CN115650738A - Refractory brick without bubbles and gaps inside and preparation method thereof - Google Patents
Refractory brick without bubbles and gaps inside and preparation method thereof Download PDFInfo
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- CN115650738A CN115650738A CN202211072608.6A CN202211072608A CN115650738A CN 115650738 A CN115650738 A CN 115650738A CN 202211072608 A CN202211072608 A CN 202211072608A CN 115650738 A CN115650738 A CN 115650738A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a refractory brick without bubbles and gaps inside, which comprises 10-30 parts of refractory clay, 8-20 parts of kaolin, 5-12 parts of alumina ore, 2-6 parts of diaspore clay, 6-12 parts of flint clay, 6-14 parts of sodium silicate, 3-5 parts of pyrophyllite, 4-8 parts of water, 2-6.5 parts of calcium carbide, 1.5-3 parts of plasticizer and 1-2 parts of defoaming agent. The refractory brick manufactured by the invention has the advantages of low density, high thickness, high uniformity, high strength, low material cost, simple manufacturing process, high-temperature resistance upper limit value, few surface pores and gaps of the brick body, no bubbles in the interior and high quality.
Description
Technical Field
The invention relates to the technical field of refractory bricks, in particular to a refractory brick without bubbles and gaps inside and a preparation method thereof.
Background
The firebricks are called firebricks for short. The refractory material is made by burning refractory clay or other refractory raw materials. Yellowish or brownish. The refractory brick is mainly used for bricking smelting furnaces and can resist the high temperature of 1580-1770 ℃. Also called fire brick. A shaped and sized refractory material. The brick can be divided into fired brick, unfired brick, fused cast brick and refractory heat-insulating brick according to the preparation process; can be divided into standard bricks, common bricks, special shaped bricks, etc. according to the shape and size. Can be used as high-temperature building materials and structural materials of construction kilns and various thermal equipment, and can bear various physical and chemical changes and mechanical actions at high temperature. Such as refractory clay bricks, high alumina bricks, silica bricks, magnesia bricks, etc. The life of the refractory bricks is affected in many ways, the most significant of which is the presence of many bubbles, pores or gaps inside the refractory bricks.
The existing refractory brick is complex in manufacturing process, and the manufactured refractory brick contains more bubbles, so that the quality of the refractory brick is integrally influenced.
Disclosure of Invention
The invention adopts a modified technical scheme to solve the technical defects, and the raw materials of the fireproof brick without bubbles and gaps inside comprise 10-30 parts of refractory clay, 8-20 parts of kaolin, 5-12 parts of alumina ore, 2-6 parts of diaspore clay, 6-12 parts of flint clay, 6-14 parts of sodium silicate, 3-5 parts of pyrophyllite, 4-8 parts of water, 2-6.5 parts of calcium carbide, 1.5-3 parts of plasticizer and 1-2 parts of defoaming agent.
In a further preferred embodiment of the present invention, the raw materials include 30 parts of a fire clay, 20 parts of kaolin, 12 parts of an alumina ore, 6 parts of a diaspore clay, 12 parts of a flint clay, 14 parts of sodium silicate, 5 parts of pyrophyllite, 8 parts of water, 6.5 parts of calcium carbide, 3 parts of a plasticizer, and 2 parts of an antifoaming agent.
In a further preferred embodiment of the present invention, the raw materials include 10 parts of a fire clay, 8 parts of kaolin, 5 parts of an alumina ore, 2 parts of a diaspore clay, 6 parts of a flint clay, 6 parts of sodium silicate, 3 parts of pyrophyllite, 4 parts of water, 2 parts of calcium carbide, 1.5 parts of a plasticizer, and 1 part of a defoaming agent.
As a further preferred mode of the present invention, there is included the steps of,
s1, preparing raw materials and removing impurities;
s2, preparing powder, namely screening refractory clay, kaolin, alumina ore, diaspore clay, flint clay, sodium silicate, pyrophyllite and calcium carbide by using a screen with the size of 2.5mm, and grinding the screened raw materials;
s3, preparing pug, namely adding water, a plasticizer and a defoaming agent into the powder, mixing and stirring for 15min, and controlling the temperature to be 78-85 ℃;
s4, molding preparation, namely feeding the pug into a corresponding sintering mold for molding;
s5, heating preparation, namely firstly, heating to 800 ℃ for 45min, then filling inert gas into a furnace pipe when the furnace temperature is increased to 1230 ℃, then starting a circulating fan to heat, keeping the temperature at 50 ℃/min for 5min in the heating process, keeping the temperature at 1480 ℃ for 1.5h, and then naturally cooling to finish the preparation.
