CN115215678A - Organic slag clay light ceramsite produced by flotation of phosphogypsum and preparation method thereof - Google Patents
Organic slag clay light ceramsite produced by flotation of phosphogypsum and preparation method thereof Download PDFInfo
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- CN115215678A CN115215678A CN202210543430.2A CN202210543430A CN115215678A CN 115215678 A CN115215678 A CN 115215678A CN 202210543430 A CN202210543430 A CN 202210543430A CN 115215678 A CN115215678 A CN 115215678A
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- flotation
- phosphogypsum
- clay
- oxide
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- 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 description 77
- 239000004927 clay Substances 0.000 title claims abstract description 51
- 238000005188 flotation Methods 0.000 title claims abstract description 50
- 239000002893 slag Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 30
- 239000003245 coal Substances 0.000 claims abstract description 17
- 239000010881 fly ash Substances 0.000 claims abstract description 16
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000008187 granular material Substances 0.000 claims description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 10
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- XLLIQLLCWZCATF-UHFFFAOYSA-N ethylene glycol monomethyl ether acetate Natural products COCCOC(C)=O XLLIQLLCWZCATF-UHFFFAOYSA-N 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- WEBRDDDJKLAXTO-UHFFFAOYSA-N 2-ethyl-1,3-dioxolane Chemical compound CCC1OCCO1 WEBRDDDJKLAXTO-UHFFFAOYSA-N 0.000 claims description 4
- CQRFEDVNTJTKFU-UHFFFAOYSA-N 3-methoxypentane Chemical compound CCC(CC)OC CQRFEDVNTJTKFU-UHFFFAOYSA-N 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims 3
- 239000000292 calcium oxide Substances 0.000 claims 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 3
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims 3
- 229910001950 potassium oxide Inorganic materials 0.000 claims 3
- 239000000047 product Substances 0.000 description 41
- 238000010304 firing Methods 0.000 description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003911 water pollution Methods 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
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- 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
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- 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
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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Abstract
The invention relates to the technical field of phosphogypsum ceramsite, in particular to light organic slag clay ceramsite of a flotation phosphogypsum product and a preparation method thereof, wherein the organic slag and clay of the flotation phosphogypsum product are ground, reasonably proportioned and designed with coal gangue, fly ash and calcium carbonate, and the raw materials are mixed, granulated and fired to prepare the ceramsite, so that the density of the ceramsite is 350-450 kg/m 3 The strength is 4-7MPa, the quality of the ceramsite is effectively improved, organic slag of a flotation phosphogypsum product is utilized, and secondary pollution is avoided.
Description
Technical Field
The invention relates to the technical field of phosphogypsum ceramsite, in particular to organic slag clay light ceramsite obtained by flotation of a phosphogypsum product and a preparation method thereof.
Background
Phosphogypsum is a solid waste material which is a byproduct of wet processing of phosphorite resources, and about 5-8 tons of phosphogypsum are produced when 1 ton of phosphoric acid is produced. China is a country with large reserves and demands of phosphorus resources, the accumulated stockpiling amount of the phosphogypsum is 2.5 hundred million tons, 8000 million tons of newly added phosphogypsum per year, and the utilization rate is about 33 percent. The phosphogypsum stockpiling occupies a large amount of land, and water pollution caused by rain washing of phosphorus, fluorine, silicon slag, organic slag and heavy metal in the phosphogypsum becomes a technical bottleneck restricting the development of phosphorus resource processing enterprises, so that the phosphogypsum is effectively treated.
In the prior art, most of the treatment of the phosphogypsum is to directly add the phosphogypsum into other raw material components and fire the phosphogypsum into ceramsite, so that the utilization rate of the phosphogypsum is low, the quality of the prepared ceramsite is poor, and the density of the ceramsite product is extremely high and reaches 500kg/m 3 The strength of the obtained ceramsite is lower, about 0.5MPa, so that the application range of the prepared ceramsite product is limited. For example, the method for synthesizing the ceramsite by using the coal slime, the phosphogypsum and the metallurgical waste residue has the patent number of 201010249969.4, and the ceramsite is prepared by mixing the three raw materials, granulating, firing and naturally cooling, so that the water absorption rate of the ceramsite is lower than 15%, and the bulk density of the ceramsite is less than or equal to 500kg/m 3 The cylinder pressure strength is more than 0.3MPa.
