Mixing is one of the most common industrial processes practiced in many industries including chemicals, plastics, metals, minerals, food processing, etc. Industrial mixers often play a vital role in handling difficult materials even when in large quantities. With the market having an overflowing number of industrial machineries to choose from, looking for the right equipment may seem to be overwhelming. In this article, we will discuss the main factors to consider to choosing the right mixer.
To narrow down the options, here are the things to remember when deciding which industrial mixer matches your needs.
Determine the container capacity. Explore the batch height, the tank’s height and the diameter of your target mixing vessel. This means that you should identify if your mixing equipment is capable of handling your desired volume of materials.
Identify the type of Liquid Viscosity you’re using. Different kinds of liquids show different characteristics when force is applied. When it comes to selecting a mixer, it is important to properly classify the types of liquids that will be used in your application, as well as the viscosity. Below are the 4 most common behaviors of liquid:
- Thixotropic Liquids- These liquid’s viscosity decreases when agitation increases. Example includes peanut butter, inks, glue, shortening, tars, and soaps.
- Dilatant Liquids: Viscosity of the fluid increases when shear is applied. For example: candy compounds, clay, and slurries.
- Pseudoplastic Liquids: This is the opposite of dilatant; the more shear applied, the less viscous it becomes. Common pseudoplastic liquids include ketchup, paints, latex, gels and lotions.
- Newtonian Liquids: Regardless of mixing speed, a Newtonian fluid’s viscosity remains constant. These fluids have a linear relationship between viscosity and shear stress. May include hydrocarbons, mineral oils, and water.
Measure your torque requirements. With the type of liquids you’ll be working with in mind, consider the amount of rotational force needed for your mixer's motor. This is typically measured in in lbs. or ounces.
The efficiency of the motor in your mixer which can be expressed by:
- hp = (in-oz x rpm)/1,008,400
RPM & Impeller Size. This is important since a slight adjustment in the diameter of the impeller can affect the required power for mixing dramatically. This is derived by using this formula:
- Power = rpm3 x dia5 (rpm to the 3rd power times diameter to the 5th power)
Know which type of power supply works best for you. Determine which type of mixer is electrically safe or practical in your work area.
When considering the use of an industrial mixer, knowing what you'll need and you'll be using it with, is extremely important. It also pays to talk to some experts to prevent costly mistakes and unexpected mixing results. With proper guidance, you'll eventually find out that choosing the right equipment isn't difficult as you initially thought it would be. For more information, call one of our sales associates at 1888IMBOTEC.
Contributed by Gus Gadea