CN116496077B - Refractory material and preparation method thereof - Google Patents
Refractory material and preparation method thereof Download PDFInfo
- Publication number
- CN116496077B CN116496077B CN202310759832.0A CN202310759832A CN116496077B CN 116496077 B CN116496077 B CN 116496077B CN 202310759832 A CN202310759832 A CN 202310759832A CN 116496077 B CN116496077 B CN 116496077B
- Authority
- CN
- China
- Prior art keywords
- heating
- parts
- layer
- powder
- spraying
- 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.)
- Active
Links
- 239000011819 refractory material Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 100
- 238000005507 spraying Methods 0.000 claims abstract description 66
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000000843 powder Substances 0.000 claims abstract description 44
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000005245 sintering Methods 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 17
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 98
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 27
- 239000003365 glass fiber Substances 0.000 claims description 20
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 14
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 230000002349 favourable effect Effects 0.000 description 10
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000012779 reinforcing material Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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
- C04B35/10—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 aluminium oxide
- C04B35/101—Refractories from grain sized 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
- 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
- C04B35/14—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 silica
-
- 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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/82—Asbestos; Glass; Fused silica
-
- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The application relates to the technical field of refractory materials, and discloses a refractory material and a preparation method thereof. The refractory material comprises the following components in parts by weight: al (Al) 2 O 3 44-67 parts of powder; siO (SiO) 2 37-56 parts of powder; 2-4 parts of 40-50wt% silica sol solution; al (Al) 2 O 3 The particle size of the powder is below 50 μm and SiO 2 The particle size of the powder is 10 μm or less. The method comprises the following steps: batching, mixing, stirring and forming, and alternately spraying silica sol solution, material and sintering to ensure that the product structure is more compact, thereby being beneficial to closing air holes and reducing the porosity in the product. Through multi-layer and repeated rolling, the formation rate of the through air holes is reduced, and meanwhile, the depth of the open air holes is reduced.
Description
Technical Field
The application relates to the technical field of refractory materials, and discloses a refractory material and a preparation method thereof.
Background
Porosity is an important technical indicator of refractory materials, and almost all properties of refractory materials are affected by porosity. The grain size ratio of each component in the existing refractory material is unreasonable, and the one-time compression molding is adopted during molding, for example, chinese patent CN102910917B discloses a magnesia-calcia-carbon refractory material, and a pressing machine is used for compression molding to obtain green bricks.
The proportion of the particle sizes of the components is unreasonable, so that more bubbles or gaps of the blank are formed, and the bubbles or gaps of the blank cannot be effectively removed when the blank is subjected to compression molding, so that the porosity is higher.
Disclosure of Invention
The application aims to provide a refractory material and a preparation method thereof, which aims to solve the problems and reduce the porosity in the product.
In order to achieve the aim, the application discloses a refractory material which comprises the following components in parts by weight:
Al 2 O 3 44-67 parts of powder;
SiO 2 37-56 parts of powder;
2-4 parts of 40-50wt% silica sol solution;
Al 2 O 3 the particle size of the powder is below 50 μm and SiO 2 The particle size of the powder is 10 μm or less.
The water content of the components is less, which is beneficial to reducing the porosity in the product.
The reasonable particle size ensures that the product structure is more compact, is beneficial to closing the air holes and reducing the porosity in the product.
Preferably, the composition further comprises the following components in parts by weight:
3-7 parts of glass fiber.
The glass fiber can be used as a reinforcing material to improve the product performance.
Preferably, the glass fibers have a diameter of 10 μm or less.
The smaller diameter makes the product structure more compact, is favorable for closing the air holes, and is favorable for reducing the porosity in the product.
Preferably, the composition further comprises the following components in parts by weight:
1-2 parts of iron oxide red.
Can be used as an auxiliary sintering agent, further reduces the water content of the component and is beneficial to reducing the porosity in the product.
A method for preparing the refractory material, comprising the following steps:
s1, proportioning, and weighing Al 2 O 3 44-67 parts of powder, siO 2 37-56 parts of powder, and 2-4 parts of 40-50wt% silica sol solution;
s2, mixing, firstly, mixing Al 2 O 3 Powder, siO 2 Adding the powder into a mixer, mixing for 8-10min, then adding 1-2 parts of 40-50wt% silica sol solution, and mixing for 8-10min;
s3, stirring, namely adding the product obtained in the step S2 into a vacuum stirrer, stirring for 10-15 min, and standing for 24-48h in a vacuum environment;
s4, forming, namely spraying a layer of product material in the step S3 on a heating bottom plate by using a spraying pipe under a vacuum environment, heating the lower surface and the upper surface of the first layer of material, rolling the first layer of material by using a heating press roller after the upper surface of the first layer of material is dried, spraying a layer of 40-50wt% silica sol solution on the upper side of the first layer of material by using a spraying pipe, finally spraying a second layer of product material in the step S3 by using a spraying pipe, heating the lower surface of the first layer of material and the upper surface of the second layer of material, rolling the second layer of material after the upper surface of the second layer of material is dried, and alternately spraying the silica sol solution and the material to obtain a blank;
s5, sintering, namely sintering the product obtained in the step S4, wherein the sintering temperature is 1700-1750 ℃, the heat preservation is carried out for 8-12 hours, and the heating rate is 3-5 ℃/mm.
