Portable particulate grader

A portable particulate grader, comprising:

• a grader body assembly comprising:
• an upper housing comprising side portions;
• a plurality of springs disposed on an inner portion of the upper housing and configured to hold a grader tray assembly in a descending angle toward a first side in a range of from 5 to 45 degrees, and provide vibrations to the grader tray assembly;
• a lower chute comprising a bottom portion and side portions, and located immediately below the upper housing;
• a dust control gate provided on a second side of the side portions of the lower chute;
• and
• wheels disposed on the grader body assembly;
• and
• the grader tray assembly comprising:
• a grader tray frame;
• a detachable mesh disposed on the grader tray frame to filter an input material;
• an upper chute located on a first side of the grader tray assembly;
• and
• a residual control gate located between the detachable mesh and the upper chute,
• wherein:
• the grader tray assembly is configured to be detachable from the grader body assembly,
• the upper housing, the lower chute and the grader tray assembly are configured to provide an enclosed space to prevent emission of a filtered material, and
• the portable particulate grader does not comprise an electrically-operated component.