CN111689746A - Prefabricated phosphogypsum floor heating module and preparation method thereof - Google Patents
Prefabricated phosphogypsum floor heating module and preparation method thereof Download PDFInfo
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- CN111689746A CN111689746A CN202010436569.8A CN202010436569A CN111689746A CN 111689746 A CN111689746 A CN 111689746A CN 202010436569 A CN202010436569 A CN 202010436569A CN 111689746 A CN111689746 A CN 111689746A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0015—Machines or methods for applying the material to surfaces to form a permanent layer thereon on multilayered articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/02—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material with fibres or particles being present as additives in the layer
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- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B13/12—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/02044—Separate elements for fastening to an underlayer
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/181—Insulating layers integrally formed with the flooring or the flooring elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/12—Tube and panel arrangements for ceiling, wall, or underfloor heating
- F24D3/14—Tube and panel arrangements for ceiling, wall, or underfloor heating incorporated in a ceiling, wall or floor
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Abstract
The invention belongs to the technical field of building materials, and discloses a prefabricated phosphogypsum floor heating module and a preparation method thereof, which comprise the following steps: (1) first-stage curing: taking a mould, laying expanded perlite powder in the mould, preheating, pouring the uniformly mixed base material into the mould, and curing for 2-3 h; (2) and (5) second-stage maintenance: pouring starch into the mold, and pouring the uniformly mixed heat-insulating layer material for curing for 1.5-2 h; (3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into a mold, curing for 1-2h, pressing a groove for assembling a heat transfer part, continuously curing for 2.2-2.8h, cooling to room temperature, and demolding to obtain a semi-finished product; (4) and (3) calcining: the demolded semi-finished product is calcined for 30-45min at the temperature of 200-.
Description
Technical Field
The invention belongs to the technical field of building materials, and relates to a prefabricated phosphogypsum floor heating module and a preparation method thereof.
Background
With the improvement of life quality and the development of science and technology, floor heating is also continuously developed and changed. The floor heating has the characteristics of comfort, space saving, sanitation, low operating cost and the like, compared with the traditional radiator, the heat efficiency is improved by 20-30%, and the floor heating has the advantages of energy conservation, pollution reduction, high heating efficiency and the like. Currently, a hot water heating floor is classified into a wet type and a dry type according to a structure. The dry floor is divided into a conventional dry floor and a prefabricated floor heating module. The wet floor is characterized in that a heating pipe is embedded in fine aggregate concrete on a ground heat-insulating layer, and a leveling layer and a decorative layer are further arranged on the heating pipe. The conventional dry floor is characterized in that a heating pipe is directly exposed in a structural layer, and decorative layers such as a floor and the like are directly paved on the heating pipe, and the conventional dry floor is easier to maintain than a wet construction method; the structural layer is hollow, so that the mechanical property is poor; the heating pipe has large pipe diameter and large thickness of the structural layer. The prefabricated floor heating module technology is still incomplete at present, respectively has the advantage shortcoming, if: the extruded sheet dry-type floor heating module or the extruded sheet composite aluminum film sheet dry-type floor heating module comprises: the fireproof grade is low, the safety and the compression resistance are low, the continuous heat preservation and the heat storage capacity are poor, the toxic and harmful gases volatilized under the high-temperature condition are not environment-friendly, the product cannot be recycled, the elastic deformation is large, and the application range is limited. Plastics PVC material dry-type ground heating module: the fireproof performance and the continuous heat insulation performance are poor, the high-temperature elastic deformation is large, the service life of the material is short, heat can not be stored, and the application range is limited. The M-shaped floor heating module formed by pressing cement has poor heat insulation and sound insulation performance and heat preservation performance.
Patent number CN201710609615.8 discloses a floor heating plate containing high heat storage and heat storage materials, which comprises a floor heating plate body, wherein each square meter of the floor heating plate body comprises the following components in parts by weight: 1000 parts of 800-calcium hydroxide ion, 35-45 parts of sodium acetate trihydrate, 200 parts of 100-carbon fibers ion, 1-2 parts of kaolin, 6-8 parts of diatomite, 10-20 parts of cellulose, 50-60 parts of building rubber powder, 0.5-1.5 parts of a preservative, 1-2 parts of a foaming agent, 1-2 parts of a waterproof agent, 10-20 parts of a temperature regulator, 60-80 parts of paraffin, 1-3 parts of a thickening agent and 2-4 parts of a nucleating agent. However, the prior art focuses on improvement of structures or materials, lacks consideration of the whole structural relationship, and fails to solve the problem of damage in the demolding process of the floor heating module.