As a further preferable mode of the present invention, the green density of the refractory brick is 2.75g/cm 3 (ii) a When the size of the brick blank is less than or equal to 100mm, the error is within +/-1 mm: when the brick blank is 100-200mm, the error tolerance range is +/-1.5 mm: when the size of the refractory brick is more than or equal to 1.5mm: when the size of the refractory brick is more than or equal to 200mm, the error is +/-2 mm.
In a more preferred embodiment of the present invention, al in the pyrophyllite and alumina ore is 2 O 3 ≥18％，Fe 2 O 3 ≤0.5％。
As a further preferred embodiment of the present invention, al in the chamotte, kaolin, alumina ore, diaspore clay and flint clay 2 O 3 Content is more than or equal to 34 percent, fe 2 O 3 The content is less than or equal to 1.0 percent.
As a further preferable mode of the present invention, in the step S3, the raw materials are stirred and mixed by the driving of the motor during the mixing process, and the rotating speed is controlled to be 68-125r/min and lasts for 30min.
In a more preferred embodiment of the present invention, in step S5, the inert gas is one of argon gas and helium gas, and the amount of the inert gas is 50 ml/min.
The invention has the following beneficial effects: the refractory brick manufactured by the invention has the advantages of low density, high thickness, high uniformity, high strength, low material cost, simple manufacturing process, high-temperature resistance upper limit value, few surface pores and gaps of the brick body, no bubbles in the interior and high quality.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: the raw materials of the refractory brick without bubbles and gaps inside the refractory brick comprise 10-30 parts of refractory clay, 8-20 parts of kaolin, 5-12 parts of alumina ore, 2-6 parts of diaspore clay, 6-12 parts of flint clay, 6-14 parts of sodium silicate, 3-5 parts of pyrophyllite, 4-8 parts of water, 2-6.5 parts of calcium carbide, 1.5-3 parts of plasticizer and 1-2 parts of defoaming agent.
The raw materials comprise 30 parts of refractory clay, 20 parts of kaolin, 12 parts of alumina ore, 6 parts of diaspore clay, 12 parts of flint clay, 14 parts of sodium silicate, 5 parts of pyrophyllite, 8 parts of water, 6.5 parts of calcium carbide, 3 parts of plasticizer and 2 parts of defoaming agent.
The raw materials comprise 10 parts of refractory clay, 8 parts of kaolin, 5 parts of alumina ore, 2 parts of diaspore clay, 6 parts of flint clay, 6 parts of sodium silicate, 3 parts of pyrophyllite, 4 parts of water, 2 parts of calcium carbide, 1.5 parts of plasticizer and 1 part of defoaming agent.
Comprises the following steps of (a) preparing a solution,
s1, preparing raw materials and removing impurities, wherein the raw materials are relatively long in the open air, and impurities and sundries mixed in the outside are removed before production.
S2, preparing powder, and screening refractory clay, kaolin, alumina ore, diaspore clay, flint clay, sodium silicate, pyrophyllite and calcium carbide by using a screen with the size of 2.5mm, grinding the screened raw materials, screening the materials with the uniform diameter by using the screen, and then feeding the materials into a grinding device to be uniformly ground into powder.
S3, preparing pug, namely adding water, a plasticizer and a defoaming agent into the powder, mixing and stirring for 15min, and controlling the temperature to be 78-85 ℃;
and S4, forming preparation, namely feeding the pug into a corresponding sintering mold for forming, wherein the sintering molds with different sizes can be selected according to requirements.
S5, heating preparation, namely firstly, heating to 800 ℃ for 45min, then filling inert gas into a furnace pipe when the furnace temperature is increased to 1230 ℃, then starting a circulating fan to heat, keeping the temperature at 50 ℃/min for 5min in the heating process, keeping the temperature at 1480 ℃ for 1.5h, and then naturally cooling to finish the preparation.
The density of the refractory brick blank body is 2.75g/cm 3 (ii) a When the size of the brick blank is less than or equal to 100mm, the error is within +/-1 mm: when the brick blank is 100-200mm, the error tolerance range is +/-1.5 mm: when the size of the refractory brick is more than or equal to 1.5mm: when the size of the refractory brick is more than or equal to 200mm, the error is +/-2 mm.
