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Desulfurized gypsum plaster board with high magnesium ion content and preparation method thereof

A technology for paper-faced gypsum board and desulfurized gypsum, which is applied in the field of desulfurized gypsum paper-faced gypsum board with high magnesium ion content and its preparation, can solve the problems of dehydration and poor adhesion, and achieve good adhesion 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 magnesium ion content desulfurized gypsum plasterboard and its preparation method, which can use high magnesium ion content desulfurized gypsum as the raw material of the paper surface gypsum board, and solve the problem of paper surface gypsum prepared from high magnesium ion content desulfurized gypsum as raw material. Due to the technical problems of board dehydration and poor adhesion, the paper-faced gypsum board 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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  • Desulfurized gypsum plaster board with high magnesium ion content and preparation method thereof
  • Desulfurized gypsum plaster board with high magnesium ion content and preparation method thereof
  • Desulfurized gypsum plaster board with high magnesium ion content and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0044] For the gypsum board prepared in this embodiment, the content of water-soluble magnesium ions in the raw material desulfurized gypsum clinker is 0.19wt.%.

[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, weighing 100 parts by weight of desulfurized gypsum clinker, 1.05 parts by weight of pretreated zeolite, 0.06 parts by weight of medium-alkali glass fiber (glass fiber length is 9 mm, fiber monofilament diameter is 10 μm), mechanically stirred, and mixed uniformly, A mixture is prepared.

[0048] Step 3: Weigh 60 parts by w...

Embodiment 2

[0054] The content of water-soluble magnesium ions in the raw material desulfurized gypsum clinker of the paper-faced gypsum board prepared in this example is 0.86wt.%.

[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, weighing 100 parts by weight of desulfurized gypsum clinker, 4.10 parts by weight of pretreated zeolite, 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), mechanically stirred, and mixed uniformly. A mixture is prepared.

[00...

Embodiment 3

[0061] The paper-faced gypsum board prepared in this embodiment has a water-soluble magnesium ion content of 1.56 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, 6.7 parts by weight of pretreated zeolite, 0.1 part by weight of alkali-resistant glass fiber (the length of the glass fiber is 12 mm, and the diameter of the fiber monofilament is 12 μm), mechanically stir, and mix uniformly. A mixture is prepared.

[0065] St...

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Abstract

The invention provides a desulfurized gypsum plaster board with high magnesium ion content and a preparation method thereof. The 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, glass fiber 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 prepared bytaking high-magnesium 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 a paper-faced gypsum board, especially a desulfurized gypsum paper-faced gypsum board with high magnesium ion content and a preparation method thereof. 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 prepare...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/144C04B2201/20C04B2201/50C04B14/047C04B14/42C04B2103/22C04B24/38
Inventor 尹东杰简铭谭丹君武发德王莹何亮
Owner BEIJING NEW BUILDING MATERIALS PLC
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