CN110818398A - Sagger for high-temperature firing and preparation method thereof - Google Patents
Sagger for high-temperature firing and preparation method thereof Download PDFInfo
- Publication number
- CN110818398A CN110818398A CN201810903009.1A CN201810903009A CN110818398A CN 110818398 A CN110818398 A CN 110818398A CN 201810903009 A CN201810903009 A CN 201810903009A CN 110818398 A CN110818398 A CN 110818398A
- Authority
- CN
- China
- Prior art keywords
- parts
- quartz
- sagger
- mixing
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6023—Gel casting
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The sagger for high-temperature firing is prepared by taking alumina powder, kaolin powder, clay powder, white corundum, quartz, mullite and the like as raw materials, mixing and molding the raw materials, and then firing the raw materials at a high temperature. The sagger for high-temperature firing has good thermal shock effect, low cost and long service life, can keep the crack resistance, uniformity and quality stability of products during batch production, and is suitable for being used in an environment with large temperature difference; compared with the sagger which is pre-synthesized quartz, mullite and formed by mixing, the sagger for high-temperature firing is produced in the high-temperature firing process, the produced finished product phase is more uniform, the color and the thermal shock stability are better, and the thermal expansion coefficient of the produced phase is small, so that the sagger has extremely high thermal shock stability; and the quartz is added, so that the thermal shock performance can be improved.
Description
Technical Field
The invention relates to a sagger for high-temperature firing, in particular to a sagger for high-temperature firing and a preparation method thereof.
Background
The sagger is mainly used for loading high-purity alumina material to be sintered at high temperature (1000-1500 ℃) when the high-purity alumina is fired at high temperature. The conventional sagger mainly comprises Al2O3Mainly mullite or high-alumina material. However, the conventional sagger has the disadvantages of short service life, poor thermal shock effect, easiness in cracking at high temperature, kiln blockage, high breakage rate and the like.
The conventional sagger has non-ideal thermal shock performance mainly due to the following reasons: first, Al is due to poor thermal shock effects of alumina itself2O3The higher the content, the lower the thermal shock times, and the temperature for firing the high-purity alumina material is generally at the highestThe temperature is 1000-1500 ℃, the temperature is only 6-10 h from the room temperature to the highest temperature, the temperature is kept for 3-8 h, the temperature is only 6-9 h from the highest temperature to the room temperature, the temperature rising and falling speed is high, the existing sagger is poor in rapid cooling and rapid heating resistance, and the sagger is easy to crack at high temperature. Secondly, in the production of the prior sagger, alumina is adopted as a main raw material to improve the shrinkage resistance, the thermal shock resistance and the temperature resistance of the product, and the volume density is generally 2.2kg/m3And the energy consumption is high and the energy is wasted after long-term use. Thirdly, the existing sagger is mostly formed by adopting a slurry suction mode, and the thickness of the wall and the bottom of the product is different, and the stress is different, so that the whole product is uneven in composition, has more weak parts, is poor in crack resistance, and is large in product differentiation and unstable in quality during batch production.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the sagger for high-temperature firing and the preparation method thereof.
The invention aims to provide a sagger for high-temperature firing.
A sagger for high-temperature firing according to an embodiment of the present invention is prepared from raw materials including: a binding agent or water reducing agent, alumina powder, white kaolin powder, yellow kaolin powder, quartz powder, white corundum, quartz and fused mullite.
According to the sagger for high-temperature firing, the binding agent is dextrin, and the white corundum comprises 36-mesh white corundum, 60-mesh white corundum, 80-mesh white corundum and 0-1mm white corundum according to different particle sizes.
The sagger for high-temperature firing according to the embodiment of the present invention, wherein the quartz includes 0.5-1mm quartz, 0.2-0.5mm quartz and 0.1-0.2mm quartz according to the particle size; the fused mullite comprises 0-0.5mm of fused mullite, 0.5-1mm of fused mullite and 1-3mm of fused mullite according to different grain diameters.
