CN106631050A - Cleaning-free air brick with uniform structure and manufacturing method thereof - Google Patents
Cleaning-free air brick with uniform structure and manufacturing method thereof Download PDFInfo
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- CN106631050A CN106631050A CN201510744235.6A CN201510744235A CN106631050A CN 106631050 A CN106631050 A CN 106631050A CN 201510744235 A CN201510744235 A CN 201510744235A CN 106631050 A CN106631050 A CN 106631050A
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Abstract
The invention discloses a cleaning-free air brick with a uniform structure and a manufacturing method thereof. The air brick is technically characterized in that refractory raw materials such as chrome corundum, corundum and mullite are selected for one-time allowance-free net forming through an isostatic press, air bricks made from corresponding materials can be selected according to ladle working conditions and smelting requirements, the material of an air-permeable part is uniform in structure, penetration of molten steel is reduced in a using process, uniform and stable air permeability is achieved, the using and operating cost is reduced, and the production cycle of an air brick product is also shortened.
Description
Technical field
The present invention relates to steel and iron industry external refining fire resisting material field, particularly ladle bottom supply argon gas system
System.
Background technology
In recent years China's development of iron ＆ steel industry is swift and violent, and iron and steel production capacity is seriously superfluous, and steel and iron industry is to China's nature
Environment is produced and had a strong impact on, based on this present situation, the direction and the demand of market economy according to national policy,
For fire resisting material field, reduces cost, develop skill content, and it is to compel to be essential to improve product using effect
Will；On the other hand, China's labor cost is increasing year by year, therefore, improve the automation journey of the means of production
Degree is also the active demand of current industrial development, should at least reduce industrial products to manually-operated dependence.
It is exactly external refining to weigh one of important step of steel and iron industry development degree, and the key of external refining
One of point is the functional device air brick for argon system, and the effect of air brick is by supplying into ladle
Argon gas realizes the purpose of refining stirring molten steel.
The industrial air brick of present steel is mostly molded using disposal pouring, using the macroscopic view for burning lost article generation
As ar gas passage, another kind is spliced using multiple ceramic thin plates and is embedded in castable to slit, using pottery
As gas-permeable channels, general system is referred to as " slot-type ventilating brick " to macroscopical slit between porcelain plate, and slit is saturating
Gas brick has significantly promoted the development of steel and iron industry, but slit itself to have resulted in thoroughly an epoch
The gross imperfection of gas brick, in use, particularly current special steel grade demand is more, and molten steel is easy to
Penetrated into by slit, and slit air brick needs the degree that hand sweeping is operated very high, does not meet current society
Can industrial expansion.
The content of the invention
To solve the above problems, the present invention adopts a series of technological means, and juche idea is just so that ventilative
Brick consumes the even structure of part, therefore can bring high life, operate without the need for hand sweeping, supply
Stablize, the technical advantages such as steel will not be oozed.
To reach above-mentioned purpose, the present invention is adopted the technical scheme that：
1, air brick refractory portion is made up of three parts, cylindric consumption core, round table-like safe core, week
Investment is enclosed, core is consumed and is docked along center line with safe core, be around embedded in air brick metal-back with investment
It is interior, in the present invention can also round table-like safe core, refractory portion is just made up of two parts, consumes
Core and surrounding investment.
Consume core and constitute as follows with the formula of safe core：
Granularity be 0.5mm-1mm, chromic oxide content for 0.1%-30% pink fused alumina, mass content is
45%-65%；The pink fused alumina that granularity is 0.1mm-0.5mm, chromic oxide content is 0.1%-30%, mass content
For 15%-45%；Granularity contains less than or equal to 180 mesh, the pink fused alumina that chromic oxide content is 0.1%-30%, quality
Measure as 0%-5%；Granularity contains less than or equal to 320 mesh, the pink fused alumina that chromic oxide content is 0.1%-30%, quality
Measure as 0%-10%；α type sintered alumina micro mists, mass content is 0%-12%；Chromium oxide micro mist, quality
Content is 0%-12%.Wherein granularity is 8%-25% less than or equal to the powder quality content summation of 180 mesh, little
Also include micro mist or nano powder, and the material quality content of all size specifications in the powder equal to 180 mesh
Summation is 100%.
