CN110835240B - A kind of fly ash ceramsite and preparation method thereof - Google Patents
A kind of fly ash ceramsite and preparation method thereof Download PDFInfo
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- 239000010881 fly ash Substances 0.000 title claims abstract description 81
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000008188 pellet Substances 0.000 claims abstract description 37
- 239000002667 nucleating agent Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000005469 granulation Methods 0.000 claims abstract description 17
- 230000003179 granulation Effects 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000002910 solid waste Substances 0.000 claims abstract description 7
- 239000013078 crystal Substances 0.000 claims abstract description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 4
- 230000006911 nucleation Effects 0.000 claims abstract description 3
- 238000010899 nucleation Methods 0.000 claims abstract description 3
- 239000011148 porous material Substances 0.000 claims abstract description 3
- 238000002844 melting Methods 0.000 claims abstract 3
- 239000000203 mixture Substances 0.000 claims description 20
- 229910052656 albite Inorganic materials 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 9
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003245 coal Substances 0.000 claims description 8
- 239000004021 humic acid Substances 0.000 claims description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 6
- 229910052661 anorthite Inorganic materials 0.000 claims description 6
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 239000010433 feldspar Substances 0.000 claims description 2
- 210000003298 dental enamel Anatomy 0.000 claims 1
- 239000008187 granular material Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 13
- 239000010883 coal ash Substances 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000000197 pyrolysis Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- JCCZVLHHCNQSNM-UHFFFAOYSA-N [Na][Si] Chemical compound [Na][Si] JCCZVLHHCNQSNM-UHFFFAOYSA-N 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000010413 gardening Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Classifications
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
本发明涉及一种粉煤灰陶粒及其制备方法，所述粉煤灰陶粒具有空腔结构，空腔以外的区域分布有均匀的气孔，空腔内壁由含有结晶水、结构水或羟基的低熔点固体废弃物高温分解得到。本发明首先利用成核剂的原料进行成核，得到球形成核剂，然后按配方量将粉煤灰和其他辅料混合，利用混合料对成核剂包覆，造粒后得到料球；将料球干燥后进行焙烧，冷却后得到所述粉煤灰陶粒。本发明制备得到了陶粒堆积密度为400‑600kg/m3，吸水率为0.5‑2.5％，筒压强度为3‑6MPa的粉煤灰陶粒，在保证陶粒强度的情况下，所得粉煤灰陶粒具有堆积密度小，质量轻，吸水率低等特点，满足市场对轻质高强粉煤灰陶粒的需求，具有良好的应用前景。
The invention relates to a fly ash ceramsite and a preparation method thereof. The fly ash ceramsite has a cavity structure, uniform pores are distributed in the area outside the cavity, and the inner wall of the cavity is composed of crystal water, structural water or hydroxyl groups. The low melting point solid waste is obtained by pyrolysis. The method firstly utilizes the raw material of the nucleating agent for nucleation to obtain a ball-forming nucleating agent, then mixes fly ash and other auxiliary materials according to the formula amount, coats the nucleating agent with the mixed material, and obtains pellets after granulation; The pellets are roasted after drying, and the fly ash ceramsite is obtained after cooling. The invention prepares the fly ash ceramsite with a bulk density of 400-600kg/m 3 , a water absorption rate of 0.5-2.5%, and a cylinder compressive strength of 3-6MPa. Under the condition of ensuring the strength of the ceramsite, the obtained powder Coal ash ceramsite has the characteristics of low bulk density, light weight and low water absorption, which meets the market demand for lightweight and high-strength fly ash ceramsite, and has a good application prospect.
Description
Technical Field
The invention relates to the field of solid waste resource utilization, in particular to fly ash ceramsite and a preparation method thereof.
