CN113735558B - Production process suitable for large-size ceramic pipe products - Google Patents

Production process suitable for large-size ceramic pipe products Download PDF

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CN113735558B
CN113735558B CN202111075833.0A CN202111075833A CN113735558B CN 113735558 B CN113735558 B CN 113735558B CN 202111075833 A CN202111075833 A CN 202111075833A CN 113735558 B CN113735558 B CN 113735558B
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ceramic pipe
thickness
production process
ceramic
drying
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CN113735558A (en
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孙允
倪曌青
李卫宏
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Hunter Ceramics China Co ltd
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Hunter Ceramics China Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/04—Clay; Kaolin
    • 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
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • 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
    • C04B33/00—Clay-wares
    • C04B33/30—Drying methods
    • 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
    • C04B33/00—Clay-wares
    • C04B33/32—Burning methods
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/14—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements stone or stone-like materials, e.g. ceramics concrete; of glass or with an outer layer of stone or stone-like materials or glass
    • E04F13/142—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements stone or stone-like materials, e.g. ceramics concrete; of glass or with an outer layer of stone or stone-like materials or glass with an outer layer of ceramics or clays
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • 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
    • C04B2235/6021—Extrusion moulding
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    • 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
    • C04B2235/606—Drying
    • 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
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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

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Abstract

The invention relates to a production process suitable for large-size ceramic pipe (also called ceramic stick) products, which is specially developed by the inventor aiming at the large-size ceramic pipe products with specific structures; the large-sized ceramic pipe product with the specific structure is produced by adopting the production process, so that the bending stress and the deformation deflection of the unit section of the ceramic pipe product can be greatly reduced, the technical bottleneck that the large-sized ceramic pipe product deforms due to the action of self weight is solved, only the peripheral parts shrink and shrink uniformly in the process of drying and firing the ceramic pipe, the ceramic pipe product with a smoother surface can be obtained, and the yield is higher.