Bonding agent used is：Polyvinyl alcohol mass content is 0%-3%；Dextrin mass content is 0%-2%；Wood
Quality sulfoacid calcium mass content is 0%-2%；Cellulose mass content is the oxygen that 0%-2% concentration is 3%-40%
It is 0%-10% to change Alumina gel mass content.All bonding agents are for additional, and mass content summation is
1%-10%.
In above-mentioned formula, pink fused alumina can with all or part of use alundum, electro-corundum, spinelle,
Alumina less than or equal to the zirconium oxide of 0.5mm, aluminium content more than 86% of magnesia-chrome sand, fused alumina zirconia, granularity, not
One or more come in stone are replaced by same size.For example：Specification is the pink fused alumina of 0.1mm-0.5mm,
Can be replaced with electro-corundum or mullite that specification is 0.1mm-0.5mm etc..
In above-mentioned formula, the pink fused alumina of any one specification can with alundum, electro-corundum, spinelle,
Alumina less than or equal to the zirconium oxide of 0.5mm, aluminium content more than 86% of magnesia-chrome sand, fused alumina zirconia, granularity, not
One or more come in stone are replaced in any proportion with same size.For example：Specification is 0.1mm-0.5mm
Pink fused alumina mass content be 20%, can be with electro-corundum or mullite that specification is 0.1mm-0.5mm etc.
10% is replaced, retains 10% pink fused alumina.
The cylindric diameter of section for consuming core selects 40mm-120mm according to ladle size and throughput requirement,
Diameter error is controlled within ± 10mm, is highly determined according to bag bottom refractory thickness.
The height of round table-like safe core selects 120mm-200mm.
In order to strengthen consumption core, consuming to be placed in the middle of core can not also place one or more ceramic rod,
Ceramic rod does not at most exceed 6 and is preferred, and ceramic rod adopts isostatic pressing or gel casting forming, and Jing
High temperature burns till, and ceramic rod is uniform around core center is consumed in order, identical highly with core is consumed；If placing one
Ceramic rod is propped up, diameter is a quarter for consuming core diameter to the maximum, and minimum is more than 10mm, if placed multiple
Ceramic rod, ceramic rod diameter takes 6mm-15mm.
Can arrange on ceramic rod can also be not provided with one or more air-vents.
2, consume core as follows with the preparation method of safe core：
2.1, get the raw materials ready by formula, bonding agent is pre-dissolved, different according to selected raw material, controlling total water consumption is
0.1%-5%；
2.2, first pour raw material of the granularity more than 180 mesh during mixed grind into, bonding agent is added after being well mixed, then
Raw material of the granularity less than or equal to 180 is added, mixes 5min；
2.3, compound is weighed into fixed qty, add elastic mould that is cylindric but being not necessarily cylinder
And seal, it is molded under hydrostatic pressure machine, briquetting pressure is controlled in 40MPa-120MPa, pressurize
Between be -500 seconds 10 seconds.
2.4, the adobe after form removal can be toasted into 1h-24h at a temperature of 100 DEG C -200 DEG C, it is also possible to no
Baking.
2.5, the adobe after form removal to be burnt till at a temperature of 1000 DEG C -1650 DEG C, temperature retention time is 0.5-5h.
3, the preparation method of air brick
3.1, make by technical scheme 2 and consume core and safe core；
3.2, safe core is fixed together with consumption core and is placed in air brick metal-back, it is solid with special mechanism
It is fixed；
3.3, pour into gravity flow investment or vibration moulding investment；
3.4,150 DEG C of -300 DEG C of bakings of Jing after solidification, temperature retention time is 6h-24h；
3.5, weld bonnet and tail pipe.
The present invention adjust consume grain composition when the method for core and safe core Air permenbility adopts dispensing, consume core with
Safe core minimum cross-sectional area, three kinds of means of briquetting pressure are realized.
The present invention is disposably molded using isostatic pressed to the making for consuming core and safe core without surplus dead size.
Investment selects Stainless-steel fibre corundum-spinel castable, Stainless-steel fibre chromium oxide-corundum-point brilliant
Appointing in the middle of stone castable, Stainless-steel fibre pink fused alumina castable, Stainless-steel fibre corundum-mullite castable
Meaning is a kind of, it is also possible to be not added with steel fibre.
Ceramic rod can select corundum-spinel, chromium oxide-corundum-spinel, chrome corundum, corundum-
Any one in the middle of mullite.
