Ceramic mould preparation gypsum powder and preparation method thereof

A technology for ceramic molds and gypsum powder, which is applied in the field of gypsum powder for preparing ceramic molds and its preparation, can solve the problems of poor water absorption, poor coagulation expansion rate, low strength, etc. Excellent performance

Active Publication Date: 2015-05-13
JIANGSU EFFUL SCIENCE AND TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the problem solved by the present invention is: the strength of the ceramic mold prepared by the previous α, β type hemihydrate gypsum is low, the water absorption is poor, and the condensation expansion rate is poor

Method used

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  • Ceramic mould preparation gypsum powder and preparation method thereof
  • Ceramic mould preparation gypsum powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The desulfurized gypsum and citric acid gypsum were calcined in a fluidized bed calcination system at a ratio of 3.5:1 by weight, and then pulverized by grinding equipment for 10 minutes. By weight, take 98.96 parts of main material powder after grinding, 0.04 parts of sodium citrate, and 1 part of quicklime, put them into a mixer, stir for 25 minutes, and the stirring speed is 58 rpm to obtain 100 parts of ceramic mold gypsum powder.

Embodiment 2

[0024] The desulfurized gypsum and citric acid gypsum were calcined in a fluidized bed calcination system at a ratio of 4:1 by weight, and then ground for 25 minutes with a grinding equipment. By weight, take 98.98 parts of ground gypsum powder, 0.02 parts of citric acid, and 1 part of calcium sulfate whisker, and put them into a mixer, stirring for 30 minutes at a stirring speed of 60 rpm to obtain 100 parts of ceramic mold gypsum powder.

Embodiment 3

[0026] The desulfurized gypsum and citrate gypsum were calcined in a fluidized bed calcination system at a weight percentage of 4.5:1, and then ground for 15 minutes with a grinding equipment. By weight, take 98.95 parts of ground gypsum powder, 0.05 parts of citric acid, and 1 part of quicklime, put them into a mixer, stir for 35 minutes, and the stirring speed is 62 rpm to obtain 100 parts of ceramic mold gypsum powder.

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Abstract

Ceramic mould preparation gypsum powder includes a main material and an auxiliary material, the main material component includes desulfurization gypsum and citric acid gypsum with the mass ratio of 3:1-5:1; the auxiliary material includes a retarder, calcium sulphate whisker and quick lime, the retarder accounts for 0.01-0.05 % by mass of the main material, the calcium sulfate whisker accounts for 0-2 % by mass of the main material, and the quick lime accounts for 0-2 % by mass of the main material. The preparation method of the ceramic mould preparation gypsum powder is as follows: (1) the desulfurization gypsum and the citric acid gypsum are put into a fluidized bed calcining system for calcining; (2) the calcined main material is ground by grinding equipment; (3) the ground main material is added with the auxiliary materials for modifying. The gypsum powder water absorption rate is high, condensation expansion rate is restrained, and the intensity is high.

Description

technical field [0001] The invention relates to gypsum powder and a preparation method thereof, in particular to a gypsum powder for preparing ceramic molds and a preparation method thereof. Background technique [0002] Grouting molding is a simple and practical ceramic molding process. Because gypsum products have a series of advantages such as light weight, high production efficiency, good fire resistance, easy pouring, rich resources, and low energy consumption, it is widely used in plastic crafts. It is used as model plaster in making dentistry, ceramics, and mechanical casting. Model gypsum is divided into two types: ordinary model gypsum and high-strength gypsum. The model gypsum used to make ceramics in my country accounts for about 15% of my country's ceramic production industry, and the ceramic industry is a traditional industry in my country, so it has attracted widespread attention and achieved a lot of achievements. However, in recent years, with the tension o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B14/38
Inventor 刘丽娟唐永波谢波万建东
Owner JIANGSU EFFUL SCIENCE AND TECHNOLOGY CO LTD
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