A method and apparatus for washing and grading sand includes a first grading screen adapted to separate a feed material into a fine fraction and a coarse fraction, the coarse fraction having a greater particle size than the fine fraction. A first fines separation stage including one or more hydrocyclones is adapted to receive the fine fraction entrained in water, downstream of the first grading screen to thereby remove fine contaminants. A first dewatering screen includes a deck adapted to dewater the fine fraction downstream of the first fines separation stage to provide a fine sand product, and a second dewatering screen includes a deck adapted to dewater the coarse fraction downstream of the first grading screen to provide a coarse sand product.

A slurry handling apparatus includes at least one reception hopper includes a base, a rear wall and opposing side walls, and an opening provided in the base. Slurry delivered into the reception hopper from a tanker can pass through the opening in the base, and a respective first dewatering screen having an apertured screening deck is located beneath the at least one reception hopper so that slurry passing through the opening is delivered onto the deck of the respective screen, with undersize material and water passing through the apertures of the deck to be received within a sump, and with oversize material passing over the deck to be discharged from a downstream end of the deck.

A slurry handling apparatus includes at least one reception hopper includes a base, a rear wall and opposing side walls, and an opening provided in the base. Slurry delivered into the reception hopper from a tanker can pass through the opening in the base, and a respective first dewatering screen having an apertured screening deck is located beneath the at least one reception hopper so that slurry passing through the opening is delivered onto the deck of the respective screen, with undersize material and water passing through the apertures of the deck to be received within a sump, and with oversize material passing over the deck to be discharged from a downstream end of the deck.

Aggregate washing systems are described including mechanisms for slurrying, washing and/or dewatering aggregate material.

Aggregate washing systems are described including mechanisms for slurrying, washing and/or dewatering aggregate material.

Described is a conveyor sluice system useful for mining fine particles of target minerals, such as gold, that are difficult to collect and are therefore often discarded. Several conveyor sluice arrangements discussed herein use a textured belt that is wrapped around head and tail pulley rollers. Post hydrocyclone aggregate distributor feeds conveyor sluice slurry onto the textured belt near the head pulley roller. As the conveyor sluice slurry flows down the textured belt surface, concentrated aggregate (rich in target heavy minerals) settles and gets trapped in the belt texture. At least one belt cleaning rinse nozzle aims rinse water at the textured outer surface and sprays the concentrated aggregate out from the belt texture. A concentrate launder collects the rinsed off concentrated aggregate and pumps it to a finishing table where the target minerals are separated and collected.

Described is a conveyor sluice system useful for mining fine particles of target minerals, such as gold, that are difficult to collect and are therefore often discarded. Several conveyor sluice arrangements discussed herein use a textured belt that is wrapped around head and tail pulley rollers. Post hydrocyclone aggregate distributor feeds conveyor sluice slurry onto the textured belt near the head pulley roller. As the conveyor sluice slurry flows down the textured belt surface, concentrated aggregate (rich in target heavy minerals) settles and gets trapped in the belt texture. At least one belt cleaning rinse nozzle aims rinse water at the textured outer surface and sprays the concentrated aggregate out from the belt texture. A concentrate launder collects the rinsed off concentrated aggregate and pumps it to a finishing table where the target minerals are separated and collected.

Hydrocyclones and related apparatus, systems and methods are disclosed for classifying aggregate material. Some embodiments include an inlet head with a spiral inlet having a height and width that vary along the direction of travel of material in the inlet head. Plants incorporating hydrocyclones are disclosed for classifying aggregate material. Some plant embodiments include an overflow container having a weir.

Hydrocyclones and related apparatus, systems and methods are disclosed for classifying aggregate material. Some embodiments include an inlet head with a spiral inlet having a height and width that vary along the direction of travel of material in the inlet head. Plants incorporating hydrocyclones are disclosed for classifying aggregate material. Some plant embodiments include an overflow container having a weir.

A system and method for separating two or more materials, such as a solid from a liquid, or a solid from a slurry, are provided. An exemplary system and method for separating drill cuttings from drilling fluids are provided, as well as a system and method of processing such separated drill cuttings. In another implementation, a system and method is provided for separating gold (or another mineral, element, or solid) from a slurry or liquid that includes mining cuttings.