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Desulfurized gypsum gypsum plaster board with high chloride ion content and preparation method of desulfurized gypsum gypsum gypsum plaster board

A technology of paper-faced gypsum board and desulfurized gypsum, which is applied in the field of desulfurized gypsum paper-faced gypsum board with high chloride 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

[0004] This application provides a high chloride ion content desulfurized gypsum plasterboard and its preparation method, which can use high chloride ion content desulfurized gypsum as the raw material of the paper surface gypsum, and solve the problem of paper surface gypsum prepared from high chloride ion 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 gypsum plaster board with high chloride ion content and preparation method of desulfurized gypsum gypsum gypsum plaster board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The paper-faced gypsum board prepared in this example has a chloride ion content of 1385 mg / kg in the raw material desulfurized gypsum clinker.

[0043] The specific steps for preparing gypsum board are as follows:

[0044] Step 1. Pretreat the zeolite and activate it. The method is as follows: the zeolite is roasted in a horse boiling furnace at 300°C for 2 hours, the organic matter is removed, and cooled to room temperature; the zeolite is rinsed with deionized water 10 times, and the volume of deionized water used is not less than the volume of the zeolite 10 times higher than that, dried under vacuum at 45℃ to constant weight.

[0045] Step 2. Weigh 100 parts by weight of desulfurized gypsum clinker, 1.2 parts by weight of pretreated zeolite, and 0.06 parts by weight of medium-alkali glass fiber (glass fiber length is 9mm, fiber monofilament diameter is 10μm), mechanically stirred, and mixed evenly. Prepare a mixture.

[0046] Step 3: Weigh 60 parts by weight of water, 0.8...

Embodiment 2

[0053] The paper-faced gypsum board prepared in this example has a chloride ion content of 1864 mg / kg in the raw material desulfurized gypsum clinker.

[0054] The specific steps for preparing gypsum board are as follows:

[0055] Step 1. Pretreat the zeolite and activate it. The method is as follows: the zeolite is roasted in a horse boiling furnace at 300°C for 2 hours to remove organic matter and cooled to room temperature; the zeolite is rinsed with deionized water for 10 times, and the volume of deionized water used is not less than the volume of the zeolite 10 times higher than that, dried under vacuum at 45℃ to constant weight.

[0056] Step 2. Weigh 100 parts by weight of desulfurized gypsum clinker, 4.2 parts by weight of pretreated zeolite, and 0.18 parts by weight of alkali-free glass fiber (glass fiber length is 15mm, fiber monofilament diameter is 15μm), mechanically stirred, and mixed evenly. Prepare the mixture.

[0057] Step 3: Weigh 65 parts by weight of water, 0.5 p...

Embodiment 3

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

[0061] The specific steps for preparing gypsum board are as follows:

[0062] Step 1. Pretreat the zeolite and activate it. The method is as follows: the zeolite is roasted in a horse boiling furnace at 300°C for 2 hours to remove organic matter and cooled to room temperature; the zeolite is rinsed with deionized water for 10 times, and the volume of deionized water used is not less than the volume of the zeolite 10 times higher than that, dried under vacuum at 45℃ to constant weight.

[0063] Step 2. Weigh 100 parts by weight of desulfurized gypsum clinker, 6.8 parts by weight of pretreated zeolite, and 0.1 parts by weight of alkali-resistant glass fiber (glass fiber length is 12mm, fiber monofilament diameter is 12μm), mechanically stir, and mix evenly. Prepare a mixture.

[0064] Step 3: Weigh 72 parts by weight of water, 0.26 par...

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Abstract

The invention provides a desulfurized gypsum gypsum plaster board with high chloride ion content and a preparation method of the desulfurized gypsum plaster board. The gypsum plaster board is preparedfrom 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 fiber; 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 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, 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 problem 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 the 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 board, especially a kind of desulfurized gypsum paper-faced gypsum board with high chloride ion content and its preparation method. Background technique [0002] Desulfurized 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 desulfurized gypsum in my country is amazing. Desulfurized gypsum is widely used in building materials and other industries, which has promoted the further development of the country's environmentally friendly circular economy, and has also greatly reduced the amount of natural gypsum extracted and protected resources. If the desulfurized 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 plasterboard is...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B20/04
CPCC04B20/04C04B28/144C04B2111/0062C04B2201/20C04B2201/50C04B14/047C04B14/42C04B24/287C04B24/38C04B24/14
Inventor 尹东杰王鹏起简铭谭丹君
Owner BEIJING NEW BUILDING MATERIALS PLC
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