Disclosure of Invention
The invention provides a prefabricated phosphogypsum floor heating module and a preparation method thereof for solving the technical problems.
A prefabricated phosphogypsum floor heating module sequentially comprises a heat transfer layer, a heat preservation layer and a base layer from top to bottom; the heat transfer layer is provided with a groove for assembling a heat transfer component; the heat transfer layer is made of the following raw materials: 20-26 parts of acid modified phosphogypsum, 1-4 parts of iron powder, 11-15 parts of vermiculite powder, 8-13 parts of carbon fiber, 7-16 parts of polypropylene fiber and 2-7 parts of coal gangue powder.
The thickness of the heat transfer layer in the floor heating module is 10-12mm, the thickness of the heat preservation layer is 10-12mm, the thickness of the base layer is 8-10mm, and the total thickness is less than or equal to 32 mm.
The acid modified phosphogypsum is prepared by dissolving myristic acid and palmitic acid in water according to the mass ratio of 17:83 to prepare a solution with the mass concentration of 10-15%, heating to 42-48 ℃, carrying out heat preservation dynamic reaction for 15-20min, and adding phosphogypsum until the solid-liquid mass ratio is 1: (3-4), then preserving heat for dynamic reaction for 20-30min, then placing the mixture under the condition of 300-800W microwave for reaction for 30-60s, and then drying and grinding the mixture until the mixture is sieved by a 200-600 mesh sieve.
According to the invention, acid modified phosphogypsum, iron powder, paraffin, vermiculite powder, carbon fiber, polypropylene fiber and coal gangue powder are used as raw materials of the heat transfer layer, wherein the iron powder is doped to improve the heat transfer capability, the vermiculite powder and the coal gangue powder can effectively delay the loss of the iron powder, prolong the service life of the iron powder, passivate the chemical activity of the iron powder and simultaneously ensure that the supercooling degree of the heat transfer layer is low; the carbon fiber and the polyacrylic acid fiber not only can enhance the mechanical property, but also have the adsorption effect, can adsorb sound waves, and can convert part of the sound waves into heat energy by combining with the acid modified phosphogypsum.
The heat-insulating layer is prepared from the following raw materials: 21-33 parts of polyphenyl granules, 12-16 parts of desulfurized gypsum, 5-9 parts of ternary molten salt modified wheat shell powder and 1-3 parts of paraffin.
The ternary molten salt is a mixture of sodium chloride, potassium chloride and calcium chloride.
The ternary molten salt modified wheat shell powder is prepared by mixing wheat shell powder and water according to a mass ratio of 1: (3-4), heating to 80-90 ℃, preserving heat for 10-20min, adding ternary molten salt, stirring uniformly, reacting for 60-90s under the microwave condition of 200-500W, drying, and grinding until the mixture passes through a 200-600-mesh sieve.
According to the invention, the polyphenyl particles, the desulfurized gypsum, the ternary molten salt modified wheat hull powder and the paraffin are used as the raw materials of the heat-insulating layer, the polyphenyl particles are doped with the polyphenyl particles, so that the heat-insulating and fireproof performances are good, the paraffin is doped, the problem of weak bonding force between the polyphenyl particles and the desulfurized gypsum is effectively solved, the ternary molten salt modified wheat hull powder is used, the wheat hull powder contains combustible components and foaming components, pores with uniform sizes are further formed, the combustion heat of the wheat hull powder can be absorbed and released by using the pore structure of the desulfurized gypsum, and meanwhile, the thermal stability of the heat-insulating layer is improved by using the ternary molten salt which is difficult to decompose, so that the heat-insulating layer.
The base layer is made of the following raw materials: 32-45 parts of Portland cement, 13-21 parts of phosphogypsum, 9-18 parts of polyvinyl alcohol and 6-14 parts of yellow phosphorus slag.
