rotary dryer for bentonite bleaching earth

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Jan 10, 2021 Thermal activation of bentonite - bleaching earth production. A dry and green process (without using any acids as the activating agents) was employed for the production of bleaching earth, which is the thermal-activation of bentonite. Mixtures of GS and SS bentonite were prepared at a certain proportion; that is 1:4, 2:3, 3:2, and 4:1 (GS: SS).

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