A method for separating and recycling waste GRG reinforced fiber gypsum board

Abstract

The present invention provides a method for separating and recycling waste GRG-reinforced fiber gypsum board, comprising the following steps: S1, pre-sorting raw materials; S2, crushing with a roller press; S3, iron removal with an iron remover; S4, impurity removal with a water washer; S5, dehydration with a dewatering screen; S6, drying with a dryer; S7, secondary crushing with a hammer crusher; S8, preliminary separation of fibers and gypsum; S9, calcination; S10, grinding with a grinder; S11, particle size selection with a powder selector; and S12, processing into industrial gypsum products. The present invention recycles waste GRG-reinforced fiber gypsum board resources while simultaneously separating out harmful glass fiber materials. After disposal, the waste is essentially converted into harmless raw materials suitable for reproduction, avoiding significant resource waste and adverse environmental impacts.

Description

Technical Field

[0001] The present invention relates to the field of construction and decoration solid waste disposal, and in particular to a method for separating and recycling waste GRG reinforced fiber gypsum boards. Background Art

[0002] In the fields of construction and decoration, GRG-reinforced fiber gypsum board has attracted widespread attention in recent years. GRG-reinforced fiber gypsum board is a composite material composed of gypsum and glass fiber reinforcement. Made from a mixture of high-strength glass fibers and gypsum, it offers high durability and impact resistance. GRG-reinforced fiber gypsum board is typically molded, and pigments can be added during the production process to create a variety of colors and textures. Glass fiber is an inorganic, non-metallic material made from a variety of minerals through a complex manufacturing process. It exhibits excellent insulation, heat resistance, and corrosion resistance, and is widely used in modern decoration.

[0003] A single fiberglass filament has a diameter of only a few to twenty microns, equivalent to one-fifth to one-twentieth of a human hair. Each fiber bundle is composed of hundreds or even thousands of filaments. Such fine "threads" can cause stinging and itching when they penetrate the skin. Inhaling the tiny glass fibers can damage lung tissue, affecting normal breathing.

[0004] However, there is no comprehensive treatment method for waste GRG-reinforced fiber gypsum products, either domestically or internationally. They are typically dumped, landfilled, or sent to solid waste disposal systems as general solid waste. Landfill disposal significantly impacts the environment and wastes significant resources. When treated as general solid waste, the glass fibers released during the process can pose a significant health risk to operators. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a method for separating and recycling waste GRG reinforced fiber gypsum boards.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a method for separating and recycling waste GRG reinforced fiber gypsum boards, comprising the following steps:

[0007] S1, raw materials pre-sorting;

[0008] The raw materials are pre-sorted in the yard, and the raw materials with a size larger than the feeding port of the roller press are sorted out and placed according to the material category; the roller press is the crushing equipment used in the next step;

[0009] The raw materials are waste GRG reinforced fiber gypsum board waste after construction and renovation demolition, including: wood, iron frame, bricks, plastic, fiberglass gypsum board, screws, and paper;

[0010] The pre-sorting includes manual sorting and mechanical sorting.

[0011] S2, roller press crushing;

[0012] The pre-sorted raw materials are fed into a roller press for crushing to obtain block materials with a particle size of 33-37 mm. The fiberglass gypsum board is crushed into block gypsum board, and the tough materials in the fiberglass gypsum board remain in their original shape and are separated from the gypsum board. The tough materials include wood, paper, screws, and iron frames.

[0013] S3, iron removal by iron remover;

[0014] The bulk material is transported to the bottom of the iron remover, which is equipped with a magnet with a magnetic field strength greater than 700Gs. The iron remover attracts and separates the scrap iron, including screws and iron frames. The separated scrap iron is recycled or sent to a recycling company for recycling;

[0015] The distance between the iron remover and the upper surface of the bulk material is set between 150 and 300 mm to ensure that the iron remover can effectively attract and separate the scrap iron without being too close to the material surface to cause other problems.