Through multi-layer and repeated rolling, the formation rate of the through air holes is reduced, and meanwhile, the depth of the open air holes is reduced.
Preferably, a heating top plate is used when the upper surface of the material is heated, the heating top plate is driven by a top plate manipulator, the heating press roller is driven by a press roller manipulator, the material spraying pipe is driven by a material spraying manipulator, and the glue spraying pipe is driven by a glue spraying manipulator.
When the device is used, firstly, the spraying manipulator controls the spraying pipe to spray a layer of product material in the step S3 on the heating bottom plate, and the glue spraying manipulator controls the glue spraying pipe to spray a layer of silica sol solution on the upper side of the first layer of material; then, the top plate manipulator controls the heating top plate to be positioned right above the heating bottom plate; finally, the pressing roller manipulator controls the heating pressing roller to roll and heat the material. The production has high self-control degree and high production efficiency.
Preferably, the front side and the rear side of the heating bottom plate are both in sliding connection with end plates capable of moving up and down, an end plate resetting device is connected between the end plates and the heating bottom plate, a plurality of side rods capable of moving up and down are both in sliding connection with the left side and the right side of the heating bottom plate, and a side rod resetting device is connected between the side rods and the heating bottom plate.
When the heating press roller is used, the heating press roller moves to roll materials along the front-back direction, when the heating press roller contacts the end plate or the side rod, the end plate or the side rod is pressed down, the end plate or the side rod which is not contacted with the heating press roller is positioned in an initial state, the end plate or the side rod surrounds the heating bottom plate for a circle, the materials on the heating bottom plate are prevented from sliding down under the action of gravity or the heating press roller, the stability of the shape of the materials is maintained, and meanwhile, gaps between the end plate or the side rod are favorable for releasing gas in the materials.
Preferably, both sides all have the arch around the heating bottom plate, install the shell around heating bottom plate a week on the arch, and end plate and side lever all are arranged in the space between shell and the heating bottom plate, offer on the end plate and be used for dodging bellied protruding groove of dodging, end plate resetting means is including the first U type leaf spring that is located between end plate lower part and the shell bottom, and the shape of side lever is the shape of falling the II, and side lever resetting means is including the second U type leaf spring that is located between side lever lower part and the shell bottom.
Specifically, end plate spring constant head tank has been seted up to the end plate lower extreme, and side lever spring constant head tank has been seted up to the side lever lower extreme, and shell spring constant head tank has been seted up to the shell bottom.
When the device is used, the shell provides guidance for the movement of the end plate and the side rod, and the accuracy of the movement of the end plate and the side rod is ensured.
Preferably, the shell is connected with the heating bottom plate through a locating pin.
When in use, the mounting position of the shell is accurate.
Preferably, the bulge is provided with a spring mounting plate, the end plate is provided with an end plate threading hole, the side rod is provided with a side rod threading hole, the pull rope penetrates through the end plate threading hole and the side rod threading hole, and a pull rope spring is connected between the end part of the pull rope and the spring mounting plate.
When the heating roller is used, when part of the side rods move downwards, the adjacent part of the side rods also move downwards under the action of the pull ropes, so that the heating roller is facilitated to move.
In summary, the beneficial effects of the application are as follows: and after the upper surface of the material is dried and is not adhered, the material is rolled and heated by a heating press roll, so that the gas is promoted to be discharged, the product structure is more compact, the air holes are sealed, and the porosity in the product is reduced. In the drying and rolling process, the silica sol solution on the upper surface of the materials is contracted downwards, and a layer of silica sol solution is sprayed between each two layers of materials, so that the silica sol solution between the materials is supplemented, and the uniformity of the internal structure of the blank body is ensured. Through multi-layer and repeated rolling, the formation rate of the through air holes is reduced, and meanwhile, the depth of the open air holes is reduced.
