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Preparation method of gypsum board

A gypsum board and phosphogypsum technology, applied in the field of gypsum board preparation technology, can solve problems such as low flexural strength and low impact strength, poor ability to harmful gases, etc. Environmental protection function, improved compressive and tensile strength, no formaldehyde release effect

Inactive Publication Date: 2019-10-29
阜新泰山石膏建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flexural strength and impact strength of the gypsum board prepared by the prior art are low, and it is easy to deform, and the existing gypsum board has poor ability to absorb harmful gases such as formaldehyde, which cannot meet the market demand
Gypsum board does not have high requirements for environmental protection. It is a direction of research in building materials, but its application scope still needs to be developed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of gypsum board, concrete preparation steps are:

[0022] (1) Weigh 80-110 parts of desulfurized gypsum with a particle size of 70-80 mesh according to parts by weight and put them into the mixer, then add 200-250ml of hydrochloric acid solution, the hydrochloric acid solution is 0.6-0.8mol / L, and stir The speed is 150-280r / min, the stirring time is 20-30min, filter to obtain the filter residue, then put the filter residue into the hammer dryer, dry at 105-110℃ to constant weight, and then put it into the separator for separation , the rotation speed is 500-600r / min, take out the pure desulfurization gypsum in the upper layer, and calcinate to obtain oxidative desulfurization gypsum. The calcination temperature is 450-550°C, and the calcination time is 1-1.5h;

[0023] (2) Weigh 60-80 parts of phosphogypsum with a particle size of 70-80 mesh according to the number of parts by weight, put them in a hammer dryer, and dry them at 105-110°C to ...

Embodiment 2

[0027] A kind of preparation method of gypsum board, concrete preparation steps are:

[0028] (1) Weigh 80-110 parts of desulfurized gypsum with a particle size of 70-80 mesh according to parts by weight and put them into the mixer, then add 200-250ml of hydrochloric acid solution, the hydrochloric acid solution is 0.6-0.8mol / L, and stir The speed is 150-280r / min, the stirring time is 20-30min, filter to obtain the filter residue, then put the filter residue into the hammer dryer, dry at 105-110℃ to constant weight, and then put it into the separator for separation , the rotation speed is 500-600r / min, take out the pure desulfurization gypsum in the upper layer, and calcinate to obtain oxidative desulfurization gypsum. The calcination temperature is 450-550°C, and the calcination time is 1-1.5h;

[0029] (2) Weigh 60-80 parts of phosphogypsum with a particle size of 70-80 mesh according to the number of parts by weight, put them in a hammer dryer, and dry them at 105-110°C to ...

Embodiment 3

[0033] A kind of preparation method of gypsum board, concrete preparation steps are:

[0034](1) Weigh 80-110 parts of desulfurized gypsum with a particle size of 70-80 mesh according to parts by weight and put them into the mixer, then add 200-250ml of hydrochloric acid solution, the hydrochloric acid solution is 0.6-0.8mol / L, and stir The speed is 150-280r / min, the stirring time is 20-30min, filter to obtain the filter residue, then put the filter residue into the hammer dryer, dry at 105-110℃ to constant weight, and then put it into the separator for separation , the rotation speed is 500-600r / min, take out the pure desulfurization gypsum in the upper layer, and calcinate to obtain oxidative desulfurization gypsum. The calcination temperature is 450-550°C, and the calcination time is 1-1.5h;

[0035] (2) Weigh 60-80 parts of phosphogypsum with a particle size of 70-80 mesh according to the number of parts by weight, put them in a hammer dryer, and dry them at 105-110°C to c...

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Abstract

The invention belongs to the technical field of gypsum board preparation processes, and particularly relates to a preparation method of a gypsum board. The preparation method of the gypsum board comprises the following steps: a prepared oxidized desulfurization gypsum and a pretreated phosphogypsum are adopted and put into a ball mill for ball milling with a speed of 200-300 r / min and a ball milling time of 1.5-2.5 h, then transferred to a homogenization bin for homogenization, and then transferred to a disc mixer, then 15-18 parts of modified starch, 10-15 parts of modified glass fiber, 15-20parts of a coagulant, 2-8 parts of glass powder, 2-5 parts of a foaming agent, and 0.06-0.12 part of sodium dodecyl sulfate are added, and uniform mixing is carried out to obtain a mixed material; and the mixed material is poured into a flat forming machine pressed with a face protective paper, then a layer of the face protective paper is attached on the surface, hot pressing is carried out at conditions of a temperature of 180-210 DEG C and a pressure of 20-25 MPa, and solidification, cutting, drying and edge sawing are carried out to obtain the environment-friendly, lightweight and high-strength gypsum board. The preparation method of the gypsum board has the advantages of simple operation, no formaldehyde release in the process, safety and environmental protection, and good environmental protection function.

Description

technical field [0001] The invention belongs to the technical field of gypsum board preparation technology, and in particular relates to a preparation method of gypsum board. Background technique [0002] Gypsum board is the most commonly used building material, which has the advantages of light weight, sound insulation, heat insulation, strong processing performance, and simple construction methods, and is widely used in various buildings such as residences, office buildings, shops, hotels, and industrial plants. . The gypsum boards produced in my country mainly include gypsum boards: paper-faced gypsum boards, non-paper-faced gypsum boards, decorative gypsum boards, etc. But at present, gypsum board still has problems such as high water absorption rate, easy to fall off, poor water resistance and low strength. [0003] Among them, as a new type of building material, paper-faced gypsum board has the advantages of light weight, non-combustibility, earthquake resistance, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B38/10C04B20/02C04B11/26C04B14/42
CPCC04B11/26C04B11/264C04B20/023C04B28/144C04B2111/0062C04B2201/50C04B14/42C04B14/22C04B14/08C04B24/16C04B24/34C04B24/38C04B2103/12C04B38/10
Inventor 张彦修
Owner 阜新泰山石膏建材有限公司
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