[0016] S4, water washing machine to remove impurities;

[0017] The iron-removed bulk material is sent to a washing machine to separate impurities, including wood and paper;

[0018] It includes the following sub-steps:

[0019] S41. Salvage the wood and paper;

[0020] The density of wood and paper is lower than that of water, so they float on the water surface. The wood and paper are salvaged and subsequently processed into RDF combustible renewable energy fuel rods;

[0021] S42, waste liquid treatment;

[0022] The waste liquid is pumped into the sedimentation tank by a centrifugal pump, and precipitation liquid is added to promote the precipitation of solid waste in the waste liquid; then the upper clear liquid is discharged, and the lower liquid containing sediment is processed by the filter press, and the sediment is pressed into a mud cake;

[0023] S43, obtaining bottom sediment material;

[0024] Gypsum and fiberglass are denser than water and settle at the bottom of the washing machine tank.

[0025] S5, dehydration screen dehydration;

[0026] The sediment at the bottom is sent to the dewatering screen to remove some of the water. The gypsum is dehydrated by the centrifugal force of the dewatering screen, and the crystal water is not affected. The glass fiber is processed by the dewatering screen to remove most of the water.

[0027] By treating gypsum and fiberglass with dewatering screens, especially by reducing the surface moisture content of these materials, the subsequent processing steps can be more efficient. Due to the reduced surface moisture content, the subsequent drying process will be more efficient. In this case, less water needs to be removed during the drying process, thus reducing energy and time costs, improving production efficiency and cost-effectiveness.

[0028] S6, drying in dryer;

[0029] The dryer is used to heat the dehydrated material with hot air to thoroughly dry the fibers and remove all moisture.

[0030] Furthermore, the hot air temperature and treatment time during drying are controlled to ensure that the drying process can effectively remove moisture without causing adverse effects such as over-drying or heat damage.

[0031] Furthermore, the drying temperature does not exceed the dehydration temperature of the gypsum crystal water; above this temperature, the gypsum may lose the crystal water, affecting its physical properties.

[0032] Different materials have different affinities for water. By controlling the conditions of hot air drying, the removal of surface moisture can produce a significant difference in the physical properties of the materials, which is conducive to subsequent fine separation. Removing the surface moisture of gypsum by drying and reducing the moisture content of gypsum can help improve crushing efficiency, because materials with low moisture content are generally easier to handle and crush. In addition, controlling the moisture content can reduce the adhesion between materials, thereby reducing the risk of blockage in subsequent processing, helping to maintain the normal operation of equipment and improve production efficiency.

[0033] S7, hammer crusher secondary crushing;

[0034] The dried material is fed into a hammer crusher, where the hammer plates are spirally arranged, and the repeated action of the hammer plates breaks the large gypsum blocks into small gypsum particles.

[0035] The crushed material contains dry fibers and gypsum containing crystal water, which have different specific gravities;

[0036] A screen is provided below the hammer crusher to control the particle size of the material after secondary crushing.

[0037] The large-particle gypsum blocks are broken into small-size gypsum particles, which improves the efficiency of subsequent grinding equipment.

[0038] In addition, the hammer crusher generates wind pressure through hammering and rotation during the crushing process, which can help separate the fibers and gypsum particles. The high-speed rotation and the action of the hammer plate destroy the connection between the fibers and gypsum, thereby achieving their separation, which helps to improve the purity of the gypsum and further processing.

[0039] S8, preliminarily separating the fibers and the gypsum material;

[0040] The crushed material is conveyed to a negative pressure air separator, which is a device that separates materials of different densities or properties by wind. By adjusting the wind pressure of the negative pressure air separator, the dry fibers and gypsum containing crystal water are initially separated.

[0041] Specifically, the fibers with a lighter specific gravity are sucked out by the wind, while the gypsum material containing crystallization water with a heavier specific gravity is difficult to be sucked away by the wind, thereby achieving the initial separation of the fibers and the gypsum to obtain the gypsum material containing crystallization water.

[0042] S9, calcination;

[0043] The gypsum material containing crystal water that has been initially separated is sent to the calcining furnace for calcination. During the calcination process, the gypsum material containing crystal water will lose its crystal water, causing the gypsum to undergo chemical changes and transform into hemihydrate gypsum or anhydrous gypsum. After calcination, the hardness of the gypsum decreases and it is easier to break, further improving the grinding efficiency and at the same time increasing the life of the grinding equipment.

[0044] Furthermore, in order to improve production efficiency, a rapid calcination method is adopted, that is, the calcination process is completed in a shorter time.

[0045] Furthermore, in order to prevent the calcined gypsum from being affected by moisture and thus reducing its quality at high temperature, a cooling and aging device is provided. The cooling and aging device rapidly cools the calcined gypsum and ages it during the cooling process to ensure the quality of the final product.

