CN113232124A - Production process of moisture-proof phosphorus building gypsum board - Google Patents
Production process of moisture-proof phosphorus building gypsum board Download PDFInfo
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- CN113232124A CN113232124A CN202110619186.9A CN202110619186A CN113232124A CN 113232124 A CN113232124 A CN 113232124A CN 202110619186 A CN202110619186 A CN 202110619186A CN 113232124 A CN113232124 A CN 113232124A
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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
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
-
- 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
-
- 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
- B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
-
- 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
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
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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
-
- 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
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5016—Acids
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
- C04B41/5084—Lime, hydraulic lime or magnesium oxide cements
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Mining & Mineral Resources (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a production process of a moisture-proof phosphorus building gypsum board, and belongs to the field of building materials. The method comprises the steps of mixing and stirring raw materials, pressing and forming gypsum boards, primarily cutting, carrying out negative-pressure acid leaching treatment, carrying out negative-pressure alkali leaching treatment, drying, accurately cutting and the like. The process has simple technical route, adopts phosphorus building gypsum as main raw materials and wastewater discharged during phosphoric acid preparation by an industrial wet method, is green and environment-friendly, and has outstanding economic benefit; compared with the traditional production process of the water-resistant gypsum board, the process disclosed by the invention is inorganic waterproof, and the fire resistance of the gypsum-based building material product is not reduced; and the gypsum board has the water resistance in the structure, and the whole water resistance is not influenced under the condition of local damage.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a production process of a moisture-proof phosphorus building gypsum board.
Background
Gypsum is one of the widely used building materials, typically air-hardening, and presents a significant shortfall in water resistance compared to cement-based materials. Various gypsum boards commonly found in the market are mostly damp-proof and water-proof products. The current technical route for producing the moisture-proof gypsum board is as follows: one is that latex powder, PVA and other organic waterproof components are doped in the gypsum board, but the fireproof performance of the gypsum board is reduced; the other is the way of applying a waterproof coating on the surface, but in case of local breakage of the gypsum board, the water resistance of the gypsum board is remarkably reduced.
Disclosure of Invention
In view of the above, the invention provides a production process of a moisture-proof phosphorus building gypsum board, which can effectively improve the water resistance of the gypsum board.
In order to achieve the purpose, the invention provides the following technical scheme:
a production process of a moisture-proof phosphorus building gypsum board is characterized by comprising the following steps:
(1) mixing and stirring the raw materials;
(2) pressing and forming the gypsum board;
(3) primarily cutting the gypsum board;
(4) carrying out negative pressure acid leaching treatment;
(5) negative pressure alkaline leaching treatment
(6) Naturally drying;
(7) heating and drying;
(8) and (5) accurately cutting the gypsum board.
Preferably, in the production process of the moisture-proof phosphorus building gypsum board, the main raw material is phosphorus building gypsum powder or other types of building gypsum powder are used for replacing the phosphorus building gypsum powder; other raw materials are 6mm chopped basalt fibers or are replaced by glass fibers, and the using amount is 1 percent (calculated by the mass of the phosphorus building gypsum); the water consumption is 30 percent (based on the mass of the phosphorus building gypsum).
Preferably, in the production process of the moisture-proof phosphorus building gypsum board, the gypsum board is extruded and formed under low fluidity, and then is primarily cut, and the size of the gypsum board is slightly larger than the standard size;
preferably, in the production process of the moisture-proof phosphorus building gypsum board, the gypsum board after primary cutting is soaked in an acid solution for 2-3 hours under a negative pressure state (the pressure is more than-0.1 MPa), and the acid solution is wastewater generated in the preparation of phosphoric acid by an industrial wet method or a phosphoric acid solution with the concentration of more than 5 mol/L.
Preferably, in the above process for producing a moisture-proof phosphorus building gypsum board, the acid-dipped gypsum board is dipped in an alkaline solution under a negative pressure (pressure greater than-0.1 MPa) for 2-3 hours, wherein the alkaline solution is saturated lime water or a sodium hydroxide solution with a concentration of 1mol/L or more, or other alkaline solutions with a pH greater than 13.
