CN107686334B - Phosphogypsum fly ash ceramsite and preparation method thereof - Google Patents
Phosphogypsum fly ash ceramsite and preparation method thereof Download PDFInfo
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- CN107686334B CN107686334B CN201710876538.2A CN201710876538A CN107686334B CN 107686334 B CN107686334 B CN 107686334B CN 201710876538 A CN201710876538 A CN 201710876538A CN 107686334 B CN107686334 B CN 107686334B
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- 239000010881 fly ash Substances 0.000 title claims abstract 7
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract 6
- 238000002360 preparation method Methods 0.000 title claims abstract 3
- 239000004927 clay Substances 0.000 claims 6
- 238000000227 grinding Methods 0.000 claims 5
- DZHMRSPXDUUJER-UHFFFAOYSA-N [amino(hydroxy)methylidene]azanium;dihydrogen phosphate Chemical compound NC(N)=O.OP(O)(O)=O DZHMRSPXDUUJER-UHFFFAOYSA-N 0.000 claims 2
- 239000008187 granular material Substances 0.000 claims 2
- 239000011812 mixed powder Substances 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 2
- 239000000843 powder Substances 0.000 claims 2
- 238000007873 sieving Methods 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 238000001354 calcination Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 229910052593 corundum Inorganic materials 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 238000005469 granulation Methods 0.000 claims 1
- 230000003179 granulation Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- 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
-
- 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
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
-
- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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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
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- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to the technical field of phosphogypsum ceramsite, in particular to a phosphogypsum fly ash ceramsite and a preparation method thereof.
Description
Technical Field
The invention relates to the technical field of phosphogypsum ceramsite, in particular to phosphogypsum fly ash ceramsite and a preparation method thereof.
Background
Phosphogypsum is a main solid waste in the phosphate fertilizer industry of China, and the main components of the phosphogypsum are dihydrate gypsum and hemihydrate gypsum. According to incomplete statistics, the annual total discharge amount of phosphogypsum in China exceeds 5500 ten thousand tons of dry basis, and the accumulated stockpiling amount is 2.5 hundred million tons. With the development of high-concentration phosphate fertilizers in China, the discharge amount of phosphogypsum is increased, so that the method not only causes serious environmental pollution, but also becomes a major problem for sustainable development of the phosphorus chemical industry. Therefore, the effective treatment of the phosphogypsum is not slow enough.
Fly ash is fine ash collected from flue gas generated after coal combustion, and is main solid waste discharged from coal-fired power plants. The oxide composition of the fly ash is as follows: SiO 22、Al2O3And small amounts of FeO and Fe2O3、CaO、MgO、SO3、TiO2And the like. Wherein SiO is2And Al2O3The content can be more than 60% of the total content. The fly ash is one of the current industrial waste residues with large discharge capacity in China, and the discharge amount of the fly ash in coal-fired power plants is increased year by year along with the development of the power industry. A large amount of fly ash can generate dust without treatment, thereby polluting the atmosphere; if discharged into a water system, the river can be silted, and toxic chemicals in the river can cause harm to human bodies and organisms.
The ceramsite is ceramic particles, the surface of the ceramsite is a layer of hard shell, and the shell is ceramic or enamel, has the functions of water isolation and gas retention, and endows the ceramsite with higher strength. The particle size of the ceramsite is generally 5-20 mm, and the maximum particle size is 25 mm. Ceramsite is generally used to replace crushed stone and pebbles in concrete.
In the prior art, the research technologies of preparing ceramsite by taking phosphogypsum, fly ash and the like as raw materials are relatively more, but most of the ardealite and fly ash are added into main raw materials in an additive mode to prepare the ceramsite, so that the utilization rate of the phosphogypsum and the fly ash is low; even if a large amount of phosphogypsum is used for preparing the ceramsite and other products are obtained, the technical scheme is not that the phosphogypsum is directly used as a raw material for preparing the ceramsite, so that the cost for preparing the ceramsite by the phosphogypsum is higher and the energy consumption is higher.