[0046] S10, grinding mill;

[0047] The calcined gypsum enters the grinding mill, which converts the gypsum from its calcined state into finer particles, ensuring that the particle size of the final product is within the specified range.

[0048] S11, powder separator for particle size selection;

[0049] The ground granular materials are sent to the powder classifier, which separates granular materials of different particle sizes according to the particle size;

[0050] The powder classifier adopts a three-separation powder classifier to control the particle size of the collected particulate material within four ranges: below 40μm, 40-80μm, 80-160μm, 160μm and above; the raw materials are divided into different ranges according to the particle size, which provides convenience for the subsequent production process and can be graded more accurately to meet the requirements of the final product.

[0051] Among them, particle materials smaller than 40 μm and particle materials larger than 160 μm do not meet the grading requirements, while particle materials between 40-80 μm and particle materials between 80-160 μm meet the grading requirements.

[0052] S12, processed into gypsum industrial products;

[0053] Different additives are added according to different material particle sizes to produce different gypsum industrial products.

[0054] Specifically, the 40-80 μm particle material is fine gypsum powder, which is made into building gypsum products by adding plasticizers and thickeners; the 80-160 μm particle material is coarse gypsum powder, which is made into gypsum molds or gypsum crafts by adding hardeners, additives and water.

[0055] Furthermore, the particulate material smaller than 40 μm contains a large amount of glass fibers, and is collected separately and subjected to enhanced alkali treatment. By collecting the particulate material smaller than 40 μm separately and conducting enhanced alkali treatment, the glass fibers can be fully dissolved.

[0056] Furthermore, the fibers separated by the negative pressure air separator in step S8 are also collected separately and subjected to enhanced alkali treatment.

[0057] Furthermore, the particle materials larger than 160 μm are returned to the grinding mill for cyclic grinding.

[0058] Furthermore, steps S2 to S11 are all performed in a negative pressure dust collection system to collect glass fibers and dust generated during the production process that are harmful to human health.

[0059] Compared with the existing technology, the present invention has the following advantages: it realizes the resource recovery and harmless treatment of waste GRG reinforced fiber gypsum board. After treatment, the waste GRG reinforced fiber gypsum board resources can be recycled and utilized, while the glass fiber materials that are harmful to the human body are separated. After treatment, the waste GRG reinforced fiber gypsum board is basically converted into harmless raw materials that can be reproduced, thus avoiding significant waste of resources and adverse impacts on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 This is a schematic diagram of the principle of Example 1 of the present invention; Implementation Method

[0061] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments. Example

[0062] like Figure 1 As shown, a method for separating and recycling waste GRG reinforced fiber gypsum boards includes the following steps:

[0063] S1, raw materials pre-sorting;

[0064] The raw materials are pre-sorted in the yard, and the raw materials with a size larger than the feeding port of the roller press are sorted out and placed according to the material category; the roller press is the crushing equipment used in the next step;

[0065] The raw materials are waste GRG reinforced fiber gypsum board waste after construction and renovation demolition, including: wood, iron frame, bricks, plastic, fiberglass gypsum board, screws, and paper;

[0066] The pre-sorting includes manual sorting and mechanical sorting.

[0067] S2, roller press crushing;

[0068] The pre-sorted raw materials are fed into a roller press for crushing to obtain block materials with a particle size of 33-37 mm. The fiberglass gypsum board is crushed into block gypsum board, and the tough materials in the fiberglass gypsum board remain in their original shape and are separated from the gypsum board. The tough materials include wood, paper, screws, and iron frames.

[0069] When the present invention is specifically implemented, the roller press is driven by electricity or hydraulics.

[0070] In a specific embodiment of the present invention, when the material passes through the roller press, the fiberglass gypsum board is squeezed into small pieces due to its hard and brittle material, with a typical particle size of about 35 mm. Other materials such as wooden frames and paper surfaces remain in their original shape due to their toughness and are separated from the gypsum.

[0071] S3, iron removal by iron remover;

[0072] The bulk material is transported to the bottom of the iron remover, which is equipped with a magnet with a magnetic field strength greater than 700Gs. The iron remover attracts and separates the scrap iron, including screws and iron frames. The separated scrap iron is recycled or sent to a recycling company for recycling;

[0073] The distance between the iron remover and the upper surface of the bulk material is set between 150 and 300 mm to ensure that the iron remover can effectively attract and separate the scrap iron without being too close to the material surface to cause other problems.