In addition, the phosphogypsum also contains harmful impurities, and the flotation of the phosphogypsum is to remove the harmful impurities in the phosphogypsum: removing phosphorus, fluorine, silicon slag, organic slag and heavy metal to obtain first-grade gypsum, and can be widely applied to the fields of mortar, self-leveling, building blocks, partition boards and the like. However, the organic slag of the phosphogypsum flotation product is not developed and utilized in a mature technology at present, most of the organic slag is used as waste to be buried, and secondary pollution is easily caused.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a light ceramsite containing organic residue clay and a preparation method thereof, wherein the ceramsite is prepared by reasonably proportioning organic residue of a flotation phosphogypsum product, coal gangue, fly ash and calcium carbonate, and the preparation method is realized by the following technical scheme:
the light ceramsite containing the organic residue clay as the product of the flotation of the phosphogypsum is prepared from the following raw materials in parts by weight: 10-20 parts of organic residue of the flotation phosphogypsum product, 55-75 parts of clay, 10-15 parts of coal gangue, 5-10 parts of fly ash and 5-10 parts of calcium carbonate.
Further, the organic slag of the flotation phosphogypsum product comprises the following components in percentage by content: 50-70% of calcium sulfate dihydrate, 20-40% of organic matters (2-ethyl-1,3 dioxolane, isothiocyanic methane, 3-methoxy-n-pentane and ethylene glycol monomethyl ether acetate), 1-2% of silicon dioxide, 1-2% of ferric oxide and 1-2% of magnesium oxide.
Further, the organic slag of the flotation phosphogypsum product comprises the following components in percentage by content: 60% of calcium sulfate dihydrate, 35% of organic matters (2-ethyl-1,3 dioxolane, isothiocyanic methane, 3-methoxy-n-pentane and ethylene glycol monomethyl ether acetate), 1% of silicon dioxide, 2% of ferric oxide and 2% of magnesium oxide.
Further, the method for preparing the flotation phosphogypsum product organic residue clay light ceramsite comprises the following steps:
a. drying, grinding and sieving the organic residue and clay of the flotation phosphogypsum product, adding coal gangue, fly ash, calcium carbonate powder and water, and uniformly stirring to obtain a mixture;
b. and c, placing the mixture obtained in the step a into a granulator for granulation, placing the granules into a muffle furnace or a roasting furnace for firing and cooling to obtain the flotation phosphogypsum product organic slag clay light ceramsite.
And further, carrying out flotation on the organic residue of the phosphogypsum product and clay in the step a, drying, grinding and sieving by using a 80-mesh sieve, wherein the mass ratio of water to materials to other materials is 0.1-0.9.
Further, the diameter of the particles in the step b is 5-25mm, the sintering process is to preheat the particles to 60-150 ℃ for 30min, heat the particles to 550-600 ℃ for 20min, keep the temperature for 20min, heat the particles to 1800-1200 ℃ for 10min, keep the temperature for 20min, and finally cool the particles to 300 ℃ for 1 h.
Compared with the prior art, the invention has the technical effects that:
grinding the phosphogypsum product organic slag and clay, reasonably proportioning the organic slag and clay with coal gangue, fly ash and calcium carbonate, mixing the raw materials, granulating and firing to prepare the ceramsite, wherein the density of the ceramsite is 350-450 kg/m < 3 >, the strength of the ceramsite is 4-7Mpa, and the quality of the ceramsite is effectively improved; the organic slag of the phosphogypsum flotation product is rich in organic matters, a heat source is provided in the calcining process, organic matter particles are small, and micropores in the calcined ceramsite are uniformly distributed, so that the quality of the ceramsite is improved; by utilizing the organic slag of the phosphogypsum flotation product, secondary pollution is avoided, and the utilization rate of the phosphogypsum is effectively improved.
Detailed Description
The present invention is further described in detail below with reference to examples, so that those skilled in the art can implement the present invention with reference to the description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the present invention.
Example 1
The flotation phosphogypsum product organic residue clay light ceramsite comprises the following raw materials, by weight, 15Kg of flotation phosphogypsum product organic residue, 65Kg of clay, 10Kg of coal gangue, 5Kg of fly ash and 5Kg of calcium carbonate. Wherein the phosphogypsum product, namely organic slag and clay, are ground.