Al in pyrophyllite and alumina ores 2 O 3 ≥18％，Fe 2 O 3 Less than or equal to 0.5 percent, and Al is also selected 2 O 3 The pyrophyllite and alumina ore with higher content can improve the high temperature resistant effect of the brick body.
Al in refractory clay, kaolin, alumina ore, diaspore clay, flint clay 2 O 3 Content is more than or equal to 34 percent, fe 2 O 3 The content is less than or equal to 1.0 percent, and Al is selected 2 O 3 The high content of fireclay, kaolin, alumina ore, diaspore clay and flint clay makes the brick body have better high temperature resistance.
In the step S3, in the mixing process, the raw materials are stirred and mixed by utilizing the driving of the motor, the rotating speed is controlled to be 68-125r/min and lasts for 30min, the motor is used as power to drive the stirring equipment, and different rotating speeds are adjusted, so that the raw material components can be rapidly and uniformly mixed
In the step S5, the inert gas is one of argon gas or helium gas, the injection amount is 50ml/min, the inert gas is uniformly injected, so that the internal heating process is more stable, and the oxidation and other chemical reactions in the internal heating process are prevented.
Example one
30kg of refractory clay, 20kg of kaolin, 12kg of alumina ore, 6kg of diaspore clay, 12kg of flint clay, 14kg of sodium silicate, 5kg of pyrophyllite, 8kg of water, 6.5kg of calcium carbide, 3kg of plasticizer and 2kg of defoaming agent.
Preparing raw materials, removing impurities, preparing powder, sieving refractory clay, kaolin, alumina ore, diaspore clay, flint clay, sodium silicate, pyrophyllite and calcium carbide by using a 2.5mm sieve, grinding the sieved raw materials, preparing mud, adding water, plasticizer and defoaming agent into the powder, mixing and stirring for 15min, controlling the temperature to be between 78 and 85 ℃, preparing the mud by molding, feeding the mud into a corresponding sintering mold for molding, preparing the mud by heating, firstly heating to 800 ℃ for 45min, then filling inert gas into a furnace pipe when the furnace temperature is increased to 1230 ℃, then starting a circulating fan to heat, keeping the temperature at 50 ℃/min for increasing and keeping for 5min in the heating process, then keeping the temperature at 1480 ℃ for 1.5h, and then naturally cooling to finish the preparation, wherein Al in the pyrophyllite and alumina ore 2 O 3 Content of (3) 28% Fe 2 O 3 The content of (2) is 0.3%.
Example two
The raw materials comprise 10kg of refractory clay, 8kg of kaolin, 5kg of alumina ore, 2kg of diaspore clay, 6kg of flint clay, 6kg of sodium silicate, 3kg of pyrophyllite, 4kg of water, 2kg of calcium carbide, 1.5kg of plasticizer and 1kg of defoaming agent.
Preparing raw materials, removing impurities, preparing powder, sieving fire-resistant clay, kaolin, alumina ore, diaspore clay, flint clay, sodium silicate, pyrophyllite and calcium carbide by using a 2.5mm sieve, grinding the sieved raw materials, preparing mud, adding water, a plasticizer and a defoaming agent into the powder, mixing and stirring for 15min, controlling the temperature to be between 78 and 85 ℃, and formingThe preparation method comprises the steps of feeding the pug into a corresponding sintering mold for molding and heating, heating to 800 ℃ for 45min, filling inert gas into a furnace pipe when the furnace temperature is increased to 1230 ℃, starting a circulating fan to heat, keeping the temperature at 50 ℃/min during heating for 5min, keeping the temperature at 1480 ℃ for 1.5h, and naturally cooling to finish the preparation, wherein Al in pyrophyllite and alumina ore 2 O 3 Content of (3%) Fe 2 O 3 The content of (B) is 0.2%.
100 samples of the first embodiment and the second embodiment are respectively taken, and the specific table parameters are as follows
As can be seen from the table, the brick body of the invention has low density, high upper limit value of high temperature resistance, fewer pores and gaps on the surface, zero bubbles inside and better quality of the brick body.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides an inside bubble-free seamless resistant firebrick which characterized in that: the raw materials comprise 10-30 parts of refractory clay, 8-20 parts of kaolin, 5-12 parts of alumina ore, 2-6 parts of diaspore clay, 6-12 parts of flint clay, 6-14 parts of sodium silicate, 3-5 parts of pyrophyllite, 4-8 parts of water, 2-6.5 parts of calcium carbide, 1.5-3 parts of plasticizer and 1-2 parts of defoaming agent.
