A mining sluice box having a louver processing zone comprising a plurality of louvers positioned perpendicular to the incline slope, with the pitch angle of the louvers being variable so as to permit adjustment of the intensity of a vortex flow between the plurality of louvers by adjusting the pitch angle of the plurality of louvers.

A mining sluice box having a louver processing zone comprising a plurality of louvers positioned perpendicular to the incline slope, with the pitch angle of the louvers being variable so as to permit adjustment of the intensity of a vortex flow between the plurality of louvers by adjusting the pitch angle of the plurality of louvers.

A sluice including an upper channel that includes a material deck and a tilted classification screen. Below the classification screen is a lower cavity located between two longitudinally aligned plenums located under the upper channel. Each plenum includes a front opening and a rear opening and an interior sidewall. Extending between the plenums is a floor plate. Fluidization holes are formed on each interior sidewall. During use, the sluice is positioned in a stream so water flows simultaneously over the upper channel and the through the front openings of the plenums. Water flowing over the upper channel separates mined material placed on the material deck so that small particles fall through the classification screen. The water entering the front openings of the two plenums flows through the plenums and partially exits through the fluidization holes and sprays over the small particles deposited in the lower cavity further separating the fine gold particles from the small particles.

A sluice including an upper channel that includes a material deck and a tilted classification screen. Below the classification screen is a lower cavity located between two longitudinally aligned plenums located under the upper channel. Each plenum includes a front opening and a rear opening and an interior sidewall. Extending between the plenums is a floor plate. Fluidization holes are formed on each interior sidewall. During use, the sluice is positioned in a stream so water flows simultaneously over the upper channel and the through the front openings of the plenums. Water flowing over the upper channel separates mined material placed on the material deck so that small particles fall through the classification screen. The water entering the front openings of the two plenums flows through the plenums and partially exits through the fluidization holes and sprays over the small particles deposited in the lower cavity further separating the fine gold particles from the small particles.

A flow regulation system includes a sluice box that may be positioned adjacent to a fluid source. The sluice box may have a fluid urged therethrough. A regulator is slidably attached to the sluice box such that the regulator selectively restricts a flow of the fluid through the sluice box. The regulator resists being urged by the fluid flowing through the sluice box.

A flow regulation system includes a sluice box that may be positioned adjacent to a fluid source. The sluice box may have a fluid urged therethrough. A regulator is slidably attached to the sluice box such that the regulator selectively restricts a flow of the fluid through the sluice box. The regulator resists being urged by the fluid flowing through the sluice box.

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.

A sluice including an upper channel that includes a material deck and a tilted classification screen. Below the classification screen is a lower cavity located between two longitudinally aligned plenums located under the upper channel. Each plenum includes a front opening and a rear opening and an interior sidewall. Extending between the plenums is a floor plate. Fluidization holes are formed on each interior sidewall. During use, the sluice is positioned in a stream so water flows simultaneously over the upper channel and the through the front openings of the plenums. Water flowing over the upper channel separates mined material placed on the material deck so that small particles fall through the classification screen. The water entering the front openings of the two plenums flows through the plenums and partially exits through the fluidization holes and sprays over the small particles deposited in the lower cavity further separating the fine gold particles from the small particles.

A sluice including an upper channel that includes a material deck and a tilted classification screen. Below the classification screen is a lower cavity located between two longitudinally aligned plenums located under the upper channel. Each plenum includes a front opening and a rear opening and an interior sidewall. Extending between the plenums is a floor plate. Fluidization holes are formed on each interior sidewall. During use, the sluice is positioned in a stream so water flows simultaneously over the upper channel and the through the front openings of the plenums. Water flowing over the upper channel separates mined material placed on the material deck so that small particles fall through the classification screen. The water entering the front openings of the two plenums flows through the plenums and partially exits through the fluidization holes and sprays over the small particles deposited in the lower cavity further separating the fine gold particles from the small particles.

A sluice support for positionally supporting a sluice box within a waterway provides an anchor post, an axially and rotatably movable slide hammer and two adjustably positionable support frames releasably engageable with the slide hammer to adjustably support a sluice box within a waterway.