The sagger for high-temperature firing according to the embodiment of the invention is prepared from the following raw materials in parts by weight: 1-15 parts of a binding agent or 1-8 parts of a water reducing agent, 5-25 parts of alumina powder, 5-30 parts of white kaolin powder, 5-30 parts of yellow kaolin powder, 3-30 parts of quartz powder, 1-40 parts of 36-mesh white corundum, 1-40 parts of 60-mesh white corundum, 1-40 parts of 80-mesh white corundum, 1-40 parts of 0-1mm white corundum, 5-40 parts of 0.5-1mm quartz, 5-40 parts of 0.2-0.5mm quartz, 1-40 parts of 0.1-0.2mm quartz, 1-30 parts of 0-0.5mm fused mullite, 1-30 parts of 0.5-1mm mullite and 1-30 parts of 1-3mm fused mullite.
It is still another object of the present invention to provide a method for preparing the above sagger for high-temperature firing.
A method for preparing a sagger for high-temperature firing according to an embodiment of the present invention includes the steps of:
(1) performing magnetic separation on all the raw materials, and detecting impurity iron, wherein the iron content can be used after reaching the standard;
(2) mixing the alumina powder, kaolin powder, clay powder, white corundum, quartz, mullite, a binding agent or a water reducing agent and water which are subjected to magnetic separation in the step (1), and uniformly mixing to form a mixture;
(3) pouring and molding the mixture obtained in the step (2) to form a semi-finished product;
(4) demolding the semi-finished product obtained in the step (3), and drying after fettling;
(5) and (5) firing the semi-finished product dried in the step (4) to obtain the sagger for high-temperature firing.
According to the embodiment of the present invention, the method for preparing a sagger for high-temperature firing comprises the following steps: mixing the magnetically-separated alumina powder, kaolin powder, clay powder, white corundum, quartz and mullite for the first time by using a wheel mill mixer, wherein the time for mixing for the first time is 25-30min, the rotating speed for mixing for the first time is 15 r/min, and the mixing is uniform; then adding a binding agent or a water reducing agent for second mixing, wherein the time of the second mixing is 30-60min, the rotating speed of the second mixing is 25 r/min, and the mixing is uniform; and finally, adding water for third mixing, wherein the time of the third mixing is 1-4 hours, and the rotating speed of the third mixing is 35 r/min. All the raw materials can be uniformly mixed through three times of mixing, because the raw materials are placed in a classified mode and are not uniform when being placed, firstly, the dry materials are mixed for half an hour at a low speed, then, the binding agents are added for mixing, then, the water is added for mixing, and the materials can be more uniform through different rotating speeds in different time periods. The mixing of the raw materials is very critical to the performance of the finished product, and the uneven mixing directly causes no forming or cracks or slow forming speed, poor shock resistance and the like.
According to the preparation method of the saggar for high-temperature firing, in the step (3), the mixture is poured into a mold with water absorption, the mold comprises an outer sleeve and a film core, the mixture is poured into a space between the outer sleeve and the film core, and the film core is taken out after the mixture absorbs water to form a semi-finished product. When the water reducing agent is adopted in the raw materials without a binding agent, the mixture is poured into a mold with water absorption to be easier to form.
According to the preparation method of the saggar for high-temperature firing, in the step (3), the mixture is pressed into the die, the die comprises an upper die and a lower die, the mixture is pressed between the upper die and the lower die, and a semi-finished product is formed after the mixture is formed. When the raw materials adopt the binding agent without the water reducing agent, the mixture is pressed into a die to be easier to form.
According to the preparation method of the sagger for high-temperature firing, provided by the embodiment of the invention, further, the mixture is pressed into a mould by adopting a four-column vibration hydraulic press, and the mould is an alloy mould.
The alloy is carburizing steel or boronized reinforced steel, and the die is a carburizing steel or boronized reinforced steel alloy die.
The method for manufacturing a sagger for high-temperature firing according to the embodiment of the present invention, wherein, in the step (5), the firing temperature is 1290 ℃ to 1500 ℃, and the firing time is 5 to 10 hours.
The large-size sagger is formed or the binding agent is added when the clay and kaolin content in the raw material is low, so that the strength can be increased.
The mold having water absorption property is a plaster mold. The plaster mold is prepared by mixing gypsum powder and water serving as raw materials, wherein the mass ratio of the gypsum powder to the water is 1:1-1: 5. The gypsum mold has strong water absorption, can quickly condense and mold a product, greatly shortens the demolding speed, can demold within 1-2 hours, shortens the demolding time by about 5 hours compared with the prior production technology by 2/3, and is mainly used for large or anisotropic saggars.
