feed characteristics, bottom-blown air brick is broadly divided into four types: diffuse type, slit-type, brickwork joint is combined and straight-through pass.Wherein disperse a large amount of little pores that distributing in the diffuse type gas permeable brick under low pressure can form tiny bubble population, and liquid is had mixing effect preferably, are one of gas permeable bricks that is widely used at present.
Tradition diffuse type gas permeable brick is according to not tightly packed principle, adopt ramming, compacting or etc. mode moulding such as static pressure.Ramming process in fact seldom adopts because moulding process is wayward, and the diversity ratio between the base substrate individuality is bigger; At present the technology of comparative maturity is semidrying compression moulding and isostatic pressing, and semidrying compression moulding is suitable for making those shape comparison rule, gas permeable brick that the brick body is not too big, is not suitable for large scale special-shaped brick; Isostatic pressing is according to Bath card principle, to liquid pressurization, by the rubber Membrane cover pressure is passed to material equably, can obtain each to uniform base substrate, but this technological equipment investment is big, cost is high, yield poorly, the process complexity.
Yet, some use the position to require to obtain large scale special-shaped diffuse type gas permeable brick, its usage quantity is big and price comparison is low, as the continuous casting tundish Argon that is used for iron and steel metallurgical industry adopts traditional moulding process to be not suitable for making such gas permeable brick with the diffuse type gas permeable brick etc.
Summary of the invention
The present invention proposes a kind of method that adopts pouring forming technology to make the diffuse type gas permeable brick.
Material of the present invention is formed and is comprised body material, micro mist, swelling agent, wedding agent, water reducer, microvesicle air entrapment agent and suds-stabilizing agent, and according to the body material difference, the micro mist that is adopted, swelling agent and wedding agent are different:
(1) if body material is an aluminum raw material, as corundum, alumina etc., micro mist can adopt silicon powder, activated alumina micro mist and their mixture; Swelling agent preferentially adopts kyanite, andaluzite, sillmanite and their mixture; Wedding agent adopts pure calcium aluminate cement or ρ-aluminum oxide wedding agent;
(2) if body material is a magnesia raw material, as magnesia, peridotites etc., micro mist adopts silicon powder, can add the activated alumina micro mist; Swelling agent adopts aluminum raw material, as corundum, alumina etc.; Wedding agent can adopt ρ-aluminum oxide wedding agent, or adopts the MgO-SiO that forms between silicon powder and the magnesia
2-H
2O is the gel combination;
One of core technology of the present invention is air entrapment agent, suds-stabilizing agent and water reducer, and its kind and consumption have determined the formation of bubble in the mould material, quantity, size and stable, and be specific as follows:
The microvesicle air entrapment agent is selected rosin ester class air entrapment agent for use, and its typical index is: pH value 7～8, surface tension (30～40) * 10
-5N/cm, foam degree 10～30%; The preferred weight ratio of air entrapment agent is 0.8～1.5% in the mould material.
Suds-stabilizing agent is selected non-ionic type amides suds-stabilizing agent for use, and its typical index is: amine value 120～140mgKOH/g, pH value 9～10; The preferred weight ratio of suds-stabilizing agent is 1.2～2.0% in the mould material.
No matter body material is aluminium matter or magnesia raw material, and water reducer is all selected organic class non-ionic type water reducer for use, and preferred water reducer is FND or ADS, does not recommend to use inorganic salts ionic water reducer, as tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 etc.;
Except that microvesicle air entrapment agent and suds-stabilizing agent, the proportioning of unclassified stores is not done special requirement, can casting as long as satisfy, base substrate has certain intensity, 1450 ℃～1600 ℃ to burn till the remaining line velocity of variation in back and be controlled at-0.5～+ 0.5%.
Two of core technology of the present invention is, during forming, do not recommend material to use acid, slightly acidic retardant, as tartrate, citric acid etc., require mould material to begin to be controlled within one hour to the moulding required time that finishes from adding the water wet mixing, the preferred time is 20～30 minutes.
