Preparation method of montmorillonite superfine powder
An ultra-fine powder, montmorillonite technology, applied in grain processing and other directions, can solve the problems of large one-time investment, high equipment depreciation cost, high manufacturing cost, and achieve the effects of low energy consumption, improved purity, and uniform particle size.
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Embodiment 1
[0021] 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 to obtain the ultra-fine peeled slurry; the ultra-fine peeled slurry Particle size distributionD 80 1.95μm, the slurry after ultra-fine peeling is classified in a horizontal screw discharge centrifuge to remove coarse particles, and the ultra-fine slurry after classification is obtained; the particle size distribution of the ultra-fine slurry 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
[0023] 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, Obtain the slurry after the ultrafine peeling; the particle size distribution of the slurry after the ultrafine peeling D 80 5.0 μm, the slurry after ultra-fine peeling is classified in a centrifuge to remove coarse particles, and the ultra-fine slurry after classification is obtained; the particle size distribution of the ultra-fine slurry 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
[0025] The purified montmorillonite from Henan is mixed with ethanol: water (volume ratio) at 3:0.7 to make a slurry according to the solid-to-liquid ratio (mass ratio) of 1:20, and then the slurry is input into a stirring mill for ultra-fine peeling to obtain ultra-fine Slurry after fine peeling; particle size distribution of slurry after ultra-fine peeling D 80 4.5μm, the slurry after ultra-fine peeling is classified in a centrifuge to remove coarse particles, and the classified ultra-fine slurry is obtained; the particle size distribution of the classified ultra-fine slurry 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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