Description

Production process suitable for large-size ceramic pipe products
Technical Field
The invention relates to a production process suitable for large-size ceramic pipe products, and belongs to the technical field of building curtain walls.
Background
The curtain wall is the outer wall enclosure of the building, does not bear the weight, hangs like a curtain, so is also called as a curtain wall, and is a light wall with decorative effect commonly used by modern large-scale and high-rise buildings.
The curtain wall is made of pottery pipe (named pottery rod) as one new kind of externally hung decorating material introduced from abroad and produced with pottery clay, shale and other material and through grinding, extrusion and high temperature sintering. The ceramic pipe has the advantages of beautiful appearance, heat insulation, sound insulation, corrosion resistance and the like, is pollution-free, green and environment-friendly, light in dead weight, good in shock and freeze resistance, sound insulation and noise reduction, can also play a role in shading sun and heat insulation, and meets the national requirements for building energy conservation.
In the prior art, a plurality of monomer ceramic tubes are combined to form a ceramic tube unit, and then the ceramic tube unit is combined with a support structure to form a curtain wall.
In the prior art, a ceramic pipe product is generally produced by adopting a wet extrusion process. The conventional ceramic pipe product has a tubular structure with two open ends, and as shown in the schematic cross-sectional view of the conventional single-cavity ceramic pipe shown in fig. 1, a rectangular column single cavity 2 'is formed inside the ceramic pipe 10', and the main body of the ceramic pipe 10 'is the pipe wall part 1' (also called as the wall thickness part 1 ') surrounding the single cavity 2', however, the single-cavity ceramic pipe is only suitable for the ceramic pipe product with a smaller cross-section. For ceramic pipe products with cross-sectional dimensions exceeding 100 x 100mm, the green (soft) body which has not yet been dried is easily deformed by self-weight during extrusion.
In order to reduce the deformation, the large-sized ceramic tube is designed into a multi-cavity structure, as shown in fig. 2 and 3, and the cross section (geometrical shape such as rectangle, circle, etc.) of the conventional multi-cavity structure ceramic tube is schematically shown. However, in the drying and firing processes of the conventional multi-cavity ceramic tube, on one hand, shrinkage is not uniform due to different shrinkage rates of different cavity parts, so that rib parts are sunken or protruded, and the surface is uneven; on the other hand, the multi-cavity structure causes poor hot air circulation, fast surface shrinkage, slow shrinkage of the inner wall of the cavity and unbalance stress generated, and when the stress exceeds the strength of the blank, the blank can crack or even crack; in addition, the space of a single cavity is small, and only a small-sized fitting (fixed connection fitting) suitable for the size of the cavity can be adopted, but the weight of the unit volume of the ceramic pipe is large, so that the safety coefficient after installation is not high.
Therefore, the development of a production process suitable for large-size ceramic pipe products is urgently needed in the field.
Disclosure of Invention
In order to solve the technical problems, the invention provides a production process suitable for large-size ceramic pipe products, wherein,
the production process comprises the following steps of:
step 1), selecting granular ceramic pipe formula raw materials, uniformly mixing the ceramic pipe formula raw materials, adding water, uniformly stirring, and extruding to obtain a flaky pug;
step 2), feeding the flaky pug obtained in the step 1) into a vacuum forming machine for extrusion, forming through a ceramic pipe die, and cutting according to the required length to obtain a wet blank body; penetrating an auxiliary steel pipe into the hollow cavity of the wet blank body so as to transfer the wet blank body to a blank storage rack,
step 3), the wet green bodies are conveyed into a shuttle drying kiln through the green storage frame, and forced air drying is carried out for 48-72 hours; wherein the direction of the air blast is from one end of the wet green body to the other end along the axial direction of the wet green body;
the forced air drying is divided into three stages, and the parameters of each stage are set as follows:
in the first stage, the relative humidity of air in the drying kiln is set to be 75-100%, the drying temperature is set to be 25-45 ℃, and the drying time is set to be 20-30 hours;
in the second stage, the relative humidity of air in the drying kiln is set to be 45-75%, the drying temperature is set to be 45-75 ℃, and the drying time is set to be 15-25 hours;
in the third stage, setting the relative humidity of air in the drying kiln to be 5-45%, the drying temperature to be 75-110 ℃ and the drying time to be 10-20 hours;
step 4), sintering the dry blank obtained in the step 3) for 36-60 hours in a shuttle sintering kiln by using a silicon carbide rod string; cooling to obtain the ceramic tube product; wherein the firing temperature is 1100-1200 ℃;
the ceramic tube product is provided with a tubular structure with two open ends, a hollow cavity extending along the axial direction is arranged in the ceramic tube product, the ceramic tube comprises a thick wall part surrounding the hollow cavity, wherein,
a plurality of through holes extending along the axial direction are formed in the wall thickness part;
the plurality of through holes are uniformly spaced in a surrounding manner at the thickness portion as viewed in a cross section of the thickness portion;
a first wall thickness part is formed between the outer side edge formed by the through holes and the outer wall surface of the ceramic pipe, a second wall thickness part is formed between the inner side edge formed by the through holes and the inner wall surface of the ceramic pipe, and a third wall thickness part is formed between the outer side edge and the inner side edge formed by the through holes;
the thickness of the first thickness portion and the thickness of the second thickness portion both fall within a range of 5-10 mm;
