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US 11,786,908 B1Granted
Autogenous impact mill that reduces size of friable material
OwnerAlvin A. Snaperinventor
Life of this patent
Estimating the term…
Abstract
An autogenous impact mill (10) is operative to size reduce friable material particles processed through operation of the mill. At least one impeller (58) rotatable within an interior area (44) of a housing (12) of the mill is operative to produce one or more air jets. The air jets are operative to suspend material particles using the Coanda Effect. Other particles moved by the air jets bounce off ricochet bars (74) and impact suspended particles so as to break and reduce the particles to a suitable size to pass through a screen (110) to an outlet opening (42).
Claims22
A method comprising:
- a) receiving pieces of material to be size reduced into an interior area of a housing of an autogenous impact mill,
- b) producing an air flow jet within the interior area,
- c) holding particles of the received pieces of material suspended in air adjacent to the air flow jet in the interior area via a Coanda Effect,
- d) concurrently while the particles are held suspended in air during step (c), propelling other particles of the received pieces of material that are not currently held suspended in air via the Coanda Effect, into ricochet bars in the interior area, wherein at least some particles ricochet from the ricochet bars into impacting engagement with the particles that are currently being held suspended in air via the Coanda Effect, wherein the impacting engagement of the particles breaks at least some particles causing them to be sized reduced,
- e) passing the size reduced particles out of the interior area through an exit opening.
2 more elements
The method according to claim
- and further comprising:
- concurrently with at least a portion of step (c), electrostatically repelling at least some particles not currently held suspended via the Coanda Effect, away from a surface bounding the interior area of the housing.
A method comprising:
- a) producing an air flow jet within an interior area of a housing of an autogenous impact mill containing pieces of friable material,
- b) holding particles of the material suspended in air adjacent to the air flow jet in the interior area via a Coanda Effect,
- c) concurrently while the particles are held suspended in air during step (b), propelling other particles of the material that are not currently held suspended in air via the Coanda Effect, into at least one ricochet surface within the interior area, wherein at least some particles ricochet from the at least one ricochet surface into impacting engagement with the particles that are currently being held suspended in air via the Coanda Effect, wherein the impacting engagement of the particles breaks at least some of the particles into smaller particles,
- d) passing particles that have been reduced to below a certain size out of the interior area.
1 more element
Dependencies are inferred from the claim text.