[0074] S4, water washing machine to remove impurities;

[0075] The iron-removed bulk material is sent to a washing machine to separate impurities, including wood and paper;

[0076] It includes the following sub-steps:

[0077] S41. Salvage the wood and paper;

[0078] The density of wood and paper is lower than that of water, so they float on the water surface. The wood and paper are salvaged and subsequently processed into RDF combustible renewable energy fuel rods;

[0079] S42, waste liquid treatment;

[0080] The waste liquid is pumped into the sedimentation tank by a centrifugal pump, and precipitation liquid is added to promote the precipitation of solid waste in the waste liquid; then the upper clear liquid is discharged, and the lower liquid containing sediment is processed by the filter press, and the sediment is pressed into a mud cake;

[0081] S43, obtaining bottom sediment material;

[0082] Gypsum and fiberglass are denser than water and settle at the bottom of the washing machine tank.

[0083] In the specific implementation of the present invention, the water washing machine adopts a spiral form.

[0084] S5, dehydration screen dehydration;

[0085] The sediment at the bottom is sent to the dewatering screen to remove some of the water. The gypsum is dehydrated by the centrifugal force of the dewatering screen, and the crystal water is not affected. The glass fiber is processed by the dewatering screen to remove most of the water.

[0086] By treating gypsum and fiberglass with dewatering screens, especially by reducing the surface moisture content of these materials, the subsequent processing steps can be more efficient. Due to the reduced surface moisture content, the subsequent drying process will be more efficient. In this case, less water needs to be removed during the drying process, thus reducing energy and time costs, improving production efficiency and cost-effectiveness.

[0087] S6, drying in dryer;

[0088] The dryer is used to heat the dehydrated material with hot air to thoroughly dry the fibers and remove all moisture.

[0089] Furthermore, the hot air temperature and treatment time during drying are controlled to ensure that the drying process can effectively remove moisture without causing adverse effects such as over-drying or heat damage.

[0090] Furthermore, the drying temperature does not exceed the dehydration temperature of the gypsum crystal water; above this temperature, the gypsum may lose the crystal water, affecting its physical properties.

[0091] Different materials have different affinities for water. By controlling the conditions of hot air drying, the removal of surface moisture can produce a significant difference in the physical properties of the materials, which is conducive to subsequent fine separation. Removing the surface moisture of gypsum by drying and reducing the moisture content of gypsum can help improve crushing efficiency, because materials with low moisture content are generally easier to handle and crush. In addition, controlling the moisture content can reduce the adhesion between materials, thereby reducing the risk of blockage in subsequent processing, helping to maintain the normal operation of equipment and improve production efficiency.

[0092] S7, hammer crusher secondary crushing;

[0093] The dried material is fed into a hammer crusher, where the hammer plates are spirally arranged, and the repeated action of the hammer plates breaks the large gypsum blocks into small gypsum particles.

[0094] The crushed material contains dry fibers and gypsum containing crystal water, which have different specific gravities;

[0095] A screen is provided below the hammer crusher. In a specific embodiment of the present invention, the aperture of the screen is 5 mm, ensuring that the particle size of the material after secondary crushing is controlled below 5 mm.

[0096] The large-particle gypsum blocks are broken into small-size gypsum particles, which improves the efficiency of subsequent grinding equipment.

[0097] In addition, the hammer crusher generates wind pressure through hammering and rotation during the crushing process, which can help separate the fibers and gypsum particles. The high-speed rotation and the action of the hammer plate destroy the connection between the fibers and gypsum, thereby achieving their separation, which helps to improve the purity of the gypsum and further processing.

[0098] S8, preliminarily separating the fibers and the gypsum material;

[0099] The crushed material is conveyed to a negative pressure air separator, which is a device that separates materials of different densities or properties by wind. By adjusting the wind pressure of the negative pressure air separator, the dry fibers and gypsum containing crystal water are initially separated.

[0100] Specifically, the fibers with a lighter specific gravity are sucked out by the wind, while the gypsum material containing crystallization water with a heavier specific gravity is difficult to be sucked away by the wind, thereby achieving the initial separation of the fibers and the gypsum to obtain the gypsum material containing crystallization water.

