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High-chlorine desulfurized gypsum plaster board and method for improving bonding grade of high-chlorine desulfurized gypsum plaster board by activating zeolite

A technology of paper-faced gypsum board and desulfurization gypsum, applied in the field of high-chlorine desulfurization gypsum paper-faced gypsum board, can solve the problems of poor dehydration and poor adhesion of the paper-faced gypsum board, and achieve the effect of good bonding effect

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

AI Technical Summary

Problems solved by technology

[0004] This application provides a method for high-chloride desulfurized gypsum paper-faced gypsum board and activated zeolite to improve the bonding grade, which can use high-chloride ion-content desulfurized gypsum as a raw material for paper-faced gypsum board, and solves the problem of paper-faced gypsum board prepared with high-chloride 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-chlorine desulfurized gypsum plaster board and method for improving bonding grade of high-chlorine desulfurized gypsum plaster board by activating zeolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The gypsum board prepared in this example has a chloride ion content of 1389 mg / kg in the raw material desulfurized gypsum clinker.

[0044] Prepare the paper-faced gypsum board, the specific steps are as follows:

[0045] 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.

[0046] 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.

[0047] Step 3: Weigh 60 parts by weight of water, 1.2 parts by weight of pretreated zeolite, 0.8 part...

Embodiment 2

[0053] The paper surface gypsum board prepared in this embodiment has a chloride ion content of 1564 mg / kg in the raw material desulfurized gypsum clinker.

[0054] Prepare the paper-faced gypsum board, the specific steps are as follows:

[0055] 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.

[0056] 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.

[0057] Step 3: Weigh 65 parts by weight of water, 4.2 parts by weight of p...

Embodiment 3

[0060] The paper-faced gypsum board prepared in this embodiment has a chloride ion content of 4820 mg / kg in the raw material desulfurized gypsum clinker.

[0061] Prepare the paper-faced gypsum board, the specific steps are as follows:

[0062] 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.

[0063] 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.

[0064] Step 3: Weigh 72 parts by weight of water, 6.8 parts by weight of pretrea...

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Abstract

The invention provides a high-chlorine desulfurized gypsum plaster board and a method for improving the bonding grade of the high-chlorine desulfurized gypsum plaster board by activating zeolite. Thehigh-chlorine desulfurized gypsum plaster board is prepared from the following raw materials in parts 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 and glass fibers to obtain a mixture; weighing the water, retarder, starch and treated zeolite to prepare a mixed solution; uniformly mixing the mixture andthe mixed solution to prepare gypsum slurry; and molding the gypsum slurry, and 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 prepared by taking high-chlorine 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 high-chloride desulfurized gypsum paper-faced gypsum boards and a method for improving the bonding grade of activated zeolite. 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 gyps...

Claims

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Application Information

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