High-density gypsum fiberboard and production technique thereof

A gypsum fiber and production process technology, applied in the field of green building materials, can solve problems such as difficulty in forming the base material, difficulty in pressing the base material to remove water, etc.

Active Publication Date: 2014-09-03
JIANGSU XIANGLI ANTI STATIC DECORATION MATERIALS
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, when using the mixed process of α hemihydrate gypsum and β hemihydrate gypsum, the obvious sig

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

D10 D50 D90 α1 3％ 15％ 32μm 91μm 272μm α2 5％ 28％ 11μm 63μm 131μm α3 17％ 80％ 4.9μm 21μm 48μm α4 22％ 84％ 2.8μm 16μm 42μm

[0066] Table 1

[0067] In Table 1, α1, α2, α3, and α4 are high-strength alpha gypsum, <5μm means that the particle size is less than 5um, which means the percentage of the total number of particles, <32μm means that the particle size is less than 32um, which means the percentage of the total number of particles, D10 means less than Particles with a value of D10 account for 10% of the total number of particles, D50 means that particles with a value smaller than D50 and larger than D50 account for 50% of the total number of particles, and D90 means that particles with a value smaller than D90 account for 90% of the total number of particles.

[0068] <5μm

<32μm

D10 D50 D90 β1 2.8％ 16％ 3.2um 13.5μm 152μm β2 5.2％ 47％ 13.8μm 36μm 78μm β3 ...

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Abstract

The invention discloses a high-density gypsum fiberboard which is prepared from a gelating material, a filling material, recovered waste newspaper, and reinforcing fiber prepared from packaging materials, wherein the gelating material is composed of alpha-semi-hydrated gypsum, beta-semi-hydrated gypsum and cement; and the filling material comprises calcium carbonate particles and inorganic perlite. The invention also discloses a production technique of the high-density gypsum fiberboard, which comprises the following steps: (1) mixing; (2) automatically feeding the mixture into a mold frame; (3) carrying out press molding; (4) stripping; and (5) carrying out multilayer drying tunnel accelerated curing and drying. The technique is mainly characterized in control on mixing raw materials with different particle sizes and modification on the equipment and draining technique; and the gypsum fiberboard prepared by the new formula materials and new technique has higher strength than simply using high-strength alpha-semi-hydrated gypsum, and the cost is obviously lowered.

Description

technical field [0001] The invention relates to a high-density gypsum fiber plate and a production process, and relates to the field of green building materials. Background technique [0002] High-density gypsum fiber panels are used in access floor panels. Due to their excellent fire resistance, high strength, and comfortable foot feel, they have developed rapidly in access floor panels and have basically replaced particleboard substrates. At the same time, they have also replaced some cement steel panels. The raw material for the preparation of high-density gypsum fiber base is mainly hemihydrate gypsum, and hemihydrate gypsum is mainly divided into alpha hemihydrate gypsum and beta hemihydrate gypsum. Alpha hemihydrate gypsum is made of dense short columnar hemihydrate gypsum crystals through autoclave method, hydrothermal method and other different processes, with small specific volume and high strength after gelation, but its production equipment investment is large and...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/24
CPCY02W30/91
Inventor 孙向东
Owner JIANGSU XIANGLI ANTI STATIC DECORATION MATERIALS
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