Background
The ceramsite has excellent properties such as low density, high cylinder pressure strength, high porosity, high softening coefficient, good frost resistance, excellent alkali-resistant aggregate reaction performance and the like, and can be widely applied to the departments of building materials, gardening, food and beverage, fire-resistant heat-insulating materials, chemical industry, petroleum and the like. The fly ash ceramsite is an artificial lightweight aggregate prepared by mixing fly ash as a main raw material with a small amount of auxiliary raw materials (binder, fluxing agent, combustion improver and the like), pre-wetting and stirring, balling, preheating, baking and sintering. The composite material has the advantages of light weight, corrosion resistance, frost resistance, earthquake resistance, good insulativity and the like, can be widely applied to concrete members, refractory casting members and building heat-insulating materials, and can also be used in the fields of garden flowers, sewage treatment and the like. Although the technology for preparing the ceramsite gradually matures and the application field is continuously expanded, the problems in industrial production still exist, such as high water absorption of the ceramsite product, high bulk density, low green pellet strength and the like.
CN107417150A discloses a light-weight high-strength high-doping-amount fly ash ceramsite and a preparation method thereof, the method comprises the steps of uniformly mixing fly ash, a plasticizer, a foaming agent, a fluxing agent and an enhancing agent in proportion, granulating, drying and calcining to obtain the light-weight high-strength fly ash ceramsite, and the method has the defects that the prepared ceramsite has high bulk density and cannot meet the requirements of low-density ceramsite on the market. CN106396634A discloses a preparation method of light high-strength fly ash ceramsite, which is characterized in that the prepared ceramsite has high water absorption rate and does not meet the standard of GB17431.1-2010 light aggregate and a test method thereof, and the light high-strength fly ash ceramsite is obtained by controlling the reasonable collocation of a pore-forming agent, a fluxing agent, a binding agent and a reinforcing agent and performing ball milling, granulation and calcination. CN203613113U discloses a high-strength light-weight fly ash ceramsite, in which holes with the same size are uniformly distributed, the distance between every two adjacent holes is equal, the diameter of each hole is 0.5mm, but the method does not disclose the properties of the ceramsite, such as cylinder pressure strength, stacking density and the like, and has little reference value for practical application.
In the prior art, although the mass of the fly ash ceramsite is reduced by optimizing the materials, so that the fly ash ceramsite has the characteristic of light weight, the cylinder pressure strength is low, the water absorption is high, and the application of the ceramsite is limited. Therefore, there is a need to develop a fly ash ceramsite with light weight, high strength, low water absorption and excellent comprehensive properties.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide the fly ash ceramsite and the preparation method thereof, which solve the problems of large bulk density, high water absorption and the like of the conventional fly ash ceramsite and obtain the fly ash ceramsite with light weight, high strength, low water absorption and excellent comprehensive performance.
In a first aspect, the invention provides a fly ash ceramsite, which has a cavity structure, wherein uniform air holes are distributed in the region outside the cavity, and the inner wall of the cavity is obtained by high-temperature decomposition of low-melting-point solid waste containing crystal water, structural water or hydroxyl.
The fly ash ceramsite prepared by the method has a cavity structure inside, so that the ceramsite has the characteristic of light weight, and the stacking density of the ceramsite is reduced; the inner wall of the cavity is formed by decomposing low-melting-point solid waste containing crystal water, structural water or hydroxyl at high temperature, the hydrophobicity of the inner wall is strong, moisture can be effectively prevented from entering the cavity, and the water absorption of the ceramsite is reduced; in addition, through the selection of raw materials and processes, the fly ash ceramsite has higher strength. The fly ash ceramsite prepared by the method has the characteristics of light weight, high strength, low water absorption and excellent comprehensive performance.
In the fly ash ceramsite prepared by the method, the areas outside the cavity are distributed with uniform air holes, so that the quality and the stacking density of the ceramsite are further reduced, and the diameter of the air holes is less than 1 mm.
According to the invention, the fly ash ceramsite has a cavity.
According to the invention, the surface of the fly ash ceramsite is wrapped by the glaze layer.
According to the invention, the low-melting-point solid waste is at least one of coal slime containing humic acid, sodium-silicon slag or red mud.