Three of core technology of the present invention is, the base substrate sclerosis is quickened in the high temperature maintenance immediately of the base substrate after the moulding, and curing temperature is 30 ℃～90 ℃, and preferred curing temperature is 50 ℃～70 ℃.
Diffuse type gas permeable brick of the present invention adopts pouring forming technology, and technological process is simple, and facility investment is little, and the production efficiency height not only can be made the diffuse type gas permeable brick of regular shape, and can make large scale special-shaped diffuse type gas permeable brick; Make the even air hole distribution in the product, permeability is stable, and anti-molten steel scouring, erosional competency are strong, and antistrip performance is good.
Embodiment
Following indefiniteness embodiment is used to explain the present invention, but not as a limitation of the invention.
1, batching is formed by weight percentage:
(1) with the aluminum raw material is body material
Plate diamond spar 67%, kyanite 14%, activated alumina micro mist 5%, pure calcium aluminate cement 10%, microvesicle air entrapment agent 1.2%, suds-stabilizing agent 1.8%, water reducer ADS1 1%.
(2) with the magnesia raw material be body material
Middle-grade magnesite clinker 75%, plate diamond spar 13%, activated alumina micro mist 3%, ρ-aluminum oxide wedding agent 5%, silicon powder 1%, microvesicle air entrapment agent 1%, suds-stabilizing agent 1.7%, water reducer FDN-30000.3%.
2, manufacturing process and method for testing performance
After above batching composition batching, in stirrer, force to stir 3 minutes, add an amount of clean tap water then, wet mixing 3 minutes, adopt the vibrating casting molding mode to make 40mm * 40mm * 160mm galley proof, the base substrate after the moulding is put into 50 ℃～70 ℃ the baking oven maintenance demoulding in 24 hours.Then according to anti-folding folding strength, volume density and the line velocity of variation of related standards test samples after 110 ℃, 24 hours and thermal treatment in 1500 ℃, 3 hours, the distribution of Autopore pore detector measurement air vent aperture is adopted in the size and the distribution of the micro-structural feature of sample and pore after the employing scanning electron microscopic observation analysis thermal treatment in 1500 ℃, 3 hours.
3, performance index representative value
Two kinds of anti-folding of scheme folding strengths, volume density, line velocity of variation and air flows are as shown in the table.
| With the aluminum raw material is body material | With the magnesia raw material is body material | |
| Folding strength after 110 ℃ of bakings | ??6.1MPa | ??5.4MPa |
| Volume density after 110 ℃ of bakings | ??2.69g/cm 3 | ??2.62g/cm 3 |
| Apparent porosity after 110 ℃ of bakings | ??32％ | ??28％ |
| Folding strength after 1500 ℃ of burnings | ??11MPa | ??9MPa |
| Line changes after 1500 ℃ of burnings | ??-0.18％ | ??+0.35％ |
| Apparent porosity after 1500 ℃ of burnings | ??31％ | ??33％ |
| Air flow (pressure difference 0.05MPa) | ??12.9L/min | ??14.3L/min |
Accompanying drawing 1 is typical gas cell distribution curve, and X-coordinate is a hole diameter among the figure, unit: μ m, ordinate zou are the percentage by volume of pore, unit: %, and I is 110 ℃, the 24 hours samples after the baking among the figure, II is 1500 ℃, the 3 hours samples after the thermal treatment.
Accompanying drawing 2 is for being that the prescription of body material burnt back amplification 100 and shows the microstructure photo through 1500 ℃, 3 hours with the aluminum raw material.
From accompanying drawing 1 as seen, hole diameter becomes bimodal distribution, and one of them peak is the small pore less than 5 μ m, its quantity accounts for about 30% of pore sum, the another one peak is distributed between 30～50 μ m, and quantity accounts for 50～60% of pore sum, and the climax appears at 33～35 μ m.
From accompanying drawing 2 as seen, a large amount of tiny and uniform pores that distributing between the sample particle have microcrack to link between pore and the pore, and this helps gas can be transferred to another pore from a pore, form gas passage.
