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High-sodium-ion-content desulfurized gypsum plaster board and method for improving bonding grade

A technology of gypsum board and desulfurized gypsum, which is applied in the field of desulfurized gypsum plaster board with high sodium ion content, can solve the problems of dehydration and poor adhesion of gypsum board, and achieve good bonding effect

Inactive Publication Date: 2020-09-01
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a high-sodium ion-content desulfurized gypsum plasterboard and a method for improving the bonding grade, which can use desulfurized gypsum with a high sodium-ion content as a raw material for the paper-faced gypsum board, and solves the problem of paper-faced gypsum prepared from high-sodium desulfurized gypsum as a raw material. Due to the technical problems of poor dehydration and adhesion of gypsum boards, the paper-faced gypsum boards prepared by the method of the present invention can be used under harsh test conditions without peeling off the board core and the protective paper, and the bonding effect is good

Method used

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  • High-sodium-ion-content desulfurized gypsum plaster board and method for improving bonding grade
  • High-sodium-ion-content desulfurized gypsum plaster board and method for improving bonding grade
  • High-sodium-ion-content desulfurized gypsum plaster board and method for improving bonding grade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] For the gypsum board prepared in this embodiment, the content of water-soluble sodium ions in the raw material desulfurized gypsum clinker is 0.09 wt.%.

[0045] Prepare the paper-faced gypsum board, the specific steps are as follows:

[0046] Step 1. Pretreat the zeolite and activate it. The method is as follows: the zeolite is roasted at 300° C. for 2 hours in a horse boil furnace, the organic matter is removed, and cooled to room temperature; the zeolite is rinsed 10 times with deionized water, and the volume of the deionized water used is not less than the volume of the zeolite 10 times, 45 ℃ vacuum drying to constant weight.

[0047] Step 2: Weigh 100 parts by weight of desulfurized gypsum clinker, 0.06 parts by weight of medium-alkali glass fiber (the length of glass fiber is 9 mm, and the diameter of fiber filament is 10 μm), stir mechanically, and mix evenly to prepare a mixture.

[0048] Step 3: Weigh 60 parts by weight of water, 1.25 parts by weight of pretre...

Embodiment 2

[0054] The paper-faced gypsum board prepared in this embodiment has a water-soluble sodium ion content of 0.12 wt.% in the raw material desulfurized gypsum clinker.

[0055] Prepare the paper-faced gypsum board, the specific steps are as follows:

[0056] Step 1. Pretreat the zeolite and activate it. The method is as follows: the zeolite is roasted at 300° C. for 2 hours in a horse boil furnace, the organic matter is removed, and cooled to room temperature; the zeolite is rinsed 10 times with deionized water, and the volume of the deionized water used is not less than the volume of the zeolite 10 times, 45 ℃ vacuum drying to constant weight.

[0057] Step 2: Weigh 100 parts by weight of desulfurized gypsum clinker, 0.18 parts by weight of non-alkali glass fiber (the length of the glass fiber is 15 mm, and the diameter of the fiber monofilament is 15 μm), stir mechanically, and mix evenly to prepare a mixture.

[0058] Step 3: Weigh 65 parts by weight of water, 4.2 parts by we...

Embodiment 3

[0061] The paper-faced gypsum board prepared in this embodiment has a water-soluble sodium ion content of 0.16 wt.% in the raw material desulfurized gypsum clinker.

[0062] Prepare the paper-faced gypsum board, the specific steps are as follows:

[0063] Step 1. Pretreat the zeolite and activate it. The method is as follows: the zeolite is roasted at 300° C. for 2 hours in a horse boil furnace, the organic matter is removed, and cooled to room temperature; the zeolite is rinsed 10 times with deionized water, and the volume of the deionized water used is not less than the volume of the zeolite 10 times, 45 ℃ vacuum drying to constant weight.

[0064] Step 2: Weigh 100 parts by weight of desulfurized gypsum clinker, 0.1 part by weight of alkali-resistant glass fiber (the length of glass fiber is 12 mm, and the diameter of fiber monofilament is 12 μm), stir mechanically, and mix evenly to prepare a mixture.

[0065] Step 3: Weigh 72 parts by weight of water, 6.8 parts by weight...

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Abstract

The invention provides a high-sodium-ion-content desulfurized gypsum plaster board and a method for improving a bonding grade. The plaster gypsum board is prepared from the following raw materials inparts by mass: 100 parts of desulfurized gypsum clinker; 60 to 75 parts of water; 0.5 to 10 parts of zeolite; 0.05 to 0.2 part of glass fibers; 0.2 to 1 part of retarder; and 0.2 to 1 part of starch.The preparation method comprises the following steps of: pretreating the zeolite and activating the zeolite; mixing the desulfurized gypsum clinker, glass fibers and treated zeolite to obtain a mixture; weighing the water, retarder and starch to prepare a mixed solution; uniformly mixing the mixture and the mixed solution to prepare gypsum slurry; and molding the gypsum slurry, performing solidifying, drying, laminating, edge sawing, edge sealing and packaging to obtain the gypsum plaster board. With the gypsum plaster board adopted, the technical problems that a gypsum plaster board preparedby taking high-sodium desulfurized gypsum clinker as a raw material is poor in dehydration property and cohesiveness can be solved, and under severe test conditions, the board core and surface protection paper of the gypsum plaster board are not stripped, so that the bonding effect of the gypsum plaster board is good.

Description

technical field [0001] This article relates to paper-faced gypsum boards, especially desulfurized gypsum paper-faced gypsum boards with high sodium ion content and methods for improving bonding grades. Background technique [0002] Desulfurization gypsum is the product of flue gas desulfurization in coal-fired power plants. With the promotion of flue gas desulfurization projects in coal-fired power plants, the annual output of desulfurization gypsum in my country is astonishing. Desulfurization gypsum is widely used in building materials and other industries, which not only promotes the further development of national environmental protection and circular economy, but also greatly reduces the amount of natural gypsum mining and protects resources. If desulfurization gypsum cannot be effectively treated and applied, it will not only waste resources, but also cause secondary pollution to the environment. [0003] At present, the technology of using desulfurized gypsum to prep...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B20/04C04B20/02C04B14/04
CPCC04B20/023C04B20/04C04B28/144C04B2111/0062C04B14/047C04B14/42C04B24/38C04B24/14C04B24/287
Inventor 尹东杰谭丹君王鹏起武发德简铭
Owner BEIJING NEW BUILDING MATERIALS PLC
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