The invention uses the Portland cement, the phosphogypsum, the polyvinyl alcohol and the yellow phosphorus slag as the raw materials of the base layer, has better mechanical property, can prevent the generation of cracks and the corrosion, and simultaneously consumes the industrial wastes of the phosphogypsum, the yellow phosphorus slag and the like.
A preparation method of a prefabricated phosphogypsum floor heating module comprises the following steps:
(1) first-stage curing: taking a mould, laying expanded perlite powder in the mould, preheating, pouring the uniformly mixed base material into the mould, and maintaining for 2-3h at 90-100 ℃;
(2) and (5) second-stage maintenance: pouring starch into the mold, pouring the uniformly mixed heat insulation layer material, and curing for 1.5-2h at the temperature of 120-;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into the mold, curing for 1-2h at 135-150 ℃, pressing a groove for assembling the heat transfer part, continuing curing for 2.2-2.8h, cooling to room temperature, and demolding to obtain a semi-finished product;
(4) and (3) calcining: calcining the demolded semi-finished product at the temperature of 200-300 ℃ for 30-45min to obtain the finished product.
Further preferably, the preparation method of the prefabricated phosphogypsum floor heating module comprises the following steps:
(1) first-stage curing: taking a mold, laying expanded perlite powder with the thickness of 1-2mm in the mold, preheating to 40-50 ℃, pouring the uniformly mixed base material into the mold, and maintaining for 2-3h at the temperature of 90-100 ℃; the base layer material is prepared from a base layer raw material and water in a mass ratio of 1: (4-6) mixing;
(2) and (5) second-stage maintenance: pouring starch with the thickness of 1-2mm into the mold, pouring the uniformly mixed heat insulation layer material, and curing for 1.5-2h at the temperature of 120-; the heat-insulating layer is prepared from heat-insulating layer raw materials and water in a mass ratio of 1: (2-3) mixing;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into the mold, curing for 1-2h at 135-150 ℃, pressing a groove for assembling the heat transfer part, continuing curing for 2.2-2.8h, cooling to room temperature, and demolding to obtain a semi-finished product; the heat transfer layer material is prepared from a heat transfer layer raw material and water in a mass ratio of 1: (1-2) mixing;
(4) and (3) calcining: calcining the demolded semi-finished product at the temperature of 200-300 ℃ for 30-45min to obtain the finished product.
According to the method, the perlite powder is laid and preheated before the base material is poured, so that the perlite powder expands, the semi-finished product is easy to demould, the integrity of the finished product and the integrity of a mould can be ensured, the base material is poured firstly so that the base material is solidified and reinforced, then the starch and the heat-insulating layer material are poured, the starch is enabled to play a higher bonding role under the action of maintenance water and the gravity extrusion of the heat-insulating layer material, and the bonding degree of the base layer and the heat-insulating layer is improved; and then pouring heat transfer materials after half forming, and finally calcining after forming to burn the wheat husks, so that the mechanical property of a heat transfer layer is enhanced, and non-intercommunicated pores are formed in the heat preservation layer, thereby improving the heat preservation property and the heat storage capacity of the floor heating module.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the floor heating module has the characteristics of light weight, heat preservation, sound insulation and fire prevention, and has the advantages of good mechanical property, high heat conduction speed, stable heat dissipation, strong heat storage capacity and thermal cycle capacity, high safety performance and long service life, large-batch industrial wastes are used, the problem of accumulation of industrial solid wastes is relieved, the prefabricated floor heating module is easy to construct, and only needs to be assembled during field construction.
Detailed Description
The following is a detailed description of the embodiments of the present invention, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments are included in the scope of the present invention as claimed in the claims.