4, product and application
Referenced patent number is a kind of tundish air blowing type retaining dam of ZL200520142243.5, with the aluminum raw material is that body material is made steel-making continuous casting tundish Argon diffuse type gas permeable brick product, and water analogue test shows that this product can form the micro-bubble that quantity is many, volume is little under lower operating pressure.This diffuse type gas permeable brick uses after 870 minutes in certain steel mill's sheet blank continuous casting tundish at home, residual brick profile is intact substantially, significantly do not corrode, peel off, fall the piece phenomenon, in use air feed is stable, show that this gas permeable brick has good anti-molten steel scouring, erosion performance, have good antistrip performance, permeability is stable, can satisfy the service requirements of tundish Argon.
Claims (5)
1, a kind of diffuse type gas permeable brick is characterized in that the material composition comprises body material, micro mist, swelling agent, wedding agent, water reducer, microvesicle air entrapment agent and suds-stabilizing agent, adopts the pouring forming technology manufacturing.
2, a kind of diffuse type gas permeable brick according to claim 1 is characterized in that the microvesicle air entrapment agent adopts rosin ester class air entrapment agent, and preferred weight ratio is 0.8～1.5%.
3, a kind of diffuse type gas permeable brick according to claim 1 is characterized in that suds-stabilizing agent adopts non-ionic type amides suds-stabilizing agent, and preferred weight ratio is 1.2～2.0%.
4, a kind of diffuse type gas permeable brick according to claim 1 is characterized in that water reducer adopts organic class non-ionic type water reducer.
5, a kind of diffuse type gas permeable brick according to claim 1 is characterized in that the base substrate high temperature maintenance immediately after the moulding, and curing temperature is 30 ℃～90 ℃, and preferred curing temperature is 50 ℃～70 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101270799A CN101607832A (en) | 2008-06-20 | 2008-06-20 | A kind of diffuse type gas permeable brick |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101270799A CN101607832A (en) | 2008-06-20 | 2008-06-20 | A kind of diffuse type gas permeable brick |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260094A (en) * | 2011-07-19 | 2011-11-30 | 武汉科技大学 | Preparation method of diffuse type permeable material |
| CN102276273A (en) * | 2011-07-15 | 2011-12-14 | 郑州大学 | Silicon nitride and corundum combined breathable bricks and preparation method |
| CN103157048A (en) * | 2011-12-15 | 2013-06-19 | 深圳太太药业有限公司 | Traditional Chinese medicine composition for treating chronic pelvic inflammation and preparation method thereof |
| CN107226688A (en) * | 2017-05-27 | 2017-10-03 | 武汉科技大学 | A kind of dispersive air brick and preparation method thereof |
| CN108358618A (en) * | 2018-05-23 | 2018-08-03 | 洛阳轩石高温材料有限公司 | The production method of combined cone disperse air brick |
-
2008
- 2008-06-20 CN CNA2008101270799A patent/CN101607832A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276273A (en) * | 2011-07-15 | 2011-12-14 | 郑州大学 | Silicon nitride and corundum combined breathable bricks and preparation method |
| CN102260094A (en) * | 2011-07-19 | 2011-11-30 | 武汉科技大学 | Preparation method of diffuse type permeable material |
| CN102260094B (en) * | 2011-07-19 | 2013-06-05 | 武汉科技大学 | Preparation method of diffuse type permeable material |
| CN103157048A (en) * | 2011-12-15 | 2013-06-19 | 深圳太太药业有限公司 | Traditional Chinese medicine composition for treating chronic pelvic inflammation and preparation method thereof |
| CN103157048B (en) * | 2011-12-15 | 2014-07-23 | 深圳太太药业有限公司 | Traditional Chinese medicine composition for treating chronic pelvic inflammation and preparation method thereof |
| CN107226688A (en) * | 2017-05-27 | 2017-10-03 | 武汉科技大学 | A kind of dispersive air brick and preparation method thereof |
| CN108358618A (en) * | 2018-05-23 | 2018-08-03 | 洛阳轩石高温材料有限公司 | The production method of combined cone disperse air brick |
| CN108358618B (en) * | 2018-05-23 | 2022-04-19 | 洛阳轩石新材料科技有限公司 | Method for manufacturing combined conical dispersion air brick |
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Application publication date: 20091223 |