According to the invention, the cavities in the fly ash ceramsite are spherical, the diameter of the spherical cavities is 1-5mm, for example, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, and the specific values therebetween are not exhaustive for reasons of space and simplicity.
According to the invention, the fly ash ceramsite comprises the following components in parts by mass:
according to the invention, the fly ash ceramsite contains 70-90 parts of fly ash, for example, 70 parts, 73 parts, 75 parts, 78 parts, 80 parts, 83 parts, 85 parts, 88 parts or 90 parts by mass, and specific values between the above values are limited by space and for the sake of brevity, and the invention is not exhaustive.
According to the invention, the fly ash ceramsite contains 5-10 parts of nucleating agent by mass, for example 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts, and the specific values between the above values are limited by space and for the sake of brevity, and the invention is not exhaustive.
According to the invention, the fly ash ceramsite contains 5-20 parts of auxiliary materials 1 by mass, for example, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts or 20 parts, and the specific values between the above values are limited by space and for the sake of brevity, and the invention is not exhaustive.
According to the invention, the fly ash ceramsite contains 0-10 parts of auxiliary material 2 by mass, for example, 0 part, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts, and the specific values between the above values are limited by space and for the sake of brevity and are not exhaustive.
According to the invention, the fly ash ceramsite contains 0.1-1.0 part of auxiliary material 3, for example, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part or 1.0 part by weight, and the specific values between the above values are limited to space and for the sake of brevity and are not exhaustive.
According to the invention, the nucleating agent is at least one of coal slime containing humic acid, sodium-silicon slag or red mud, for example, any one of the coal slime containing humic acid, sodium-silicon slag or red mud, and the typical but non-limiting combination is as follows: the coal slime and sodium-silicon slag containing humic acid, the sodium-silicon slag and the red mud, the coal slime and the red mud containing humic acid and the like are limited in space and in the interest of conciseness, and the invention is not exhaustive.
According to the invention, the auxiliary material 1 is feldspar, preferably any one or at least one of albite, potassium feldspar or anorthite, for example, any one of albite, potassium feldspar or anorthite, and the typical but non-limiting combination is as follows: albite and potassium feldspar, albite and anorthite, potassium feldspar and anorthite, albite, potassium feldspar and anorthite.
According to the invention, the adjuvant 2 is clay.
According to the invention, the auxiliary material 3 is silicon carbide.
In a second aspect, the present invention provides a method for preparing the fly ash ceramsite according to the first aspect, comprising the following steps:
(1) carrying out nucleation by using a raw material of a nucleating agent to obtain a spherical nucleating agent;
(2) mixing the fly ash and the auxiliary materials according to the formula amount, coating the nucleating agent obtained in the step (1) by using the mixture, and then granulating to obtain material balls;
(3) and (3) drying the pellets obtained in the step (2), roasting, and cooling to obtain the fly ash ceramsite.
According to the present invention, the diameter of the spherical nucleating agent in the step (1) is 1-5mm, for example, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, and the specific values therebetween are not exhaustive for the sake of brevity.
According to the present invention, the temperature of the drying in step (3) is 60-120 ℃, for example, 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃, 110 ℃ or 120 ℃, and the specific values therebetween are limited for brevity and conciseness, and the present invention is not exhaustive.
According to the present invention, the temperature of the calcination in step (3) is 1100-.
According to the invention, the roasting time in step (3) is 10-30min, for example 10min, 13min, 15min, 18min, 20min, 23min, 25min, 28min or 30min, and the specific values between the above values are limited by space and for the sake of brevity, and the invention is not exhaustive.
According to the invention, after the roasting in the step (3) is finished, the mixture is cooled to below 500 ℃ along with the furnace, and is naturally cooled to room temperature after being taken out.