Drawings
FIG. 1 is a schematic view of a forming apparatus in a refractory production method according to the present application;
FIG. 2 is a schematic view of the structure of a heating soleplate in a refractory material preparing method according to the present application;
FIG. 3 is a schematic side view of a heating soleplate in a refractory material preparing method according to the present application;
FIG. 4 is a schematic view of the structure of section A-A in FIG. 2;
FIG. 5 is a schematic view of the partial C structure of FIG. 4;
FIG. 6 is a schematic view of the structure of section B-B in FIG. 2;
FIG. 7 is a schematic view of the structure of section D-D of FIG. 6;
FIG. 8 is a schematic view of the structure of section E-E in FIG. 6;
fig. 9 is a schematic view of the structure of section F-F in fig. 6.
In the figure: 1. heating the bottom plate; 2. a top plate manipulator; 3. heating the top plate; 4. a press roller manipulator; 5. heating the press roller; 6. a spraying manipulator; 7. a spraying pipe; 8. a glue spraying mechanical arm; 9. spraying a rubber tube; 10. a housing; 11. a connecting rod; 12. a spring mounting plate; 13. a pull rope spring; 14. an end plate; 15. a side bar; 16. pulling rope through holes; 17. a pull rope; 18. an end plate threading hole; 19. a side rod threading hole; 20. an end plate spring positioning groove; 21. side lever spring positioning groove; 22. a housing spring positioning slot; 23. a second U-shaped leaf spring; 24. a connecting bolt; 25. a protrusion; 26. the bulge dodges the groove; 27. a positioning pin; 28. a connecting rod installation groove; 29. a first U-shaped leaf spring.
Detailed Description
The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The application is further described with reference to the drawings and detailed description which follow:
the embodiment 1, a refractory material, comprises the following components in parts by weight: al (Al) 2 O 3 44 parts of powder; siO (SiO) 2 37 parts of powder; 2 parts of 50wt% silica sol solution; al (Al) 2 O 3 The particle size of the powder is below 50 μm and SiO 2 The particle size of the powder is 10 μm or less.
Wherein Al is 2 O 3 A white solid which is hardly soluble in water, has no odor, no smell and extremely hard quality, and has a melting point of 2050 ℃.
SiO 2 Melting point 1723 deg.C and chemical property is stable. Does not react with water. Has high fire resistance and high resistanceLow thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonance effect and unique optical characteristics thereof.
The water content of the component is less, which is beneficial to reducing the porosity in the product.
The reasonable particle size ensures that the product structure is more compact, is beneficial to closing the air holes and reducing the porosity in the product.
The composition also comprises the following components in parts by weight: 3 parts of glass fiber.
The glass fiber can be used as a reinforcing material to improve the product performance.
Specifically, the glass fiber has a diameter of 10 μm or less.
The smaller diameter makes the product structure more compact, is favorable for closing the air holes, and is favorable for reducing the porosity in the product.
The composition also comprises the following components in parts by weight: iron oxide red 1 part.
The iron oxide red comprises Fe 2 O 3 Melting point: 1565 ℃, can be used as an auxiliary sintering agent, further reduces the water content of the component, and is beneficial to reducing the porosity in the product.
Example 2, a refractory material comprising the following components in parts by weight: al (Al) 2 O 3 55 parts of powder; siO (SiO) 2 46 parts of powder; 3 parts of 45wt% silica sol solution; al (Al) 2 O 3 The particle size of the powder is below 50 μm and SiO 2 The particle size of the powder is 10 μm or less.
Wherein Al is 2 O 3 A white solid which is hardly soluble in water, has no odor, no smell and extremely hard quality, and has a melting point of 2050 ℃.
SiO 2 Melting point 1723 deg.C and chemical property is stable. Does not react with water. Has high fire resistance, high temperature resistance, small thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonance effect and unique optical characteristics.
The water content of the component is less, which is beneficial to reducing the porosity in the product.
The reasonable particle size ensures that the product structure is more compact, is beneficial to closing the air holes and reducing the porosity in the product.
The composition also comprises the following components in parts by weight: 5 parts of glass fiber.
The glass fiber can be used as a reinforcing material to improve the product performance.
Specifically, the glass fiber has a diameter of 10 μm or less.
The smaller diameter makes the product structure more compact, is favorable for closing the air holes, and is favorable for reducing the porosity in the product.
The composition also comprises the following components in parts by weight: iron oxide red 1.5 parts.
The iron oxide red comprises Fe 2 O 3 Melting point: 1565 ℃, can be used as an auxiliary sintering agent, further reduces the water content of the component, and is beneficial to reducing the porosity in the product.
Example 3, a refractory material comprising the following components in parts by weight: al (Al) 2 O 3 67 parts of powder; siO (SiO) 2 56 parts of powder; 4 parts of 40wt% silica sol solution; al (Al) 2 O 3 The particle size of the powder is below 50 μm and SiO 2 The particle size of the powder is 10 μm or less.
