CN115448694A - Improved powdery clay sintered ceramsite and preparation method thereof - Google Patents
Improved powdery clay sintered ceramsite and preparation method thereof Download PDFInfo
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- 239000004927 clay Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 7
- 238000005469 granulation Methods 0.000 claims abstract description 5
- 230000003179 granulation Effects 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 24
- 239000002689 soil Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 12
- 244000062793 Sorghum vulgare Species 0.000 claims 1
- 235000019713 millet Nutrition 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000010304 firing Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 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
- C04B33/04—Clay; Kaolin
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- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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- 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
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- 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
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- 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
Abstract
The invention discloses improved powdery clay sintered ceramsite and a preparation method thereof, wherein the formula comprises the following steps: the low-loss-on-ignition powdery clay comprises the following components in parts by weight: 90-100 parts of low-loss-on-ignition powdery clay, 0-6 parts of bran coat powder and 15-15.9 parts of water; the preparation method comprises the following steps: step one, drying raw materials; step two, batching; step three, stirring; step four, aging; step five, granulating; step six, preheating; step seven, roasting; step eight, cooling; the invention relates to a method for preparing ceramsite, which comprises the steps of metering low-ignition-loss powdery clay, a proper amount of bran powder and water, then feeding the mixture into a stirrer for mixing and extrusion, then feeding the mixture into a granulator for granulation and molding, and firing the mixture for 10min at a temperature of 1175 ℃, at a heating rate of 10 ℃/min and at a constant temperature, so as to obtain the ceramsite, wherein the strength of the ceramsite obtained by firing is improved.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to improved powdery clay sintered ceramsite and a preparation method thereof.
Background
Ceramsite, as its name implies, is a ceramic particle. Most of the appearance characteristics of the ceramsite are round or oval spheres, but some imitation gravel ceramsite are not round or oval spheres but are irregular gravel. But the existing powdery clay fired ceramsite has low expansion rate, the inside of the ceramsite is solid, and the density is more than 1000kg/m for high speed cultivation; these characteristics limit the application of the powdery clay sintered ceramsite; the problems are generally caused by insufficient loss on ignition of the clay powder, and therefore, it is necessary to design an improved clay powder sintered ceramsite and a preparation method thereof.
Disclosure of Invention
The invention aims to provide an improved powdery clay sintered ceramsite and a preparation method thereof, which are used for solving the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: an improved powdery clay sintered ceramsite comprises the following components in percentage by weight: the low-loss-on-ignition powdery clay comprises the following components in parts by weight: 90-100 parts of low-loss-on-ignition powdery clay, 0-6 parts of bran coat powder and 15-15.9 parts of water.
Preferably, the ratio of the bran powder to the low-loss-on-ignition farinaceous clay is 0.00-0.06, and the water is 15% of the total amount of the bran powder and the farinaceous clay, and the low-loss-on-ignition farinaceous clay is prepared from raw materials including, but not limited to, strongly weathered gravelly-containing soil, strongly weathered sandy soil and mucky soil.
Preferably, the weight parts of the components are 100 parts of low-loss-on-ignition powdery clay and 15 parts of water respectively.
Preferably, the weight parts of the components are 100 parts of low-loss-on-ignition farinaceous clay, 2 parts of bran powder and 15.3 parts of water respectively.
Preferably, the weight parts of the components are 100 parts of low-loss-on-ignition farinaceous clay, 4 parts of bran powder and 15.6 parts of water respectively.
Preferably, the weight parts of the components are 100 parts of low-ignition-loss farinaceous clay, 6 parts of bran coat powder and 15.9 parts of water respectively.
A preparation method of improved powdery clay sintered ceramsite comprises the following steps: step one, drying raw materials; step two, batching; step three, stirring; step four, aging; step five, granulating; step six, preheating; step seven, roasting; step eight, cooling;
preparing raw materials required for preparing the sintered ceramsite in the first step, and crushing the raw materials prepared except water;
in the second step, the raw materials dried in the first step and the required water are mixed according to a certain proportion;
in the third step, the mixed raw materials are stirred, so that various raw materials are uniformly mixed, the stirring time is 3-10min, and the stirring speed in the stirring process is 200-300r/min;
in the fourth step, the material stirred in the third step is aged;
in the fifth step, the aged material is sent into a stirrer to be mixed and extruded, and then is sent into a granulator to be granulated and molded to prepare spherical or cylindrical particles with the particle size of 3-8 mm;
in the sixth step, the spherical or cylindrical particles are preheated by using a tubular resistance furnace, and the preheating process comprises the steps of heating at the speed of 10 ℃/min for about 40min, heating to 400 ℃ at room temperature, and keeping the constant temperature of 400 ℃ for 30min;
in the seventh step, the tubular resistance furnace is set to be heated up according to the speed of 10 ℃/min, the temperature is raised from 400 ℃ to 1175 ℃, and then the constant-temperature roasting treatment is carried out for 10 min;
and step eight, finishing the setting program of the tubular resistance furnace, stopping running, cooling to room temperature under the condition of natural cooling, and taking out the ceramsite.
