CN108726969B - Gypsum board using recycled resources and production method and production system thereof - Google Patents

Gypsum board using recycled resources and production method and production system thereof Download PDF

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Publication number
CN108726969B
CN108726969B CN201710269741.3A CN201710269741A CN108726969B CN 108726969 B CN108726969 B CN 108726969B CN 201710269741 A CN201710269741 A CN 201710269741A CN 108726969 B CN108726969 B CN 108726969B
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gypsum board
fly ash
water
parts
gypsum
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CN108726969A (en
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辛伟
王慧刚
唐大勇
冯亮
汪朋
张策
喻铁良
李德生
张洪旭
王海东
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Beijing New Building Material Group Co Ltd
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Beijing New Building Material Group Co Ltd
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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
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped 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
    • B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
    • 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
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • 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
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1269—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices for making cellular concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
    • B28C5/402—Methods
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a gypsum board using recycled resources, a production method and a production system thereof, wherein the method comprises the following steps: step 1: the calcined gypsum powder, the fly ash, the glass fiber and the modified starch enter a mixing reamer through respective metering and conveying equipment to be fully mixed and then are input into a stirrer; mixing a foaming agent and water according to a preset proportion, foaming by a foaming metering system, and then feeding into a stirrer; adding water into a stirrer; step 2, stirring by a stirrer to inject slurry between the upper layer of protective paper and the lower layer of protective paper; extruding by a former to obtain a wet gypsum board; and 3, conveying the wet gypsum board through a forming belt, cutting, drying and trimming after the wet gypsum board is solidified to obtain a finished gypsum board. The invention can effectively utilize the fly ash and reduce the production cost; meanwhile, the strength, the impact resistance and the caking property of the plate are all superior to the relevant requirements of national standards.