Wherein Al is 2 O 3 A white solid which is hardly soluble in water, has no odor, no smell and extremely hard quality, and has a melting point of 2050 ℃.
SiO 2 Melting point 1723 deg.C and chemical property is stable. Does not react with water. Has high fire resistance, high temperature resistance, small thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonance effect and unique optical characteristics.
The water content of the component is less, which is beneficial to reducing the porosity in the product.
The reasonable particle size ensures that the product structure is more compact, is beneficial to closing the air holes and reducing the porosity in the product.
The composition also comprises the following components in parts by weight: 7 parts of glass fiber.
The glass fiber can be used as a reinforcing material to improve the product performance.
Specifically, the glass fiber has a diameter of 10 μm or less.
The smaller diameter makes the product structure more compact, is favorable for closing the air holes, and is favorable for reducing the porosity in the product.
The composition also comprises the following components in parts by weight: iron oxide red 2 parts.
The iron oxide red comprises Fe 2 O 3 Melting point: 1565 ℃, can be used as an auxiliary sintering agent, further reduces the water content of the component, and is beneficial to reducing the porosity in the product.
Example 4 a method of preparing a refractory material as described above, comprising the following steps.
S1, proportioning, and weighing Al 2 O 3 44 parts of powder, siO 2 37 parts of powder, 2 parts of 50wt% silica sol solution, 3 parts of glass fiber and 1 part of iron oxide red.
This step is used to weigh the components for use.
S2, mixing, firstly, mixing Al 2 O 3 Powder, siO 2 Adding the powder, the glass fiber and the iron oxide red into a mixer, mixing for 8min, then adding 1 part of 50wt% silica sol solution, and mixing for 8min.
In this step, a part of the silica sol solution is used to be mixed with the remaining components, and the other part of the silica sol solution is used alone through the hose 9.
S3, stirring, namely adding the product obtained in the step S2 into a vacuum stirrer, stirring for 10min, and then standing for 24h in a vacuum environment;
in the step, the mixture is stirred in a vacuum stirrer, and air in the mixture is released, so that the porosity in the product is reduced.
S4, forming, namely spraying a layer of product material in the step S3 on the heating bottom plate 1 by using the spraying pipe 7 under a vacuum environment, heating the lower surface and the upper surface of the first layer of material, rolling the first layer of material by using the heating press roller 5 after the upper surface of the first layer of material is dried, spraying a layer of 50wt% silica sol solution on the upper side of the first layer of material by using the spraying pipe 9, finally spraying a layer of product material in the step S3 by using the spraying pipe 7, heating the lower surface of the first layer of material and the upper surface of the second layer of material, rolling the second layer of material after the upper surface of the second layer of material is dried, and alternately spraying the silica sol solution and the materials to obtain a blank, wherein the spraying pipe 7, the spraying pipe 9 and the heating press roller 5 are all made of the prior art, and detailed description is omitted. The temperature of the heated bottom plate 1 and the heated press roller 5 was 80 ℃.
In the step, each layer of material is sprayed, after the upper surface of the material is dried and is not adhered, the material is rolled and heated by using the heating press roller 5, so that the gas discharge is promoted, the product structure is more compact, the air holes are sealed, and the porosity in the product is reduced. In the drying and rolling process, the silica sol solution on the upper surface of the materials is contracted downwards, and a layer of silica sol solution is sprayed between each two layers of materials, so that the silica sol solution between the materials is supplemented, and the uniformity of the internal structure of the blank body is ensured.
S5, sintering, namely sintering the product obtained in the step S4, wherein the sintering temperature is 1700 ℃, the heat preservation is carried out for 8 hours, and the heating rate is 3 ℃/mm.
The formation rate of the through air holes is reduced through multi-layer and repeated rolling, and meanwhile, the depth of the open air holes is reduced, and the porosity of the sintered finished product is 7-9%.
Example 5 a method of preparing a refractory material as described above, comprising the following steps.
S1, proportioning, and weighing Al 2 O 3 55 parts of powder, siO 2 46 parts of powder, 3 parts of 45wt% silica sol solution, 5 parts of glass fiber and 1.5 parts of iron oxide red.
This step is used to weigh the components for use.
S2, mixing, firstly, mixing Al 2 O 3 Powder, siO 2 Adding the powder, the glass fiber and the iron oxide red into a mixer, mixing for 9min, and then adding 1.5 parts of 45wt% silica sol solution and mixing for 9min.
In this step, a part of the silica sol solution is used to be mixed with the remaining components, and the other part of the silica sol solution is used alone through the hose 9.
