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Method for improving expansion performance of vermiculite

A technology of expansion performance and vermiculite, which is applied in the field of improving the expansion performance of vermiculite, can solve the problem that the expansion rate of vermiculite is not high enough, and achieve the effects of simple and effective control method, simple equipment and easy separation.

Active Publication Date: 2018-11-13
TARIM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the expansion rate of vermiculite in this method is not high enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put 2 grams of raw ore vermiculite and 10 grams of water into a 20 mL hydrothermal reaction kettle, and then carry out high temperature and high pressure hydrothermal modification at 180 °C for 24 hours under magnetic stirring at 50 rpm. After the hydrothermal modification, the expanded vermiculite is obtained by filtering and expanding under the microwave power of 1500W, and the expansion rate of the expanded vermiculite is 800%.

Embodiment 2

[0031] Put 2 grams of raw ore vermiculite and 3.5 grams of potassium nitrate and 8 grams of water into a 20 mL hydrothermal reaction kettle, and then carry out high temperature and high pressure hydrothermal modification at 180 °C for 24 hours under magnetic stirring at 80 rpm. After hydrothermal modification, it is filtered and expanded at 850° C. to obtain expanded vermiculite, and the expansion rate of the expanded vermiculite is 1920%.

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PUM

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Abstract

The invention discloses a method for improving expansion performance of vermiculite. The method comprises the following steps: hydrothermally modifying raw ore vermiculite and water or a salt solutionwhile heating and magnetically stirring at high temperature and high pressure, and then expanding a hydrothermally modified material to obtain expanded vermiculite. By the method, through the high temperature and the high pressure, water molecules and ions between vermiculite layers are regulated and controlled so as to achieve the purpose of regulating and controlling the expansion rate or the peeling degree of the vermiculite; the method has the advantages of a simple and effective regulating and controlling method, a high expansion ratio, easiness in separation, simple equipment, improvedproduction efficiency, less pollutants, an obvious economic value and the like.

Description

technical field [0001] The invention relates to the technical field of vermiculite, in particular to a method for improving the expansion performance of vermiculite. Background technique [0002] Vermiculite is one of the non-metallic minerals with good resource prospects and potential advantages in my country. It is an important non-metallic mineral and a secondary metamorphic mineral of magnesium-containing hydroaluminosilicate in a layered structure. Silicate, cheap and easy to get. Vermiculite can withstand high temperature, is a poor conductor of heat, and has good electrical insulation; expanded vermiculite is easy to absorb water and moisture; it expands at high temperature and is easy to peel off. Vermiculite has the characteristics of good interlayer cation exchange capacity, expansion capacity, adsorption capacity, sound insulation, heat insulation, fire resistance, freeze resistance, etc., and has stable chemical properties, insoluble in water, non-toxic, tasteles...

Claims

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Application Information

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IPC IPC(8): C01B33/38
CPCC01B33/38
Inventor 田维亮葛振红刘晓静
Owner TARIM UNIV
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