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A method for dry transformation of gypsum whiskers

A gypsum whisker and transformation technology, which is applied in the field of gypsum whisker dry transformation technology, can solve the problems of long time consumption, low quality stability, high production equipment requirements, etc.

Inactive Publication Date: 2017-03-15
湖北沃裕新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of process production requires high production equipment, and the discharge of water and the secondary drying process of gypsum whiskers in the production process take a long time, and the gypsum whiskers produced are not high in purity, with uneven crystal shapes and high quality. Low stability, slow water filtration, low production efficiency and high production cost

Method used

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  • A method for dry transformation of gypsum whiskers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] As shown in the figure, the lower end cover 5 of the autoclave 1 is sealed, and the gypsum whiskers are packed into the autoclave 1, preferably without the steam heat exchanger 2;

[0016] Seal the upper end cover 4 of the autoclaved steaming kettle 1, close the pressure relief port 9 on the kettle body and the drain port 6 of the lower end cover, and slightly open the exhaust port 7;

[0017] Simultaneously open the switch 13 and the switch 14 leading to the steam heat exchanger and the direct steam inlet on the steam sub-cylinder 3, and feed in steam at 130°C;

[0018] When the temperature displayed by the thermometer 10 in the autoclave 1 reaches 60° C., turn off the switch 14;

[0019] When the temperature displayed by the temperature gauge 10 in the autoclave 1 reaches 120°C and the pressure displayed by the pressure gauge 11 reaches 0.2MPa-0.5MPa, the switch 13 is turned off;

[0020] After heat preservation and pressure holding for 3-6 hours, open the pressure r...

Embodiment 2

[0024] As shown in the figure, the lower end cover 5 of the autoclave 1 is sealed, and the gypsum whiskers are put into the autoclave 1, preferably to cover the steam heat exchanger 2;

[0025] Seal the upper end cover 4 of the autoclaved steaming kettle 1, close the pressure relief port 9 on the kettle body and the drain port 6 of the lower end cover, and slightly open the exhaust port 7;

[0026] Simultaneously open the switch 13 and the switch 14 leading to the steam heat exchanger and the direct steam inlet on the steam sub-cylinder 3, and feed steam at 150°C;

[0027] When the temperature displayed by the temperature gauge 10 in the autoclave 1 reaches 80°C-90°C, turn off the switch 14;

[0028] When the temperature displayed by the temperature gauge 10 in the autoclave 1 reaches 120°C-150°C, and the pressure displayed by the pressure gauge 11 reaches 0.2MPa-0.3MPa, the switch 13 is turned off;

[0029] After heat preservation and pressure holding for 3-6 hours, open the...

Embodiment 3

[0033] As shown in the figure, the lower end cover 5 of the autoclave 1 is sealed, and the gypsum whiskers are packed into the autoclave 1, preferably without the steam heat exchanger 2;

[0034] Seal the upper end cover 4 of the autoclaved steaming kettle 1, close the pressure relief port 9 on the kettle body and the drain port 6 of the lower end cover, and slightly open the exhaust port 7;

[0035] Simultaneously open the switch 13 and the switch 14 leading to the steam heat exchanger and the direct steam inlet on the steam sub-cylinder 3, and feed in steam at 190°C;

[0036] When the temperature displayed by the temperature gauge 10 in the autoclave 1 reaches 100° C., turn off the switch 14;

[0037] When the temperature displayed by the temperature gauge 10 in the autoclave 1 reaches 150°C and the pressure displayed by the pressure gauge 11 reaches 0.3MPa-0.5MPa, the switch 13 is turned off;

[0038] After heat preservation and pressure holding for 3-6 hours, open the pre...

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Abstract

The invention discloses a gypsum whisker dry method transformation method, the upper end of an autoclave steaming kettle is used for feeding, the lower end of the autoclave steaming kettle is used for discharge, superheated steam and heat transfer steam double heat paths are respectively used for segmented heating, pressurizing and evaporating to dryness of gypsum whisker. The gypsum whisker dry method transformation method can achieve the transformation of gypsum whisker morphology. The gypsum whisker dry method transformation method is simplified in production process and equipment, single in heat source, high in efficiency, and low in energy consumption, a transformed product is uniform in crystalline form, high in the ratio of length to diameter, high in crystal strength, and good in toughness.

Description

[0001] Technical field: [0002] The invention relates to a dry transformation process of gypsum whiskers. [0003] Background technique: [0004] Gypsum whiskers can be transformed by hydrothermal method or salt solution method, that is, in the transformation process, water or inorganic salt solution and gypsum whiskers are mixed in a certain proportion, and various types of crystal modifiers are added at the same time. Heat up and pressurize. This kind of process production has high requirements on production equipment, the discharge of water and the secondary drying process of gypsum whiskers in the production process take a long time, and the produced gypsum whiskers are not high in purity, with uneven crystal shape and high quality. Low stability, slow water filtration, low production efficiency and high production cost. [0005] Invention content: [0006] The technical problem to be solved by the present invention is to provide a gypsum whisker transformation process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/62C30B29/22C30B33/02
Inventor 余章成陶荣华王云飞
Owner 湖北沃裕新材料科技有限公司
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