阅读说明：本技术 一种石膏板促凝剂的制备方法及其制得的石膏板促凝剂 (Preparation method of gypsum board coagulant and gypsum board coagulant prepared by preparation method ) 是由 丛宇 李帆 戚婷婷 张赫 于 2019-04-26 设计创作，主要内容包括：本申请公开了一种石膏板促凝剂的制备方法,所述促凝剂的原料为生产石膏板时所产生的废料,将所述废料送入冲击式磨机粉碎后制得所述石膏板促凝剂。本申请还公开了利用所述的石膏板促凝剂的制备方法制备的石膏板促凝剂在石膏板中的用途。采用本申请提供的石膏板促凝剂的制备方法,其使用废料作为促凝剂的原料,实现了废料的循环利用,不仅节约成本,为工厂带来效益,还符合绿色环保的要求；利用冲击式磨机制备的石膏板促凝剂的容重以及粒径分布更小,比表面积更大,使得促凝剂具有更好的促凝效果,以满足生产需要。(The application discloses a preparation method of gypsum board coagulant, wherein the raw material of the coagulant is waste material generated in the production of gypsum boards, and the waste material is fed into an impact mill to be crushed to prepare the gypsum board coagulant. The application also discloses the use of the gypsum board set accelerator prepared by the preparation method of the gypsum board set accelerator in gypsum boards. By adopting the preparation method of the gypsum board coagulant provided by the application, the waste is used as the raw material of the coagulant, so that the waste is recycled, the cost is saved, the benefit is brought to a factory, and the gypsum board coagulant also meets the requirements of environmental protection; the gypsum board coagulant prepared by the impact mill has smaller volume weight and particle size distribution and larger specific surface area, so that the coagulant has better coagulation accelerating effect to meet the production requirement.)

1. A method for preparing gypsum board coagulant, wherein the raw material of the coagulant is waste material generated in the production of gypsum board, and the waste material is sent into an impact mill to be crushed to prepare the gypsum board coagulant.

2. The method of preparing a gypsum board set accelerator according to claim 1, wherein the waste material has a moisture content of less than 1% by weight.

3. The method of preparing a gypsum board set accelerator according to claim 1, wherein the impact mill is fed at a rate of 2kg to 20 kg.

4. The process for the preparation of set accelerators for gypsum board according to claim 1, wherein the impact mill is operated at a frequency of between 5 and 30 Hz.

5. The method of preparing a gypsum board set accelerator according to claim 1, wherein the impact mill is one or both of a vertical impact mill and a horizontal impact mill.

6. The method of making a gypsum board set accelerator according to claim 1, wherein the waste material is one or both of production waste board and three control waste board.

7. The method of making a gypsum board set accelerator according to claim 6, wherein one or both of the production waste board and the three control waste board contain fibrous impurities.

8. The method of preparing a set accelerator for gypsum board according to claim 7, wherein the fibrous impurities are waste paper.

9. The method of preparing a set accelerator for gypsum board according to any of claims 6 to 8, wherein the production waste board and the triple control waste board have an impurity content of 5 to 20% by weight.

10. Gypsum board set accelerator prepared according to the process of any one of claims 1 to 9.

11. The gypsum board set accelerator of claim 10, having a specific Boehringer surface area of 500m²/g～5000m²/g。

Technical Field

The application relates to but is not limited to the technical field of novel building materials, and particularly relates to a preparation method of a gypsum board coagulant and the gypsum board coagulant prepared by the preparation method.

Background

When the paper-surface gypsum board is produced, the setting time of the desulfurized gypsum is not required, and a coagulant is required to be added in a factory to set the desulfurized gypsum as soon as possible so as to meet the production requirement. At present, there are several coagulants available for factory selection, such as potassium sulfate, waste plates from ball milling or scrap, which have some coagulation promoting effects but also have some disadvantages. If the potassium sulfate is excessively mixed, a large amount of potassium ions can be introduced, so that the gypsum board is low in strength and poor in bonding performance; and contain many wastepapers in the flitch or leftover bits, can influence the crushing effect of ball mill, and then disturb the stability of gypsum board production, can reduce the compressive strength of gypsum board even.

Disclosure of Invention

In order to solve at least one of the technical problems, the invention provides a preparation method of a gypsum board accelerator, which uses waste as a raw material of the accelerator, realizes the recycling of the waste, saves the cost, brings benefits to factories, and meets the requirements of environmental protection; the gypsum board coagulant prepared by the impact mill has smaller volume weight and particle size and larger specific surface area, so that the coagulant has better coagulation accelerating effect to meet the production requirement.

The invention provides a preparation method of a gypsum board coagulant, wherein the raw material of the coagulant is waste material generated in the production of gypsum boards, and the waste material is sent into an impact mill to be crushed to prepare the gypsum board coagulant.

Optionally, the water content of the waste material is less than 1 wt%.

Optionally, the impact mill has a feed rate of 2kg to 20 kg.

Optionally, the impact mill operates at a frequency of 5Hz to 30 Hz.

Optionally, the impact mill is one or both of a vertical impact mill and a horizontal impact mill.

Optionally, the waste material is one or both of production waste board and three control waste board.

Optionally, one or both of the production waste sheet and the three control waste sheet comprises fibrous impurities.

Optionally, the fibrous impurities are waste paper.

Optionally, the impurity content of the production waste plate and the three-control waste plate is 5 wt% to 20 wt%.

The present application also provides gypsum board set accelerators prepared using the above-described methods of preparation.

Alternatively, the specific Boehringer surface area of the setting accelerator for plasterboards is 500m²/g～5000m²/g。

After the technical scheme is adopted, the invention has the following beneficial effects:

according to the preparation method of the gypsum board coagulant provided by the invention, the waste is used as the raw material of the coagulant, so that the waste is recycled, the cost is saved, the benefit is brought to a factory, and the gypsum board coagulant meets the requirements of environmental protection.

The gypsum board coagulant is prepared by adopting the impact mill, is simple to operate, short in crushing time, free of grinding aid, not easy to block and not influenced by paper scraps.

The gypsum board coagulant prepared by the impact mill has smaller volume weight and particle size distribution, larger specific surface area, shorter time for gypsum board coagulation, better coagulation accelerating effect and capability of improving the strength of the gypsum board to a certain extent so as to meet the production requirement.

Drawings

The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.

FIG. 1 is a graph of the particle size distribution of the gypsum board set accelerator obtained in examples 1-6.

Detailed Description

Embodiments of the present application are described below by way of examples, and it should be appreciated by those skilled in the art that these specific examples merely illustrate selected embodiments for achieving the purposes of the present application and are not intended to limit the technical solutions. Modifications of the technical solutions of the present application in combination with the prior art are obvious from the teachings of the present application and fall within the protection scope of the present application.

The set of accelerators used in the following examples are waste boards from the manufacture of gypsum board, and the application is further described with reference to specific examples.