Example 1
A prefabricated phosphogypsum floor heating module sequentially comprises a heat transfer layer, a heat preservation layer and a base layer from top to bottom; the heat transfer layer is provided with a groove for assembling a heat transfer component; the thickness of a heat transfer layer in the floor heating module is 12mm, the thickness of a heat preservation layer is 12mm, and the thickness of a base layer is 8 mm;
the heat transfer layer is composed of the following materials: 26 parts of acid modified phosphogypsum, 4 parts of iron powder, 15 parts of vermiculite powder, 13 parts of carbon fiber, 16 parts of polypropylene fiber and 7 parts of coal gangue powder;
the acid modified phosphogypsum is prepared by dissolving myristic acid and palmitic acid in water according to the mass ratio of 17:83 to prepare a solution with the mass concentration of 15%, heating to 48 ℃, carrying out heat preservation dynamic reaction for 20min, and adding phosphogypsum until the solid-liquid mass ratio is 1: 4, performing dynamic reaction for 30min under heat preservation, then placing the mixture under the condition of 800W microwave for reaction for 60s, and then drying and grinding the mixture until the mixture is sieved by a 600-mesh sieve;
the heat-insulating layer is composed of the following materials: 33 parts of polyphenyl particles, 16 parts of desulfurized gypsum, 9 parts of ternary molten salt modified wheat shell powder and 3 parts of paraffin;
the ternary molten salt is a mixture of sodium chloride, potassium chloride and calcium chloride in equal mass ratio;
the ternary molten salt modified wheat shell powder is prepared by mixing wheat shell powder and water according to a mass ratio of 1: 4, after mixing, heating to 90 ℃, keeping the temperature for 20min, adding ternary molten salt, stirring uniformly, then placing the mixture under the condition of 500W microwave for reacting for 90s, and then drying and grinding the mixture until the mixture is sieved by a 600-mesh sieve;
the base layer is composed of the following materials: 45 parts of Portland cement, 21 parts of phosphogypsum, 18 parts of polyvinyl alcohol and 14 parts of yellow phosphorus slag;
a preparation method of a prefabricated phosphogypsum floor heating module comprises the following steps:
(1) first-stage curing: taking a mould, laying expanded perlite powder with the thickness of 2mm in the mould, preheating to 50 ℃, pouring the uniformly mixed base material into the mould, and maintaining for 3 hours at the temperature of 100 ℃; the base layer material is prepared from a base layer raw material and water in a mass ratio of 1: 6, mixing;
(2) and (5) second-stage maintenance: pouring starch with the thickness of 2mm into the mold, pouring the uniformly mixed heat insulation layer material, and maintaining for 2 hours at the temperature of 130 ℃; the heat-insulating layer is prepared from heat-insulating layer raw materials and water in a mass ratio of 1: 3, mixing;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into a mold, pressing a groove for assembling a heat transfer part after curing for 2 hours at 150 ℃, continuing curing for 2.8 hours, cooling to room temperature, and demolding to obtain a semi-finished product; the heat transfer layer material is prepared from a heat transfer layer raw material and water in a mass ratio of 1:2, mixing;
(4) and (3) calcining: and calcining the demolded semi-finished product at 300 ℃ for 45min to obtain the composite material.
The floor heating module obtained in example 1 was tested as follows:
detecting the heat conductivity according to the GB/T20473-2006 standard;
the sound insulation performance is detected according to the GBJ118 standard;
the test results are shown in table 1;
TABLE 1
Example 2
A prefabricated phosphogypsum floor heating module sequentially comprises a heat transfer layer, a heat preservation layer and a base layer from top to bottom; the heat transfer layer is provided with a groove for assembling a heat transfer component; the thickness of a heat transfer layer in the floor heating module is 10mm, the thickness of a heat preservation layer is 10mm, and the thickness of a base layer is 10 mm;
the heat transfer layer is composed of the following materials: 20 parts of acid modified phosphogypsum, 1 part of iron powder, 11 parts of vermiculite powder, 8 parts of carbon fiber, 7 parts of polypropylene fiber and 2 parts of coal gangue powder;
the acid modified phosphogypsum is prepared by dissolving myristic acid and palmitic acid in water according to the mass ratio of 17:83 to prepare a solution with the mass concentration of 10%, heating to 42 ℃, carrying out heat preservation dynamic reaction for 15min, and adding phosphogypsum until the solid-liquid mass ratio is 1: 3, performing dynamic reaction for 20min under heat preservation, then placing the mixture under the condition of 300W microwave for reaction for 30s, and then drying and grinding the mixture until the mixture is sieved by a 200-mesh sieve;