Preferably, in the step one, the particle size of the crushed raw material is 0-0.08mm, and then the crushed raw material is dried, and the water content of the dried raw material is 0-6%.
Compared with the prior art, the invention has the beneficial effects that: the invention relates to a method for preparing ceramsite, which comprises the steps of metering low-ignition-loss powdery clay, a proper amount of bran powder and water, then feeding the mixture into a stirrer for mixing and extrusion, then feeding the mixture into a granulator for granulation and molding, and firing the mixture for 10min at a temperature of 1175 ℃, at a heating rate of 10 ℃/min and at a constant temperature, so as to obtain the ceramsite, wherein the strength of the ceramsite obtained by firing is improved.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention:
example 1:
an improved powdery clay sintered ceramsite comprises the following components in percentage by weight: the low-ignition loss powdery clay comprises the following components in parts by weight: 100 parts of low-loss-on-ignition silty clay and 15 parts of water, wherein the low-loss-on-ignition silty clay is prepared by taking mucky soil as a raw material.
A preparation method of improved powdery clay sintered ceramsite comprises the following steps: step one, drying raw materials; step two, batching; step three, stirring; step four, aging; step five, granulation; step six, preheating; step seven, roasting; step eight, cooling;
in the first step, preparing raw materials required for preparing sintered ceramsite, crushing the raw materials prepared except water, wherein the particle size of the crushed raw materials is 06mm, and then drying the crushed raw materials, wherein the water content of the dried raw materials is 5%;
in the second step, the raw materials dried in the first step and the required water are mixed according to a certain proportion;
in the third step, the mixed raw materials are stirred, so that various raw materials are uniformly mixed, the stirring time is 7min, and the stirring speed in the stirring process is 250r/min;
in the fourth step, the material stirred in the third step is aged;
in the fifth step, the aged material is sent into a stirrer to be mixed and extruded, and then is sent into a granulator to be granulated and molded to prepare spherical or cylindrical particles with the particle size of 6 mm;
in the sixth step, the spherical or cylindrical particles are preheated by using a tubular resistance furnace, and the preheating process is that the temperature is increased at the speed of 10 ℃/min for about 40min, the temperature is increased to 400 ℃ at room temperature, and then the temperature is kept at the constant temperature of 400 ℃ for 30min;
in the seventh step, the tubular resistance furnace is set to be heated up according to the speed of 10 ℃/min, the temperature is raised from 400 ℃ to 1175 ℃, and then the constant-temperature roasting treatment is carried out for 10 min;
and step eight, finishing the setting program of the tubular resistance furnace, stopping running, cooling to room temperature under the condition of natural cooling, and taking out the ceramsite.
Example 2:
an improved powdery clay sintered ceramsite comprises the following components in percentage by weight: the low-loss-on-ignition powdery clay comprises the following components in parts by weight: 100 parts of low-loss-on-ignition powdery clay, 2 parts of bran powder and 15.3 parts of water, wherein the low-loss-on-ignition powdery clay is prepared from strong weathering and sandy soil as raw materials.
A preparation method of improved powdery clay sintered ceramsite comprises the following steps: step one, drying raw materials; step two, batching; step three, stirring; step four, aging; step five, granulating; step six, preheating; step seven, roasting; step eight, cooling;
preparing raw materials required for preparing sintered ceramsite, crushing the raw materials prepared except water, wherein the particle size of the crushed raw materials is 06mm, and drying the crushed raw materials, wherein the water content of the dried raw materials is 5%;
in the second step, the raw materials dried in the first step and the required water are mixed according to a certain proportion;
in the third step, the mixed raw materials are stirred, so that various raw materials are uniformly mixed, the stirring time is 7min, and the stirring speed in the stirring process is 250r/min;
in the fourth step, the material stirred in the third step is aged;
in the fifth step, the aged materials are sent into a stirrer to be mixed and extruded, and then are sent into a granulator to be granulated and formed to prepare spherical or cylindrical granules with the particle size of 6 mm;
in the sixth step, the spherical or cylindrical particles are preheated by using a tubular resistance furnace, and the preheating process comprises the steps of heating at the speed of 10 ℃/min for about 40min, heating to 400 ℃ at room temperature, and keeping the constant temperature of 400 ℃ for 30min;
in the seventh step, the temperature of the tubular resistance furnace is increased according to the set program of the tubular resistance furnace at the speed of 10 ℃/min, the temperature is increased from 400 ℃ to 1175 ℃, and then the constant-temperature roasting treatment is carried out for 10 min;
and step eight, finishing the setting program of the tubular resistance furnace, stopping running, cooling to room temperature under the condition of natural cooling, and taking out the ceramsite.