The invention has the beneficial effects as follows：Safe core can as secure ID, after consuming core loss and finishing,
Safe core is revealed, you can is stopped using or is at most used 1-2 time；
The composition for consuming core is a kind of homogeneous texture, and ventilation principle is using ceramic material gas permeability, in design
Material gas permeable brick is not exclusively caused to improve by particles filled during formula, it is this so as to reach the purpose of ventilation
The macro-size very little of gas passage, therefore, molten steel is substantially reduced by the degree that gas passage penetrates into, institute
Select typical feedstock pink fused alumina to have the performances such as good function, thermal shock, anti-erosion very good, incite somebody to action from this respect,
Molten steel or slag are also reduced by the degree that material itself penetrates into, since penetrate into reducing, will be easy to blow logical,
Oxygen cleaning operation need not be burnt, while also can improve the life-span.Have selected various raw materials in technical scheme 1 to replace
Pink fused alumina, can be directed to different refinings and require to provide the air brick of different performance with the ladle of operating mode, so as to control
In the life-span, be conducive to the saving of social resources.
The present invention makes consumption core by way of isostatic pressed, and this point has compared with conventional two sides is pressurized
The difference of essence, the base substrate of isostatic pressing is pressurized uniform, therefore material structure is evenly, is very beneficial for
Improve performance.Because selecting the molding mode of isostatic pressed, therefore consuming core to have selected cylindric, accomplish
It is disposable that without the shaping of surplus dead size, compared with other shapes, columned consumption core thermal stress is difficult to concentrate,
Playing itself function to investment around has facilitation.Consume core throughput can be adjusted with three kinds of modes,
First it is raw material proportioning, different proportionings can bring up different gas permeabilities；Secondly select to consume the different horizontal stroke of core
Sectional area；3rd adjustment briquetting pressure.
Compared with conventional breathable brick, the consumption core or safe core volume of high-temperature process are needed less, therefore for
The saving of the energy also has the certain significance, and particularly substantially reduces the fabrication cycle of air brick.
Description of the drawings：
Fig. 1：Air brick profile；
In figure 1.：Consume core；②：Safe core；③：Investment；④：Ceramic rod.
Specific embodiment
The present invention is described in detail for citing below：
1, make and consume core 1. with safe core 2., raw material proportioning is as follows：
Bonding agent proportioning is as follows
1.1, get the raw materials ready by formula, it is pre-dissolved bonding agent；
1.2, first pour raw material of the granularity more than 180 mesh during mixed grind into, bonding agent is added after being well mixed, then
Raw material of the granularity less than or equal to 180 is added, mixes 5min；
1.3, compound is weighed into fixed qty, add elastic mould simultaneously to seal, under hydrostatic pressure machine into
Type, in 65MPa, the dwell time is 20 seconds for briquetting pressure control.
1.4, by the consumption core after form removal, 1. adobe toasts 12h at a temperature of 150 DEG C.
1.5, by the consumption core after form removal, 1. adobe is burnt till at a temperature of 1650 DEG C, and temperature retention time is 1h,
2. safe core burns till at a temperature of 1400 DEG C, and temperature retention time is 3h.
2,4. make strengthens ceramic rod, and 4., briquetting pressure is 100MPa to isostatic pressing ceramic rod, material
Matter selects chrome corundum, and critical granularity is 3mm.
3, make air brick
3.1, by safe core 2. with consume core and be 1. fixed together and be placed in air brick metal-back, with special
Mechanism is fixed；
3.2, pour into gravity flow investment 3.；
3.3,250 DEG C of bakings of Jing after solidification, temperature retention time is 12h；
3.4, weld bonnet and tail pipe.
Claims (10)
1. a kind of even structure exempts from the air brick for cleaning, and it is characterized in that：Refractory portion disappears comprising cylindric
Consumption core, round table-like safe core, investment, it is also possible to should not safe core, consume the formula group of core and safe core
Into as follows：
Granularity be 0.5mm-1mm, chromic oxide content for 0.1%-30% pink fused alumina, mass content is
45%-65%；The pink fused alumina that granularity is 0.1mm-0.5mm, chromic oxide content is 0.1%-30%, mass content
For 15%-45%；Granularity contains less than or equal to 180 mesh, the pink fused alumina that chromic oxide content is 0.1%-30%, quality
Measure as 0%-5%；Granularity contains less than or equal to 320 mesh, the pink fused alumina that chromic oxide content is 0.1%-30%, quality
Measure as 0%-10%；α type sintered alumina micro mists, mass content is 0%-12%；Chromium oxide micro mist, quality
Content is 0%-12%.
