This type of application is usually handled with a high-speed disperser mixer. The impeller is usually a saw-tooth disk impeller running at a high speed, 1,000 rpm (17 rps). The recommended impeller diameter is 0.33 m driven by a 25 kW motor. Most such mixers have a hydraulic raising and lowering system to access the vessel and move the impeller location vertically to ensure complete mixing. Such mixers also have a variable speed drive to avoid splashing as the temperature increases and the viscosity decreases.
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