The water reducing agent is a concrete admixture capable of reducing the water consumption for mixing under the condition of maintaining the slump constant of concrete basically. Most of them are anionic surfactants, such as lignosulfonate and naphthalene sulfonate formaldehyde polymer. After the concrete mixture is added, the dispersion effect on cement particles is achieved, the workability of the concrete mixture can be improved, the unit water consumption is reduced, and the fluidity of the concrete mixture is improved; or the unit cement consumption is reduced, and the cement is saved.
The four-column vibration hydraulic press is mainly used for forming products with the same size and large batches, and the products are more uniform due to vibration generated by the machine, the water consumption of semi-finished products is less, the forming speed is high, and the drying is fast.
The mixing machine is characterized in that the mixing machine is a roller mill mixer, wherein the roller mill mixer is used for mixing for the first time, the second time and the third time, the mixture can be more uniform, the toughness of a product can be improved, and the thermal shock performance of the product is improved.
The quartz in the invention has the following functions: the volume density of the product is reduced because the specific gravity of the quartz is 1.9kg/m3And can increase heat resistance and reduce energy consumption.
The electric melting mullite has the following functions: the electrofused mullite is the mullite fused and synthesized at high temperature, has more stable structure, is needle-shaped, can play a role in drawknot, and can play a role in thermal shock resistance and decomposition stress well.
The invention has the beneficial effects that: the sagger for high-temperature firing has the advantages of good thermal shock effect, low cost and long service life, can keep the crack resistance, uniformity and quality stability of products during batch production, and is suitable for being used in an environment with large temperature difference.
Compared with the sagger which is pre-synthesized quartz, mullite and formed by mixing, the sagger for high-temperature firing is produced in the high-temperature firing process, the produced finished product phase is more uniform, the color and the thermal shock stability are better, and the thermal expansion coefficient of the produced phase is small, so that the sagger has extremely high thermal shock stability; and the quartz is added, so that the thermal shock performance can be improved.
The white corundum, the quartz and the mullite with different grain diameters are adopted, so that the finished product is compact, the specific gravity of the quartz is 1.9, the integral specific gravity of the sagger for high-temperature firing is reduced after the quartz is added, and the white corundum and the quartz are of circular structures, while the fused mullite is of a needle shape or a cylindrical shape, so that certain bubbles are generated during composition, and the body shrinkage is also reduced. Moreover, the white corundum, the quartz and the fused mullite are adopted, and the three raw materials are obtained after being melted, so that the particle surface is smooth, the particles and the fine powder are not closely linked together when being combined, and micro cracks can be formed when the particles are impacted by temperature difference, so that the stress is decomposed through the cracks, and the finished product is compact.
The sagger for high-temperature firing has the volume density of 2.6-2.8kg/m31/3 is lighter than the existing product, and the energy consumption is saved when the product is used;
the dry powder is mixed for three times in the mixing process, so that direct contact and long-time contact with water and air are avoided, the properties of the raw materials are effectively maintained, a binding agent or a water reducing agent is added for mixing and reacting, water is added for mixing in a muddy manner, and the raw materials are fully and uniformly mixed while the finished product phase is more uniform and the color is better after high-temperature firing to the maximum extent by controlling parameters such as mixing time, rotating speed and the like;
the product is more uniform by adopting a four-column vibration hydraulic press for molding, the water consumption of the semi-finished product is less, the molding speed is high, and the drying is fast; the service cycle of the product is prolonged, the product structure is more uniform, weak links are reduced, the service life is prolonged, and the method is suitable for batch production;
adopt the wheel to grind the blendor, can make the mud more even, and increase the toughness of product, improve the product thermal shock performance, effectively keep toughness component wherein at the in-process of milling, prevent to suffer destruction in milling, simultaneously, wet grinding can make the particle size of milling reach 400 meshes, promotes that the finished product is more even, and is exquisite, and the shock resistance is better.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the following examples 1g is represented by 1 part by weight.
