Process for producing thistle board by using desulphurization gypsum and natural gypsum

A paper-faced gypsum board and natural gypsum technology, applied in the field of building decoration materials, can solve the problems of difficult to control dry powder conveying, metering, feeding performance, weak bonding between the board core and the cover paper, and unfavorable automatic production. The effect of good comprehensive utilization of resources, protection of natural minerals and the environment, and reduction of resource consumption

Inactive Publication Date: 2009-10-28
TAISHAN GYPSUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Compared with natural gypsum, desulfurized gypsum has less impurity content, smaller particle size, and stable composition. Because the free water content of its raw materials is between 10-15%, and its viscosity is strong, it will cause blockage during loading, lifting, and transportation. , not conducive to automated production
In addition, due to poor gradation, the particle distribution zone is far narrower than that of natural gypsum ground gypsum powd

Method used

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Embodiment Construction

[0019] The present invention is described in detail below in conjunction with embodiment:

[0020] The process includes three processes of milling, pulping and board making, and the specific process steps are as follows:

[0021] (1) Milling

[0022] 1. After the desulfurized gypsum and natural gypsum are crushed by a crusher to remove metal impurities, the desulfurized gypsum is dried in a tumble dryer with the temperature controlled at 100°C, and the drying ends when the free water content in the material is below 5%. Dried, natural gypsum goes into a mill to grind finely;

[0023] 2. The treated desulfurized gypsum and natural gypsum are weighed according to the weight ratio of 7:3 through an electronic belt scale, and then mixed evenly in the gypsum homogenization storehouse;

[0024] 3. The mixed material first enters the fluidized fluidized furnace and is continuously calcined at 200°C. When the crystal water drops to 6%, it enters the powder bin for cooling and aging ...

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Abstract

The invention discloses a process for producing a thistle board by using desulphurization gypsum and natural gypsum, which comprises three process steps of milling, pulping and board making. The method uses the desulphurization gypsum and the natural gypsum according to certain proportion, reduces energy consumption of a manufacturing technique of the natural gypsum, effectively adjusts the grain composition of building gypsum powder, reduces the resource consumption while ensuring the normal production and the product quality of the thistle board, protects natural minerals and the environment, and achieves better effect of comprehensive utilization of resources.

Description

technical field [0001] The invention relates to a process for producing paper-faced gypsum boards by using desulfurized gypsum and natural gypsum, and belongs to the field of building decoration materials. Background technique [0002] At present, most domestic gypsum building material enterprises use natural gypsum as the main raw material for production. Gypsum ore can be prepared in any particle size distribution according to needs during production. The production process of natural gypsum consumes a lot of energy, and it needs mineral processing, crushing, fine grinding, and calcination to obtain it. It is used as construction gypsum powder for plasterboard, and natural gypsum is a non-renewable mineral resource, and mining will inevitably cause environmental impact. [0003] Extensive use of gypsum ore has resulted in over-exploitation of mineral resources and damage to the natural environment. Coupled with the limited nature of natural gypsum resources, its price has ...

Claims

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Application Information

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IPC IPC(8): E04F13/077B28C1/04B28C7/04C04B11/00
CPCC04B41/4503C04B2111/00017C04B41/009C04B2111/0062C04B28/14C04B20/0048C04B24/38C04B38/10C04B2103/302
Inventor 贾同春曹志强任绪连孟兆远薛法珍刘颖
Owner TAISHAN GYPSUM CO LTD
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