The preparation method of the organic residue clay light ceramsite of the phosphogypsum flotation product comprises the following steps:
(1) Drying and grinding the organic residue and clay of the flotation phosphogypsum product, sieving by a sieve of 80 meshes, adding coal gangue, fly ash and calcium carbonate powder, uniformly stirring, adding water according to the water-material mass ratio of 1.
(2) And (2) placing the mixture obtained in the step (1) in a granulator for granulation, enabling the diameter of the granules to be 15mm, placing the granules in a muffle furnace or a roasting furnace for firing and cooling to obtain the flotation phosphogypsum product organic slag clay light ceramsite.
Preferably, the firing is to preheat the particles to 80 ℃, preheat for 30min, heat the particles to 550 ℃ in 20min, keep the temperature for 20min, heat the particles to 1200 ℃ in 10min, keep the temperature for 20min, cool the particles to 300 ℃ in 1h, and cool the particles to the normal temperature.
The obtained ceramsite has the bulk density of 426kg/m < 3 > and the cylinder pressure strength of 6.2MPa.
Example 2
The flotation phosphogypsum product organic residue clay light ceramsite comprises the raw materials of, by weight, 15Kg of flotation phosphogypsum product organic residue, 60Kg of clay, 15Kg of coal gangue, 5Kg of fly ash and 5Kg of calcium carbonate. Wherein the phosphogypsum product, namely organic slag and clay, are ground.
The preparation method of the organic residue clay light ceramsite of the phosphogypsum flotation product comprises the following steps:
(1) Drying and grinding the organic residue and clay of the flotation phosphogypsum product, sieving by a sieve of 80 meshes, adding coal gangue, fly ash and calcium carbonate powder, uniformly stirring, adding water according to the water-material mass ratio of 1.
(2) And (2) placing the mixture obtained in the step (1) in a granulator for granulation, enabling the diameter of the granules to be 20mm, placing the granules in a muffle furnace or a roasting furnace for firing and cooling to obtain the flotation phosphogypsum product organic slag clay light ceramsite.
Preferably, the firing is to preheat the particles to 100 ℃, preheat for 30min, heat the particles to 600 ℃ for 20min, keep the temperature for 20min, heat the particles to 1200 ℃ for 10min, keep the temperature for 20min, cool the particles to 300 ℃ for 1h, and cool the particles to the normal temperature.
The obtained ceramsite has the bulk density of 412kg/m 3 The barrel pressure strength was 5.8MPa.
Example 3
The flotation phosphogypsum product organic residue clay light ceramsite comprises the following raw materials, by weight, 20Kg of flotation phosphogypsum product organic residue, 55Kg of clay, 15Kg of coal gangue, 5Kg of fly ash and 5Kg of calcium carbonate. Wherein the phosphogypsum product organic slag and clay are ground.
The preparation method of the organic residue clay light ceramsite of the phosphogypsum flotation product comprises the following steps:
(1) Drying and grinding the organic residue and clay of the flotation phosphogypsum product, sieving by a sieve of 80 meshes, adding coal gangue, fly ash and calcium carbonate powder, uniformly stirring, adding water according to the water-material mass ratio of 1.
(2) And (2) placing the mixture obtained in the step (1) in a granulator for granulation, enabling the diameter of the granules to be 20mm, placing the granules in a muffle furnace or a roasting furnace for firing and cooling to obtain the flotation phosphogypsum product organic slag clay light ceramsite.
Preferably, the firing is to preheat the particles to 150 ℃, preheat for 30min, heat the particles to 600 ℃ in 20min, keep the temperature for 20min, heat the particles to 1200 ℃ in 10min, keep the temperature for 20min, cool the particles to 300 ℃ in 1h, and cool the particles to the normal temperature.
The obtained ceramsite has the bulk density of 396kg/m 3 The barrel pressure was 5.6MPa.
Example 4
The flotation phosphogypsum product organic residue clay light ceramsite comprises the raw materials of, by weight, 15Kg of flotation phosphogypsum product organic residue, 55Kg of clay, 15Kg of coal gangue, 5Kg of fly ash and 10Kg of calcium carbonate. Wherein the phosphogypsum product, namely organic slag and clay, are ground.
The preparation method of the organic residue clay light ceramsite from the phosphogypsum flotation product comprises the following steps:
(1) Drying and grinding the organic residue and clay of the flotation phosphogypsum product, sieving the dried and ground organic residue and clay by a sieve of 80 meshes, adding coal gangue, fly ash and calcium carbonate powder, uniformly stirring, adding water according to the water-material mass ratio of 1.