the heat-insulating layer is composed of the following materials: 21 parts of polyphenyl granules, 12 parts of desulfurized gypsum, 5 parts of ternary molten salt modified wheat shell powder and 1 part of paraffin;
the ternary molten salt is a mixture of sodium chloride, potassium chloride and calcium chloride;
the ternary molten salt modified wheat shell powder is prepared by mixing wheat shell powder and water according to a mass ratio of 1: 3, after mixing, heating to 80 ℃ and preserving heat for 10min, adding ternary molten salt, stirring uniformly, then placing the mixture under a 200W microwave condition for reaction for 60s, and then drying and grinding the mixture until the mixture is sieved by a 200-mesh sieve;
the base layer is composed of the following materials: 32 parts of Portland cement, 13 parts of phosphogypsum, 9 parts of polyvinyl alcohol and 6 parts of yellow phosphorus slag;
a preparation method of a prefabricated phosphogypsum floor heating module comprises the following steps:
(1) first-stage curing: taking a mould, laying expanded perlite powder with the thickness of 1mm in the mould, preheating to 40 ℃, pouring the uniformly mixed base material into the mould, and maintaining for 2 hours at the temperature of 90 ℃; the base layer material is prepared from a base layer raw material and water in a mass ratio of 1: 4, mixing;
(2) and (5) second-stage maintenance: pouring starch with the thickness of 1mm into the mold, pouring the uniformly mixed heat insulation layer material, and maintaining for 1.5h at the temperature of 120 ℃; the heat-insulating layer is prepared from heat-insulating layer raw materials and water in a mass ratio of 1:2, mixing;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into a mold, curing for 1h at 135 ℃, pressing a groove for assembling a heat transfer part, continuing curing for 2.2h, cooling to room temperature, and demolding to obtain a semi-finished product; the heat transfer layer material is prepared from a heat transfer layer raw material and water in a mass ratio of 1:1, mixing;
(4) and (3) calcining: calcining the demolded semi-finished product at 200 ℃ for 30min to obtain the finished product.
The floor heating module obtained in example 2 was tested as follows:
detecting the heat conductivity according to the GB/T20473-2006 standard;
the sound insulation performance is detected according to the GBJ118 standard;
the test results are shown in table 2;
TABLE 2
Example 3
A prefabricated phosphogypsum floor heating module sequentially comprises a heat transfer layer, a heat preservation layer and a base layer from top to bottom; the heat transfer layer is provided with a groove for assembling a heat transfer component; the thickness of a heat transfer layer in the floor heating module is 11mm, the thickness of a heat preservation layer is 11mm, and the thickness of a base layer is 10 mm;
the heat transfer layer is composed of the following materials: 23 parts of acid modified phosphogypsum, 2 parts of iron powder, 13 parts of vermiculite powder, 10 parts of carbon fiber, 11 parts of polypropylene fiber and 4 parts of coal gangue powder;
the acid modified phosphogypsum is prepared by dissolving myristic acid and palmitic acid in water according to the mass ratio of 17:83 to prepare a solution with the mass concentration of 12%, heating to 45 ℃, carrying out heat preservation dynamic reaction for 17min, and adding phosphogypsum until the solid-liquid mass ratio is 1: 3.5, dynamically reacting for 25min under the condition of heat preservation, reacting for 45s under the condition of 550W microwave, drying, and grinding until the mixture is sieved by a 400-mesh sieve;
the heat-insulating layer is composed of the following materials: 27 parts of polyphenyl granules, 14 parts of desulfurized gypsum, 7 parts of ternary molten salt modified wheat shell powder and 2 parts of paraffin;
the ternary molten salt is a mixture of sodium chloride, potassium chloride and calcium chloride according to a mass ratio of 1:2: 1;
the ternary molten salt modified wheat shell powder is prepared by mixing wheat shell powder and water according to a mass ratio of 1: 3.5, heating to 85 ℃, keeping the temperature for 15min, adding the ternary molten salt, uniformly stirring, reacting for 75s under the condition of 300W microwave, drying, and grinding until the mixture is sieved by a 400-mesh sieve;
the base layer is composed of the following materials: 37 parts of Portland cement, 17 parts of phosphogypsum, 14 parts of polyvinyl alcohol and 10 parts of yellow phosphorus slag;
a preparation method of a prefabricated phosphogypsum floor heating module comprises the following steps:
(1) first-stage curing: taking a mould, laying expanded perlite powder with the thickness of 1.5mm in the mould, preheating to 45 ℃, pouring the uniformly mixed base material into the mould, and maintaining for 2.5 hours at the temperature of 95 ℃; the base layer material is prepared from a base layer raw material and water in a mass ratio of 1: 5, mixing the components;
(2) and (5) second-stage maintenance: pouring starch with the thickness of 1.5mm into the mold, pouring the uniformly mixed heat insulation layer material, and maintaining for 1.8h at the temperature of 125 ℃; the heat-insulating layer is prepared from heat-insulating layer raw materials and water in a mass ratio of 1: 2.5 mixing;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into a mold, maintaining at 140 ℃ for 1.5h, pressing a groove for assembling a heat transfer part, continuing to maintain for 2.5h, cooling to room temperature, and demolding to obtain a semi-finished product; the heat transfer layer material is prepared from a heat transfer layer raw material and water in a mass ratio of 1: 1.5 mixing;
(4) and (3) calcining: and calcining the demolded semi-finished product at 250 ℃ for 38min to obtain the composite material.
The floor heating module obtained in example 3 was tested as follows:
detecting the heat conductivity according to the GB/T20473-2006 standard;
the sound insulation performance is detected according to the GBJ118 standard;
the test results are shown in table 3;
TABLE 3
Example 4
A prefabricated phosphogypsum floor heating module sequentially comprises a heat transfer layer, a heat preservation layer and a base layer from top to bottom; the heat transfer layer is provided with a groove for assembling a heat transfer component; the thickness of a heat transfer layer in the floor heating module is 10mm, the thickness of a heat preservation layer is 12mm, the thickness of a base layer is 10mm, and the total thickness is less than or equal to 32 mm;
the heat transfer layer is composed of the following materials: 26 parts of acid modified phosphogypsum, 4 parts of iron powder, 11 parts of vermiculite powder, 13 parts of carbon fiber, 7 parts of polypropylene fiber and 2 parts of coal gangue powder;
the acid modified phosphogypsum is prepared by dissolving myristic acid and palmitic acid in water according to the mass ratio of 17:83 to prepare a solution with the mass concentration of 10%, heating to the temperature of 46 ℃, carrying out heat preservation dynamic reaction for 17min, and adding phosphogypsum until the solid-liquid mass ratio is 1: 3.5, dynamically reacting for 25min under the condition of heat preservation, reacting for 45s under the condition of 500W microwave, drying, and grinding until the mixture is sieved by a 500-mesh sieve;
the heat-insulating layer is composed of the following materials: 21 parts of polyphenyl granules, 16 parts of desulfurized gypsum, 9 parts of ternary molten salt modified wheat shell powder and 1 part of paraffin;
the ternary molten salt is a mixture of sodium chloride, potassium chloride and calcium chloride according to the mass ratio of 2:1: 1;
the ternary molten salt modified wheat shell powder is prepared by mixing wheat shell powder and water according to a mass ratio of 1: 3, heating to 88 ℃ after mixing, keeping the temperature for 12min, adding ternary molten salt, stirring uniformly, reacting for 80s under the condition of 400W microwave, drying, and grinding until the mixture is sieved by a 600-mesh sieve;
the base layer is composed of the following materials: 32 parts of Portland cement, 13 parts of phosphogypsum, 18 parts of polyvinyl alcohol and 14 parts of yellow phosphorus slag;
a preparation method of a prefabricated phosphogypsum floor heating module comprises the following steps:
(1) first-stage curing: taking a mould, paving expanded perlite powder with the thickness of 1mm in the mould, preheating to 45 ℃, pouring the uniformly mixed base material into the mould, and maintaining for 2.3 hours at the temperature of 97 ℃; the base layer material is prepared from a base layer raw material and water in a mass ratio of 1: 5.5 mixing;
(2) and (5) second-stage maintenance: pouring starch with the thickness of 2mm into the mold, pouring the uniformly mixed heat insulation layer material, and curing for 1.5-2h at the temperature of 120-; the heat-insulating layer is prepared from heat-insulating layer raw materials and water in a mass ratio of 1: (2-3) mixing;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into a mold, maintaining at 145 ℃ for 1.5h, pressing a groove for assembling a heat transfer part, continuing to maintain for 2.6h, cooling to room temperature, and demolding to obtain a semi-finished product; the heat transfer layer material is prepared from a heat transfer layer raw material and water in a mass ratio of 1: 1.5 mixing;
(4) and (3) calcining: calcining the demolded semi-finished product at 250 ℃ for 40min to obtain the finished product.