Description

Gypsum board using recycled resources and production method and production system thereof
Technical Field
The invention relates to the technical field of gypsum board production, in particular to a gypsum board using recycled resources and a production method and a production system thereof.
Background
The paper-surface gypsum board has the advantages of light weight, fire resistance, sound insulation, convenient construction, low price and the like, is widely used for indoor partition walls, suspended ceilings and the like, can adjust indoor humidity by the specific breathing performance, is suitable for living, and gradually becomes the first choice of indoor decoration materials.
With the development of economy and the progress of society, people's environmental protection concept deepens increasingly, and pay more attention to the reuse of waste resources. In the production of gypsum boards, how to utilize waste resources and reduce production cost at the same time is a technical problem which needs to be solved in the field.
Disclosure of Invention
In order to solve the technical problems, the invention provides a gypsum board using a recycled resource, and a production method and a production system thereof.
The invention provides a method for producing a gypsum board by using a recycled resource, which comprises the following steps:
step 1: step 101: the calcined gypsum powder, the fly ash, the glass fiber and the modified starch enter a mixing reamer through respective metering and conveying equipment to be fully mixed and then are input into a stirrer; step 102: the foaming agent passes through foaming agent metering equipment, water passes through water metering equipment, and the water is mixed according to a preset proportion and then enters a stirrer; step 103: adding water into a stirrer;
step 2, stirring by a stirrer to inject slurry between the upper layer of protective paper and the lower layer of protective paper; extruding by a former to obtain a wet gypsum board;
and 3, conveying the wet gypsum board through a forming belt, and cutting, drying and trimming after the wet gypsum board is solidified to obtain a finished gypsum board product.
The production method can also have the following characteristics:
step 101, step 102 and step 103 in step 1 are performed simultaneously, or step 101, step 102 and step 103 in step 1 are performed according to a preset sequence.
The production method can also have the following characteristics:
the weight of the gypsum board finished product is 100 parts, and the proportioning mode of the raw materials by mass part is as follows:
95-98 parts of calcined gypsum powder;
2-5 parts of fly ash by mass;
75-78 parts of water;
0.1-0.15 parts of foaming agent;
the weight of the modified starch is 0.4-0.5 part;
the glass fiber accounts for 0.1-0.12 part by mass.
The production method can also have the following characteristics:
in the step 102, the foaming agent accounts for 2-3% of the mixed liquid of the foaming agent and water.
The production method can also have the following characteristics:
the water in the step 103 accounts for 75-78% of the total water in the step 103 and the step 102.
The production method can also have the following characteristics:
the step 1 is also preceded by a method for obtaining calcined gypsum powder, which comprises: breaking the desulfurized gypsum by a breaker, collecting gypsum particles by an electronic dust collector, and grinding the gypsum particles by a grinder to obtain the calcined gypsum powder.
The production method can also have the following characteristics:
step 1 is preceded by a method of obtaining fly ash, comprising: collecting fly ash particles at a heat exchanger of a coal-fired combustion furnace by using an electronic dust collector, and grinding the fly ash particles by using a grinder to obtain the fly ash.
The production method can also have the following characteristics:
the modified starch is modified corn starch.
The invention provides a gypsum board using recycled resources, which is prepared from the following raw materials in parts by weight of 100 parts:
95-98 parts of calcined gypsum powder;
2-5 parts of fly ash by mass;
75-78 parts of water;
0.1-0.15 parts of foaming agent;
the weight of the modified starch is 0.4-0.5 part;
the glass fiber accounts for 0.1-0.12 part by mass.
The present invention provides a gypsum board production system using recycled resources, including:
the device comprises calcined gypsum powder metering and conveying equipment, fly ash metering and conveying equipment, glass fiber metering and conveying equipment, modified starch metering and conveying equipment and a mixing reamer, wherein the mixing reamer corresponds to the output end of the calcined gypsum powder metering and conveying equipment, the output end of the fly ash metering and conveying equipment, the output end of the glass fiber metering and conveying equipment and the output end of the modified starch metering and conveying equipment;
the foaming agent metering device comprises a foaming agent metering device, a water metering device and a stirrer, wherein the stirrer corresponds to the output end of the mixing reamer, the output end of the foaming agent metering device and the output end of the water metering device;
a former, a forming belt, a cutting machine, a drier and an edge sawing machine which are connected in sequence.
The invention can effectively utilize recoverable resources and reduce the production cost; meanwhile, the strength, the impact resistance and the caking property of the plate are all superior to the relevant requirements of national standards.
Drawings
FIG. 1 is a flow diagram of a method of making gypsum board using recycled resources in accordance with the present invention;
FIG. 2 is a block diagram of a gypsum board production system using recycled resources according to the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The fly ash is solid waste discharged by electric dust collection of a coal-fired fluidized bed furnace, and the waste fly ash occupies a large amount of land, flies over the air to pollute the air in windy days and enters underground to pollute underground water in rainy days, so that dual damage to ecology and environment is formed. Meanwhile, the fly ash is a renewable resource which can be developed and utilized, and the full research and application of the fly ash to the production of gypsum boards can solve the problems of land occupation and environment pollution of the fly ash, and can save a large amount of resources aiming at the problems and the urgent need of energy conservation and emission reduction in China. The invention combines the characteristics of the desulfurized gypsum raw material of the power plant and the technical requirements of the gypsum plaster boards, and innovatively researches a high-efficiency forming method and a formula of the gypsum plaster boards and a central automatic control system in the whole production process. The industrial fly ash is used as admixture to be fried and ground with the desulfurized gypsum to produce the light thistle board, so that the brittleness, density and production cost of the finished board are reduced, cracks are reduced, and the quality of the finished product is improved.