[0101] S9, calcination;

[0102] The gypsum material containing crystal water that has been initially separated is sent to the calcining furnace for calcination. During the calcination process, the gypsum material containing crystal water will lose its crystal water, causing the gypsum to undergo chemical changes and transform into hemihydrate gypsum or anhydrous gypsum. After calcination, the hardness of the gypsum decreases and it is easier to break, further improving the grinding efficiency and at the same time increasing the life of the grinding equipment.

[0103] Furthermore, in order to improve production efficiency, a rapid calcination method is adopted, that is, the calcination process is completed in a shorter time.

[0104] Furthermore, in order to prevent the calcined gypsum from being affected by moisture and thus reducing its quality at high temperature, a cooling and aging device is provided. The cooling and aging device rapidly cools the calcined gypsum and ages it during the cooling process to ensure the quality of the final product.

[0105] S10, grinding mill;

[0106] The calcined gypsum enters the grinding mill, which converts the gypsum from its calcined state into finer particles.

[0107] During the specific implementation of the present invention, different types of grinding mills, such as ordinary steel mills or Raymond mills, can be selected and used in the grinding process according to specific production requirements and conditions to ensure that the particle size of the final product is within a specified range.

[0108] S11, powder separator for particle size selection;

[0109] The ground granular materials are sent to the powder classifier, which separates granular materials of different particle sizes according to the particle size;

[0110] The powder classifier adopts a three-separation powder classifier to control the particle size of the collected particulate material within four ranges: below 40μm, 40-80μm, 80-160μm, 160μm and above; the raw materials are divided into different ranges according to the particle size, which provides convenience for the subsequent production process and can be graded more accurately to meet the requirements of the final product.

[0111] Among them, particle materials smaller than 40 μm and particle materials larger than 160 μm do not meet the grading requirements, while particle materials between 40-80 μm and particle materials between 80-160 μm meet the grading requirements.

[0112] S12, processed into gypsum industrial products;

[0113] Different additives are added according to different material particle sizes to produce different gypsum industrial products.

[0114] Specifically, the 40-80 μm particle material is fine gypsum powder, which is made into building gypsum products by adding plasticizers and thickeners; the 80-160 μm particle material is coarse gypsum powder, which is made into gypsum molds or gypsum crafts by adding hardeners, additives and water.

[0115] Furthermore, the particulate material smaller than 40 μm contains a large amount of glass fibers, and is collected separately and subjected to enhanced alkali treatment. By collecting the particulate material smaller than 40 μm separately and conducting enhanced alkali treatment, the glass fibers can be fully dissolved.

[0116] Furthermore, the fibers separated by the negative pressure air separator in step S8 are also collected separately and subjected to enhanced alkali treatment.

[0117] Furthermore, the particle materials larger than 160 μm are returned to the grinding mill for cyclic grinding.

[0118] Furthermore, steps S2 to S11 are all performed in a negative pressure dust collection system to collect glass fibers and dust generated during the production process that are harmful to human health.

[0119] The present invention has been described with reference to the above embodiments. However, the above embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements that do not depart from the spirit and scope of the present invention are intended to be protected by the present invention.

