Continuous production method and apparatus for alpha semi-water gypsum

A technology of hemihydrate gypsum and a production method, which is applied in the field of gypsum processing, can solve the problems of large equipment investment, high labor intensity, complicated operation, etc., and achieves the effects of reducing investment, saving energy consumption, and simplifying technological process.

Inactive Publication Date: 2007-03-28
SHANXI BEIFANG GYPSUM IND
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Problems solved by technology

Large equipment investment, large area, complex operation, high labor intensity
If a large-scale reactor is used, when the α-type hemihydrate gypsum slurry is produced, the reactor cannot be used for the next production immediately, but as a storage tank, which is not only inefficient, but also consumes a lot of energy to maintain the reactor. Slurry will not revert to solidification

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  • Continuous production method and apparatus for alpha semi-water gypsum

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Embodiment Construction

[0018] A continuous production method of α-type hemihydrate gypsum, using dihydrate gypsum slurry as raw material, continuously pumping the dihydrate gypsum slurry into a reaction tube arranged in a heating box with a high-pressure pump, and the raw material slurry flows in the tube during the process When the temperature and pressure reach a certain value and keep it for a certain period of time, the dihydrate gypsum removes a semi-crystalline water to generate α-type hemihydrate gypsum, and the slurry containing α-type hemihydrate gypsum is sprayed into the drying separation tower through the nozzle, thereby obtaining drying. α-type hemihydrate gypsum powder; or spray into the gypsum stirring and forming device to make gypsum products.

[0019] When the slurry containing dihydrate gypsum is continuously pumped in by one end of the high-pressure pump, the other end discharges the slurry containing α-type hemihydrate gypsum 3 after dehydration reaction; that is to say, the leng...

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Abstract

The invention discloses an alpha-semi-hydrated gypsum continuous producing method and device. And the traditional 'liquid phase process' has disadvantages of high equipment investment, wide occupied land, complex to operate and high labor strenghth. But the invention changes the traditional reaction kettle into a reaction pipe with a certain length, which is coilded in a heating box, one end of the reaction pipe connected with raw material pulp high pressure pump and the other end connected with a drying separation tower or gypsum blend-mouding device, thus implemnting continuous production of alpha-semi-hydrated gypsum. Therefore, the invention has advantages of saving reaction equipment investment and reducing production energy consumption.

Description

technical field [0001] The invention relates to the processing technology of gypsum, in particular to a kind of α-type hemihydrate gypsum production method and device. Background technique [0002] At present, the only mature process for producing α-type hemihydrate gypsum with powdery dihydrate gypsum as raw material is the "liquid phase method", which is to put powdery dihydrate gypsum into a reactor for high temperature and high pressure cooking, and then dry and After secondary grinding, α-type hemihydrate gypsum powder can be obtained. This traditional "liquid phase method" to produce α-type hemihydrate gypsum powder has expensive drying system equipment, high energy consumption and complicated operation. If the reacted α-type hemihydrate gypsum slurry is no longer dried and directly cast into gypsum products, not only the investment of drying equipment but also energy can be saved. However, because the "liquid phase method" production requires a high pressure condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/02
Inventor 王永昌张继忠柏飞
Owner SHANXI BEIFANG GYPSUM IND
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