The floor heating module obtained in example 4 was tested as follows:
detecting the heat conductivity according to the GB/T20473-2006 standard;
the sound insulation performance is detected according to the GBJ118 standard;
the test results are shown in table 4;
TABLE 4
Comparative example 1
On the basis of the embodiment 1, the difference from the embodiment 1 is that: replacing the acid modified phosphogypsum for the phosphogypsum in the heat transfer layer;
the floor heating module obtained in comparative example 1 was tested as follows:
detecting the heat conductivity according to the GB/T20473-2006 standard;
the sound insulation performance is detected according to the GBJ118 standard;
the test results are shown in table 5;
TABLE 5
Comparative example 2
On the basis of the embodiment 2, the difference from the embodiment 2 is that: the heat-insulating layer is not modified by ternary molten salt.
The floor heating module obtained in comparative example 2 was tested as follows:
detecting the heat conductivity according to the GB/T20473-2006 standard;
the sound insulation performance is detected according to the GBJ118 standard;
the test results are shown in table 6;
TABLE 6
Comparative example 3
On the basis of example 3, the difference from example 3 is that: the preparation method of the phosphogypsum floor heating module comprises the following steps:
(1) first-stage curing: taking a mold A, paving expanded perlite powder with the thickness of 1.5mm in the mold A, preheating to 45 ℃, pouring the uniformly mixed base material into the mold, and maintaining at 95 ℃ until molding; the base layer material is prepared from a base layer raw material and water in a mass ratio of 1: 5, mixing the components;
(2) and (5) second-stage maintenance: pouring the uniformly mixed heat-insulating layer material into the die B, and maintaining at 125 ℃ until forming; the heat-insulating layer is prepared from heat-insulating layer raw materials and water in a mass ratio of 1: 2.5 mixing;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into the die C, pressing a groove for assembling a heat transfer part after curing for 1.5h at 140 ℃, and continuing curing until forming; the heat transfer layer material is prepared from a heat transfer layer raw material and water in a mass ratio of 1: 1.5 mixing;
(4) and (3) calcining: and (3) stacking the heat transfer layer, the heat preservation layer and the base layer obtained in the steps (1), (2) and (3) from top to bottom, connecting each layer by using a binder, and calcining at 250 ℃ for 38min to obtain the heat-insulating layer.
The floor heating module obtained in comparative example 3 was tested as follows:
detecting the heat conductivity according to the GB/T20473-2006 standard;
the sound insulation performance is detected according to the GBJ118 standard;
the test results are shown in table 7;
TABLE 7
Comparative example 4
On the basis of the embodiment 4, the difference from the embodiment 4 is that: in the step (1) of the preparation method of the phosphogypsum floor heating module, expanded perlite powder with the thickness of 1mm is not paved in the mould;
after taking 500 pieces of each half-finished product after demoulding of comparative example 4 and example 4, the base layer bottom damage rate of the comparative example 4 is 21.5 percent, and the base layer bottom damage rate of the example 4 is only 0.96 percent.
Claims (9)
1. A prefabricated phosphogypsum floor heating module is characterized in that a heat transfer layer, a heat preservation layer and a base layer are sequentially arranged from top to bottom; the heat transfer layer is provided with a groove for assembling a heat transfer component; the heat transfer layer is made of the following raw materials: 20-26 parts of acid modified phosphogypsum, 1-4 parts of iron powder, 11-15 parts of vermiculite powder, 8-13 parts of carbon fiber, 7-16 parts of polypropylene fiber and 2-7 parts of coal gangue powder.
