Preparation method of montmorillonite superfine powder

An ultra-fine powder, montmorillonite technology, applied in grain processing and other directions, can solve the problems of high equipment depreciation, large one-time investment, high crushing limit, and achieve the effects of improved purity, low energy consumption and uniform particle size.

Active Publication Date: 2012-06-27
湖北三鼎科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are also some problems: high equipment manufacturing cost, large one-time investment, high depreciation cost of equipment, the key problem is that the crushing limit of montmorillonite products is high and the output is small
However, due to the effect of montmorillonite and interlayer water and the ionization of water to produce H + and OH - The interaction makes the dehydrated and dried montmorillonite reunite into large particles, and this kind of agglomeration force is strong, and the particle hardness and toughness are relatively high. Montmorillonite Ultrafine Powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The Zhejiang purified montmorillonite and ethanol are pulped according to the solid-to-liquid ratio (mass ratio) of 1:9, and then the slurry is input into the MBP80 type peeling machine for ultra-fine peeling, and the particle size distribution of the ultra-fine slurry is D 80 is 1.95 μm, the ultrafine slurry is classified in a horizontal screw discharge centrifuge to remove coarse particles, and the particle size distribution of the ultrafine slurry obtained after classification is D 90 1.9 μm, finally concentrated, dried and dispersed to obtain D 90 Ultrafine montmorillonite powder less than 2μm.

Embodiment 2

[0024] Purified montmorillonite from Sichuan, mixed solution with ethanol: water (volume ratio) at 3:1, made slurry according to solid-liquid ratio (mass ratio) 1:15, then input the slurry into MBP80 type peeling machine for ultra-fine peeling Fine slurry particle size distribution D 80 is 5.0 μm, the ultrafine slurry is classified in a centrifuge to remove coarse particles, and the particle size distribution of the ultrafine slurry obtained after classification is D 90 5.0 μm, finally concentrated, dried and dispersed to obtain D 90 Ultrafine montmorillonite powder less than 5.0μm.

Embodiment 3

[0026] The purified montmorillonite from Henan is mixed with ethanol: water (volume ratio) at 3:0.7 to make slurry according to the solid-to-liquid ratio (mass ratio) of 1:20, and then the slurry is input into the stirring mill for ultra-fine peeling. After slurry particle size distribution D 80 The particle size distribution of the superfine slurry obtained after classification is D 90 4.0μm, finally concentrated, dried and dispersed to obtain D 90 Ultrafine montmorillonite powder less than 4.5μm.

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PUM

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Abstract

The invention provides a preparation method of montmorillonite superfine powder, comprising the following steps of: a, preparing montmorillonite and an ethanol solution into slurry according to a solid-liquid ratio by weight that the montmorillonite to the ethanol solution is 1: (2-99), wherein the ethanol solution is a mixture of water and ethanol and the volume ratio of the ethanol to the water is 3: (0-1); b, inputting the prepared slurry into superfine equipment to carry out superfine stripping; c, removing rough grains of the slurry which is carried out by the superfine stripping by grades through wet-method grading equipment, so as to obtain superfine slurry with uniform grain diameters; and d, concentrating, drying and scattering the superfine slurry to obtain the montmorillonite superfine powder. According to the method provided by the invention, the problems of preparing the montmorillonite superfine powder by existing dry-method and wet-method superfine methods are solved, so that the industrialization of the montmorillonite superfine powder is realized. The key technology provided by the invention is as follows: the ethanol solution with a certain concentration is used as a medium to disperse the montmorillonite and carry out graded concentration and drying on the montmorillonite through the superfine stripping; and finally, the montmorillonite superfine powder is obtained through a scattering process.

Description

Technical field: [0001] The invention relates to the technical field of deep processing of montmorillonite, in particular to a preparation method of superfine montmorillonite powder. Background technique: [0002] Montmorillonite (montmorillonite), also known as microcrystalline kaolinite, is a layered structure, flaky crystal silicate clay ore, named after it was first discovered in Montmorillon, France, in the geological age by Made from natural volcanic ash. Observed under an electron microscope, the crystals are monoclinic and generally in the form of irregular flakes. The color is white with light gray, sometimes with light blue or light red, and the luster is dull. Montmorillonite has strong adsorption capacity, ion exchange capacity, high degree of colloid, plasticity and cohesion, and strong water absorption. Due to its unique physical and chemical properties, delithiasis is widely used in metallurgy, electromechanical, chemical industry, construction, paint, petr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00
Inventor 寿瑾枫严春杰谌刚韩秀山梅娟
Owner 湖北三鼎科技有限公司
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