CN111605041A - Gypsum board production process capable of improving foam quantity stability - Google Patents
Gypsum board production process capable of improving foam quantity stability Download PDFInfo
- Publication number
- CN111605041A CN111605041A CN201910543124.7A CN201910543124A CN111605041A CN 111605041 A CN111605041 A CN 111605041A CN 201910543124 A CN201910543124 A CN 201910543124A CN 111605041 A CN111605041 A CN 111605041A
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- China
- Prior art keywords
- foaming agent
- gypsum board
- stock solution
- pump
- stability
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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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
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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
- 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
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
- B28B13/0235—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities the feed box being provided with agitating means, e.g. stirring vanes to avoid premature setting of the moulding material
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The application provides a gypsum board production process capable of improving foam quantity stability, which comprises the following steps: after primary dilution is carried out on the foaming agent stock solution, the foaming agent stock solution enters foaming equipment through a foaming agent pump and a mixing pump, wherein water is added at the mixing pump to carry out secondary dilution on the foaming agent stock solution; and after generating uniform and stable foam, the foam is input into a stirrer and mixed with dry and wet materials to obtain slurry, and the slurry is extruded to obtain the wet gypsum board. The gypsum board production process capable of improving the stability of the foam quantity, provided by the application, is used for diluting the foaming agent stock solution twice, so that the concentration of the foaming agent stock solution in the foaming process is reduced, the concentration fluctuation range of the foaming agent stock solution in a foaming agent pump and a mixing pump is reduced, the stability of the formed stockpile is greatly improved, the frequent adjustment of the mainline speed and the operation frequency of the foaming agent pump at an operation post is avoided, the reliability of the foaming work is improved, and the stability of gypsum board production and the automation degree of a production line are improved.
Description
Technical Field
The application relates to but is not limited to the field of gypsum board production, in particular to a gypsum board production process capable of improving foam quantity stability.
Background
On the existing gypsum board production line, a foaming agent stock solution is injected into foaming equipment for foaming, the flow of a foaming agent pump is 15kg/h, the flow of a mixing pump is 1t/h, but the fluctuation of the forming stockpile amount is frequent, the main line speed and the operation frequency of the foaming agent pump need to be frequently adjusted at a post, and the operation difficulty is high.
Disclosure of Invention
The application provides a gypsum board production process capable of improving stability of foam quantity, effectively improves stability of foaming foam, and improves production stability and automation degree of a production line.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
the application provides a gypsum board production process capable of improving foam quantity stability, which comprises the following steps:
after primary dilution is carried out on the foaming agent stock solution, the foaming agent stock solution enters foaming equipment through a foaming agent pump and a mixing pump, wherein water is added at the mixing pump to carry out secondary dilution on the foaming agent stock solution;
and after generating uniform and stable foam, the foam is input into a stirrer and mixed with dry and wet materials to obtain slurry, and the slurry is extruded to obtain the wet gypsum board.
Compared with the prior art, the method has the following beneficial effects:
the application provides a can improve gypsum board production technology of foam volume stability, through diluting the foamer stoste twice, the concentration of foamer stoste in the foaming process has been reduced, thereby foamer stoste concentration fluctuation range in foamer pump and the mixing pump has been reduced, the stability of shaping windrow has been improved greatly, the frequent adjustment thread speed of operating post and foamer pump operating frequency have been avoided, manpower and materials have been saved, the reliability of foaming work has been increased, and then the stability of gypsum board production and the degree of automation of production line have been improved. In addition, the gypsum board production process capable of improving the stability of the foam quantity is simple in operation steps, and is convenient for forming a flow process, so that the practicability of the production process is greatly improved.
Other features and advantages of the present application will be set forth in the description that follows.
Drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.
FIG. 1 is a flow chart of a gypsum board production process for improved foam stability according to an embodiment of the present application;
FIG. 2 is a flow chart illustrating an exemplary process for making gypsum board with improved foam stability according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. 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 existing production line adopts frequent adjustment of the main line speed and the operation frequency of the foaming agent pump to avoid the stability fluctuation of the formed stockpile, but the operation mode has higher difficulty and poor effect. Through many experiments, the thistle board shaping section mixes the thick liquids that dry and wet material and foaming foam mix and piles up back extrusion before the stripper plate, and the foam volume is the key influence factor of thick liquids deposit volume stability, and the stability that improves the foaming foam volume can effectual improvement production stability, avoids operating post frequently to adjust thread speed and foamer pump operating frequency, improves the degree of automation of production line.
The embodiment of the application provides a gypsum board production process capable of improving the stability of foam quantity, and as shown in fig. 1 and fig. 2, the production process comprises the following steps:
after primary dilution is carried out on the foaming agent stock solution, the foaming agent stock solution enters foaming equipment through a foaming agent pump and a mixing pump, wherein water is added at the mixing pump to carry out secondary dilution on the foaming agent stock solution;
and after generating uniform and stable foam, the foam is input into a stirrer and mixed with dry and wet materials to obtain slurry, and the slurry is extruded to obtain the wet gypsum board.