2. The prefabricated phosphogypsum floor heating module as claimed in claim 1, wherein the thickness of the heat transfer layer in the floor heating module is 10-12mm, the thickness of the heat preservation layer is 10-12mm, the thickness of the base layer is 8-10mm, and the total thickness is less than or equal to 32 mm.
3. The prefabricated phosphogypsum floor heating module as claimed in claim 1, wherein the acid-modified phosphogypsum is prepared by dissolving myristic acid and palmitic acid in water according to the mass ratio of 17:83 to prepare a solution with the mass concentration of 10-15%, heating to 42-48 ℃, carrying out heat preservation dynamic reaction for 15-20min, and adding phosphogypsum until the solid-liquid mass ratio is 1: (3-4), then preserving heat for dynamic reaction for 20-30min, then placing the mixture under the condition of 300-800W microwave for reaction for 30-60s, and then drying and grinding the mixture until the mixture is sieved by a 200-600 mesh sieve.
4. The prefabricated phosphogypsum floor heating module as claimed in claim 1, wherein the heat-insulating layer is made of the following raw materials: 21-33 parts of polyphenyl granules, 12-16 parts of desulfurized gypsum, 5-9 parts of ternary molten salt modified wheat shell powder and 1-3 parts of paraffin.
5. The prefabricated phosphogypsum floor heating module as claimed in claim 4, wherein the ternary molten salt is a mixture of sodium chloride, potassium chloride and calcium chloride.
6. The prefabricated phosphogypsum floor heating module as claimed in claim 4, wherein the ternary molten salt modified wheat shell powder is prepared by mixing wheat shell powder and water according to the mass ratio of 1: (3-4), heating to 80-90 ℃, preserving heat for 10-20min, adding ternary molten salt, stirring uniformly, reacting for 60-90s under the microwave condition of 200-500W, drying, and grinding until the mixture passes through a 200-600-mesh sieve.
7. The prefabricated phosphogypsum floor heating module as claimed in claim 1, wherein the base layer is made of the following raw materials: 32-45 parts of Portland cement, 13-21 parts of phosphogypsum, 9-18 parts of polyvinyl alcohol and 6-14 parts of yellow phosphorus slag.
8. A method for manufacturing a prefabricated phosphogypsum floor heating module as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
(1) first-stage curing: taking a mould, laying expanded perlite powder in the mould, preheating, pouring the uniformly mixed base material into the mould, and curing for 2-3 h;
(2) and (5) second-stage maintenance: pouring starch into the mold, and pouring the uniformly mixed heat-insulating layer material for curing for 1.5-2 h;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into a mold, curing for 1-2h, pressing a groove for assembling a heat transfer part, continuously curing for 2.2-2.8h, cooling to room temperature, and demolding to obtain a semi-finished product;
(4) and (3) calcining: calcining the demolded semi-finished product at the temperature of 200-300 ℃ for 30-45min to obtain the finished product.
9. A method for manufacturing a prefabricated phosphogypsum floor heating module as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
(1) first-stage curing: taking a mold, laying expanded perlite powder with the thickness of 1-2mm in the mold, preheating to 40-50 ℃, pouring the uniformly mixed base material into the mold, and maintaining for 2-3h at the temperature of 90-100 ℃; the base layer material is prepared from a base layer raw material and water in a mass ratio of 1: (4-6) mixing;
(2) and (5) second-stage maintenance: pouring starch with the thickness of 1-2mm into the mold, pouring the uniformly mixed heat insulation layer material, and curing for 1.5-2h at the temperature of 120-; the heat-insulating layer is prepared from heat-insulating layer raw materials and water in a mass ratio of 1: (2-3) mixing;
(3) and (3) curing in the third stage: pouring the uniformly mixed heat transfer layer material into the mold, curing for 1-2h at 135-150 ℃, pressing a groove for assembling the heat transfer part, continuing curing for 2.2-2.8h, cooling to room temperature, and demolding to obtain a semi-finished product; the heat transfer layer material is prepared from a heat transfer layer raw material and water in a mass ratio of 1: (1-2) mixing;
(4) and (3) calcining: calcining the demolded semi-finished product at the temperature of 200-300 ℃ for 30-45min to obtain the finished product.
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Application publication date: 20200922 |