Methods, systems, and devices for separating materials using magnetic and frictional properties

A method for separating a mixture of solid materials, the method comprising:

• supplying a stream of a mixture of solid materials to a surface of a rotating member, the mixture of solid materials comprising different components having different frictional or magnetic properties, the rotating member rotating about an axis that is not perpendicular to the direction of gravity, the surface of the rotating member having a downward slope that is not perpendicular to the axis of rotation;
• and
• collecting a plurality of subgroups of the mixture of solid materials from the surface of the rotating member, each subgroup being defined by the amount of movement of the different components of the mixture of solid materials in a direction perpendicular to the direction of the downward slope due to the rotation of the rotating member.