the thickness of the wall thickness part is 15-55 mm; and the total area of the outer contour of the cross section of the ceramic tube is 10000mm or more 2 250000mm or less 2 。
Preferably, the thickness of the first thickness portion is equal to the thickness of the second thickness portion.
Preferably, the minimum distance between every two adjacent through holes is 5-10 mm.
Preferably, the cross section area of any one through hole is 20-500 mm 2 。
Preferably, the cross section of the through hole is square, trapezoid, circle, semicircle, ellipse or their approximate figures.
Preferably, the cross section of the through hole is semicircular or approximately semicircular, the plane part of the through hole faces the inner wall surface of the ceramic pipe, and the cambered surface part of the through hole faces the outer wall surface of the ceramic pipe.
Preferably, the cross section of the ceramic pipe is rectangular, circular, triangular, trapezoidal or the similar figures thereof.
The invention provides a production process suitable for large-specification ceramic pipe products, which is specially developed by the inventor aiming at the large-specification ceramic pipe products with specific structures; the large-sized ceramic pipe product with the specific structure is produced by adopting the production process, so that the bending stress and the deformation deflection of the unit section of the ceramic pipe product can be greatly reduced, the technical bottleneck that the large-sized ceramic pipe product deforms due to the action of self weight is solved, only the peripheral parts shrink and shrink uniformly in the process of drying and firing the ceramic pipe, the ceramic pipe product with a smoother surface can be obtained, and the yield is higher.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional single-cavity structured ceramic pipe;
fig. 2 is a schematic cross-sectional view of a conventional multi-chamber structured ceramic pipe (rectangular pillar structure);
fig. 3 is a schematic cross-sectional view of a conventional ceramic pipe (circular pillar structure) of a multi-chamber structure;
fig. 4 is a schematic view of the overall structure of the ceramic pipe according to embodiment 1 of the present invention;
FIG. 5 is a schematic cross-sectional view of a ceramic pipe according to example 1 of the present invention;
FIG. 6 is a schematic cross-sectional view of a ceramic tube according to an alternative embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of a ceramic tube according to another alternative embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of another alternate embodiment of the ceramic tube of the present invention;
fig. 9 is a schematic cross-sectional view of another alternate embodiment of the ceramic tube of the present invention;
fig. 10 is a schematic view showing the overall structure of a ceramic pipe according to another alternative embodiment of the present invention;
fig. 11 is a schematic view showing the overall structure of a ceramic pipe according to another alternative embodiment of the present invention;
fig. 12 is a schematic view showing the overall structure of a ceramic pipe according to another alternative embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus, a repetitive description thereof will be omitted.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In some instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the invention.
Example 1
The embodiment 1 of the invention provides a production process suitable for large-size ceramic pipe products.
The large-sized ceramic pipe product produced in example 1 of the present invention has an overall structure as shown in fig. 4, and has a tubular structure with two open ends, a hollow cavity 2 extending in an axial direction is formed inside the tubular structure, and a ceramic pipe 10 includes a thick wall portion 1 surrounding the hollow cavity 2.
With regard to the thickness part 1, also referred to as a tube wall part, a part of the wall thickness of the ceramic tube is integrally formed around the hollow cavity 2.
Specifically, in the present embodiment, the tubular structure of the ceramic pipe 10 is a rectangular tubular structure, and the hollow cavity 2 is also a rectangular column.
As shown in fig. 5, in the cross-sectional view of the ceramic pipe 10, a plurality of through holes 3 extending in the axial direction are formed in the thick wall portion 1.
In one embodiment of the present invention, a plurality of through holes 3 are uniformly spaced in a surrounding manner at the thickness portion 1 as viewed in cross section; a first thickness part 11 is formed between the outer edge formed by the through holes 3 and the outer wall surface X of the ceramic pipe 10 (the thickness of the first thickness part 11 is set as L1); a second thickness portion 12 is formed between an inner edge formed by the plurality of through holes 3 and an inner wall surface Y of the ceramic pipe 10 (the thickness of the second thickness portion 12 is set to L2); the third wall thickness portion 13 is formed between the outer edge and the inner edge which are formed by the plurality of through holes 3 together.
In a specific embodiment of the present invention, the thickness L1 of the first thickness portion 11 is equal to the thickness L2 of the second thickness portion 12; that is, two equal thicknesses, i.e., the upper and lower thicknesses, are formed between the through hole 3 and the outer wall surface X and between the through hole 3 and the inner wall surface Y.
Preferably, the thickness of the first thickness portion 11 and the thickness of the second thickness portion 12 both fall within the range of 5 to 10 mm. In the present embodiment, L1 and L2 are both 7.5 mm;
the ceramic pipe 10 structure is more suitable for large-size ceramic pipe products, and in a specific embodiment of the invention, the thickness H of the wall thickness part 1 is 15-55 mm; and the total area of the outer contour of the cross section of the ceramic tube is 10000mm or more 2 250000mm or less 2 。
In a preferred embodiment of the present invention, the cross section of the ceramic tube 10 is rectangular, and the outer dimension of the cross section is not less than 100mm x 100mm and not more than 500mm x 500 mm.
Specifically, in the present embodiment, the outer dimension is 200 × 300mm, and the thickness H of the wall thickness portion 1 is about 24 to 32 mm.