As a preferred technical scheme, the preparation method of the fly ash ceramsite comprises the following steps:
(1) adding the raw materials of the nucleating agent into a granulator for granulation to obtain a spherical nucleating agent with the diameter of 1-5 mm;
(2) mixing the fly ash and the auxiliary materials according to the formula amount, coating the nucleating agent obtained in the step (1) by using the mixture, and then adding the mixture into a granulator for granulation to obtain material balls;
(3) and (3) drying the pellets obtained in the step (2) at 60-120 ℃, then placing the pellets in a sintering furnace, heating to 1100-1250 ℃, roasting for 10-30min, cooling to below 500 ℃ along with the furnace after roasting is finished, taking out and naturally cooling to room temperature to obtain the fly ash ceramsite.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the prepared ceramsite has the bulk density of 400-600kg/m3The water absorption rate is 0.5-2.5%, the cylinder pressure strength is 3-6MPa, and the obtained fly ash ceramsite has the characteristics of small stacking density, light weight, low water absorption rate and the like under the condition of ensuring the strength of the ceramsite, meets the market requirements on the light high-strength fly ash ceramsite, and has good application prospects.
(2) In the process of preparing the ceramsite, the ceramsite is nucleated and then granulated, and a uniform circular cavity is formed in the obtained fly ash ceramsite, so that the uniformity of the fly ash ceramsite is improved, the production rate is increased, and the method is suitable for industrial application.
Drawings
Fig. 1 is a schematic structural diagram of a fly ash ceramsite obtained in example 1 of the present invention.
The present invention is described in further detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
(1) Adding coal slime containing humic acid into a granulator for granulation to obtain a spherical nucleating agent with the diameter of 3 mm;
(2) mixing 75 parts of fly ash, 14.7 parts of albite, 5 parts of clay and 0.3 part of silicon carbide, coating one nucleating agent (7 parts by mass) obtained in the step (1) by using the mixture, and then adding the mixture into a granulator for granulation to obtain material balls with the diameter of less than 20 mm;
(3) and (3) drying the pellets obtained in the step (2) at 80 ℃, then placing the pellets in a sintering furnace to be heated to 1180 ℃ for roasting for 10min, cooling the pellets to be below 500 ℃ along with the furnace after roasting is finished, taking out the pellets and naturally cooling the pellets to room temperature to obtain the fly ash ceramsite.
As shown in FIG. 1, the fly ash ceramsite prepared by the present embodiment has a cavity, and the areas outside the cavity are distributed with uniform pores,
example 2
(1) Adding coal slime containing humic acid into a granulator for granulation to obtain a spherical nucleating agent with the diameter of 4.2 mm;
(2) mixing 82 parts of fly ash, 8 parts of albite, 4.5 parts of clay and 0.5 part of silicon carbide, coating one nucleating agent (9 parts by mass) obtained in the step (1) by using the mixture, and then adding the mixture into a granulator for granulation to obtain material balls with the diameter of less than 20 mm;
(3) and (3) drying the pellets obtained in the step (2) at 100 ℃, then placing the pellets in a sintering furnace to be heated to 1210 ℃ for roasting for 20min, cooling the pellets to be below 500 ℃ along with the furnace after roasting is finished, taking out the pellets and naturally cooling the pellets to room temperature to obtain the fly ash ceramsite.
Example 3
(1) Adding the sodium-silicon slag into a granulator for granulation to obtain a spherical nucleating agent with the diameter of 1.3 mm;
(2) mixing 85 parts of fly ash, 9.2 parts of albite and 0.8 part of silicon carbide, coating one nucleating agent (5 parts by mass) obtained in the step (1) by using the mixture, and then adding the mixture into a granulator for granulation to obtain material balls with the diameter of less than 20 mm;
(3) and (3) drying the pellets obtained in the step (2) at 120 ℃, then placing the pellets in a sintering furnace to be heated to 1230 ℃, roasting for 20min, cooling the pellets to below 500 ℃ along with the furnace after roasting is finished, taking out the pellets, and naturally cooling the pellets to room temperature to obtain the fly ash ceramsite.
