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High strength gypsum production method

A production method and high-strength technology, applied in chemical instruments and methods, inorganic chemistry, calcium/strontium/barium compounds, etc., can solve problems such as the inability to meet the performance requirements of gypsum, and achieve drying performance, high compressive strength, and purity. High, simple method

Inactive Publication Date: 2015-04-15
QINGDAO SHOUSHENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of the economy in recent years, the demand is constantly increasing, and the quality and performance requirements for gypsum are getting higher and higher. requirements

Method used

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Embodiment

[0013] The production method of high-strength gypsum in this embodiment includes the following steps: (1) Crushing the gypsum raw material to obtain gypsum with a block size of 2 (3) The gypsum slurry is heated to 30-100°C by the heat conduction oil heating system, and the uniformly mixed gypsum slurry is transferred to the crystal converter through the high-pressure slurry pump, and further diluted in the crystal converter. At the same time, add the crystallization agent and raise the temperature to 80-150°C, the gypsum slurry crystallizes for the first time under the pressure of 3-6MPa and the action of the crystallization agent; (4) Transfer the first crystallized gypsum crystals to the next crystallizer, Carry out secondary crystallization, the crystallization temperature is 110-150°C, and the pressure is 3-6MPa; (5) Send the secondary crystallized gypsum slurry to a centrifuge for separation, and the temperature of the centrifuge is 40-160 (6) The liquid separated by the s...

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Abstract

The present invention discloses a high strength gypsum production method, which comprises: crushing a gypsum raw material, grinding into gypsum powder with a particle size of 50-100 [mu]m, conveying the grinded gypsum powder into a mixing tank through conveying equipment to prepare a gypsum slurry with a concentration of 1200-1500 g / cm<2>, heating the gypsum slurry to a temperature of 30-100 DEG C through a heat conduction oil heating system, transferring the uniformly-mixed gypsum slurry into a crystal transition device through a high pressure slurry pump, carrying out further dilution, concurrently adding a crystal transition agent, carrying out primary crystallization, transferring the obtained gypsum crystal into the follow-up crystallization device, carrying out secondary crystallization, conveying the obtained gypsum slurry into a centrifuge separator to separate, introducing hot wind with a temperature of 40-160 DEG C into the centrifuge separator during the separating, placing the separated wet gypsum crystal into a dryer to further dry, and conveying into a material tank through the convey equipment, wherein the generated gypsum crystal has characteristics of high purity, strong mechanical property, high drying performance and high compressive strength.

Description

[0001] technical field [0002] The invention belongs to the technical field of gypsum, and in particular relates to a production method of high-strength gypsum. [0003] Background technique [0004] As a high-quality cementing material, high-strength gypsum powder is widely used in ceramics, precision casting, medical, aviation, shipbuilding, automobiles, plastics, architectural art, and arts and crafts to make various molds and models. The superiority of its own performance is favored, and the social demand is very large. With the rapid development of the economy in recent years, the demand is constantly increasing, and the quality and performance requirements for gypsum are getting higher and higher. requirements. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems in the prior art, the object of the present invention is to provide a production method of high-strength gypsum, which is simple, suitable for mass pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46
CPCY02P20/129C01F11/466
Inventor 李继升
Owner QINGDAO SHOUSHENG IND
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