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Method for producing gypsum plaster by using desulfurized gypsum

A technology of desulfurized gypsum and paper-faced gypsum, which is applied in the field of gypsum, and can solve problems affecting the appearance and service life of paper-faced gypsum boards, low strength, and high content of harmful components.

Inactive Publication Date: 2021-02-19
四川蓝鼎新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large-scale application of desulfurized gypsum in the paper class also brings new problems. Compared with natural gypsum, desulfurized gypsum has defects such as low taste, more impurities, and more harmful components. Therefore, the paper-faced gypsum board produced with desulfurized gypsum It has problems such as low strength and poor paper adhesion, which will affect the appearance and service life of the plasterboard.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The method for producing plaster of paper by utilizing desulfurized gypsum comprises the following steps:

[0020] Step S1: Calcining, grinding, cooling and storing the desulfurized gypsum;

[0021] Step S2: Take the cooled desulfurized gypsum and mix it with additives and water, put it into a mold and wait for it to solidify and form;

[0022] Step S3: after solidification and forming, connect with the protective paper through glue, solidify and form, and dry;

[0023] In step S1, the calcination temperature is 180° C., and the calcination time is such that the detected crystal water content is between 8% and 10%;

[0024] In step S2, additive comprises the konjac powder of 3 weight parts, the naphthalene series water reducing agent of 5 weight parts, the foaming agent of 1 weight part, the silane coupling agent of 2 weight parts; The weight ratio of additive, water, desulfurized gypsum is 10:60:110;

[0025] In step S3, the drying temperature is 220-250° C., and th...

Embodiment 2

[0027] The method for producing plaster of paper by utilizing desulfurized gypsum comprises the following steps:

[0028] Step S1: Calcining, grinding, cooling and storing the desulfurized gypsum;

[0029] Step S2: Take the cooled desulfurized gypsum and mix it with additives and water, put it into a mold and wait for it to solidify and form;

[0030] Step S3: after solidification and forming, connect with the protective paper through glue, solidify and form, and dry;

[0031] In step S1, the calcination temperature is 180° C., and the calcination time is such that the detected crystal water content is between 8% and 10%;

[0032] In step S2, additive comprises the konjaku powder of 8 weight parts, the naphthalene series water reducing agent of 10 weight parts, the foaming agent of 5 weight parts, the silane coupling agent of 6 weight parts; The weight ratio of additive, water, desulfurized gypsum is 10:60:110;

[0033] In step S3, the drying temperature is 220-250° C., and...

Embodiment 3

[0035] The method for producing plaster of paper by utilizing desulfurized gypsum comprises the following steps:

[0036] Step S1: Calcining, grinding, cooling and storing the desulfurized gypsum;

[0037] Step S2: Take the cooled desulfurized gypsum and mix it with additives and water, put it into a mold and wait for it to solidify and form;

[0038] Step S3: after solidification and forming, connect with the protective paper through glue, solidify and form, and dry;

[0039] In step S1, the calcination temperature is 180° C., and the calcination time is such that the detected crystal water content is between 8% and 10%;

[0040] In step S2, additive comprises the konjac powder of 5 weight parts, the water reducer of 7 weight parts, the foaming agent of 3 weight parts, the coupling agent of 4 weight parts; The weight ratio of additive, water, desulfurized gypsum is 10:60 :110;

[0041] In step S3, the drying temperature is 220-250° C., and the drying time is 30 minutes.

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Abstract

The invention discloses a method for producing gypsum plaster by using desulfurized gypsum. The method comprises the following steps of: S1, calcining, grinding, cooling and storing desulfurized gypsum; S2, taking the cooled desulfurized gypsum, mixing the cooled desulfurized gypsum with an additive and water, and then putting the mixture into a grinding tool to wait for solidification forming; and S3, after solidification forming, connecting the product with surface protection paper through glue, and carrying out solidification forming and drying treatment; In the step S1, the calcining temperature is 180 DEG C, and the calcining time is when the content of crystal water is detected to be 8-10%; In the step S2, the additive comprises 3-8 parts by weight of konjaku flour, 5-10 parts by weight of a water reducing agent, 1-5 parts by weight of a foaming agent and 2-6 parts by weight of a coupling agent, and the weight ratio of the additive to the water to the desulfurized gypsum is 10: 60: 110. In the step S3, the drying temperature is 220-250 DEG C, and the drying time is 30 min.

Description

technical field [0001] The invention relates to the technical field of gypsum, in particular to a method for producing paper gypsum by utilizing desulfurized gypsum. Background technique [0002] Coal-fired power generation has always been the main form of my country's power industry, and for a long period of time in the future, this power structure will not change. The waste gas produced by coal combustion containing harmful gases such as SO2 is an important factor causing environmental pollution . In order to adapt to the country's policy orientation for resource and environment sustainable power generation, the application of flue gas desulfurization technology in coal-fired power plants was born. At the same time, as a by-product of flue gas desulfurization - desulfurization gypsum, its output is increasing year by year. Therefore, as an important industrial by-product, the utilization and disposal of desulfurized gypsum has become an urgent problem to be solved in domes...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B24/00C04B24/42
CPCC04B24/00C04B24/42C04B28/144C04B2111/0062C04B2201/50C04B2103/302C04B2103/0068C04B22/002
Inventor 王森林曾景祥李富勇徐筠唐刚黄明忠曾中东
Owner 四川蓝鼎新材料有限公司
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