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Production method of lightweight gypsum board

A gypsum board, lightweight technology, applied in the direction of clay preparation equipment, chemical instruments and methods, ceramic products, etc., can solve the problems such as troublesome gypsum board forming process, the edge of gypsum board cannot stand up, and affect the appearance quality of gypsum board, etc. Achieve the effect of high molding rate, increased strength, uniform and dense cell distribution

Inactive Publication Date: 2020-03-17
CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual production, it is found that when the bulk density of the gypsum slurry is reduced to a certain level, it will bring troubles to the molding process of the gypsum board: when the foam on the surface of the gypsum board is too much, it is easy to cause the edge of the gypsum board to fail to stand up, seriously Affect the appearance quality of plasterboard

Method used

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  • Production method of lightweight gypsum board
  • Production method of lightweight gypsum board
  • Production method of lightweight gypsum board

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preparation example Construction

[0030] A preparation method for lightweight gypsum board, comprising:

[0031] 1S Prepare foaming agent, disperse into deionized water, stir and foam to obtain foam.

[0032] Specifically, step 1S includes:

[0033] 1.1S Prepare foaming agent, starch, and water reducing agent.

[0034] Preferably, the prepared starch is modified starch. Under this condition, the modified starch is added as a binder in the gypsum board preparation process. The molecular chain of the modified starch has migration activity, which plays a role in the drying process of the gypsum board. Protection of gypsum board, moisture-proof, etc.

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Abstract

The invention discloses a production method of a lightweight gypsum board. The method comprises the following steps: (1) preparing a foaming agent, dispersing the foaming agent into deionized water, and performing stirring and foaming to obtain a foam body; (2) preparing a gypsum clinker, dispersing the gypsum clinker in the foam body, and performing stirring at a stirring rate of 200-400 r / min for 30-90 s to obtain a gypsum slurry; (3) placing the gypsum slurry obtained in step (2) in an ultrasonic environment, performing ultrasonic treatment for 30-210 s, and carrying out solidification forming on the gypsum slurry to obtain a gypsum board, wherein the frequency of ultrasonic waves is set to be 20000-40000 Hz; and (4) drying the gypsum board obtained in step (3) until the reduction of the mass of the gypsum board is stopped in order to obtain the lightweight gypsum board.

Description

technical field [0001] The invention relates to the technical field of gypsum production, in particular to a method for manufacturing a high-strength lightweight foamed gypsum board. Background technique [0002] Gypsum board is a building decoration board made of building gypsum as the main raw material. As a new type of building material, gypsum board has light weight, fire prevention, sound insulation, heat preservation, heat insulation, good processability (planing, nailing, and sawing), convenient construction, disassembly and assembly, and increased use. Therefore, it is widely used in various industrial buildings and civil buildings, especially in high-rise buildings as interior wall materials and decoration materials. Such as: used for non-load-bearing walls in frame structures, indoor veneers, suspended ceilings, etc. With the deepening of my country's energy-saving policy, the reduction of capacity and consumption of gypsum board has become the development trend ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B28/14B28C5/38B28B1/087B28B1/50
CPCC04B28/14B28C5/388B28B1/087B28B1/50C04B2111/40C04B2201/50C04B2201/20C04B24/38C04B2103/302C04B2103/42C04B38/10C04B38/0067
Inventor 周梦文白宏成张羽飞冉秀云
Owner CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED