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Preparation method of paper-surface gypsum board

A paper-faced gypsum board and gypsum clinker technology, applied in the field of paper-faced gypsum board preparation, can solve the problems of limited bonding performance of cover paper and unguaranteed bonding quality, so as to improve the bonding quality of boards and reduce the Dependent, high-return effects

Inactive Publication Date: 2015-10-14
BEIJING NEW BUILDING MATERIALS PLC
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Under the traditional production process formula, the bonding performance of the protective paper is severely restricted by the drying system of the board, and the bonding quality cannot be guaranteed

Method used

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  • Preparation method of paper-surface gypsum board
  • Preparation method of paper-surface gypsum board
  • Preparation method of paper-surface gypsum board

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Embodiment Construction

[0023] The specific implementation of a resource-intensive high-performance gypsum board preparation method disclosed by the present invention will be described in detail below in conjunction with the accompanying drawings, which is not intended to limit the scope of the present invention.

[0024] 1. Raw material types and proportioning scheme:

[0025] (1) Types and functions of raw materials:

[0026] 1. Gypsum clinker: desulfurized gypsum is calcined in a hammer disperser, dispersed in the air under the action of the rotating hammer head, and all attached water and part of crystal water are removed to produce plaster powder with hemihydrate gypsum as the main component , Gypsum powder enters the ball mill for grinding and modification to obtain gypsum clinker. The gypsum clinker has the characteristics of hydration and hardening of cementitious materials.

[0027] 2. Water: necessary material for hydration of gypsum clinker.

[0028] 3. PGCS: Jianjie construction grade p...

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Abstract

The invention discloses a preparation method of a paper-surface gypsum board. The method comprises the following steps: after being metered, gypsum clinker and PGCS are fully mixed, and then the mixture enters a mixer; paper pulp, mixing cement and foam respectively enter the mixer; the above dry and wet materials are fully stirred in the mixer to prepare uniform slurry, the slurry is continuously poured between two layers of covering paper, and a wet gypsum board is prepared by extrusion molding; and the wet gypsum board undergoes solidification, cutting, drying, final trimming, edge banding, stacking and packaging so as to prepare the paper-surface gypsum board finished product. According to the invention, bonding quality and strength of the board are enhanced; raw materials can be saved, energy consumption is reduced, and production cost is decreased; and dependence of bonding quality of the covering paper on operation and drying system is reduced. The scheme of drying the paper-surface gypsum board by the use of waste heat from a power plant or a steel mill is feasible. Energy conservation and emission reduction as well as automatic disposal of industrial waste residues are realized. In addition, the aggregate resources conservation purpose of ''low energy, low pollution and high return'' is achieved.

Description

technical field [0001] The invention relates to a method for preparing a gypsum board, in particular to a method for preparing a paper-faced gypsum board. Background technique [0002] At present, the binder used by gypsum board manufacturers is mainly modified starch. During the heating and drying process of the board, the modified starch begins to gelatinize. After gelatinization, the modified starch is soluble in water and migrates to the protective surface as the water evaporates. The contact part between paper and gypsum core material produces bonding performance. The bonding performance of the protective paper depends on the viscosity and degree of gelatinization of the modified starch after gelatinization. [0003] The viscosity of starch after gelatinization depends on the type of starch. High viscosity affects the migration amount, and low viscosity affects the bonding performance and even causes excessive migration of starch to the outer layer of the protective pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/14
Inventor 唐大勇王波王慧刚郭蕴莉汪朋
Owner BEIJING NEW BUILDING MATERIALS PLC
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