2. a kind of even structure exempts from the air brick for cleaning, and it is characterized in that：Consume core and bonding agent used by safe core
Proportioning is：Polyvinyl alcohol mass content is 0%-3%；Dextrin mass content is 0%-2%；Calcium lignosulfonate
Mass content is 0%-2%；Cellulose mass content is 0%-2%, and concentration is the alumina sol of 3%-40%
Mass content is 0%-10%, and all bonding agents are additional, and mass content summation is 1%-10%.
3. a kind of even structure according to claim 1 exempts from the air brick for cleaning, and it is characterized in that：Chromium is firm
Jade can be with all or part of use alundum, electro-corundum, spinelle, magnesia-chrome sand, fused alumina zirconia, granularity
One or more in alumina, mullite of the zirconium oxide, aluminium content less than or equal to 0.5mm more than 86% are pressed
Same size is replaced.
4. a kind of even structure according to claim 1 exempts from the air brick for cleaning, and it is characterized in that：Arbitrarily
A kind of pink fused alumina of specification can use alundum, electro-corundum, spinelle, magnesia-chrome sand, fused alumina zirconia, grain
One or more in alumina, mullite of zirconium oxide, aluminium content of the degree less than or equal to 0.5mm more than 86%
Replace with same size in any proportion.
5. a kind of even structure according to claim 1 or 3 or 4 exempts from the air brick for cleaning, its feature
It is：Granularity is 8%-25% less than or equal to the powder quality content summation of 180 mesh, less than or equal to the powder of 180 mesh
Material also includes micro mist or nano powder, and the material quality content summation of all size specifications is 100%.
6. exempt from the air brick for cleaning according to a kind of arbitrary described even structure of claim 1-5, it is characterized in that：
It is cylindric to consume the making of core and safe core using isostatic pressed disposably without the shaping of surplus dead size, it is cylindric to disappear
The diameter of section of consumption core selects 40mm-120mm, diameter error to control within ± 10mm, and safe core is high
Degree selects 120mm-200mm.
7. exempt from the air brick for cleaning according to a kind of arbitrary described even structure of claim 1-5, it is characterized in that：
Adjust and consume grain composition when core adopts dispensing with the method for safe core Air permenbility, consume core with safe core minimum
Area of section, three kinds of means of briquetting pressure are realized.
8. exempt from the air brick for cleaning according to a kind of arbitrary described even structure of claim 1-7, it is characterized in that：
Consume to be placed in the middle of core and can not also place one or more ceramic rod, ceramic rod does not at most exceed 6
, ceramic rod is burnt till using isostatic pressing or gel casting forming, and 1500 DEG C of -1650 DEG C of high temperature of Jing, is made pottery
Porcelain rod can select corundum-spinel, chromium oxide-corundum-spinel, chrome corundum, corundum-mullite
Any one in the middle of matter, ceramic rod is uniform around core center is consumed in order, identical highly with core is consumed, such as
Fruit places a ceramic rod, and diameter is a quarter for consuming core diameter to the maximum, and minimum is more than 10mm, if
Multiple ceramic rods are placed, ceramic rod diameter takes 6mm-15mm, can arrange on ceramic rod to be not provided with
One or more air-vents.
9. exempt from the air brick for cleaning according to a kind of arbitrary described even structure of claim 1-5, it is characterized in that：
Investment selects Stainless-steel fibre corundum-spinel castable, Stainless-steel fibre chromium oxide-corundum-spinel to pour
It is material feeding, Stainless-steel fibre pink fused alumina castable, any one in the middle of Stainless-steel fibre corundum-mullite castable
Kind, it is also possible to it is not added with steel fibre.
