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Rapid preparation of intercalation vermiculite superfine powder by ball grinding method

An ultra-fine powder, ball milling technology, applied in grain processing and other directions, can solve the problems of slow intercalation (several days to several months, high cost, complex process, etc., to improve intercalation and pulverization efficiency, improve Intercalation reaction efficiency, effect of efficient intercalation reaction

Inactive Publication Date: 2006-05-24
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the disadvantages of slow intercalation speed (a few days to several months), low intercalation rate, complex process, and a large amount of heat energy, which leads to high cost and difficulty in industrialization.

Method used

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  • Rapid preparation of intercalation vermiculite superfine powder by ball grinding method
  • Rapid preparation of intercalation vermiculite superfine powder by ball grinding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The vermiculite of Shijiazhuang Dongping Mining and Building Materials Factory was crushed through a jet mill, and passed through a 100-mesh sieve to obtain the raw material vermiculite VMT. Its chemical composition is: SiO 2 : 41.2%, AL 2 o 3 : 12.68%, MgO: 24.22%, CaO: 0.96%, FeO: 1.54%, Fe 2 o 3 : 4.06%, TiO 2 : 1.33%, K 2 O: 5.97%, P 2 o 5 : 0.06%, H 2 O: 3%, Na 2 O: 1.6%, MnO: 0.043%, TiO: 5.097%, loss on ignition 6.71%.

[0020] First, 50 grams of VMT sample was mixed with 2 times CEC of cetyltrimethylammonium bromide and 300 ml of deionized water to form a slurry. Grind in a ball mill for 15 minutes, 30 minutes, 1 hour, 2 hours, and 4 hours respectively. After grinding, the samples taken out are centrifuged, filtered, and washed 5 to 7 times with deionized water. + No white precipitate (AgBr) was detected. Finally, the centrifuged and filtered samples were dried and ground into powder to obtain samples VMT16-15m, VMT16-30m, VMT16-60m, VMT16-2h and VMT16...

Embodiment 2

[0024] First, mix and stir 50 grams of VMT sample with 2 times CEC of octadecyltrimethylammonium bromide and 300 ml of deionized water to form a slurry. Grind in a ball mill for 2 hours. After grinding, the sample taken out is centrifuged, filtered, and washed 5 to 7 times with deionized water. + No white precipitate (AgBr) was detected, and finally the centrifuged and filtered sample was dried and ground into powder to obtain the sample VMT18-2h respectively. X-ray powder diffraction (XRD) test was performed on VMT and VMT18-2h respectively. The corresponding spectra are shown in Fig. 4 respectively.

[0025] Fig. 4 is the XRD comparison pattern of samples VMT and VMT18-2h. The d value of the (001) plane diffraction peak of VMT in the figure, that is, the (001) crystal plane spacing is 1.46nm. The diffraction peak with a d value of 1.46nm of VMT18-2h disappeared, and the diffraction peak of nm appeared at the same time. It shows that after the ball milling method, the inter...

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Abstract

The method for quickly preparing intercalation type vermiculite superfine powder body by using ball-grinding process uses vermiculite raw ore as raw material and adopts the following steps: pulverizing vermiculite raw ore by using fluid jet mill, uniformly mixing the pulverized raw material with intercalation agent (quaternary ammonium hydroxide) and deionized water according to a certain ratio, grinding for a certain time in ball-grinding machine, water-washing, drying and pulverizing so as to obtain the intercalation type vermiculite superfine powder body. The vermiculite crystal-face interlaminar distance is extended to about 4.5nm.

Description

technical field [0001] The invention relates to the technology of intercalation modification of vermiculite and vermiculite concentrate by ball milling method to quickly obtain intercalation type vermiculite superfine powder. It is a pre-process for the preparation of vermiculite nanocomposites. technical background [0002] Vermiculite is a magnesium-containing hydroaluminosilicate secondary metamorphic mineral with a 2:1 layered structure, mainly the alteration product of biotite and phlogopite by low-temperature hydrothermal action, and its chemical formula is Mg x (H 2 O){Mg 3-x [AlSi 3 o 10 ](OH) 2}, including phyllosilicates of the montmorillonite-vermiculite family of clay mineral raw materials, such as montmorillonite, vermiculite, beidellite, nontronite, chrome montmorillonite, hectorite, and magnesium montmorillonite , rectorite, sodium rectorite, saponite, sauconite, talcite, stevenite, hectorite and aluminum-free sauconite, etc. The crystal structure of ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/00B02C19/06
Inventor 吴驰飞韩炜刘炜张喜亮郭卫红李慧
Owner EAST CHINA UNIV OF SCI & TECH
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