Example 1
This example provides a sagger for high temperature firing, which is prepared from 8 parts of a binder or 4.5 parts of a water reducing agent, 15 parts of alumina powder, 17.5 parts of white kaolin powder, 17.5 parts of yellow kaolin powder, 16.5 parts of quartz powder, 20.5 parts of 36-mesh white corundum, 20.5 parts of 60-mesh white corundum, 20.5 parts of 80-mesh white corundum, 20.5 parts of 0-1mm white corundum, 22.5 parts of 0.5-1mm quartz, 22.5 parts of 0.2-0.5mm quartz, 20.5 parts of 0.1-0.2mm quartz, 15.5 parts of 0-0.5mm fused mullite, 15.5 parts of 0.5-1mm fused mullite and 15.5 parts of 1-3mm fused mullite.
The preparation method comprises the following steps:
(1) performing magnetic separation on all the raw materials, and detecting impurity iron, wherein the iron content can be used after reaching the standard;
(2) mixing the alumina powder, kaolin powder, clay powder, white corundum, quartz, mullite, a water reducing agent and water which are subjected to magnetic separation in the step (1), and uniformly mixing to form a mixture;
(3) pouring and molding the mixture obtained in the step (2) to form a semi-finished product;
(4) demolding the semi-finished product obtained in the step (3), and drying after fettling;
(5) and (4) firing the semi-finished product dried in the step (4) at 1390 ℃ for 8h to obtain the sagger for high-temperature firing.
Example 2
The present embodiment is different from embodiment 1 in that: 1 part of a binding agent, 5 parts of alumina powder, 30 parts of white kaolin powder, 5 parts of yellow kaolin powder, 30 parts of quartz powder, 1 part of 36-mesh white corundum, 40 parts of 60-mesh white corundum, 40 parts of 80-mesh white corundum, 1 part of 0-1mm white corundum, 40 parts of 0.5-1mm quartz, 5 parts of 0.2-0.5mm quartz, 40 parts of 0.1-0.2mm quartz, 1 part of 0-0.5mm fused mullite, 30 parts of 0.5-1mm fused mullite and 1 part of 1-3mm fused mullite.
Example 3
The present embodiment is different from embodiment 1 in that: 8 parts of water reducing agent, 25 parts of alumina powder, 5 parts of white kaolin powder, 30 parts of yellow kaolin powder, 3 parts of quartz powder, 40 parts of 36-mesh white corundum, 1 part of 60-mesh white corundum, 1 part of 80-mesh white corundum, 40 parts of 0-1mm white corundum, 5 parts of 0.5-1mm quartz, 40 parts of 0.2-0.5mm quartz, 1 part of 0.1-0.2mm quartz, 30 parts of 0-0.5mm fused mullite, 1 part of 0.5-1mm fused mullite and 30 parts of 1-3mm fused mullite.
Example 4
This example provides a sagger for high temperature firing, which is prepared from 5 to 25 parts of alumina powder, 22.5 parts of kaolin powder, 11.5 parts of quartz powder, 12.5 parts of clay powder, 20.5 parts of 36-mesh white corundum, 20.5 parts of 60-mesh white corundum, 20.5 parts of 80-mesh white corundum, 22.5 parts of 1-0mm white corundum, 22.5 parts of 1-0.5mm quartz, 22.5 parts of 0.5-0.2mm quartz, 22.5 parts of 1-0mm quartz, 22.5 parts of 3-1mm quartz, 16.5 parts of 0-0.5mm fused mullite, 16.5 parts of 1-0.5mm fused mullite, 16.5 parts of 3-1mm fused mullite and 5 parts of a water reducing agent.
The preparation method comprises the following steps:
(1) performing magnetic separation on all the raw materials, and detecting impurity iron, wherein the iron content can be used after reaching the standard;
(2) mixing the alumina powder, kaolin powder, clay powder, white corundum, quartz and mullite subjected to magnetic separation in the step (1) for the first time, uniformly mixing, adding a water reducing agent for the second time, uniformly mixing, adding water for the third time, and uniformly mixing to form a mixture;
(3) directly pouring the mixture obtained in the step (2) into a mold with water absorption, wherein the mold comprises an outer sleeve and a film core, the mixture is poured into a space between the outer sleeve and the film core, and the film core is taken out after the mixture absorbs water to form a semi-finished product;
(4) demolding the semi-finished product obtained in the step (3), and drying after fettling;
(5) and (4) firing the semi-finished product dried in the step (4) at the temperature of 1290-1500 ℃ for 5-10h to obtain the sagger for high-temperature firing.
