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Production method of gypsum board

A production method and gypsum board technology, applied in the field of gypsum board production, can solve problems such as long production cycle, low production efficiency, and large consumption, and achieve the effects of reduced mining, low energy consumption, and reduced costs

Inactive Publication Date: 2012-07-11
LOMON BILLIONS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristics of this method: dihydrate gypsum needs to be converted into hemihydrate gypsum through crushing, drying, calcination and other processes, which consumes a lot of energy such as electricity and coal, long production cycle and low production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add the mother liquor acid of the sulfuric acid method to the production of titanium dioxide into the reaction vessel, preheat and keep its temperature at 90℃, and then add the crystal form conversion agent and seed crystals to the reaction vessel. The amount of the crystal form conversion agent is the expected output of hemihydrate gypsum The amount of seed crystal added is 4% of the expected output of hemihydrate gypsum, and then evenly add calcium powder into the reaction vessel and control the reaction temperature at 90℃. After the reaction, the hemihydrate gypsum slurry is obtained, and then the hemihydrate gypsum slurry is obtained. The hydrated gypsum slurry is added with glass fiber, surface active agent, foaming agent, and modified starch. After stirring, the gypsum board is formed, solidified, cut, and dried.

[0015] The above seed crystal is hemihydrate gypsum, and the crystal form conversion agent is one or a mixture of succinic acid, palmitic acid and sodium c...

Embodiment 2

[0018] Add the mother liquor acid of the sulfuric acid method to the production of titanium dioxide into the reaction vessel, preheat and keep its temperature at 102℃, and then add the crystal form conversion agent and seed crystals to the reaction vessel. The amount of the crystal form conversion agent is the expected output of hemihydrate gypsum The amount of seed crystal added is 6% of the expected output of hemihydrate gypsum, and then evenly add calcium powder to the reaction vessel, and control the reaction temperature at 102℃. After the reaction, the hemihydrate gypsum slurry is obtained, and then the hemihydrate gypsum slurry is obtained. The hydrated gypsum slurry is added with glass fiber, surface active agent, foaming agent, and modified starch. After stirring, the gypsum board is formed, solidified, cut, and dried.

[0019] The above seed crystal is hemihydrate gypsum, and the crystal form conversion agent is one or a mixture of succinic acid, palmitic acid and sodium ...

Embodiment 3

[0022] Add the mother liquor acid of the sulfuric acid method to the production of titanium dioxide into the reaction vessel, preheat and keep its temperature at 102℃, and then add the crystal form conversion agent and seed crystals to the reaction vessel. The amount of the crystal form conversion agent is the expected output of hemihydrate gypsum The amount of seed crystal added is 6% of the expected output of hemihydrate gypsum, and then evenly add calcium powder into the reaction vessel, and control the reaction temperature at 90℃. After the reaction, the hemihydrate gypsum slurry is obtained, and then the hemihydrate gypsum slurry is obtained. The hydrated gypsum slurry is added with glass fiber, surface active agent, foaming agent, and modified starch. After stirring, the gypsum board is formed, solidified, cut, and dried.

[0023] The above seed crystal is hemihydrate gypsum, and the crystal form conversion agent is one or a mixture of succinic acid, palmitic acid and sodium...

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PUM

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Abstract

The invention discloses a production method of a gypsum board, which comprises the following steps: adding glass fibers, a surfactant, a foaming agent and modified starch into hemihydrate gypsum slurry, uniformly agitating, forming, solidifying, cutting and drying to obtain the gypsum board. A preparation method of the hemihydrate gypsum slurry comprises the following steps: pre-heating sulfuric acid solution, adding a crystal transformation agent and a seed crystal into the sulfuric acid solution, uniformly adding calcium powder into the sulfuric acid solution and controlling the reaction temperature to obtain the hemihydrate gypsum slurry after the end of reaction. Compared with the prior art, the production method has the benefits that the hemihydrate gypsum slurry prepared by industrial waste acid as well as the calcium powder is directly used for the production of the gypsum board, the cost is reduced, the process flow is shortened, the exploitation of natural gypsum is reduced, and the production method has the advantage of low energy consumption.

Description

Technical field [0001] The invention relates to a production method of gypsum board. Background technique [0002] At present, the production method of gypsum board is to pulverize, dry, calcinate and dehydrate natural dihydrate gypsum or synthetic dihydrate gypsum (such as phosphogypsum, titanium gypsum, fluorogypsum, etc.) to obtain hemihydrate gypsum powder. A certain amount of water is added to the gypsum powder to prepare a semi-hydrated gypsum slurry, and then glass fiber, surfactant, foaming agent, white latex, etc. are added to the semi-hydrated gypsum slurry, and the mixture is uniformly stirred and then molded and cut. , Dry the gypsum board. The characteristics of this method: Dihydrate gypsum needs to be converted into hemihydrate gypsum through processes such as crushing, drying, and calcination, which consumes a lot of energy such as electricity and coal, has a long production cycle and low production efficiency. Summary of the invention [0003] The purpose of the...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/14
Inventor 杨民乐陈建立吴彭森李双庆苗委然杨美荣陈晓丽李会娟
Owner LOMON BILLIONS GRP CO LTD
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