FIG. 1 is a flow chart of a method of producing gypsum board using recycled resources in the present invention. The production method of the gypsum board comprises the following steps:
step 1: step 101: the calcined gypsum powder, the fly ash, the glass fiber and the modified starch enter a mixing reamer through respective metering and conveying equipment to be fully mixed and then are input into a stirrer; step 102: the foaming agent passes through foaming agent metering equipment, water passes through water metering equipment, and the water is mixed according to a preset proportion and then enters a stirrer; step 103: adding water into a stirrer;
step 2, stirring by a stirrer to inject slurry between the upper layer of protective paper and the lower layer of protective paper; extruding by a former to obtain a wet gypsum board;
and 3, conveying the wet gypsum board through a forming belt, cutting, drying and trimming after the wet gypsum board is solidified to obtain a finished gypsum board.
In step 1, the three substeps of step 101, step 102 and step 103 may be performed simultaneously, or may be performed according to a preset sequence, and the preset sequence of step 101, step 102 and step 103 includes 6.
The gypsum board using the recycled resources in the method comprises the following components in percentage by weight: the weight of the finished gypsum board product is 100 parts, and the proportioning mode of the raw materials by mass part is as follows:
95-98 parts of calcined gypsum powder;
2-5 parts of fly ash by mass;
75-78 parts of water;
0.1-0.15 parts of foaming agent;
the weight of the modified starch is 0.4-0.5 part;
the glass fiber accounts for 0.1-0.12 part by mass.
In the step 102, the foaming agent accounts for 2-3% of the mixed liquid of the foaming agent and the water.
The water in the step 103 accounts for 75-78% of the total water in the step 103 and the step 102.
Step 1 is preceded by a method of obtaining a calcined gypsum powder, the method of obtaining a calcined gypsum powder comprising: and (3) smashing the desulfurized gypsum by a breaker, collecting gypsum particles by an electronic dust collector, and grinding the gypsum particles by a grinder to obtain calcined gypsum powder.
Step 1 is preceded by a method of obtaining fly ash, the method of obtaining fly ash comprising: collecting fly ash particles at a heat exchanger of the coal-fired combustion furnace by using an electronic dust collector, and grinding the fly ash particles by using a grinder to obtain the fly ash.
In the method, 95-98% of calcined gypsum powder and 2-5% of fly ash are mixed, ground and modified. The calcined gypsum powder is hydrated and hardened in water to form a gypsum body grid structure to generate strength and provide 30% of strength for the paper-surface gypsum board, the fly ash is a loose solid aggregate and contains oxides of elements such as silicon, iron, calcium, magnesium and the like, and fine particles consisting of trace elements and rare elements, and because the fly ash contains different components, less than 5-8% of the fly ash is mixed in different proportions and used for the production process of the gypsum board, the fly ash can play roles in fire prevention and heat preservation, has an adsorption effect, and the strength of the gypsum board is not obviously reduced. 2-5% of the fly ash is doped to replace desulfurized gypsum, so that the viscosity of slurry of a forming station is improved, and the workability of the slurry is improved.
The foaming agent can uniformly distribute air holes in the board core, and the mass of the gypsum board per unit area is reduced.
The modified starch may be used as a binder for core and facing paper in gypsum plasterboards. The modified starch used in the production of gypsum plasterboard is typically acid-modified corn starch. The starch migrates to the interface of the board core and the face-protecting paper along with the water vapor in the production process of the gypsum board, and the bonding effect is achieved. Therefore, the molecular weight, gelatinization temperature and viscosity of the modified starch all influence the binding performance of the modified starch.
The glass fiber has fire resistance and improves the strength and toughness of the plate core.
FIG. 2 is a block diagram of a gypsum board production system using recycled resources, the system comprising:
the device comprises calcined gypsum powder metering and conveying equipment, fly ash metering and conveying equipment, glass fiber metering and conveying equipment, modified starch metering and conveying equipment and a mixing reamer, wherein the mixing reamer corresponds to the output end of the calcined gypsum powder metering and conveying equipment, the output end of the fly ash metering and conveying equipment, the output end of the glass fiber metering and conveying equipment and the output end of the modified starch metering and conveying equipment;
the device comprises a foaming agent metering device, a water metering device and a stirrer corresponding to the output end of the mixing reamer, the output end of the foaming agent metering device and the output end of the water metering device;
a former, a forming belt, a cutting machine, a drier and an edge sawing machine which are connected in sequence.
The invention utilizes the fly ash waste and the desulfurized gypsum waste generated in the production process of a factory, achieves the aim of comprehensive utilization of resources, and realizes the vision of low carbon, energy saving and environmental protection of novel building materials. The unit area mass of the gypsum board is reduced, and the production cost is saved. Meanwhile, the gypsum plasterboard produced by adding the fly ash into the desulfurized gypsum has the following properties: the adhesive property meets the national standard requirement; the mass per unit area is 6.9-7.1 kg/square meter, which is far better than the national standard requirement that the mass per unit area is not more than 9.5 kg/square meter; the average value of transverse breaking load is 215N, the average value of longitudinal breaking load is 455N, and the strength is far higher than the national standard requirement; all other indexes are higher than the national standard requirements.
The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.
It is to be noted that, in this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that an article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.
The above embodiments are merely to illustrate the technical solutions of the present invention and not to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it should be understood that the present invention is to be covered by the appended claims.

