Dry drum magnetic separators are used where is it not desirable to add the solids into water, for various reasons. Again, there are two types, for highly magnetic material and for para-magnetic material. The low intensity drum has a magnetic field from 600 to 1,000 gauss, typically. The high intensity drum typically has magnetic field intensity ranging from 7,000 gauss (Permanent Drum) to 20,000 gauss (Electro-magnetic drums).
We have a full range of small (lab and pilot plant scale), magnetic separators, and a few suited for small scale production.