Example 5
This embodiment is different from embodiment 4 in that: 5 parts of alumina powder, 30 parts of kaolin powder, 3 parts of quartz powder, 20 parts of clay powder, 1 part of 36-mesh white corundum, 40 parts of 60-mesh white corundum, 40 parts of 80-mesh white corundum, 40 parts of 1-0mm white corundum, 5 parts of 1-0.5mm quartz, 40 parts of 0.5-0.2mm quartz, 5 parts of 1-0mm quartz, 40 parts of 3-1mm quartz, 30 parts of 0-0.5mm fused mullite, 3 parts of 1-0.5mm fused mullite, 30 parts of 3-1mm fused mullite and 1 part of water reducing agent.
Example 6
This embodiment is different from embodiment 4 in that: 25 parts of alumina powder, 5 parts of kaolin powder, 20 parts of quartz powder, 5 parts of clay powder, 40 parts of 36-mesh white corundum, 1 part of 60-mesh white corundum, 1 part of 80-mesh white corundum, 5 parts of 1-0mm white corundum, 40 parts of 1-0.5mm quartz, 5 parts of 0.5-0.2mm quartz, 40 parts of 1-0mm quartz, 5 parts of 3-1mm quartz, 3 parts of 0-0.5mm fused mullite, 30 parts of 1-0.5mm fused mullite, 3-1mm fused mullite and 8 parts of water reducing agent.
Example 7
This example provides a sagger for high temperature firing, which is prepared from 15 parts of alumina powder, 17.5 parts of white kaolin powder, 17.5 parts of yellow kaolin powder, 16.5 parts of quartz powder, 12.5 parts of clay powder, 20.5 parts of 36-mesh white corundum, 20.5 parts of 60-mesh white corundum, 20.5 parts of 80-mesh white corundum, 20.5 parts of 1-0mm white corundum, 22.5 parts of 1-0.5mm quartz, 22.5 parts of 0.5-0.2mm quartz, 10.5 parts of 3-1mm quartz, 15.5 parts of 0-0.5mm fused mullite, 15.5 parts of 1-0.5mm fused mullite and 8 parts of a bonding agent.
The preparation method comprises the following steps:
(1) performing magnetic separation on all the raw materials, and detecting impurity iron, wherein the iron content can be used after reaching the standard;
(2) mixing the alumina powder, kaolin powder, clay powder, white corundum, quartz and mullite which are subjected to magnetic separation in the step (1) for the first time, uniformly mixing, then adding a bonding agent for the second time, uniformly mixing, adding water for the third time, mixing for 1-4 hours, and uniformly mixing to form a mixture;
(3) adopting a four-column vibration hydraulic press to cast the mixture obtained in the step (2) and then press the mixture into a mold, wherein the mold comprises an upper mold and a lower mold, the mixture is pressed between the upper mold and the lower mold, and a semi-finished product is formed after molding;
(4) demolding the semi-finished product obtained in the step (3), and drying after fettling;
(5) and (4) firing the semi-finished product dried in the step (4) at the temperature of 1290-1500 ℃ for 5-10h to obtain the sagger for high-temperature firing.
Example 8
This embodiment is different from embodiment 7 in that: 5 parts of alumina powder, 30 parts of white kaolin powder, 5 parts of yellow kaolin powder, 30 parts of quartz powder, 5 parts of clay powder, 40 parts of 36-mesh white corundum, 1 part of 60-mesh white corundum, 40 parts of 80-mesh white corundum, 1 part of 1-0mm white corundum, 40 parts of 1-0.5mm quartz, 5 parts of 0.5-0.2mm quartz, 20 parts of 3-1mm quartz, 1 part of 0-0.5mm fused mullite, 30 parts of 1-0.5mm fused mullite and 1 part of a binding agent.