Claims (5)

1. A method of producing gypsum board using recycled resources, comprising:
step 1: step 101: the calcined gypsum powder, the fly ash, the glass fiber and the modified starch enter a mixing reamer through respective metering and conveying equipment to be fully mixed and then are input into a stirrer; step 102: the foaming agent passes through foaming agent metering equipment, water passes through water metering equipment, and the water is mixed according to a preset proportion and then enters a stirrer; step 103: adding water into a stirrer;
step 2, stirring by a stirrer to inject slurry between the upper layer of protective paper and the lower layer of protective paper; extruding by a former to obtain a wet gypsum board;
step 3, conveying the wet gypsum board through a forming belt, and cutting, drying and edge sawing after the wet gypsum board is solidified to obtain a finished gypsum board;
the weight of the gypsum board finished product is 100 parts, and the proportioning mode of the raw materials by mass part is as follows:
95-98 parts of calcined gypsum powder;
2-5 parts of fly ash by mass;
75-78 parts of water;
0.1-0.15 parts of foaming agent;
the weight of the modified starch is 0.4-0.5 part;
the mass of the glass fiber is 0.1-0.12 part;
in the step 102, the foaming agent accounts for 2-3% of the mixed liquid of the foaming agent and water;
the water in the step 103 accounts for 75-78% of the total amount of the water in the step 103 and the water in the step 102;
the modified starch is modified corn starch.
2. The production method according to claim 1,
step 101, step 102 and step 103 in step 1 are performed simultaneously, or step 101, step 102 and step 103 in step 1 are performed according to a preset sequence.
3. The production method according to claim 1,
the step 1 is also preceded by a method for obtaining calcined gypsum powder, which comprises: breaking the desulfurized gypsum by a breaker, collecting gypsum particles by an electronic dust collector, and grinding the gypsum particles by a grinder to obtain the calcined gypsum powder.
4. The production method according to claim 1,
step 1 is preceded by a method of obtaining fly ash, comprising: collecting fly ash particles at a heat exchanger of a coal-fired combustion furnace by using an electronic dust collector, and grinding the fly ash particles by using a grinder to obtain the fly ash.
5. A gypsum board using a recycled resource, characterized in that,
the weight of the gypsum board is 100 parts, and the proportioning mode of the raw materials by mass part is as follows:
95-98 parts of calcined gypsum powder;
2-5 parts of fly ash by mass;
75-78 parts of water;
0.1-0.15 parts of foaming agent;
the weight of the modified starch is 0.4-0.5 part;
the glass fiber accounts for 0.1-0.12 part by mass.
CN201710269741.3A 2017-04-24 2017-04-24 Gypsum board using recycled resources and production method and production system thereof Active CN108726969B (en)

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Publication number Priority date Publication date Assignee Title
CN111187049A (en) * 2018-11-14 2020-05-22 北新建材（嘉兴）有限公司 Light water-resistant gypsum board and production method and production equipment thereof
CN111196709A (en) * 2018-11-19 2020-05-26 北新集团建材股份有限公司 Waterproof, fireproof, mildewproof and high-strength glass fiber felt gypsum board and preparation method thereof
CN110698116B (en) * 2019-10-22 2022-01-04 北新建材（嘉兴）有限公司 Production process of gypsum board with high nail-holding power
CN111761702B (en) * 2020-07-08 2022-01-21 安庆米锐智能科技有限公司 Hollow brick molding treatment equipment and molding treatment process

Citations (2)

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Publication number Priority date Publication date Assignee Title
CN104261863A (en) * 2014-09-17 2015-01-07 北新集团建材股份有限公司 Preparation method of lightweight water-resistant paperbacked gypsum board
CN105418044A (en) * 2014-09-16 2016-03-23 北新集团建材股份有限公司 Mildewproof thistle board and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105418044A (en) * 2014-09-16 2016-03-23 北新集团建材股份有限公司 Mildewproof thistle board and preparation method thereof
CN104261863A (en) * 2014-09-17 2015-01-07 北新集团建材股份有限公司 Preparation method of lightweight water-resistant paperbacked gypsum board

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