Claims

1. A method for separating and recycling waste GRG reinforced fiber gypsum boards, characterized by: Including the following step: S1, raw materials pre-sorting; The raw materials are waste GRG reinforced fiber gypsum board waste after construction and renovation demolition, including: wood, iron frame, bricks, plastic, fiberglass gypsum board, screws, and paper; The pre-sorting includes manual sorting and mechanical sorting; Pre-sort the raw materials in the yard, sort out the raw materials that are larger than the feeding port of the roller press, and place them according to the material category; The roller press is the crushing equipment used in the next step; S2, roller press crushing; The pre-sorted raw materials are fed into a roller press for crushing to obtain bulk materials with a particle size of 33-37 mm; The fiberglass gypsum board is crushed into blocky gypsum boards, and the tough material in the fiberglass gypsum board remains in its original shape and is separated from the gypsum board; The said flexible materials include wood, paper, screws, and iron frames; S3, iron removal by iron remover; The bulk material is transported to the bottom of the iron remover, which is equipped with a magnet with a magnetic field strength greater than 700Gs. The iron remover attracts and separates the scrap iron, including screws and iron frames. The separated scrap iron is recycled or sent to a recycling company for recycling; The distance between the iron remover and the upper surface of the bulk material is set between 150 and 300 mm; S4, water washing machine to remove impurities; The iron-removed bulk material is sent to a washing machine to separate impurities, including wood and paper; S5, dehydration screen dehydration; The sediment at the bottom is sent to the dewatering screen to remove some of the water. The gypsum is dehydrated by the centrifugal force of the dewatering screen, and the crystal water is not affected. The glass fiber is processed by the dewatering screen to remove most of the water. S6, drying in dryer; Use a dryer to heat the dehydrated material with hot air to thoroughly dry the fiber and remove all moisture; S7, hammer crusher secondary crushing; The dried material is fed into a hammer crusher with a spiral arrangement of hammer plates. The repeated action of the hammer plates crushes the large gypsum blocks into small gypsum particles. The crushed material contains dry fibers and gypsum containing crystal water, which have different specific gravities; A screen is provided below the hammer crusher; S8, preliminarily separating the fibers and the gypsum material; The crushed material is transported to a negative pressure air separator, and the dry fibers and gypsum containing crystal water are initially separated by adjusting the air pressure of the negative pressure air separator; Specifically, the fibers with a lighter specific gravity are sucked out by the wind, while the gypsum material with a heavier specific gravity and containing crystal water is difficult to be sucked away by the wind, thereby achieving the initial separation of the fibers and gypsum, and obtaining the gypsum material containing crystal water; The negative pressure air separator is a device that separates materials of different densities or properties by wind power; S9, calcination; The gypsum material containing crystal water that has been initially separated is sent to a calcining furnace for calcination. During the calcination process, the gypsum material containing crystal water will lose its crystal water, causing the gypsum to undergo chemical changes and transform into hemihydrate gypsum or anhydrous gypsum. S10, grinding mill; The calcined gypsum enters the grinding mill, which converts the gypsum from its calcined state into finer particles; S11, powder separator for particle size selection; The ground granular materials are sent to the powder classifier, which separates granular materials of different particle sizes according to the particle size; The powder classifier adopts a three-separation powder classifier to control the particle size of the collected granular materials into four ranges: below 40μm, 40-80μm, 80-160μm, and 160μm and above; Among them, particle materials smaller than 40μm and particle materials larger than 160μm do not meet the gradation requirements, while particle materials between 40-80μm and particle materials between 80-160μm meet the gradation requirements; S12, processed into gypsum industrial products; Different additives are added according to different material particle sizes to produce different gypsum industrial products.

2. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: Step S4 specifically includes the following sub-steps: S41. Salvage the wood and paper; The density of wood and paper is lower than that of water, so they float on the water surface. The wood and paper are salvaged and subsequently processed into RDF combustible renewable energy fuel rods; S42, waste liquid treatment; The waste liquid is pumped into a sedimentation tank by a centrifugal pump, and precipitation liquid is added to promote the precipitation of solid waste in the waste liquid; The upper clear liquid is then discharged, and the lower liquid containing sediment is processed by a filter press, and the sediment is pressed into a mud cake; S43, obtaining bottom sediment material; Gypsum and fiberglass are denser than water and settle at the bottom of the washing machine tank.

3. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: In step S6, the hot air temperature and treatment time during drying are controlled so that the drying temperature does not exceed the dehydration temperature of the gypsum crystal water.

4. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: In step S9, a rapid calcination method is adopted, that is, the calcination process is completed in a shorter time.

5. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: In step S9, a cooling and aging device is provided to rapidly cool the calcined gypsum and perform aging during the cooling process.

6. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: In step S12, the 40-80 μm particle material is fine gypsum powder, which is made into building gypsum products by adding plasticizers and thickeners; the 80-160 μm particle material is coarse gypsum powder, which is made into gypsum molds or gypsum crafts by adding hardeners, additives and water.

7. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: Particles smaller than 40 μm contain a large amount of glass fibers and are collected separately and subjected to enhanced alkali treatment.

8. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: In step S8, the fibers separated by the negative pressure air separator are also collected separately and subjected to enhanced alkali treatment.

9. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: Particles larger than 160 μm are returned to the mill for cyclic grinding.

10. The method for separating and recycling waste GRG reinforced fiber gypsum boards according to claim 1, characterized in that: Steps S2 to S11 are all performed in a negative pressure dust collection system.

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