I have a 1,000-mm diameter and 1,800-mm high tank. Material to be mixed with an agitator is 76% solid and 24% water (calcium carbonate slurries), with a viscosity of 350-450 cps. I want to use a gearbox for mixing with output speed between 18-36 rpm. How much power (kW) do I need for the gearbox? How many blades must be made in order to make slurries?
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Dave Dickey Forum Moderator 245 Posts
Re: Power requirement for a gearbox23 August 2007 at 1:29pmWith the low speed specified (36 rpm), the best that can be done is to use two pitched-blade turbines (four blades each, at a 45 degree angle). Each pitched-blade turbine needs to be 600 mm in diameter with 150-mm wide blades. The tank should have four wall baffles to prevent swirling and to keep calcium carbonate from accumulating on the bottom. The drive motor needs to be at least 0.25 kW.