In an alternative embodiment of the invention, the outer dimension is 200 x 300mm, and the thickness H of the wall thickness 1 is about 28-32 mm.
In another alternative embodiment of the invention, the outer dimension is 200 x 300mm and the thickness H of the wall thickness 1 is about 24 to 27 mm.
In a specific embodiment of the present invention, the minimum distance between every two adjacent through holes 3 is 5 to 10 mm. In the present embodiment, the minimum distance L4 between every two adjacent through holes 3 is about 5.5 mm.
The ceramic tube 10 adopting the scheme of the invention still maintains a middle large cavity structure as a whole, has good hot air circulation, ensures that the outer wall surface of the ceramic tube 10 and the inner wall surface of the cavity can contract synchronously, generates balanced stress and does not generate blank cracks; in addition, the hollow cavity 2 has a large space, and large-size fastening fittings can be adopted, so that the requirement of individuation of architectural design is met.
More importantly, the single-cavity (hollow large cavity) structure in the prior art cannot adapt to large-size ceramic stick products; on the basis of reserving the hollow large-cavity structure, the ceramic pipe is provided with a plurality of through holes 3 uniformly distributed at intervals in a surrounding manner in the wall thickness part 1; the first wall thickness part is formed between the outer side edge formed by the through holes 3 and the outer wall surface X, and the second wall thickness part is formed between the inner side edge formed by the through holes 3 and the inner wall surface Y, so that an inner-outer double-wall structure is formed.
In one embodiment of the present invention, the cross-sectional area of the through-hole 3 is 20 to 500mm 2 。
In the present embodiment in particular, the cross-sectional shape of each through-hole 3 is the same, and the cross-sectional area of each through-hole 3 is about 435mm 2 。
In a specific embodiment of the present invention, the cross-section of the through-hole 3 is square, trapezoidal, circular, semicircular, oval or their approximate figures.
In the present embodiment, the cross section of the through hole 3 is square. Fig. 4 and 5 show cross-sectional views in which the cross-section of the through-hole 3 is a standard square; the cross section of the through hole 3 may be approximately square, for example, in actual production, four corners of the cross section of the through hole 3 may be made into smooth corners.
In an alternative embodiment of the present invention, the cross-section of the through-hole 3 is approximately semicircular, and the flat surface portion of the through-hole 3 faces the inner wall surface Y of the ceramic tube 10, and the arc surface portion of the through-hole 3 faces the outer wall surface X of the ceramic tube 10, as shown in fig. 6.
In another alternative embodiment, the cross-section of the through-hole 3 may be trapezoidal or approximately trapezoidal, see fig. 7.
In another alternative embodiment, the cross-section of the through-hole 3 may also be circular or approximately circular, see fig. 8.
In another alternative embodiment, the cross-section of the through-hole 3 may also be oval or approximately oval, see fig. 9.
Aiming at the large-size ceramic pipe product with the specific structure, the inventor of the application develops a production process suitable for the product. In a particular embodiment of the present application, the production process comprises the following steps carried out in sequence:
step 1), selecting particle-grade ceramic pipe formula raw materials, uniformly mixing the ceramic pipe formula raw materials, adding water, uniformly stirring, and extruding to obtain a flaky pug;
step 2), feeding the flaky pug obtained in the step 1) into a vacuum forming machine for extrusion, forming the pug through a ceramic pipe die, and cutting the pug according to the required length to obtain a wet blank body; the auxiliary steel pipe penetrates into the hollow cavity of the wet blank body, so that the wet blank body is transferred to a blank storage rack,
step 3), sending the wet blank body into a shuttle type drying kiln through a blank storage frame, and carrying out forced air drying for 48-72 hours; wherein the direction of the air blast is from one end of the wet blank to the other end along the axial direction of the wet blank;
the forced air drying is divided into three stages, and the parameters of each stage are set as follows:
in the first stage, the relative humidity of air in a drying kiln is set to be 75-100%, the drying temperature is set to be 25-45 ℃, and the drying time is set to be 20-30 hours;
in the second stage, the relative humidity of air in the drying kiln is set to be 45-75%, the drying temperature is set to be 45-75 ℃, and the drying time is set to be 15-25 hours;
in the third stage, the relative humidity of air in the drying kiln is set to be 5-45%, the drying temperature is set to be 75-110 ℃, and the drying time is set to be 10-20 hours;
step 4), firing the dry blank obtained in the step 3) for 36-60 hours in a shuttle firing kiln by using a silicon carbide rod string frame; cooling to obtain the ceramic pipe product; wherein the sintering temperature is 1100-1200 ℃.
Specifically, in this embodiment, the granular ceramic pipe formulation raw material in step 1) may be a commercially available granular ceramic pipe formulation raw material.
The parameter setting of the step 3) and the step 4) is very critical. The inventor of this application adjusts the settlement to the big specification pottery pipe product of specific structure, can greatly reduced pottery pipe product unit cross-section's bending stress and deformation amount of deflection, solved big specification pottery pipe product because of the technical bottleneck that the dead weight effect warp to in the dry and technological process of firing burning till of pottery pipe, only the position shrink all around, the shrink is even, can obtain the pottery pipe product that the surface is more level and smooth, has higher yield.
Specifically, the yield of the large-size ceramic pipe product with the specific structure produced by the production process is about 90%, and the deformation deflection is less than or equal to +/-0.3%.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (7)