Example 9
This embodiment is different from embodiment 7 in that: 25 parts of alumina powder, 5 parts of white kaolin powder, 30 parts of yellow kaolin powder, 3 parts of quartz powder, 20 parts of clay powder, 1 part of 36-mesh white corundum, 40 parts of 60-mesh white corundum, 1 part of 80-mesh white corundum, 40 parts of 1-0mm white corundum, 5 parts of 1-0.5mm quartz, 40 parts of 0.5-0.2mm quartz, 1 part of 3-1mm quartz, 30 parts of 0-0.5mm fused mullite, 1 part of 1-0.5mm fused mullite and 15 parts of a binding agent.
Performance testing
The sagger for high-temperature firing prepared in the embodiment 7 of the invention is compared with the performance of a commercially available sagger made of mullite material, and the performance is detected according to the national detection standard as follows:
apparent porosity, bulk density: GB/T2997-2000
Normal temperature flexural strength: GB/T3001-2007
High-temperature flexural strength: GB/T3002-2004
Thermal shock: YB/T376.1-1995
Creep deformation: GB/T5073-2005
The test results are shown in table 1:
TABLE 1 comparison of the sagger for high-temperature firing of the present invention with the conventional sagger made of mullite material
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A sagger for high temperature firing, characterized in that it is prepared from the following raw materials: a binding agent or water reducing agent, alumina powder, white kaolin powder, yellow kaolin powder, quartz powder, white corundum, quartz and mullite.
2. The sagger for high-temperature firing according to claim 1, wherein the binder is dextrin, the white corundum includes 36-mesh white corundum, 60-mesh white corundum, 80-mesh white corundum and 0-1mm white corundum in different grain sizes, and the mullite is fused mullite.
3. The sagger for high-temperature firing according to claim 1, wherein the quartz includes 0.5 to 1mm quartz, 0.2 to 0.5mm quartz and 0.1 to 0.2mm quartz in terms of particle size; the fused mullite comprises 0-0.5mm of fused mullite, 0.5-1mm of fused mullite and 1-3mm of fused mullite according to different grain diameters.
4. The sagger for high-temperature firing according to claims 1 to 3, wherein the sagger is prepared from the following raw materials comprising, in parts by weight: 1-15 parts of a binding agent or 1-8 parts of a water reducing agent, 5-25 parts of alumina powder, 5-30 parts of white kaolin powder, 5-30 parts of yellow kaolin powder, 3-30 parts of quartz powder, 1-40 parts of 36-mesh white corundum, 1-40 parts of 60-mesh white corundum, 1-40 parts of 80-mesh white corundum, 1-40 parts of 0-1mm white corundum, 5-40 parts of 0.5-1mm quartz, 5-40 parts of 0.2-0.5mm quartz, 1-40 parts of 0.1-0.2mm quartz, 1-30 parts of 0-0.5mm fused mullite, 1-30 parts of 0.5-1mm mullite and 1-30 parts of 1-3mm fused mullite.
5. A method for preparing a sagger for high-temperature firing according to claims 1 to 4, characterized in that it comprises the following steps:
(1) performing magnetic separation on all the raw materials, and detecting impurity iron, wherein the iron content can be used after reaching the standard;
(2) mixing the alumina powder, kaolin powder, clay powder, white corundum, quartz, mullite, a binding agent or a water reducing agent and water which are subjected to magnetic separation in the step (1), and uniformly mixing to form a mixture;
(3) pouring and molding the mixture obtained in the step (2) to form a semi-finished product;
(4) demolding the semi-finished product obtained in the step (3), and drying after fettling;
(5) and (5) firing the semi-finished product dried in the step (4) to obtain the sagger for high-temperature firing.
6. The method for producing a sagger for high-temperature firing according to claim 5, wherein in the step (2), the mixing is specifically: mixing the magnetically-separated alumina powder, kaolin powder, clay powder, white corundum, quartz and mullite for the first time by using a wheel mill mixer, wherein the time for mixing for the first time is 25-30min, the rotating speed for mixing for the first time is 15 r/min, and the mixing is uniform; then adding a binding agent or a water reducing agent for second mixing, wherein the time of the second mixing is 30-60min, the rotating speed of the second mixing is 25 r/min, and the mixing is uniform; and finally, adding water for third mixing, wherein the time of the third mixing is 1-4 hours, and the rotating speed of the third mixing is 35 r/min.