The application provides a can improve gypsum board production technology of foam volume stability, through diluting the foamer stoste twice, the concentration of foamer stoste in the foaming process has been reduced, thereby foamer stoste concentration fluctuation range in foamer pump and the mixing pump has been reduced, improve mixing pump outlet flow simultaneously, guarantee the whole required amount of foamer stoste, through reducing the foamer stoste concentration that passes through foamer pump and mixing pump, can effectively reduce the foamer stoste concentration fluctuation in foamer pump and mixing pump department, thereby improve the stability of shaping windrow greatly, the frequent adjustment thread speed of operation post and foamer pump operating frequency have been avoided, manpower and materials have been saved, the reliability of foaming work has been increased, and then the stability of gypsum board production and the degree of automation of production line have been improved. In addition, the gypsum board production process capable of improving the stability of the foam quantity is simple in operation steps, and is convenient for forming a flow process, so that the practicability of the production process is greatly improved.
The following is a detailed description of an exemplary overall operation:
step 1: step 101, respectively conveying paper fibers and water to a stirring tank through respective metering conveying equipment according to a preset proportion, stirring, and then inputting into a stirrer; 102, putting the calcined gypsum powder, the modified starch and the ultrafine tourmaline powder into a mixing reamer through respective metering and conveying equipment, fully mixing, and inputting into a stirrer; 103, diluting a foaming agent stock solution, then sending the diluted foaming agent stock solution into a foaming agent pump, enabling the diluted foaming agent stock solution to enter foaming equipment through a mixing pump, adding water into the mixing pump to perform secondary dilution on the foaming agent stock solution, improving the outlet flow of the mixing pump, and enabling the foaming equipment to generate uniform and stable foam and then inputting the uniform and stable foam 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 step 3: and (4) conveying the wet gypsum board through a forming belt, and cutting, drying and trimming to obtain a finished gypsum board after the wet gypsum board is solidified.
The following is an exemplary description of the various feedstocks:
calcined gypsum powder: the desulfurized gypsum is calcined to remove all attached water and part of crystal water to prepare powder taking semi-hydrated gypsum as a main component, and then the powder enters a ball mill for grinding and modification to prepare desulfurized calcined gypsum powder, and the desulfurized calcined gypsum powder generates strength after hydration and hardening and is used as a base material of a gypsum board core material.
Modified starch: the modified corn starch can be gelatinized in the gypsum board drying process, and the water is evaporated and transferred to the contact layer of the facing paper and the gypsum core material, so that the facing paper and the gypsum core material are firmly bonded together.
Foaming agent: the surfactant with sodium dodecyl sulfate as main component may be used to distribute air holes homogeneously inside the gypsum board core and reduce the unit area mass of the gypsum board. Water is added during the addition process to dilute the foaming agent.
Paper fiber: the fibrous products of the paper scraps and the like which are crushed and processed are added into the slurry, so that the gypsum board has better air permeability.
And (4) protecting the surface paper: the backing paper is common primary color paper, and the face paper can be selected according to the needs, such as: green face protecting paper is adopted. The cover paper provides over 70% strength to the gypsum plasterboard.
In an exemplary embodiment, the concentration of the foaming agent stock solution after the primary dilution is 45% to 55% of the original concentration, and the concentration of the foaming agent stock solution after the secondary dilution is greater than or equal to 0.7% and less than or equal to 0.8%.
The initial concentration of the foaming agent stock solution is 100 percent, the concentration of the foaming agent stock solution is reduced to 50 percent before the foaming agent pump is added, the concentration of the foaming agent stock solution entering foaming equipment is finally reduced to 0.7 to 0.8 percent after the foaming agent stock solution passes through the mixing pump, and multiple experiments show that the concentration of the foaming agent in the concentration range can greatly improve the stability of the formed stockpile and is convenient for realizing automatic control of forming. It should be noted that the concentrations described herein may be other concentrations, and may be adjusted according to actual production, and the present application is not limited thereto.
In an exemplary embodiment, the concentration of the foaming agent stock solution after the primary dilution is 45% or more and 55% or less, and the concentration of the foaming agent stock solution after the secondary dilution is 0.7% or more and 0.8% or less
In an exemplary embodiment, the outlet flow rate of the foaming agent pump is more than or equal to 13kg/h and less than or equal to 17kg/h, and the outlet flow rate of the mixing pump is more than or equal to 1.5t/h and less than or equal to 1.7 t/h.
In order to reduce the fluctuation range of the concentration of the foaming agent stock solution in the foaming agent pump and the mixing pump, the concentration of the foaming agent is secondarily diluted, meanwhile, in order to ensure that the supply quantity of the whole foaming agent stock solution is sufficient, the outlet flow of the foaming agent pump and the mixing pump is properly increased, the outlet flow of the foaming agent pump is 13kg/h to 17kg/h, and the outlet flow of the mixing pump is 1.5t/h to 1.7 t/h. It should be noted that the outlet flow rate described herein may be adjusted according to actual production, and the outlet flow rate may be adjusted to achieve the desired foaming effect, which is not limited in the present application.
In an exemplary embodiment, step 101, step 102, and step 103 are performed simultaneously in step 1; or, in step 1, step 101, step 102, and step 103 are executed according to a preset sequence.