1. A production process suitable for large-size ceramic pipe products is characterized by comprising the following steps:
the production process comprises the following steps of:
step 1), selecting particle-grade ceramic pipe formula raw materials, uniformly mixing the ceramic pipe formula raw materials, adding water, uniformly stirring, and extruding to obtain a flaky pug;
step 2), feeding the flaky pug obtained in the step 1) into a vacuum forming machine for extrusion, forming the pug through a ceramic pipe die, and cutting the pug according to the required length to obtain a wet blank body; penetrating an auxiliary steel pipe into the hollow cavity of the wet blank body so as to transfer the wet blank body to a blank storage rack,
step 3), feeding the wet green bodies into a shuttle drying kiln through the green body storage frame, and performing forced air drying for 48-72 hours; wherein the direction of the air blast is from one end of the wet green body to the other end along the axial direction of the wet green body;
the forced air drying is divided into three stages, and the parameters of each stage are set as follows:
in the first stage, the relative humidity of air in the drying kiln is set to be 75-100%, the drying temperature is set to be 25-45 ℃, and the drying time is set to be 20-30 hours;
in the second stage, the relative humidity of air in the drying kiln is set to be 45-75%, the drying temperature is set to be 45-75 ℃, and the drying time is set to be 15-25 hours;
in the third stage, setting the relative humidity of air in the drying kiln to be 5-45%, the drying temperature to be 75-110 ℃ and the drying time to be 10-20 hours;
step 4), firing the dry blank obtained in the step 3) for 36-60 hours in a shuttle firing kiln by using a silicon carbide rod string frame; cooling to obtain the ceramic pipe product; wherein the firing temperature is 1100-1200 ℃;
the ceramic tube product is provided with a tubular structure with two open ends, a hollow cavity extending along the axial direction is arranged in the ceramic tube product, the ceramic tube comprises a thick wall part surrounding the hollow cavity, wherein,
a plurality of through holes extending along the axial direction are formed in the wall thickness part;
the plurality of through holes are uniformly spaced at the thickness portion in a surrounding manner when viewed from the cross section of the thickness portion;
a first thickness part is formed between the outer edge formed by the through holes and the outer wall surface of the ceramic pipe, a second thickness part is formed between the inner edge formed by the through holes and the inner wall surface of the ceramic pipe, and a third thickness part is formed between the outer edge and the inner edge formed by the through holes;
the thickness of the first thickness portion and the thickness of the second thickness portion both fall within a range of 5-10 mm;
the thickness of the wall thickness part is 15-55 mm; and the total area of the outer contour of the cross section of the ceramic tube is 10000mm or more 2 250000mm or less 2 。
2. The production process according to claim 1, wherein:
the thickness of the first thickness portion is equal to the thickness of the second thickness portion.
3. The production process according to claim 2, wherein:
and the minimum distance between every two adjacent through holes is 5-10 mm.
4. The production process according to claim 3, wherein:
the cross-sectional area of any one of the through holes is 20-500 mm 2 。
5. The production process according to any one of claims 1 to 4, wherein:
the cross section of the through hole is square, trapezoid, circle, semicircle, ellipse or approximate figures thereof.
6. The production process according to claim 5, wherein:
the cross section of the through hole is semicircular or approximately semicircular, the plane part of the through hole faces the inner wall surface of the ceramic pipe, and the cambered surface part of the through hole faces the outer wall surface of the ceramic pipe.
7. The production process according to any one of claims 1 to 4, wherein:
the cross section of the ceramic pipe is rectangular, circular, triangular, trapezoidal or similar figures thereof.
CN202111075833.0A 2021-09-14 2021-09-14 Production process suitable for large-size ceramic pipe products Active CN113735558B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102353243A (en) * 2011-07-13 2012-02-15 新嘉理（江苏）陶瓷有限公司 Method for drying irregular ceramic plates and rods
CN204435711U (en) * 2015-01-29 2015-07-01 江苏金久科技新材料有限公司 A kind of plate rod is integrally made pottery plate
CN214169477U (en) * 2020-11-13 2021-09-10 中铁广州工程局集团深圳工程有限公司 Decorative pottery rod

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102353243A (en) * 2011-07-13 2012-02-15 新嘉理（江苏）陶瓷有限公司 Method for drying irregular ceramic plates and rods
CN204435711U (en) * 2015-01-29 2015-07-01 江苏金久科技新材料有限公司 A kind of plate rod is integrally made pottery plate
CN214169477U (en) * 2020-11-13 2021-09-10 中铁广州工程局集团深圳工程有限公司 Decorative pottery rod

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