Method for purifying superfine montmorillonite
A purification method and montmorillonite technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of limited improvement of bentonite dispersibility, cumbersome sodium treatment, water and energy consumption, etc. Suspension performance, wide application range, high yield effect
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Embodiment 1
[0034] Zhejiang bentonite is mainly made up of minerals such as montmorillonite, quartz, feldspar, kaolin, wherein montmorillonite content is 74%, and its XRD diffraction pattern is shown in accompanying drawing 1, according to soil-water ratio (the weight ratio of bentonite ore and water ) 1:4 soaked in a high-speed mixer to make slurry, and passed through a 200-mesh sieve to remove large particles of impurities, and then input the slurry into the MBP80 type peeler for ultra-fine peeling. After slurry particle size distribution D 50 1.26μm, D 75 The particle size distribution of the ultra-fine slurry is 1.98 μm, and the ultra-fine slurry is swirled in a hydrocyclone to remove fine sand, and the particle size distribution of the high-purity slurry obtained after classification is D 90 1.9 μm, finally dehydrated, dried and pulverized to obtain high-purity ultrafine montmorillonite, its XRD diffraction pattern is shown in Figure 2.
[0035] It can be seen from accompanying dra...
Embodiment 2
[0037] The Sichuan bentonite ore 1 is mainly composed of two minerals, montmorillonite and quartz, wherein the content of montmorillonite is 81%, and its XRD diffraction pattern is shown in Figure 3, after pulping in a pulper according to the soil-water ratio of 1:6 Pass through a 100-mesh sieve to remove large particles of impurities, and then input the slurry into a sand mill for ultra-fine peeling. The specific gravity of the grinding medium selected in the sand mill is 3.2, and the particle size distribution of the ultra-fine slurry is D 50 1.02μm, D 75 The ultra-fine slurry is centrifugally classified in a centrifuge to remove fine sand, and the particle size distribution of the high-purity slurry obtained after classification is D 90 1.98 μm, finally dehydrated, dried and pulverized to obtain high-purity ultrafine montmorillonite, its XRD diffraction pattern is shown in Figure 4.
[0038]It can be seen from accompanying drawing 4 that the high-purity ultrafine montmoril...
Embodiment 3
[0040] The Sichuan bentonite raw ore 2 is mainly composed of montmorillonite and quartz two minerals, wherein the content of montmorillonite is 92%, and its XRD diffraction pattern is shown in accompanying drawing 5, after pulping in a pulping machine according to the soil-water ratio of 1:8 Pass through a 180-mesh sieve to remove large particles of impurities, and then enter the slurry into the MBP80 type peeler for ultra-fine peeling. The specific gravity of the grinding medium selected in the peeler is 4.2, and the particle size distribution of the ultra-fine slurry is D 50 1.44μm, D 75 The ultra-fine slurry is centrifugally classified in a centrifuge to remove fine sand, and the particle size distribution of the high-purity slurry obtained after classification is D 90 1.51 μm, finally dehydrated, dried and pulverized to obtain high-purity ultrafine montmorillonite, its XRD diffraction pattern is shown in Figure 6.
[0041] It can be seen from accompanying drawing 6 that t...
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