Method for producing expanded vermiculite with microwave method

A technology of expanded vermiculite and microwave method, which is applied in the field of preparation of expanded vermiculite, which can solve the problems of waste gas emission, affecting the quality of vermiculite, and occupational diseases of workers

Inactive Publication Date: 2008-05-07
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it is heated at 800-900 degrees, the vermiculite will gradually become brittle and fragmented while expanding, resulting in a lot of expanded vermiculite powder, which greatly affects the quality and application range of expanded vermiculite
In addition, the thermal expansion process mostly uses coal as fuel to generate heat, which will cause waste gas emissions and pollute the environment. At the same time, because there are more inhalable particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 5 grams of Xinjiang Yuli vermiculites with a diameter of 2 mm are used for puffing;

[0024] Wash the vermiculite in tap water to remove sand and soil. After washing 5 times, the lotion is no longer turbid, and then wash it with deionized water 2-3 times until the water after washing the vermiculite is clear and there is no suspended matter;

[0025] Spread the cleaned vermiculite on a plastic film, pick out the small stones, and then put the plastic film and vermiculite in a ventilated place to dry for 48 hours and dry naturally;

[0026] Pass the dried vermiculite through a sieve with a diameter of 1.5mm to remove broken vermiculite flakes and some small-diameter impurities in the vermiculite;

[0027] Measure the thickness of the sieved vermiculite one by one, record;

[0028] Put the vermiculite whose thickness has been measured and recorded into the quartz boat, 10 pieces are arranged in a row, put into the microwave oven to heat, the power is set to 100W, and the...

Embodiment 2

[0034] 5 grams of Xinjiang Yuli vermiculites with a diameter of 3 mm are used for puffing;

[0035] Wash the vermiculite in tap water to remove sand and soil. After washing 5 times, the lotion is no longer turbid, and then wash it with deionized water 2-3 times until the water after washing the vermiculite is clear and there is no suspended matter;

[0036] Spread the cleaned vermiculite on a plastic film, pick out the small stones, and then put the plastic film and vermiculite in a ventilated place to dry for 48 hours and dry naturally;

[0037] Pass the dried vermiculite through a sieve with a diameter of 2.5 mm to remove broken vermiculite flakes and some small-diameter impurities in the vermiculite;

[0038] Measure the thickness of the sieved vermiculite one by one, record;

[0039] Put the vermiculite whose thickness has been measured and recorded into the quartz boat, arrange 10 pieces in a row, put it into the microwave oven to heat, set the power to 400W, and the tim...

Embodiment 3

[0045] 5 grams of Xinjiang Yuli vermiculites with a diameter of 2 mm are used for puffing;

[0046] Wash the vermiculite in tap water to remove sand and soil. After washing 5 times, the lotion is no longer turbid, and then wash it with deionized water 2-3 times until the water after washing the vermiculite is clear and there is no suspended matter;

[0047] Spread the cleaned vermiculite on a plastic film, pick out the small stones, and then put the plastic film and vermiculite in a ventilated place to dry for 48 hours and dry naturally;

[0048]Pass the dried vermiculite through a sieve with a diameter of 1.5mm to remove broken vermiculite flakes and some small-diameter impurities in the vermiculite;

[0049] Measure the thickness of the sieved vermiculite one by one, record;

[0050] Put the vermiculite whose thickness has been measured and recorded into the quartz boat, 10 pieces are arranged in a row, put it into the microwave oven to heat, the power is set to 500W, and t...

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Abstract

The invention relates to a method of producing expanding vermiculite with a microwave method. The method comprises the steps as follows: microwave is adopted to expand for the vermiculite and interactive effect happens between the microwave and the vermiculite. The microwave effect causes water shake acutely among vermiculite layers. The partial temperature among layers arises rapidly and water among layers boiloffs rapidly. The vaporization water produces partial pressure to maintain the vermiculite layers and the layers. The invention has the macroscopic behavior that the vermiculite expands rapidly, and avoids the process of temperature expansion, thereby resolving the problem of brickle vermiculite after expansion. Simultaneously, as the vermiculite is cleaned before the expansion, the content of impurity is decreased and the quality of vermiculite after expansion is improved. The high-quality expanded vermiculite made by adopting the method can be used in the application fields such as high-quality expansion vermiculite powder for producing high-temperature mechanism part heat barrier coating, bulking agent for composing the organic clay composite material, filling material of energy-saving heat preservation wall and materials for producing high-quality heat insulation vermiculite boards.

Description

technical field [0001] The invention relates to a method for preparing expanded vermiculite by microwave Background technique [0002] Expanded vermiculite is made by heating vermiculite raw ore to a certain temperature, rapidly losing water and expanding rapidly. Expanded vermiculite has the characteristics of fire prevention, heat insulation, sound absorption, non-toxic, low weight capacity, moisture absorption and antibacterial, and is widely used in construction and industrial energy saving. , environmental protection, agriculture and animal husbandry, horticulture and other fields. [0003] In the construction industry, expanded vermiculite is mainly used to make loose fillers, expanded vermiculite products, expanded vermiculite concrete, etc., and is used as materials for light weight, heat preservation, heat insulation, sound absorption, and fire prevention. For example, after the expanded vermiculite is dispersed in the asphalt, the lightweight roof board made of it...

Claims

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Application Information

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IPC IPC(8): C04B20/02
CPCC04B20/06C04B14/204
Inventor 陈朝阳范艳伟杜彦召王军华
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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