Method for purifying superfine montmorillonite
A purification method, 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., to achieve improved dispersion Suspension performance, wide application range, high productivity effect
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Embodiment 1
[0032] Zhejiang bentonite is mainly composed of montmorillonite, quartz, feldspar, kaolin and other minerals, and the content of montmorillonite is 74%, and its XRD diffraction pattern is shown in the attached figure 1 According to the ratio of soil to water (the weight ratio of bentonite ore and water) 1:4, soak and stir in a high-speed mixer to make pulp, then pass through a 200-mesh sieve to remove large particles of impurities, and then enter the slurry into the MBP80 type peeling machine for ultra-fine peeling. The specific gravity of the grinding medium selected in the peeling machine is 2.7, and the particle size distribution of the superfine slurry is 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 the 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 crushed to obtain h...
Embodiment 2
[0035] The Sichuan bentonite ore 1 is mainly composed of two minerals, montmorillonite and quartz, of which the content of montmorillonite is 81%, and its XRD diffraction pattern is shown in the attached image 3 According to the soil-water ratio of 1:6, after pulping in the pulping machine, pass through a 100-mesh sieve to remove large particles of impurities, and then enter the slurry into the sand mill for ultra-fine peeling. The specific gravity of the grinding medium selected in the sand mill is 3.2 , particle size distribution of ultra-fine slurry 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 crushed to obtain high-purity ultrafine montmorillonite, its XRD diffraction pattern is shown in the attached Figure 4 .
[0036] From attached Figure 4It can be seen that the high-p...
Embodiment 3
[0038] The Sichuan bentonite ore 2 is mainly composed of two minerals, montmorillonite and quartz, of which the content of montmorillonite is 92%, and its XRD diffraction pattern is shown in the attached Figure 5 According to the soil-water ratio of 1:8, pulp in the pulping machine and pass through a 180-mesh sieve to remove large particles of impurities, and then enter the slurry into the MBP80 type peeling machine for ultra-fine peeling. The specific gravity of the grinding medium selected in the peeling machine is 4.2 , the particle size distribution of the ultrafine slurry 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 crushed to obtain high-purity ultrafine montmorillonite, its XRD diffraction pattern is shown in the attached Figure 6 .
[0039] From attached Figure 6 It c...
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