(2) And (2) placing the mixture obtained in the step (1) in a granulator for granulation, enabling the diameter of the granules to be 20mm, placing the granules in a muffle furnace or a roasting furnace for firing, and cooling to obtain the flotation phosphogypsum product organic slag clay light ceramsite.
Preferably, the firing is to preheat the particles to 100 ℃, preheat for 30min, heat the particles to 550 ℃ in 20min, keep the temperature for 20min, heat the particles to 1200 ℃ in 10min, keep the temperature for 20min, cool the particles to 300 ℃ in 1h, and cool the particles to the normal temperature.
The obtained ceramsite has the bulk density of 378kg/m 3 The barrel pressure strength was 5.1MPa.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The light organic residue clay ceramsite prepared by the method is characterized by comprising the following raw materials in parts by weight: 10-20 parts of organic residue of the flotation phosphogypsum product, 55-75 parts of clay, 10-15 parts of coal gangue, 5-10 parts of fly ash and 5-10 parts of calcium carbonate.
2. The flotation phosphogypsum product organic slag clay light ceramsite according to claim 1, is characterized in that the flotation phosphogypsum product organic slag comprises the following components in percentage by weight: 50-70% of calcium sulfate dihydrate, 20-40% of organic matters (2-ethyl-1,3 dioxolane, isothiocyanic methane, 3-methoxy-n-pentane and ethylene glycol monomethyl ether acetate), 1-2% of silicon dioxide, 1-2% of ferric oxide and 1-2% of magnesium oxide.
3. The flotation phosphogypsum product organic slag clay light ceramsite according to claim 2, is characterized in that the flotation phosphogypsum product organic slag comprises the following components in percentage by weight: 60% of calcium sulfate dihydrate, 35% of organic matters (2-ethyl-1,3 dioxolane, isothiocyanic methane, 3-methoxy-n-pentane and ethylene glycol monomethyl ether acetate), 1% of silicon dioxide, 2% of ferric oxide and 2% of magnesium oxide.
4. The organic residue clay light ceramsite of the flotation phosphogypsum product as claimed in claim 1, wherein the clay comprises the following components in percentage by weight: 50-67% of silicon dioxide, 17-25% of aluminum oxide, 2-10% of ferric oxide, 1-4% of ferric oxide, 1-8% of calcium oxide, 1-4% of magnesium oxide and 1-3% of potassium oxide.
5. The organic residue clay light ceramsite of the flotation phosphogypsum product as claimed in claim 1, wherein the coal gangue comprises, in percentage by content: 52-65% of silicon dioxide, 16-36% of aluminum oxide, 2-15% of ferric oxide, 1-3% of ferric oxide, 1-5% of calcium oxide, 1-3% of magnesium oxide and 1-3% of potassium oxide.
6. The organic residue clay light ceramsite of the flotation phosphogypsum product as claimed in claim 1, wherein the fly ash comprises, in percentage by weight: 55-65% of silicon dioxide, 25-36% of aluminum oxide, 3-15% of ferric oxide, 1-4% of ferric oxide, 1-5% of calcium oxide, 1-3% of magnesium oxide and 1-3% of potassium oxide.
7. A method for preparing the organic residue clay light ceramsite of the flotation phosphogypsum product of claim 1, which is characterized by comprising the following steps:
a. drying, grinding and sieving the organic residue and clay of the flotation phosphogypsum product, adding coal gangue, fly ash, calcium carbonate powder and water, and uniformly stirring to obtain a mixture;
b. and c, placing the mixture obtained in the step a into a granulator for granulation, placing the granules into a muffle furnace or a roasting furnace for burning and cooling to obtain the flotation phosphogypsum product organic slag clay light ceramsite.
8. The method according to claim 7, wherein: and (b) floating the phosphogypsum product organic slag and clay in the step a, drying, grinding and sieving by using a 80-mesh sieve, wherein the mass ratio of water to materials to other materials is 0.1-0.9.
9. The method according to claim 7, wherein: the diameter of the particles in the step b is 5-25mm, the sintering process is to preheat the particles to 60-150 ℃, preheat for 30min, heat the particles to 550-600 ℃ in 20min, keep the temperature for 20min, heat the particles to 1800-1200 ℃ in 10min, keep the temperature for 20min, and finally cool the particles to 300 ℃ in 1 h.
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