7. The method for producing a sagger for high-temperature firing according to claim 5, wherein in the step (3), the mixture is poured into a mold having water absorption property, the mold comprises a sheath and a film core, the mixture is poured into a space between the sheath and the film core, and the film core is taken out after the mixture absorbs water to form a semi-finished product.
8. The method for manufacturing a saggar for high-temperature firing according to claim 6, wherein in the step (3), the mixture is pressed into a mold, the mold comprises an upper mold and a lower mold, the mixture is pressed between the upper mold and the lower mold, and a semi-finished product is formed after the mixture is molded.
9. The method for manufacturing a sagger for high temperature firing according to claim 8, wherein said mixture is pressed into a mold using a four-column vibration hydraulic press, said mold being an alloy mold.
10. The method for producing a sagger for high-temperature firing according to claim 6, wherein in the step (5), the firing temperature is 1290 ℃ to 1500 ℃, and the firing time is 5 to 10 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903009.1A CN110818398A (en) | 2018-08-09 | 2018-08-09 | Sagger for high-temperature firing and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903009.1A CN110818398A (en) | 2018-08-09 | 2018-08-09 | Sagger for high-temperature firing and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110818398A true CN110818398A (en) | 2020-02-21 |
Family
ID=69541565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810903009.1A Pending CN110818398A (en) | 2018-08-09 | 2018-08-09 | Sagger for high-temperature firing and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110818398A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112094127A (en) * | 2020-09-25 | 2020-12-18 | 南阳开元高温新材料有限公司 | Manufacturing process of kyanite tailing series sagger |
| CN112778006A (en) * | 2021-03-24 | 2021-05-11 | 无锡尚臻新材料有限公司 | Light mullite sagger and preparation method and application thereof |
| CN113135745A (en) * | 2021-03-24 | 2021-07-20 | 无锡尚臻新材料有限公司 | Casting molding process for light mullite-spinel hollow sphere sagger |
| CN113149620A (en) * | 2021-03-24 | 2021-07-23 | 无锡尚臻新材料有限公司 | Light mullite-spinel hollow sphere sagger pressurization forming process |
| CN113213895A (en) * | 2021-06-08 | 2021-08-06 | 宜兴市兴洲特种陶瓷厂(普通合伙) | Novel electric heating high-temperature-resistant ceramic tube and manufacturing method thereof |
| CN114213109A (en) * | 2021-12-30 | 2022-03-22 | 辽宁省轻工科学研究院有限公司 | High-precision and high-strength ceramic hand mold and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120102396A (en) * | 2011-03-08 | 2012-09-18 | 주식회사 우진 | Sagger and composition of sagger containing silicon carbide for manufacturing positive, negative electrode active material of secondary battery |
| CN103030413A (en) * | 2013-01-07 | 2013-04-10 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing corundum mullite crucible |
| CN105669223A (en) * | 2016-01-08 | 2016-06-15 | 浙江长兴久鑫耐火材料有限公司 | Sagger |
| CN105693227A (en) * | 2016-01-08 | 2016-06-22 | 浙江长兴久鑫耐火材料有限公司 | Novel saggar |
| CN106336197A (en) * | 2016-08-24 | 2017-01-18 | 王哲 | Saggar for sintering of electroceramic materials and preparation method thereof |
| CN107619286A (en) * | 2017-09-13 | 2018-01-23 | 浙江招通高温材料有限公司 | A kind of preparation method of corundum-mullite sagger |
-
2018
- 2018-08-09 CN CN201810903009.1A patent/CN110818398A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120102396A (en) * | 2011-03-08 | 2012-09-18 | 주식회사 우진 | Sagger and composition of sagger containing silicon carbide for manufacturing positive, negative electrode active material of secondary battery |
| CN103030413A (en) * | 2013-01-07 | 2013-04-10 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing corundum mullite crucible |
| CN105669223A (en) * | 2016-01-08 | 2016-06-15 | 浙江长兴久鑫耐火材料有限公司 | Sagger |
| CN105693227A (en) * | 2016-01-08 | 2016-06-22 | 浙江长兴久鑫耐火材料有限公司 | Novel saggar |