Example 4
(1) Adding the sodium-silicon slag into a granulator for granulation to obtain a spherical nucleating agent with the diameter of 2 mm;
(2) mixing 80 parts of fly ash, 9.2 parts of albite and 0.8 part of silicon carbide, coating one nucleating agent (6 parts by mass) obtained in the step (1) by using the mixture, and then adding the mixture into a granulator for granulation to obtain material balls with the diameter of less than 20 mm;
(3) and (3) drying the pellets obtained in the step (2) at 120 ℃, then placing the pellets in a sintering furnace, heating to 1220 ℃, roasting for 15min, cooling to below 500 ℃ along with the furnace after roasting is finished, taking out the pellets, and naturally cooling to room temperature to obtain the fly ash ceramsite.
Example 5
(1) Adding the red mud into a granulator for granulation to obtain a spherical nucleating agent with the diameter of 5 mm;
(2) mixing 90 parts of fly ash, 4.7 parts of albite and 0.3 part of silicon carbide, coating 10 parts of nucleating agent (in parts by mass) obtained in the step (1) by using the mixture, and then adding the mixture into a granulator for granulation to obtain material balls with the diameter of less than 20 mm;
(3) and (3) drying the pellets obtained in the step (2) at 120 ℃, then placing the pellets in a sintering furnace to be heated to 1250 ℃, roasting for 30min, cooling the pellets to be below 500 ℃ along with the furnace after roasting is finished, taking out the pellets and naturally cooling the pellets to room temperature to obtain the fly ash ceramsite.
Example 6
(1) Adding the red mud into a granulator for granulation to obtain a spherical nucleating agent with the diameter of 3.5 mm;
(2) mixing 70 parts of fly ash, 10 parts of albite, 9.8 parts of clay and 0.2 part of silicon carbide, coating one nucleating agent (7 parts by mass) obtained in the step (1) by using the mixture, and then adding the mixture into a granulator for granulation to obtain material balls with the diameter of less than 20 mm;
(3) and (3) drying the pellets obtained in the step (2) at 100 ℃, then placing the pellets in a sintering furnace, heating to 1200 ℃, roasting for 30min, cooling to below 500 ℃ along with the furnace after roasting is finished, taking out the pellets, and naturally cooling to room temperature to obtain the fly ash ceramsite.
The fly ash ceramsite prepared in examples 1-6 was tested for properties according to the conventional testing method in the art, and the test results are shown in table 1.
TABLE 1
| Bulk density kg/m3 | Barrel pressure strength MPa | Water absorption% | |
| Example 1 | 472 | 4.10 | 0.82 |
| Example 2 | 502 | 5.08 | 1.95 |
| Example 3 | 460 | 4.65 | 2.05 |
| Example 4 | 443 | 3.85 | 1.27 |
| Example 5 | 438 | 3.24 | 2.48 |
| Example 6 | 457 | 4.16 | 0.76 |
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (15)
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| TWI742547B (en) * | 2020-03-02 | 2021-10-11 | 明春窯業股份有限公司 | Method for manufacturing of high strength structural lightweight aggregates by an energy-saving and nitrogen-reducing rotary kiln |
| CN112552021B (en) * | 2020-12-09 | 2023-03-24 | 河南强耐新材股份有限公司 | Fly ash ceramsite and preparation method thereof |
| CN112707663B (en) * | 2021-01-30 | 2022-07-05 | 北京工业大学 | A kind of preparation method of red mud core-shell structure fine aggregate |
| CN113481013A (en) * | 2021-07-14 | 2021-10-08 | 昆明理工大学 | Method for preparing soil conditioner by utilizing ceramsite in-situ hydrothermal combination with biochar |
| CN115925390B (en) * | 2023-01-10 | 2023-07-07 | 郑州大学 | A kind of multi-layer high-strength thermal insulation ceramsite and its preparation method |
| CN116621599B (en) * | 2023-04-17 | 2025-04-29 | 中冶北方（大连）工程技术有限公司 | Preparation method of light ceramsite |
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| CN203613113U (en) * | 2013-12-18 | 2014-05-28 | 安徽国安三利新型建材有限公司 | Strong-strength lightweight fly ash ceramisite |
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