Based on this, the researchers carry out reasonable proportioning design on the phosphogypsum and the fly ash, combine with addition and treatment of other raw material components, and limit the process steps and parameters of the ceramsite preparation process, thereby providing a new idea for the technical field of preparing ceramsite by using the phosphogypsum.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides phosphogypsum fly ash ceramsite and a preparation method thereof.
The method is realized by the following technical scheme:
the phosphogypsum-fly ash ceramsite comprises the following raw materials, by weight, 50-80 parts of phosphogypsum, 5-10 parts of clay and 8-12 parts of fly ash, wherein the clay is powder formed by mixing and grinding urea phosphate.
The raw material components comprise 60 parts of phosphogypsum, 8 parts of clay and 10 parts of fly ash in parts by weight.
The mass ratio of the clay to the urea phosphate is 1: 0.1-0.4.
The grinding is carried out by adding water 11-15% of clay mass, grinding, treating at 60-80 deg.C for 10-20min, sieving, and oven drying to constant weight.
The sieve is an 80-mesh sieve.
The fly ash comprises SiO in percentage by mass240-50％、Al2O310-20％、FeO0.2-3％、Fe2O38-15％、CaO2-7％、MgO6-9％、TiO23-8% and the total amount is 100%.
The fly ash comprises SiO in percentage by mass246％、Al2O317％、FeO3％、Fe2O313％、CaO7％、MgO7％、TiO27％。
The preparation method of the ardealite fly ash ceramsite comprises the following steps:
(1) drying phosphogypsum to constant weight, adding fly ash, grinding to 40-200 meshes, adding clay powder, stirring uniformly, and adjusting the water content to 20-30% to obtain mixed powder;
(2) and (2) placing the mixed powder into a granulator for granulation, making the diameter of the granules to be 2-10mm, placing the granules at the temperature of 40-200 ℃, carrying out preheating treatment for 30min, then heating to 1200 ℃ for 10min, carrying out calcination treatment for 180min, and naturally cooling to obtain the ceramsite.
Compared with the prior art, the invention has the technical effects that:
the clay is subjected to mixing modification treatment by adopting urea phosphate, is reasonably matched with the phosphogypsum and the fly ash, and is prepared into the ceramsite, so that the density of the prepared ceramsite is greatly improved, and the strength of the ceramsite is greatly improved.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
Example 1
The phosphogypsum-fly ash ceramsite comprises 50kg of phosphogypsum, 5kg of clay and 8kg of fly ash by weight, wherein the clay is powder formed by mixing and grinding the clay and urea phosphate in a mass ratio of 1: 0.1.
The preparation method of the ardealite fly ash ceramsite comprises the following steps:
(1) drying the phosphogypsum to constant weight, adding fly ash, grinding to 40 meshes, adding clay powder, stirring uniformly, and adjusting the water content to 20% to obtain mixed powder;
(2) and (3) placing the mixed powder into a granulator for granulation to enable the diameter of the granules to be 2mm, placing the granules at 40 ℃, carrying out preheating treatment for 30min, then heating to 1200 ℃ for 10min, carrying out calcination treatment for 180min, and naturally cooling to obtain the ceramsite.
Example 2
The phosphogypsum-fly ash ceramsite comprises 80kg of phosphogypsum, 10kg of clay and 12kg of fly ash by weight, wherein the clay is powder formed by mixing and grinding urea phosphate according to the mass ratio of 1: 0.4. The fly ash comprises SiO in percentage by mass240％、Al2O320％、FeO2％、Fe2O315％、CaO7％、MgO8％、TiO28％。
The preparation method of the ardealite fly ash ceramsite comprises the following steps:
(1) drying the phosphogypsum to constant weight, adding fly ash, grinding to 100 meshes, adding clay powder, stirring uniformly, and adjusting the water content to 25% to obtain mixed powder;
(2) and (3) placing the mixed powder into a granulator for granulation to enable the diameter of the granules to be 8mm, placing the granules at 100 ℃, carrying out preheating treatment for 30min, then heating to 1200 ℃ for 10min, carrying out calcination treatment for 180min, and naturally cooling to obtain the ceramsite.
