How to Select a Drum Type Magnetic Separator?

Before purchasing a magnetic drum separator, the following information should be evaluated.
Material
What material will be processed?
Capacity
What is the required throughput in kg/hr or tonnes/hr?
Particle Size
What is the minimum and maximum particle size?
Magnetic Contamination
What type of magnetic material needs to be removed or recovered?
Moisture
Is the material dry, damp or in slurry form?
Separation Objective
Is the purpose:
Contamination removal?
Magnetic recovery?
Product purification?
Equipment protection?
Required Purity
What is the desired final product quality?
Installation
Will the separator be installed:
Under a hopper?
At a conveyor discharge?
Before a crusher?
Before a mill?
In a mineral-processing line?
Number of Stages
Is one separation stage sufficient, or is multiple-stage separation required?