Example 3:
an improved powdery clay sintered ceramsite comprises the following components in percentage by weight: the low-loss-on-ignition powdery clay comprises the following components in parts by weight: 100 parts of low-loss-on-ignition powdery clay, 4 parts of bran powder and 15.6 parts of water, wherein the low-loss-on-ignition powdery clay is prepared from strong weathering and sandy soil as raw materials.
A preparation method of improved powdery clay sintered ceramsite comprises the following steps: step one, drying raw materials; step two, batching; step three, stirring; step four, aging; step five, granulating; step six, preheating; step seven, roasting; step eight, cooling;
in the first step, preparing raw materials required for preparing sintered ceramsite, crushing the raw materials prepared except water, wherein the particle size of the crushed raw materials is 06mm, and then drying the crushed raw materials, wherein the water content of the dried raw materials is 5%;
in the second step, the raw materials dried in the first step and the required water are mixed according to a certain proportion;
in the third step, the mixed raw materials are stirred, so that various raw materials are uniformly mixed, the stirring time is 7min, and the stirring speed in the stirring process is 250r/min;
in the fourth step, the material stirred in the third step is aged;
in the fifth step, the aged material is sent into a stirrer to be mixed and extruded, and then is sent into a granulator to be granulated and molded to prepare spherical or cylindrical particles with the particle size of 6 mm;
in the sixth step, the spherical or cylindrical particles are preheated by using a tubular resistance furnace, and the preheating process is that the temperature is increased at the speed of 10 ℃/min for about 40min, the temperature is increased to 400 ℃ at room temperature, and then the temperature is kept at the constant temperature of 400 ℃ for 30min;
in the seventh step, the temperature of the tubular resistance furnace is increased according to the set program of the tubular resistance furnace at the speed of 10 ℃/min, the temperature is increased from 400 ℃ to 1175 ℃, and then the constant-temperature roasting treatment is carried out for 10 min;
and step eight, finishing the setting program of the tubular resistance furnace, stopping running, cooling to room temperature under the condition of natural cooling, and taking out the ceramsite.
Example 4:
an improved powdery clay sintered ceramsite comprises the following components in percentage by weight: the low-ignition loss powdery clay comprises the following components in parts by weight: 100 parts of low-ignition-loss powdery clay, 6 parts of bran coat powder and 15.9 parts of water, wherein the low-ignition-loss powdery clay is prepared from strongly weathered gravel-containing soil serving as a raw material.
A preparation method of improved powdery clay sintered ceramsite comprises the following steps: step one, drying raw materials; step two, batching; step three, stirring; step four, aging; step five, granulation; step six, preheating; step seven, roasting; step eight, cooling;
in the first step, preparing raw materials required for preparing sintered ceramsite, crushing the raw materials prepared except water, wherein the particle size of the crushed raw materials is 06mm, and then drying the crushed raw materials, wherein the water content of the dried raw materials is 5%;
in the second step, the raw materials dried in the first step and the required water are mixed according to a certain proportion;
in the third step, the mixed raw materials are stirred, so that various raw materials are uniformly mixed, the stirring time is 7min, and the stirring speed in the stirring process is 250r/min;
in the fourth step, the material stirred in the third step is aged;
in the fifth step, the aged material is sent into a stirrer to be mixed and extruded, and then is sent into a granulator to be granulated and molded to prepare spherical or cylindrical particles with the particle size of 6 mm;
in the sixth step, the spherical or cylindrical particles are preheated by using a tubular resistance furnace, and the preheating process is that the temperature is increased at the speed of 10 ℃/min for about 40min, the temperature is increased to 400 ℃ at room temperature, and then the temperature is kept at the constant temperature of 400 ℃ for 30min;
in the seventh step, the temperature of the tubular resistance furnace is increased according to the set program of the tubular resistance furnace at the speed of 10 ℃/min, the temperature is increased from 400 ℃ to 1175 ℃, and then the constant-temperature roasting treatment is carried out for 10 min;
and step eight, finishing the setting program of the tubular resistance furnace, stopping running, cooling to room temperature under the condition of natural cooling, and taking out the ceramsite.