S3, stirring, namely adding the product obtained in the step S2 into a vacuum stirrer, stirring for 13 min, and standing for 36h in a vacuum environment;
in the step, the mixture is stirred in a vacuum stirrer, and air in the mixture is released, so that the porosity in the product is reduced.
S4, forming, namely spraying a layer of product material in the step S3 on the heating bottom plate 1 by using the spraying pipe 7 under a vacuum environment, heating the lower surface and the upper surface of the first layer of material, rolling the first layer of material by using the heating press roller 5 after the upper surface of the first layer of material is dried, spraying a layer of 45wt% silica sol solution on the upper side of the first layer of material by using the spraying pipe 9, finally spraying a layer of product material in the step S3 by using the spraying pipe 7, heating the lower surface of the first layer of material and the upper surface of the second layer of material, rolling the second layer of material after the upper surface of the second layer of material is dried, and alternately spraying the silica sol solution and the materials to obtain a blank, wherein the spraying pipe 7, the spraying pipe 9 and the heating press roller 5 are all made of the prior art, and detailed description is omitted. The temperature of the heated bottom plate 1 and the heated press roller 5 was 90 ℃.
In the step, each layer of material is sprayed, after the upper surface of the material is dried and is not adhered, the material is rolled and heated by using the heating press roller 5, so that the gas discharge is promoted, the product structure is more compact, the air holes are sealed, and the porosity in the product is reduced. In the drying and rolling process, the silica sol solution on the upper surface of the materials is contracted downwards, and a layer of silica sol solution is sprayed between each two layers of materials, so that the silica sol solution between the materials is supplemented, and the uniformity of the internal structure of the blank body is ensured.
S5, sintering, namely sintering the product obtained in the step S4, wherein the sintering temperature is 1730 ℃, the heat preservation is carried out for 10 hours, and the heating rate is 4 ℃/mm.
The formation rate of the through air holes is reduced through multi-layer and repeated rolling, and meanwhile, the depth of the open air holes is reduced, and the porosity of the sintered finished product is 7-9%.
Example 6 a method of preparing a refractory material as described above, comprising the following steps.
S1, proportioning, and weighing Al 2 O 3 67 parts of powder, siO 2 56 parts of powder, 4 parts of 40wt% silica sol solution, 7 parts of glass fiber and 2 parts of iron oxide red.
This step is used to weigh the components for use.
S2, mixing, firstly, mixing Al 2 O 3 Powder, siO 2 Adding the powder, the glass fiber and the iron oxide red into a mixer, mixing for 10min, then adding 2 parts of 40wt% silica sol solution, and mixing for 10min.
In this step, a part of the silica sol solution is used to be mixed with the remaining components, and the other part of the silica sol solution is used alone through the hose 9.
S3, stirring, namely adding the product obtained in the step S2 into a vacuum stirrer, stirring for 15 min, and standing for 48h in a vacuum environment;
in the step, the mixture is stirred in a vacuum stirrer, and air in the mixture is released, so that the porosity in the product is reduced.
S4, forming, namely spraying a layer of product material in the step S3 on the heating bottom plate 1 by using the spraying pipe 7 under a vacuum environment, heating the lower surface and the upper surface of the first layer of material, rolling the first layer of material by using the heating press roller 5 after the upper surface of the first layer of material is dried, spraying a layer of 40wt% silica sol solution on the upper side of the first layer of material by using the spraying pipe 9, finally spraying a layer of product material in the step S3 by using the spraying pipe 7, heating the lower surface of the first layer of material and the upper surface of the second layer of material, rolling the second layer of material after the upper surface of the second layer of material is dried, and alternately spraying the silica sol solution and the materials to obtain a blank, wherein the spraying pipe 7, the spraying pipe 9 and the heating press roller 5 are all made of the prior art, and detailed description is omitted. The temperature of the heated bottom plate 1 and the heated press roller 5 was 100 ℃.
In the step, each layer of material is sprayed, after the upper surface of the material is dried and is not adhered, the material is rolled and heated by using the heating press roller 5, so that the gas discharge is promoted, the product structure is more compact, the air holes are sealed, and the porosity in the product is reduced. In the drying and rolling process, the silica sol solution on the upper surface of the materials is contracted downwards, and a layer of silica sol solution is sprayed between each two layers of materials, so that the silica sol solution between the materials is supplemented, and the uniformity of the internal structure of the blank body is ensured.
S5, sintering, namely sintering the product obtained in the step S4, wherein the sintering temperature is 1750 ℃, the heat preservation is carried out for 12 hours, and the heating rate is 5 ℃/mm.
