Abstract:
A sludge or slurry physical stabilizing method combines coarse particles with a slurry of fine particles to generate a composite slurry having a substantially predetermined ratio of coarse particles to fine particles. The composite slurry can then be diluted, flocculated and dewatered. Superabsorbent polymer (SAP) is mixed in with the dewatered composite slurry in an amount effective to produce a somewhat friable, semi-solid conveyable composition of sufficient strength to enable transport, stacking and support of restored overburden at a mining site.
Abstract:
In a feed dilution system and method for a thickener or settling tank, a feed pipe nozzle has an outlet opening or orifice configured to generate an initial stream of slurry. The stream flows from the feed pipe into an upstream end of a mixing conduit wherein the stream is directed transversely to the mixing conduit to enhance entrainment of dilution fluid flow into the slurry stream; thus producing a substantially uniform solids concentration across a stream flowing from the mixing conduit into the feedwell. The outlet opening is generally shaped asymmetrically towards a side of the mixing conduit transversly to the mixing conduit so as to bias the initial stream o slurry.
Abstract:
In a feed dilution system and method for a thickener or settling tank, a feed pipe nozzle has a variable orifice configured to provide an infeed slurry flow stream of substantially constant velocity. The feed pipe orifice is disposed in a mixing conduit proximate an upstream end thereof, while a downstream end of the mixing conduit is functionally attached to a feedwell inside the thickener or settling tank, so that the mixing conduit communicates with the feedwell. Where a diluting liquid is introduced into the mixing conduit, the variable-orifice nozzle ensures a substantially uniform degree of dilution of the influent slurry feed stream by the diluting liquid.
Abstract:
A rake assembly 100 for a thickener/clarifier may comprise a rake support assembly 80; a first arm 10; a fifth arm 11; a second arm 12; and a sixth arm 13 each extending radially outwardly from the rake support assembly 80. A first spiral-shaped curvilinear plow 40 and a second spiral-shaped curvilinear plow 42 may extend radially outwardly away from the rake support assembly 80 in a curvilinear fashion. A distal end portion (B) of the first spiral-shaped curvilinear plow 40 may be connected to the distal end portion (B) of the first arm 10, and the proximal end portion (A) of the first spiral-shaped curvilinear plow 40 may be connected to the rake support assembly 80.
Abstract:
A system and method for tailings disposal is disclosed. A coarse tailings feed stream and a coarse tailings crusher for crushing the coarse tailings feed stream is provided. A crushed coarse tailings stream may be produced by the coarse tailings crusher, and a disposal stream comprising the crushed coarse tailings stream may be discarded as geotechnically stable waste product. The system and method may further provide a fine tailings stream and a thickener configured to thicken/dewater the fine tailings stream and produce a thickener underflow fine tailings stream. The system and method may provide a mixer configured to mix the thickener underflow fine tailings stream and the crushed coarse tailings stream to form a combined tailings disposal stream. Dewatering apparatus may also be provided.
Abstract:
In a feed dilution system and method for a thickener or settling tank, a feed pipe nozzle has an outlet opening or orifice configured to generate an initial stream of slurry. The stream flows from the feed pipe into an upstream end of a mixing conduit wherein the stream is directed transversely to the mixing conduit to enhance entrainment of dilution fluid flow into the slurry stream; thus producing a substantially uniform solids concentration across a stream flowing from the mixing conduit into the feedwell. The outlet opening is generally shaped asymmetrically towards a side of the mixing conduit transversly to the mixing conduit so as to bias the initial stream o slurry.
Abstract:
A sludge or slurry physical stabilizing method combines coarse particles with a slurry of fine particles to generate a composite slurry having a substantially predetermined ratio of coarse particles to fine particles. The composite slurry can then be diluted, flocculated and dewatered. Superabsorbent polymer (SAP) is mixed in with the dewatered composite slurry in an amount effective to produce a somewhat friable, semi-solid conveyable composition of sufficient strength to enable transport, stacking and support of restored overburden at a mining site.