The strongly weathered gravelly-bearing soil, strongly weathered sandy soil and muddy soil used in the above examples were subjected to soil sample composition analysis, respectively, and the results obtained were as follows:
the ceramsite obtained in the above example is respectively subjected to detection treatment, and the obtained results are as follows:
in conclusion, the low-ignition-loss powdery clay prepared from the mucky soil can be directly fired into ceramsite with good expansion performance, low density and high strength; the low-ignition loss powdery clay prepared by strong weathering and sandy soil can be fired into ceramsite with good expansion performance, low density and high strength by adding 2-4% of rice bran powder; the low-ignition loss powdery clay prepared from strongly weathered gravel-containing soil can be fired into ceramsite with good expansion property, low density and high strength by adding 4-6% of rice bran powder.
Based on the above, the invention has the advantages that the special formula is designed, so that the prepared ceramsite has the characteristics of high strength, good expansibility and low density, the problem of the existing ceramsite is solved, and the application of the powdery clay sintered ceramsite is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. An improved powdery clay sintered ceramsite comprises the following components in percentage by weight: low loss on ignition farinaceous clay, millet bran powder and water, its characterized in that: the weight parts of each component are respectively as follows: 90-100 parts of low-loss-on-ignition powdery clay, 0-6 parts of bran coat powder and 15-15.9 parts of water.
2. The improved powdery clay sintered ceramsite of claim 1, wherein: the proportion of the bran powder and the low-ignition-loss powdery clay is 0.00-0.06, the water accounts for 15% of the total consumption of the bran powder and the low-ignition-loss powdery clay, and the preparation raw materials of the low-ignition-loss powdery clay comprise but are not limited to strongly weathered gravel-containing soil, strongly weathered sandy soil and mucky soil.
3. The improved powdery clay sintered ceramsite of claim 1, wherein: the weight parts of the components are 100 parts of low-loss-on-ignition powdery clay and 15 parts of water respectively.
4. The improved powdery clay sintered ceramsite of claim 1, wherein: the weight parts of the components are 100 parts of low-loss-on-ignition farinaceous clay, 2 parts of bran coat powder and 15.3 parts of water.
5. The improved powdery clay sintered ceramsite as claimed in claim 1, wherein: the weight parts of the components are 100 parts of low-ignition-loss powdery clay, 4 parts of bran coat powder and 15.6 parts of water.
6. The improved powdery clay sintered ceramsite of claim 1, wherein: the weight parts of the components are 100 parts of low-loss-on-ignition farinaceous clay, 6 parts of bran coat powder and 15.9 parts of water.
7. A preparation method of improved powdery clay sintered ceramsite comprises the following steps: step one, drying raw materials; step two, batching; step three, stirring; step four, aging; step five, granulation; step six, preheating; step seven, roasting; step eight, cooling; the method is characterized in that:
in the first step, preparing raw materials required for preparing the sintered ceramsite, and then crushing the raw materials prepared except water;
in the second step, the raw materials dried in the first step and the required water are mixed according to a certain proportion;
in the third step, the mixed raw materials are stirred, so that various raw materials are uniformly mixed, the stirring time is 3-10min, and the stirring speed in the stirring process is 200-300r/min;
in the fourth step, the material stirred in the third step is aged;
in the fifth step, the aged materials are sent into a stirrer to be mixed and extruded, and then are sent into a granulator to be granulated and molded to prepare spherical or cylindrical particles with the particle size of 3-8 mm;
in the sixth step, the spherical or cylindrical particles are preheated by using a tubular resistance furnace, and the preheating process is that the temperature is increased at the speed of 10 ℃/min for about 40min, the temperature is increased to 400 ℃ at room temperature, and then the temperature is kept at the constant temperature of 400 ℃ for 30min;
in the seventh step, the tubular resistance furnace is set to be heated up according to the speed of 10 ℃/min, the temperature is raised from 400 ℃ to 1175 ℃, and then the constant-temperature roasting treatment is carried out for 10 min;
and step eight, finishing the setting program of the tubular resistance furnace, stopping running, cooling to room temperature under the condition of natural cooling, and taking out the ceramsite.
8. The method for preparing improved powdery clay sintered ceramsite according to claim 2, wherein the method comprises the following steps: in the first step, the particle size of the crushed raw material is 0-0.08mm, and then the crushed raw material is dried, and the water content of the dried raw material is 0-6%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2802835C1 (en) * | 2023-02-22 | 2023-09-04 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Курганский государственный университет" | Raw mix for production of porous aggregate |
| CN116947523A (en) * | 2023-08-02 | 2023-10-27 | 鸿生再生资源(福州)有限公司 | Energy-saving environment-friendly ceramsite processed by waste materials and preparation method thereof |
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Application publication date: 20221209 |