The formation rate of the through air holes is reduced through multi-layer and repeated rolling, and meanwhile, the depth of the open air holes is reduced, and the porosity of the sintered finished product is 7-9%.
Example 7 as shown in fig. 1 to 9, the molding apparatus in the preparation method as described above uses the heating top plate 3 when heating the upper surface of the material, and the heating top plate 3 adopts the prior art, and will not be described here again. The heating top plate 3 is driven by the top plate manipulator 2, the heating press roller 5 is driven by the press roller manipulator 4, the spraying pipe 7 is driven by the spraying manipulator 6, and the spraying pipe 9 is driven by the spraying manipulator 8.
When the device is used, firstly, the spraying manipulator 6 controls the spraying pipe 7 to spray a layer of product material in the step S3 on the heating bottom plate 1, and the spraying manipulator 8 controls the spraying pipe 9 to spray a layer of silica sol solution on the upper side of the first layer of material; then, the top plate manipulator 2 controls the heating top plate 3 to be positioned right above the heating bottom plate 1; finally, the press roller manipulator 4 controls the heating press roller 5 to roll and heat the materials. The production has high self-control degree and high production efficiency.
The front side and the back side of the heating bottom plate 1 are both connected with end plates 14 capable of moving up and down in a sliding manner, an end plate resetting device is connected between the end plates 14 and the heating bottom plate 1, a plurality of side rods 15 capable of moving up and down are both connected with the left side and the right side of the heating bottom plate 1 in a sliding manner, and a side rod resetting device is connected between the side rods 15 and the heating bottom plate 1.
When the heating press roller 5 moves in the front-back direction to roll materials, when the heating press roller 5 contacts the end plate 14 or the side rod 15, the end plate 14 or the side rod 15 is pressed down, the end plate 14 or the side rod 15 which is not contacted with the heating press roller 5 is in an initial state, the end plate 14 or the side rod 15 surrounds the heating bottom plate 1 for a circle, the materials on the heating bottom plate 1 are prevented from sliding down under the action of gravity or the heating press roller 5, the stability of the shape of the materials is kept, and meanwhile, gaps between the end plate 14 or the side rod 15 are favorable for releasing gas in the materials.
The front side and the rear side of the heating bottom plate 1 are provided with bulges 25, the bulges 25 are provided with a shell 10 which surrounds the heating bottom plate 1 for a circle, the end plate 14 and the side rods 15 are positioned in a gap between the shell 10 and the heating bottom plate 1, the end plate 14 is provided with bulge avoidance grooves 26 for avoiding the bulges 25, the end plate resetting device comprises a first U-shaped plate spring 29 positioned between the lower part of the end plate 14 and the bottom of the shell 10, the side rods 15 are of inverted-Pi shapes, and the side rod resetting device comprises a second U-shaped plate spring 23 positioned between the lower part of the side rods 15 and the bottom of the shell 10.
Specifically, an end plate spring positioning groove 20 is formed in the lower end of the end plate 14, a side rod spring positioning groove 21 is formed in the lower end of the side rod 15, and a shell spring positioning groove 22 is formed in the bottom of the shell 10.
When in use, the shell 10 provides guidance for the movement of the end plate 14 and the side rod 15, and ensures the accuracy of the movement of the end plate 14 and the side rod 15.
The shell 10 is connected with the heating bottom plate 1 through a positioning pin 27.
In use, the housing 10 is mounted in a precise position.
The spring mounting plate 12 is mounted on the bulge 25 through the connecting rod 11, the connecting bolt 24 passes through the spring mounting plate 12 and the connecting rod 11 and is in threaded connection with the bulge 25, the end plate 14 is provided with the end plate threading hole 18, the side rod 15 is provided with the side rod threading hole 19, the pull rope 17 passes through the end plate threading hole 18 and the side rod threading hole 19, and the pull rope spring 13 is connected between the end part of the pull rope 17 and the spring mounting plate 12. The housing 10 is provided with a link mounting slot 28 and a pull cord through hole 16.
When the heating press roller 5 is used, when part of the side rods 15 move downwards, the adjacent part of the side rods 15 also move downwards under the action of the pull ropes 17, so that the heating press roller 5 can move easily.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present application, and these modifications and substitutions should also be considered as being within the scope of the present application.