10. air brick and its making side for cleaning is exempted from according to a kind of arbitrary described even structure of claim 1-9
Method, is characterized in that：
Consume core as follows with the preparation method of safe core：
First, get the raw materials ready by formula, bonding agent is pre-dissolved, different according to selected raw material, controlling total water consumption is
0.1%-5%；
Second, first pour raw material of the granularity more than 180 mesh during mixed grind into, bonding agent is added after being well mixed, so
Raw material of the granularity less than or equal to 180 is added afterwards, mixes 5min；
3rd, for the mould of same volume, compound is weighed into fixed qty, add elastic mould and seal
Mouthful, it is molded under hydrostatic pressure machine, briquetting pressure is controlled in 40MPa-120MPa, and the dwell time is 10
- 500 seconds seconds；
4th, the adobe after form removal can be toasted into 1h-24h at a temperature of 100 DEG C -200 DEG C, it is also possible to no
Baking；
5th, the adobe after form removal to be burnt till at a temperature of 1000 DEG C -1650 DEG C, temperature retention time is 0.5-5h；
The manufacturing process of air brick is as follows：
First, safe core is fixed together with consumption core and is placed in air brick metal-back, use special mechanism
It is fixed；
Second, pour into gravity flow investment or vibration moulding investment；
3rd, 150 DEG C of -300 DEG C of bakings of Jing after solidification and form removal, temperature retention time is 6h-24h；
5th, weld bonnet and tail pipe.
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| CN201510744235.6A CN106631050B (en) | 2015-11-05 | 2015-11-05 | Cleaning-free air brick with uniform structure and manufacturing method thereof |
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| CN201510744235.6A CN106631050B (en) | 2015-11-05 | 2015-11-05 | Cleaning-free air brick with uniform structure and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107805059A (en) * | 2017-11-01 | 2018-03-16 | 安徽马钢耐火材料有限公司 | A kind of Ladle Bottom brick cup and preparation method thereof |
| CN108405842A (en) * | 2018-05-14 | 2018-08-17 | 洛阳轩石高温材料有限公司 | The novel making of air brick of steel ladle and building method |
| CN109732074A (en) * | 2019-02-20 | 2019-05-10 | 山东钢铁股份有限公司 | A kind of ladle dispersion ring ventilating filling pipe end brick cup and its Argon metallurgical method |
| CN109759575A (en) * | 2019-02-20 | 2019-05-17 | 山东钢铁股份有限公司 | A kind of annular air curtain barricade wall and its Argon metallurgical method for ladle |
| CN112745134A (en) * | 2021-01-13 | 2021-05-04 | 营口四通高温新材料科技有限公司 | Air brick containing corundum ceramic balls and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107805059A (en) * | 2017-11-01 | 2018-03-16 | 安徽马钢耐火材料有限公司 | A kind of Ladle Bottom brick cup and preparation method thereof |
| CN108405842A (en) * | 2018-05-14 | 2018-08-17 | 洛阳轩石高温材料有限公司 | The novel making of air brick of steel ladle and building method |
| CN108405842B (en) * | 2018-05-14 | 2024-05-28 | 洛阳轩石新材料科技有限公司 | Novel manufacturing and masonry method of steel ladle air brick |
| CN109732074A (en) * | 2019-02-20 | 2019-05-10 | 山东钢铁股份有限公司 | A kind of ladle dispersion ring ventilating filling pipe end brick cup and its Argon metallurgical method |
| CN109759575A (en) * | 2019-02-20 | 2019-05-17 | 山东钢铁股份有限公司 | A kind of annular air curtain barricade wall and its Argon metallurgical method for ladle |
| CN109732074B (en) * | 2019-02-20 | 2023-08-25 | 山东钢铁股份有限公司 | Ladle dispersion ring ventilation upper nozzle pocket brick and argon blowing metallurgical method thereof |
| CN109759575B (en) * | 2019-02-20 | 2023-08-25 | 山东钢铁股份有限公司 | Annular gas curtain wall for steel ladle and argon blowing metallurgical method thereof |
| CN112745134A (en) * | 2021-01-13 | 2021-05-04 | 营口四通高温新材料科技有限公司 | Air brick containing corundum ceramic balls and preparation method thereof |
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|---|---|
| CN106631050B (en) | 2019-12-10 |
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Address after: 471003 China (Henan) free trade pilot area, Luoyang area, 5 Xinfeng 407, Yin Kun science and Technology Park, 6 Hua Road, Gao. Applicant after: Luoyang Xuan Shi new Mstar Technology Ltd Address before: 471023 Feng Li Private Industrial Park, Luolong District, Luoyang, Henan, Qingnian Road Applicant before: LUOYANG XUANSHI HIGH TEMPERATURE MATERIALS CO., LTD. |
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