Preferably, in the production process of the moisture-proof phosphorus building gypsum board, the gypsum board subjected to alkaline leaching is naturally dried, then is rapidly dried at high temperature, and then is precisely cut to obtain the moisture-proof phosphorus building gypsum board with standard size.
The technical principle of the invention is as follows:
(1) the extrusion molding is carried out under low fluidity, so that the water consumption of gypsum can be effectively reduced, and the mechanical strength of the gypsum board is improved;
(2) the negative pressure acid leaching treatment is adopted, so that the phosphoric acid and calcium sulfate dihydrate which is the main component of the gypsum board react to generate a layer of calcium monohydrogen phosphate or calcium dihydrogen phosphate crystals on the surface and in the pores of the gypsum board.
(3) By adopting negative pressure alkaline leaching treatment, a layer of calcium monohydrogen phosphate or calcium dihydrogen phosphate generated in the last step can be converted into insoluble calcium phosphate crystals, and the insoluble calcium phosphate crystals are attached to the surface of the gypsum board or in the pores to prevent the calcium sulfate dihydrate from being dissolved by water, so that the water resistance of the gypsum board is improved.
Ca(H2PO4)2+4OH-→CaPO4↓+4H2O
CaHPO4+OH-→CaPO4↓+H2O
(4) Under the negative pressure state, the acid and alkali solution can more quickly enter the pores of the gypsum board to fully generate the required chemical reaction.
According to the technical scheme, compared with the prior art, the invention has the beneficial effects that:
(1) the process has simple technical route, adopts phosphorus building gypsum as main raw materials and wastewater discharged during phosphoric acid preparation by an industrial wet method, is green and environment-friendly, and has outstanding economic benefit;
(2) compared with the traditional production process of the water-resistant gypsum board, the process disclosed by the invention is inorganic waterproof, and the fire resistance of the gypsum-based building material product is not reduced;
(3) different from the common surface waterproof process, the process of the invention can lead the gypsum board to have the structural internal waterproof performance, and the integral waterproof performance is not influenced under the condition of local damage;
(4) the process of the invention can effectively improve the water resistance of the gypsum board.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached figure 1, the production process of the moisture-proof phosphorus building gypsum board disclosed by the invention is characterized by comprising the following steps:
(1) mixing and stirring the raw materials;
(2) pressing and forming the gypsum board;
(3) primarily cutting the gypsum board;
(4) carrying out negative pressure acid leaching treatment;
(5) negative pressure alkaline leaching treatment
(6) Naturally drying;
(7) heating and drying;
(8) and (5) accurately cutting the gypsum board.
In order to further optimize the technical scheme, the main raw material is phosphorus building gypsum powder or other types of building gypsum powder are used for replacing the phosphorus building gypsum powder; other raw materials are 6mm chopped basalt fibers or are replaced by glass fibers, and the using amount is 1 percent (calculated by the mass of the phosphorus building gypsum); the water consumption is 30 percent (based on the mass of the phosphorus building gypsum).
In order to further optimize the technical scheme, the gypsum board is extruded and formed under low fluidity, and then is primarily cut, and the size of the gypsum board is slightly larger than the standard size;
in order to further optimize the technical scheme, the gypsum board after primary cutting is soaked in an acid solution for 2-3 hours under a negative pressure state (the pressure is more than-0.1 MPa), wherein the acid solution is waste water for preparing phosphoric acid by an industrial wet method or a phosphoric acid solution with the concentration of more than 5 mol/L.
In order to further optimize the technical scheme, the gypsum board after acid leaching is soaked in an alkaline solution for 2 to 3 hours under a negative pressure state (the pressure is more than minus 0.1MPa), wherein the alkaline solution is saturated lime water or a sodium hydroxide solution with the concentration of more than 1mol/L, or other alkaline solutions with the pH value of more than 13.