Claims (9)
1. The preparation method of the refractory material is characterized by comprising the following components in parts by weight:
Al 2 O 3 44-67 parts of powder;
SiO 2 37-56 parts of powder;
2-4 parts of 40-50wt% silica sol solution;
Al 2 O 3 the particle size of the powder is below 50 μm and SiO 2 The particle size of the powder is below 10 μm;
the preparation method of the refractory material comprises the following steps:
s1, matchWeighing Al 2 O 3 44-67 parts of powder, siO 2 37-56 parts of powder, and 2-4 parts of 40-50wt% silica sol solution;
s2, mixing, firstly, mixing Al 2 O 3 Powder, siO 2 Adding the powder into a mixer, mixing for 8-10min, then adding 1-2 parts of 40-50wt% silica sol solution, and mixing for 8-10min;
s3, stirring, namely adding the product obtained in the step S2 into a vacuum stirrer, stirring for 10-15 min, and standing for 24-48h in a vacuum environment;
s4, forming, namely spraying a layer of product material in the step S3 on a heating bottom plate (1) by using a spraying pipe (7) under a vacuum environment, heating the lower surface and the upper surface of the first layer of material, rolling the first layer of material by using a heating press roller (5) after the upper surface of the first layer of material is dried, spraying a layer of 40-50wt% silica sol solution on the upper side of the first layer of material by using a spraying pipe (9), finally spraying a second layer of product material in the step S3 by using a spraying pipe (7), heating the lower surface of the first layer of material and the upper surface of the second layer of material, rolling the second layer of material after the upper surface of the second layer of material is dried, and alternately spraying the silica sol solution and the material to obtain a blank;
s5, sintering, namely sintering the product obtained in the step S4, wherein the sintering temperature is 1700-1750 ℃, the heat preservation is carried out for 8-12 hours, and the heating rate is 3-5 ℃/mm.
2. The method for producing a refractory according to claim 1, further comprising the following components in parts by weight:
3-7 parts of glass fiber.
3. The method of producing a refractory according to claim 2, wherein the glass fiber has a diameter of 10 μm or less.
4. The method for producing a refractory according to claim 1, further comprising the following components in parts by weight:
1-2 parts of iron oxide red.
5. The method for producing a refractory material according to claim 1, wherein a heating top plate (3) is used when heating the upper surface of the material, the heating top plate (3) is driven by a top plate manipulator (2), the heating press roller (5) is driven by a press roller manipulator (4), the material spraying pipe (7) is driven by a material spraying manipulator (6), and the glue spraying pipe (9) is driven by a glue spraying manipulator (8).
6. The method for preparing the refractory material according to claim 1, wherein the front side and the rear side of the heating bottom plate (1) are both connected with end plates (14) capable of moving up and down in a sliding manner, an end plate resetting device is connected between the end plates (14) and the heating bottom plate (1), a plurality of side rods (15) capable of moving up and down are both connected with the left side and the right side of the heating bottom plate (1) in a sliding manner, and a side rod resetting device is connected between the side rods (15) and the heating bottom plate (1).
7. The refractory material preparation method according to claim 6, wherein the front and rear sides of the heating bottom plate (1) are provided with protrusions (25), the protrusions (25) are provided with a shell (10) surrounding the heating bottom plate (1) in a circle, the end plate (14) and the side rods (15) are positioned in a gap between the shell (10) and the heating bottom plate (1), the end plate (14) is provided with protrusion avoidance grooves (26) for avoiding the protrusions (25), the end plate resetting device comprises a first U-shaped plate spring (29) positioned between the lower part of the end plate (14) and the bottom of the shell (10), the side rods (15) are inverted-Pi-shaped, and the side rod resetting device comprises a second U-shaped plate spring (23) positioned between the lower part of the side rods (15) and the bottom of the shell (10).
8. A method of producing a refractory material according to claim 7, wherein the housing (10) is connected to the heating soleplate (1) by means of a locating pin (27).