2. The refractory brick according to claim 1, wherein the raw materials include chamotte 30 parts, kaolin 20 parts, alumina ore 12 parts, diaspore clay 6 parts, flint clay 12 parts, sodium silicate 14 parts, pyrophyllite 5 parts, water 8 parts, calcium carbide 6.5 parts, plasticizer 3 parts, and defoaming agent 2 parts.
3. The refractory brick of claim 1, wherein the raw materials include 10 parts of chamotte, 8 parts of kaolin, 5 parts of alumina ore, 2 parts of diaspore clay, 6 parts of flint clay, 6 parts of sodium silicate, 3 parts of pyrophyllite, 4 parts of water, 2 parts of calcium carbide, 1.5 parts of plasticizer, and 1 part of defoaming agent.
4. The method for manufacturing a refractory brick having no bubbles and no gaps inside according to claim 1, comprising the steps of,
s1, preparing raw materials and removing impurities;
s2, preparing powder, namely screening refractory clay, kaolin, alumina ore, diaspore clay, flint clay, sodium silicate, pyrophyllite and calcium carbide by using a screen with the size of 2.5mm, and grinding the screened raw materials;
s3, preparing pug, namely adding water, a plasticizer and a defoaming agent into the powder, mixing and stirring for 15min, and controlling the temperature to be 78-85 ℃;
s4, molding preparation, namely feeding the pug into a corresponding sintering mold for molding;
s5, heating preparation, namely firstly, heating to 800 ℃ for 45min, then filling inert gas into a furnace pipe when the furnace temperature is increased to 1230 ℃, then starting a circulating fan to heat, keeping the temperature at 50 ℃/min for 5min in the heating process, keeping the temperature at 1480 ℃ for 1.5h, and then naturally cooling to finish the preparation.
5. The refractory brick of claim 1, wherein the green body density of the refractory brick is 2.75g/cm 3 (ii) a When the size of the brick blank is less than or equal to 100mm, the error is within +/-1 mm: when the brick blank is 100-200mm, the error tolerance range is +/-1.5 mm: when the size of the refractory brick is more than or equal to 1.5mm: when the size of the refractory brick is more than or equal to 200mm, the error is +/-2 mm.
6. The refractory brick according to claim 1, wherein Al in the pyrophyllite and alumina ores is contained in the refractory brick in step S1 2 O 3 ≥18%，Fe 2 O 3 ≤0.5%。
7. The refractory brick as claimed in claim 1, wherein the refractory clay, kaolin, alumina ore, diaspore clay, or Al in flint clay 2 O 3 Content is more than or equal to 34 percent, fe 2 O 3 The content is less than or equal to 1.0 percent.
8. The method as claimed in claim 4, wherein in the step S3, the raw materials are stirred and mixed by the motor, and the rotation speed is controlled at 68-125r/min for 30min.
9. The method as claimed in claim 4, wherein the inert gas is one of argon and helium, and the injection amount is 50ml/min, and the inert gas is uniformly injected in step S5.
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| CN202211072608.6A CN115650738A (en) | 2022-09-02 | 2022-09-02 | Refractory brick without bubbles and gaps inside and preparation method thereof |
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| CN202211072608.6A CN115650738A (en) | 2022-09-02 | 2022-09-02 | Refractory brick without bubbles and gaps inside and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB513972A (en) * | 1938-04-25 | 1939-10-26 | Metallfrax Actiengesellschaft | Improvements in and relating to refractory brick |
| CN108840659A (en) * | 2018-07-31 | 2018-11-20 | 合肥铭佑高温技术有限公司 | A kind of corrosion-resistant light fire brick and preparation method thereof |
| CN111423220A (en) * | 2020-05-18 | 2020-07-17 | 中冶焦耐(大连)工程技术有限公司 | Baking-free refractory brick and low-emission, energy-saving and intelligent production process thereof |
-
2022
- 2022-09-02 CN CN202211072608.6A patent/CN115650738A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB513972A (en) * | 1938-04-25 | 1939-10-26 | Metallfrax Actiengesellschaft | Improvements in and relating to refractory brick |
| CN108840659A (en) * | 2018-07-31 | 2018-11-20 | 合肥铭佑高温技术有限公司 | A kind of corrosion-resistant light fire brick and preparation method thereof |
| CN111423220A (en) * | 2020-05-18 | 2020-07-17 | 中冶焦耐(大连)工程技术有限公司 | Baking-free refractory brick and low-emission, energy-saving and intelligent production process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 祝天林等: "《绿色耐火材料》", 中国建材工业出版社 * |
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