Step 101, step 102, and step 103 may be performed simultaneously, or may be performed in a predetermined sequence, for example: the steps 101, 102 and 103 are performed in this order.
In an exemplary embodiment, the blowing agent pump and the mixing pump are both progressive cavity pumps.
The foaming agent pump and the mixing pump both adopt high-precision screw pumps to reduce the fluctuation of flow as much as possible, ensure the stability of the production process, simultaneously cooperate with the secondary dilution foaming agent stock solution (including increasing the outlet flow of the mixing pump) adopted in the application, further stabilize the concentration stability of the foaming agent stock solution in each production device, improve the stability of the molding stacking material, and finally improve the quality of the gypsum board finished product.
In the description of the present application, it should be noted that the term "plurality" refers to two or more, and the directions or positional relationships indicated by "upper", "lower", and the like are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the structures referred to have a specific direction, are constructed and operated in a specific direction, and thus, cannot be construed as limiting the present application.
The embodiments described herein are exemplary rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements that have been disclosed in this application may also be combined with any conventional features or elements to form unique aspects as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other aspects to form another unique aspect as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
Claims (7)
1. A gypsum board production process capable of improving foam stability, comprising: after primary dilution is carried out on the foaming agent stock solution, the foaming agent stock solution enters foaming equipment through a foaming agent pump and a mixing pump, wherein water is added at the mixing pump to carry out secondary dilution on the foaming agent stock solution;
and after generating uniform and stable foam, the foam is input into a stirrer and mixed with dry and wet materials to obtain slurry, and the slurry is extruded to obtain the wet gypsum board.
2. The process for producing gypsum board with improved foam stability of claim 1, wherein the concentration of the foaming agent stock solution after one dilution is 45% to 55% of the original concentration.
3. The process for producing gypsum board with improved foam stability of claim 2, wherein the concentration of the foaming agent stock solution after the secondary dilution is 0.7% to 0.8%.
4. The process for producing gypsum board with improved foam stability of claim 1, wherein the mixing pump outlet flow rate is increased by 50% to 70%.
5. The gypsum board production process capable of improving foam quantity stability according to claim 4, wherein the outlet flow rate of the mixing pump is 1.5t/h to 1.7 t/h.
6. The process for producing gypsum board with improved foam stability according to claim 1, wherein the outlet flow rate of the foaming agent pump is 13kg/h to 17 kg/h.
7. The process for producing gypsum board according to any one of claims 1 to 6, wherein the foaming agent pump and the mixing pump are screw pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543124.7A CN111605041A (en) | 2019-06-21 | 2019-06-21 | Gypsum board production process capable of improving foam quantity stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543124.7A CN111605041A (en) | 2019-06-21 | 2019-06-21 | Gypsum board production process capable of improving foam quantity stability |
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| CN111605041A true CN111605041A (en) | 2020-09-01 |
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| CN201910543124.7A Pending CN111605041A (en) | 2019-06-21 | 2019-06-21 | Gypsum board production process capable of improving foam quantity stability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113942120A (en) * | 2021-11-18 | 2022-01-18 | 北新集团建材股份有限公司 | Foaming and mixing system for desulfurized gypsum slurry |
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| CN1708463A (en) * | 2002-10-29 | 2005-12-14 | 吉野石膏株式会社 | Method for producing light gypsum board |
| CN103806555A (en) * | 2014-01-22 | 2014-05-21 | 许庆华 | Unfired gypsum foaming acoustical board |
| CN104973882A (en) * | 2015-06-25 | 2015-10-14 | 北新集团建材股份有限公司 | Preparation method of paper-surface gypsum board |
| WO2017058316A1 (en) * | 2015-10-01 | 2017-04-06 | United States Gypsum Company | Foam modifiers for cementitious slurries, methods, and products |
| CN107030856A (en) * | 2017-05-09 | 2017-08-11 | 宁波北新建材有限公司 | A kind of method for improving gypsum board manufacture foam stability |
| CN108484217A (en) * | 2018-04-24 | 2018-09-04 | 上海市地江建筑科技有限公司 | Cement foam foaming agent and preparation method thereof |
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2019
- 2019-06-21 CN CN201910543124.7A patent/CN111605041A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1708463A (en) * | 2002-10-29 | 2005-12-14 | 吉野石膏株式会社 | Method for producing light gypsum board |
| CN103806555A (en) * | 2014-01-22 | 2014-05-21 | 许庆华 | Unfired gypsum foaming acoustical board |
| CN104973882A (en) * | 2015-06-25 | 2015-10-14 | 北新集团建材股份有限公司 | Preparation method of paper-surface gypsum board |
| WO2017058316A1 (en) * | 2015-10-01 | 2017-04-06 | United States Gypsum Company | Foam modifiers for cementitious slurries, methods, and products |
| CN107030856A (en) * | 2017-05-09 | 2017-08-11 | 宁波北新建材有限公司 | A kind of method for improving gypsum board manufacture foam stability |
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| CN113942120A (en) * | 2021-11-18 | 2022-01-18 | 北新集团建材股份有限公司 | Foaming and mixing system for desulfurized gypsum slurry |
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