9. The method for preparing the refractory material according to claim 7, wherein the spring mounting plate (12) is mounted on the boss (25), the end plate threading hole (18) is formed in the end plate (14), the side rod threading hole (19) is formed in the side rod (15), the pull rope (17) passes through the end plate threading hole (18) and the side rod threading hole (19), and the pull rope spring (13) is connected between the end part of the pull rope (17) and the spring mounting plate (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310759832.0A CN116496077B (en) | 2023-06-27 | 2023-06-27 | Refractory material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310759832.0A CN116496077B (en) | 2023-06-27 | 2023-06-27 | Refractory material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116496077A CN116496077A (en) | 2023-07-28 |
| CN116496077B true CN116496077B (en) | 2023-08-29 |
Family
ID=87323423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310759832.0A Active CN116496077B (en) | 2023-06-27 | 2023-06-27 | Refractory material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116496077B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117342878A (en) * | 2023-10-24 | 2024-01-05 | 北京荣邦汇鑫科技有限责任公司 | Refractory material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296921A (en) * | 1978-08-28 | 1981-10-27 | Aikoh Co., Ltd. | Lance pipe for refining and method of making the same |
| CN107244931A (en) * | 2017-05-31 | 2017-10-13 | 长兴华悦耐火材料厂 | A kind of cement kiln lining self-bonding wet type gunning refractory |
| CN108675810A (en) * | 2018-07-13 | 2018-10-19 | 贵州紫云月华新材料有限公司 | A kind of production method of silica refractory |
| CN110819140A (en) * | 2018-08-10 | 2020-02-21 | 中环海化(厦门)船舶智能涂料有限公司 | Thick-coating single-component inorganic high-temperature-resistant anticorrosive coating for new energy electric vehicle |
| CN112707740A (en) * | 2020-12-31 | 2021-04-27 | 山东潍耐节能材料有限公司 | Siliceous heat-insulating brick for coke oven and production process thereof |
| CN113954330A (en) * | 2021-09-27 | 2022-01-21 | 安徽百维新材料有限公司 | Heat-resistant flame-retardant gel heat-insulation board |
-
2023
- 2023-06-27 CN CN202310759832.0A patent/CN116496077B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296921A (en) * | 1978-08-28 | 1981-10-27 | Aikoh Co., Ltd. | Lance pipe for refining and method of making the same |
| CN107244931A (en) * | 2017-05-31 | 2017-10-13 | 长兴华悦耐火材料厂 | A kind of cement kiln lining self-bonding wet type gunning refractory |
| CN108675810A (en) * | 2018-07-13 | 2018-10-19 | 贵州紫云月华新材料有限公司 | A kind of production method of silica refractory |
| CN110819140A (en) * | 2018-08-10 | 2020-02-21 | 中环海化(厦门)船舶智能涂料有限公司 | Thick-coating single-component inorganic high-temperature-resistant anticorrosive coating for new energy electric vehicle |
| CN112707740A (en) * | 2020-12-31 | 2021-04-27 | 山东潍耐节能材料有限公司 | Siliceous heat-insulating brick for coke oven and production process thereof |
| CN113954330A (en) * | 2021-09-27 | 2022-01-21 | 安徽百维新材料有限公司 | Heat-resistant flame-retardant gel heat-insulation board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116496077A (en) | 2023-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116496077B (en) | Refractory material and preparation method thereof | |
| US7094285B2 (en) | Inorganic matrix compositions, composites incorporating the matrix, and process of making the same | |
| EP3162778B1 (en) | Method for preparing porous ceramics | |
| US6969422B2 (en) | Inorganic matrix composition and composites incorporating the matrix composition | |
| CN1225329C (en) | Binder compositions for bonding particulate material | |
| CN105294140A (en) | Porous ceramics preparation method, porous ceramics and application thereof | |
| WO2006030738A1 (en) | Coating material for platinum material, platinum material coated with such coating material, and glass manufacturing apparatus | |
| WO2022193663A1 (en) | Atomization core assembly, atomization assembly, atomizer, electronic atomization apparatus, and electronic cigarette | |
| CN106007524B (en) | A kind of ground polymers wall thermal insulation board and preparation method thereof that porosity gradient is controllable | |
| CN110395946A (en) | A kind of preparation method of the aeroge for exterior-wall heat insulation-glass bead composite mortar | |
| EP4393896A1 (en) | Fiber-reinforced silicious module and preparation method | |
| CN113103406B (en) | Processing technology of outer wall homogeneous modified fireproof insulation board | |
| CN104876595A (en) | Method and equipment for preparing zirconia metering nozzle employing magnesium oxide nano powder | |
| CN112339358A (en) | High-temperature-resistant nano micropore heat insulation material and preparation method thereof | |
| CN113651334A (en) | Preparation method of rare earth doped silicon dioxide aerogel | |
| CN109161233A (en) | A kind of covercoat paste of platinum heater strip and preparation method thereof and coating unit | |
| KR101297018B1 (en) | Glass fiber board and preparing method of the same | |
| CN202808586U (en) | Tablet and tablet integrated exhaust pipe using same | |
| CN115010457A (en) | Superfine ceramic fiber cotton thermal insulation pipe shell and preparation method thereof | |
| CN112500191A (en) | Preparation method of ultralight foamed concrete composite thermal insulation material | |
| CN111718180A (en) | Chopped carbon fiber reinforced aluminum silicate ceramic matrix composite and preparation method thereof | |
| CN108484095A (en) | A kind of preparation method of high-strength heat-insulating type aerogel material | |
| CN220091199U (en) | Mixing device of vitrified micro bubble heat preservation rubber powder | |
| CN104387009A (en) | Method for preparing exterior wall heat insulation board from building inorganic garbage | |
| CN221685014U (en) | Quartz sand drying equipment |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |