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US 8,042,691 B2Granted
Heavy particle separation
AssigneeIE-TEC Licensing Limited
InventorsRaymond Brian Brosseuk, Greig Oppenheimer
Life of this patent
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Abstract
A method of heavy particle separation, including a primary separation stage which includes the steps of dropping, accumulating, concentrating and discharging of heavy particles and/or a secondary separation stage for concentrating heavy particles which includes the steps of infeeding, stilling and retaining such particles.
Claims33
A method of separating heavy particles from light particles comprising:
- dropping particles onto a transversely operated belt that is moved in a direction transverse to the direction of movement of particulate material;
- accumulating a first group of particles having substantially medium to low density;
- concentrating a second group of particles having substantially medium to high density, concentrating comprising:
- providing a variably adjustable concave profile in the belt, the concave profile being progressively adjustable from a first position wherein the belt is in a fully lowered cross-sectional configuration to a second position wherein the belt is in a fully raised cross-sectional configuration and to positions intermediate between the first position and the second position;
- and
- subjecting the first and second groups of particles to separation in the concave area, each in an opposite direction;
- and
- discharging each of the groups at an opposite end of the belt.
5 more elements
A heavy particle separation apparatus, comprising
- a tiltable transverse belt, the tiltable transverse belt:
- being configured to be moved in a direction transverse to the direction of movement of particulate material;
- being concavely shaped in its central area and having a plurality of idler rollers adjustable in a vertical direction to provide a variable concave profile in the belt;
- the concave profile being progressively adjustable from a first position wherein the belt is in a fully lowered cross-sectional configuration to a second position wherein the belt is in a fully raised cross-sectional configuration and to positions intermediate between the first position and the second position;
- and
- comprising a continuous spiral formation having an effective pitch provided on the belt outer surface;
- the spiral formation being configured to urge material upwardly along the belt;
- a material feeder disposed above the belt;
- a water spray system disposed above the belt;
- and
- exit points for particulate material.
8 more elements
Dependencies are inferred from the claim text.