A method is provided for removing ultrafine particles from an atomized powder. The method includes contacting the atomized powder with a removal liquid, the atomized powder comprising fine particles and ultrafine particles, wherein contacting the atomized powder with the removal liquid comprises adding energy to a mixture of the atomized powder and the removal liquid to detach the ultrafine particles from the fine particles; and separating the removal liquid and ultrafine particles from the fine particles.

A method is provided for removing ultrafine particles from an atomized powder. The method includes contacting the atomized powder with a removal liquid, the atomized powder comprising fine particles and ultrafine particles, wherein contacting the atomized powder with the removal liquid comprises adding energy to a mixture of the atomized powder and the removal liquid to detach the ultrafine particles from the fine particles; and separating the removal liquid and ultrafine particles from the fine particles.

The invention provides a novel filtration apparatus for the selective separation of metals from a mixture thereof. The invention also provides a method for the separation and isolation of metals from a sample using electrochemical precipitation.

The invention provides a novel filtration apparatus for the selective separation of metals from a mixture thereof. The invention also provides a method for the separation and isolation of metals from a sample using electrochemical precipitation.

An assembly and method for gravitationally separating gold from particles, and specifically for separating small components of gold, less than 1 millimeter from small particles. A series of sieves having graduated mesh sizes, and arranged in a sequential, stacked configuration sieves the aggregate of large particles and larger components of gold. The remaining small particles and smaller components of gold fall into a container. A pressurized column of fluid is forced into the container. The fluid has sufficient flow velocity to suspend the lighter small particles, but insufficient flow velocity to support the denser, high specific gravity gold. Gold has a large specific gravity relative to the fluid and particles. Gravity causes the gold to falls into a transparent collection conduit. Manipulation of valves enables gold to redirect to a collection bin. Fluid flow is shut, enabling small particles to be flushed out through gravitational forces and excess fluid momentum.

An assembly and method for gravitationally separating gold from particles, and specifically for separating small components of gold, less than 1 millimeter from small particles. A series of sieves having graduated mesh sizes, and arranged in a sequential, stacked configuration sieves the aggregate of large particles and larger components of gold. The remaining small particles and smaller components of gold fall into a container. A pressurized column of fluid is forced into the container. The fluid has sufficient flow velocity to suspend the lighter small particles, but insufficient flow velocity to support the denser, high specific gravity gold. Gold has a large specific gravity relative to the fluid and particles. Gravity causes the gold to falls into a transparent collection conduit. Manipulation of valves enables gold to redirect to a collection bin. Fluid flow is shut, enabling small particles to be flushed out through gravitational forces and excess fluid momentum.

A fluidized aggregation separation system including an intake assembly having a first and a second end, and a separation assembly configured to separate material larger than a predetermined size from material smaller than the predetermined size. The separation assembly includes a screen assembly configured to prevent the material larger than the predetermined size from passing through the screen assembly and to allow the material smaller than the predetermined size to pass through the screen assembly. The fluidized aggregation separation system also includes an exit assembly configured to direct the material smaller than the predetermined size towards a restoration area.

An apparatus for separating solid materials is described, which comprises a channel for receiving a liquid and the materials to be separated, the channel being provided with an agitation surface. Means for directing streams of fluid at the materials to be separated are provided, the streams of fluid urging the materials over and against the agitation surface to separate the materials. Heavier material is urged along the bottom of the channel to an exit under the action of the streams of fluid, and lighter material separated from the heavier material rises to the surface of the liquid. The agitation surface comprises a plurality of formations each extending across at least a portion of the width of the channel, each formation comprising an ascending surface and a descending surface, at least part of the ascending surface having a steeper slope with respect to the base of the channel than the descending surface. It has been found that the shallower descending surface of one formation followed by the steeper ascending surface of the next formation provides an improvement in agitation of the solid materials as they progress down the descending surface and start to progress up the ascending surface, keeps the transition from the descending surface to the ascending surface clear of a build-up of materials, and provides for the lighter materials to be urged upwards at a suitable angle to reach the surface for removal.

The invention relates to a method and a device for grouping fragile floating objects, such as floating fruits, in batches in at least one accumulation channel. An upstream portion (12) of at least one accumulation channel is supplied with objects transported by a hydraulic current as far as a downstream end of the latter provided with a retaining/releasing device for retaining/releasing the objects. The speed of the hydraulic current is adjusted so as to bring about a hydraulic superposition of the objects retained in a superposition zone of the accumulation channel against the retaining/releasing device which is closed so as to retain the objects.

The invention relates to a method and a device for grouping fragile floating objects, such as floating fruits, in batches in at least one accumulation channel. An upstream portion (12) of at least one accumulation channel is supplied with objects transported by a hydraulic current as far as a downstream end of the latter provided with a retaining/releasing device for retaining/releasing the objects. The speed of the hydraulic current is adjusted so as to bring about a hydraulic superposition of the objects retained in a superposition zone of the accumulation channel against the retaining/releasing device which is closed so as to retain the objects.