Example 3
The phosphogypsum-fly ash ceramsite comprises 60kg of phosphogypsum, 8kg of clay and 10kg of fly ash by weight, wherein the clay is powder formed by mixing and grinding urea phosphate according to the mass ratio of 1: 0.3. Adding water accounting for 14% of clay mass in the grinding process, treating at 70 deg.C for 15min after grinding, sieving with 80 mesh sieve, and oven drying to constant weight. The fly ash comprises SiO in percentage by mass250％、Al2O315％、FeO1％、Fe2O312％、CaO6％、MgO8％、TiO28％。
The preparation method of the ardealite fly ash ceramsite comprises the following steps:
(1) drying the phosphogypsum to constant weight, adding fly ash, grinding to 200 meshes, adding clay powder, stirring uniformly, and adjusting the water content to be 30% to obtain mixed powder;
(2) and (3) placing the mixed powder into a granulator for granulation, making the diameter of the granules to be 10mm, placing the granules at 200 ℃, carrying out preheating treatment for 30min, then heating to 1200 ℃ for 10min, carrying out calcination treatment for 180min, and naturally cooling to obtain the ceramsite.
Example 4
The phosphogypsum-fly ash ceramsite comprises 50kg of phosphogypsum, kg of clay and 9kg of fly ash by weight, wherein the clay is powder formed by mixing and grinding the clay and urea phosphate in a mass ratio of 1: 0.3. Adding water accounting for 12% of the clay mass in the grinding process, treating at 80 ℃ for 20min after grinding, sieving with a 80-mesh sieve, and drying to constant weight. The fly ash comprises SiO in percentage by mass249％、Al2O310％、FeO3％、Fe2O315％、CaO6％、MgO9％、TiO28％。
The preparation method of the ardealite fly ash ceramsite comprises the following steps:
(1) drying the phosphogypsum to constant weight, adding fly ash, grinding to 40 meshes, adding clay powder, stirring uniformly, and adjusting the water content to 20% to obtain mixed powder;
(2) and (3) placing the mixed powder into a granulator for granulation, making the diameter of the granules to be 10mm, placing the granules at 40 ℃, carrying out preheating treatment for 30min, then heating to 1200 ℃ for 10min, carrying out calcination treatment for 180min, and naturally cooling to obtain the ceramsite.
Example 5
The phosphogypsum-fly ash ceramsite comprises 80kg of phosphogypsum, 5kg of clay and 8kg of fly ash by weight, wherein the clay is powder formed by mixing and grinding urea phosphate according to the mass ratio of 1: 0.1. Adding water accounting for 15% of the clay mass in the grinding process, treating at 60 ℃ for 10min after grinding, sieving with a 80-mesh sieve, and drying to constant weight. The fly ash comprises SiO in percentage by mass246％、Al2O317％、FeO3％、Fe2O313％、CaO7％、MgO7％、TiO27％。
The preparation method of the ardealite fly ash ceramsite comprises the following steps:
(1) drying the phosphogypsum to constant weight, adding fly ash, grinding to 40 meshes, adding clay powder, stirring uniformly, and adjusting the water content to be 30% to obtain mixed powder;
(2) and (3) placing the mixed powder into a granulator for granulation to ensure that the diameter of the granules is 9mm, placing the granules at the temperature of 100 ℃, carrying out preheating treatment for 30min, then heating to 1200 ℃ for 10min, carrying out calcination treatment for 180min, and naturally cooling to obtain the ceramsite.
