We are erecting a viscosity index improver kettle in which we are going to heat base oil (5 to 11 cst) up to 160 degrees centigrade to mix with polymer. The product final viscosity will be 1,400 to 3,000 cst at 100 degrees centigrade. The size of the kettle: 1.9 diameter and is 2.75 meters in height. The mixing will be through agitator of 4 blades of (750X10mm) of approx 45 degrees. How much RPM should we use? Is a 15 HP motor is sufficient?
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Dave Dickey Forum Moderator 282 Posts
Re: Can you suggest motor speed and RPM for a viscosity index improver kettle?26 May 2010 at 1:29pmA mixer with a 750 mm diameter pitched-blade turbine operating at 70 rpm will provide intense mixing (in a baffled tank) at the low viscosity and moderately intense mixing at the high viscosity. A 5 hp motor is sufficient for mixer operation at 70 rpm.