| CN106336197A (en) * | 2016-08-24 | 2017-01-18 | 王哲 | Saggar for sintering of electroceramic materials and preparation method thereof |
| CN107619286A (en) * | 2017-09-13 | 2018-01-23 | 浙江招通高温材料有限公司 | A kind of preparation method of corundum-mullite sagger |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112094127A (en) * | 2020-09-25 | 2020-12-18 | 南阳开元高温新材料有限公司 | Manufacturing process of kyanite tailing series sagger |
| CN112778006A (en) * | 2021-03-24 | 2021-05-11 | 无锡尚臻新材料有限公司 | Light mullite sagger and preparation method and application thereof |
| CN113135745A (en) * | 2021-03-24 | 2021-07-20 | 无锡尚臻新材料有限公司 | Casting molding process for light mullite-spinel hollow sphere sagger |
| CN113149620A (en) * | 2021-03-24 | 2021-07-23 | 无锡尚臻新材料有限公司 | Light mullite-spinel hollow sphere sagger pressurization forming process |
| CN113213895A (en) * | 2021-06-08 | 2021-08-06 | 宜兴市兴洲特种陶瓷厂(普通合伙) | Novel electric heating high-temperature-resistant ceramic tube and manufacturing method thereof |
| CN114213109A (en) * | 2021-12-30 | 2022-03-22 | 辽宁省轻工科学研究院有限公司 | High-precision and high-strength ceramic hand mold and preparation method thereof |
| CN114213109B (en) * | 2021-12-30 | 2023-03-10 | 辽宁省轻工科学研究院有限公司 | High-precision and high-strength ceramic hand mold and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110818398A (en) | Sagger for high-temperature firing and preparation method thereof | |
| CN100522878C (en) | Carbon fibre enhanced reaction sintering silicon carbide ceramic and preparation method thereof | |
| CN107935608B (en) | Method for preparing zircon brick by using compact zircon aggregate | |
| CN111574226B (en) | Preparation method of high-density low-free silicon content reaction sintered silicon carbide ceramic material | |
| CN102528899A (en) | Production process for preparing silica ceramic crucible by use of pressure grouting method | |
| CN113354342A (en) | Regenerated micropowder concrete and preparation method thereof | |
| CN101955364A (en) | Method for producing corundum-mullite sagger | |
| CN109851374A (en) | Explosion-proof, long-life bottom brick of molten tin bath and preparation method thereof | |
| CN113480301B (en) | Preparation method of large brick at bottom of high-temperature sillimanite pool of large float glass melting furnace | |
| CN109320257A (en) | A kind of preparation method of high intensity high porosity porous silicon nitride ceramic | |
| CN105967692A (en) | Manufacturing method of silicon-nitride-combined silicon carbide ceramic crucible | |
| CN113149671B (en) | Casting molding process of light mullite-alumina hollow sphere-aluminum titanate sagger | |
| KR101325509B1 (en) | Manufacturing method of ceramic ware with high plasticity and high strength | |
| CN113149620A (en) | Light mullite-spinel hollow sphere sagger pressurization forming process | |
| US3389001A (en) | Glass bonded ceramic ware pressing mold and method of making same | |
| CN108395264A (en) | A kind of carbon stove regeneration brick and preparation method thereof | |
| CN110028313B (en) | Corundum crucible and preparation method thereof | |
| CN113045299A (en) | Machine-pressed carbon-free steel ladle brick containing composite binder and preparation method thereof | |
| CN102285808A (en) | Alkaliproof structure and thermal insulation integrated composite brick and preparation method thereof | |
| CN101508559B (en) | Roof tile bearing and burning rack and producing method thereof | |
| CN112094127A (en) | Manufacturing process of kyanite tailing series sagger | |
| CN110642610A (en) | Refractory brick for steel receiving opening of tundish and preparation method thereof | |
| CN113135745A (en) | Casting molding process for light mullite-spinel hollow sphere sagger | |
| CN112919890B (en) | Light mullite-alumina hollow sphere-aluminum titanate sagger and preparation method and application thereof | |
| CN115849883B (en) | Corrosion-resistant corundum wear-resistant castable easy to mold and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200221 |