Light water-resistant gypsum board, production method and production equipment thereof

Abstract

The embodiment of the invention provides a production method of a light water-resistant gypsum board. The method at least comprises the following steps: a) scattering and frying desulfurized gypsum toprepare mature gypsum powder; b) fully mixing fly ash and the mature gypsum powder, and carrying out grinding modification to obtain clinker; c) adding water, a foaming agent, paper pulp, modified starch, a coagulant, silicone oil and a silicone oil catalyst into the clinker, and fully stirring to obtain uniform slurry; d) continuously pouring the slurry between two layers of surface protection paper, and carrying out extrusion molding to obtain a wet gypsum board, and e) solidifying the wet gypsum board, cutting, drying, and carrying out edge sawing to obtain a finished gypsum board with a paper surface. The embodiment of the invention also provides the light water-resistant gypsum board obtained by the production method and production equipment for producing the gypsum board.

Description

technical field [0001] The application relates to the field of building materials, in particular to a lightweight water-resistant gypsum board and its production method and production equipment. Background technique [0002] The existing ordinary paper-faced gypsum board is widely used in houses, office buildings, hotels and other places due to its light weight, sound insulation, heat insulation, strong processing performance, and simple construction methods. However, due to the solubility of gypsum in water Larger, low softening coefficient, not suitable for applications in humid environments. [0003] At present, the traditional production process of water-resistant gypsum board is to inject silicone oil and other waterproofing agents into the foaming system, emulsify them, and then inject them into the mixer. This method is to control the water absorption rate, and the unit weight of 9.5mm products is generally controlled at 6.6kg / m 2 The above is to reduce the porosity ...

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional production process of water-resistant gypsum board is to inject silicone oil and other waterproofing agents into the foaming system, emulsify them, and then inject them into the mixer. This method is to control the water absorption rate, and the unit weight of 9.5mm products is generally controlled at 6.6kg / m 2 The above is to reduce the porosity of the board, but in the actual production process, the water absorption of the board is still not up to the standard. In addition, due to the defoaming effect of silicone oil and other waterproofing agents, the silicone oil is mixed unevenly in the foaming system, which leads to product foaming. Bubbles are unstable, and the production speed fluctuates greatly, which eventually leads to the substandard water absorption of the gypsum board

When the water absorption of the gypsum board does not meet the standard, the method adopted in the prior art is to increase the amount of silicone oil added, but when the actual amount of silicone oil is added to a certain amount, the water absorption of the gypsum board will not decrease significantly, and the water absorption is still as high as More than 18% (far higher than the 10% of the national standard), the increase in the amount of silicone oil will further lead to the instability of the slurry and reduce the quality of the product

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