In order to further optimize the technical scheme, the gypsum board subjected to alkaline leaching treatment is naturally dried, then is rapidly dried at high temperature, and then is precisely cut to obtain the moisture-proof phosphorus building gypsum board with standard size.
Example 1:
the production process for preparing the phosphorus building gypsum board specifically comprises the following steps:
(1) 100kg of phosphorus building gypsum powder and 1kg of 6mm short-cut basalt fiber are adopted as raw materials, the water consumption is 30kg, and the raw materials are mixed and stirred uniformly to obtain gypsum slurry.
(2) Extruding the gypsum slurry into a board with the thickness of 9.5mm, airing the board for a short time after final setting, and then primarily cutting the board to obtain the gypsum board with the size of 950 mm/1850 mm;
(3) and (3) soaking the gypsum board after the primary cutting for 3 hours by using wastewater of phosphoric acid prepared by an industrial wet method under the state of-0.15 MPa.
(4) And soaking the gypsum board subjected to acid leaching treatment in saturated lime water for 3 hours under the condition of-0.15 MPa.
(5) And (3) rapidly drying the gypsum board subjected to alkaline leaching at 300 ℃, and then accurately cutting to obtain the moisture-proof phosphorus building gypsum board with the size of 900mm x 1800 mm.
The mechanical strength and the softening coefficient of the prepared moisture-proof phosphorus building gypsum board are tested, the breaking load reaches 510KN, and the softening coefficient reaches 0.81.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A production process of a moisture-proof phosphorus building gypsum board is characterized by comprising the following steps:
(1) mixing and stirring the raw materials;
(2) pressing and forming the gypsum board;
(3) primarily cutting the gypsum board;
(4) carrying out negative pressure acid leaching treatment;
(5) negative pressure alkaline leaching treatment
(6) Naturally drying;
(7) heating and drying;
(8) and (5) accurately cutting the gypsum board.
2. The process for producing moisture-and phosphorus-resistant building gypsum board according to claim 1, wherein: the main raw material is phosphorus building gypsum powder or other types of building gypsum powder; other raw materials are 6mm chopped basalt fibers or are replaced by glass fibers, and the using amount is 1 percent (calculated by the mass of the phosphorus building gypsum); the water consumption is 30 percent (based on the mass of the phosphorus building gypsum).
3. The process for producing moisture-and phosphorus-resistant building gypsum board according to claim 1, wherein: the gypsum board is extruded and formed under low fluidity, and then is primarily cut, and the size of the gypsum board is slightly larger than the standard size.
4. The process for producing moisture-and phosphorus-resistant building gypsum board according to claim 1, wherein: and (3) soaking the gypsum board subjected to primary cutting for 2-3 hours in an acid solution under a negative pressure state (the pressure is more than-0.1 MPa), wherein the acid solution is wastewater generated in the preparation of phosphoric acid by an industrial wet method or a phosphoric acid solution with the concentration of more than 5 mol/L.
5. The process for producing moisture-and phosphorus-resistant building gypsum board according to claim 1, wherein: and (3) soaking the gypsum board subjected to acid leaching for 2-3 hours in an alkaline solution under a negative pressure state (the pressure is more than-0.1 MPa), wherein the alkaline solution is saturated lime water or a sodium hydroxide solution with the concentration of more than 1mol/L, or other alkaline solutions with the pH of more than 13.
6. The process for producing moisture-and phosphorus-resistant building gypsum board according to claim 1, wherein: and (3) naturally airing the gypsum board subjected to alkaline leaching treatment, then performing high-temperature quick drying, and then performing accurate cutting to obtain the moisture-proof phosphorus building gypsum board with the standard size.
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| CN202110619186.9A CN113232124A (en) | 2021-06-03 | 2021-06-03 | Production process of moisture-proof phosphorus building gypsum board |
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| CN202110619186.9A CN113232124A (en) | 2021-06-03 | 2021-06-03 | Production process of moisture-proof phosphorus building gypsum board |
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