The densities and the rolling compressive strengths of the ceramisites prepared in examples 1 to 5 were measured, and the results are shown in Table 1:
TABLE 1
The data in the table 1 show that, the invention adopts a large amount of phosphogypsum as the raw material, adds the clay and the fly ash, and mixes and grinds the clay and the urea phosphate into powder, so that the density and the strength of the prepared ceramsite are effectively improved, the quality of the ceramsite is improved, the application range of the phosphogypsum is expanded, and the utilization rate of the phosphogypsum is improved.
Claims (2)
1. The phosphogypsum-fly ash ceramsite is characterized by comprising 60 parts of phosphogypsum, 8 parts of clay and 10 parts of fly ash by weight, wherein the clay is powder formed by mixing and grinding the clay and urea phosphate;
the mass ratio of the clay to the urea phosphate is 1: 0.1-0.4;
the grinding is carried out, water accounting for 11-15% of the mass of the clay is added in the grinding process, after the grinding is finished, the mixture is placed at the temperature of 60-80 ℃ for treatment for 10-20min, and then the mixture is sieved and dried to constant weight;
the sieving is a 80-mesh sieving;
the fly ash comprises SiO in percentage by mass246％、Al2O317％、FeO3％、Fe2O313％、CaO7％、MgO7％、TiO27％。
2. The preparation method of the phosphogypsum fly ash ceramsite according to claim 1, which is characterized by comprising the following steps:
(1) drying phosphogypsum to constant weight, adding fly ash, grinding to 40-200 meshes, adding clay powder, stirring uniformly, and adjusting the water content to 20-30% to obtain mixed powder;
(2) and (2) placing the mixed powder into a granulator for granulation, making the diameter of the granules to be 2-10mm, placing the granules at the temperature of 40-200 ℃, carrying out preheating treatment for 30min, then heating to 1200 ℃ for 10min, carrying out calcination treatment for 180min, and naturally cooling to obtain the ceramsite.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710876538.2A CN107686334B (en) | 2017-09-25 | 2017-09-25 | Phosphogypsum fly ash ceramsite and preparation method thereof |
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| CN201710876538.2A CN107686334B (en) | 2017-09-25 | 2017-09-25 | Phosphogypsum fly ash ceramsite and preparation method thereof |
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| CN107686334B true CN107686334B (en) | 2020-06-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114890701B (en) * | 2022-05-09 | 2023-03-24 | 成都理工大学 | A kind of environment-friendly and energy-saving ceramsite for plateau building concrete and its preparation method and application |
| CN115215678B (en) * | 2022-05-19 | 2023-07-25 | 湖北省长江资源循环利用及装备创新中心有限公司 | Organic residue clay light ceramsite of phosphogypsum product and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104231890A (en) * | 2014-08-27 | 2014-12-24 | 南京市荣达树脂有限公司 | flame retardant coating for cars and preparation method thereof |
| CN106083156A (en) * | 2016-06-28 | 2016-11-09 | 平凉华晨非金属应用科技有限公司 | Desulfurated plaster lightweight through hole haydite |
| CN106116496A (en) * | 2016-06-28 | 2016-11-16 | 平凉华晨非金属应用科技有限公司 | Phosphogypsum light through hole haydite |
| CN107674455A (en) * | 2017-08-30 | 2018-02-09 | 贵州紫云月华新材料有限公司 | A kind of calcium carbonate modifier and its method of modifying |
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- 2017-09-25 CN CN201710876538.2A patent/CN107686334B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104231890A (en) * | 2014-08-27 | 2014-12-24 | 南京市荣达树脂有限公司 | flame retardant coating for cars and preparation method thereof |
| CN106083156A (en) * | 2016-06-28 | 2016-11-09 | 平凉华晨非金属应用科技有限公司 | Desulfurated plaster lightweight through hole haydite |
| CN106116496A (en) * | 2016-06-28 | 2016-11-16 | 平凉华晨非金属应用科技有限公司 | Phosphogypsum light through hole haydite |
| CN107674455A (en) * | 2017-08-30 | 2018-02-09 | 贵州紫云月华新材料有限公司 | A kind of calcium carbonate modifier and its method of modifying |
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