Thickeningor dewatering may be defined as the removal of a portion of the liquid from a pulp or slime made up of a mixture of finely divided solids and liquids. The early methods ofthickeningemployed plain, flat-bottomed tanks into which the pulp was fed until the tank was full. The solids were then allowed to settle as long as required, the top liquid was decanted, the settled solids were ...
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Historicallythickenerswere introduced to the mining industry in 1905 when the beneficiation of ores by froth flotation was invented in Australia. In 1964 there was a project to reprocess the huge piles of tailings that accumulated over the years and recover the remainingcopper.
In mining, when flotation is finished with the ore, and a final concentrate has been produced, often, both products will go to a concentratethickenerbefore it is dried for shipping. This is a very important step so here we discuss Basic ConcentrateThickenerOperation. For the mine to get its concentrate to the smelter it will have to be transported, by truck, train or ship. To illustrate ...
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Thefrothofcopper-richbubbles at the top of the tank is then skimmed off for further processing. The gangue sinks to the bottom of the tank to be removed or disposed of as mine tailings. The next stage afterfroth flotationis thethickeningstage. Thefrothis poured into large tanks calledthickeners.
Equipmentis owneroperated and includes a large mining truck fleet (240-tonne class), electric rope shovels, supportequipment, and drills. Mining is done predominantly on 12 m benches. The mine operates two pits (North & South Pits) utilizing three CAT electric shovels and 39 CAT 793 haul trucks.
copper production process thickener Copper FlotationChemistry DepartmentElmhurstCollege. Thecopper mineralsand waste rock are separated at the mill usingfroth flotation.Air is blown into the tanks and agitated like a giant blender, producing a foamyout of the bottom of the tanks at the tail end of this process is called "tailings.of the first set offlotation tanksinside the mill building end up in
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Historicallythickenerswere introduced to the mining industry in 1905 when the beneficiation of ores by froth flotation was invented in Australia. In 1964 there was a project to reprocess the huge piles of tailings that accumulated over the years and recover the remainingcopper.
8 MIL (.008 inches thick) 32 gauge: The 8 milcopperis approximately 11 - 12 times thicker than typical household aluminum foil and 1.5 times thicker than the 5 mil. This is a heavy-duty tooling foil. 8 mil can be cut fairly easily with scissors and is still very pliable. It may hold shape a little better than the 5 MIL, but will not bear much weight and will yield to increasing pressure.
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A variation is the traythickenerwhere trays or compartments are placed one on top of the other. Each tray acts as athickenerand the assembly operates in parallel with a common pier or shaft where the rakes are fixed. Clarification takes place in series operation, that is, thethickenerunderflow from the top compartment serves as feed to the lower compartment.
EquipmentDesign There are three main types ofthickeners/clarifiers: bridge support, column support, and traction. In a bridge supportthickener, such as the one shown below, the rakes and drive mechanism are suspended from a bridge that spans the diameter of the tank. They are usually only economical for diameters of fewer than 100 feet.
EIMCO and DorrOliverthickenersare available in both bridgesupported and columnsupported designs. We offer beam or trusstype bridges, depending onthickenerdiameter. In the bridgesupported design, suitable forthickenersup to 50 m in diameter, the drive is supported by the bridge, driving the rakes with a …
EIMCO Water Technologies’ history dates back to the creation of two pioneers and leaders in water and wastewater treatment: The Dorr Co (founded in 1865) and Oliver United Filter (founded in 1915) merged to become Dorr-Oliver. Eastern Iron and Metal Corporation (founded in 1884) renamed EIMCO ProcessEquipmentCompany in the 1930s.
The mine is a multi-pit, multi staged operation mining approximately 100MT of ore and waste per annum and producingcopperconcentrates containing an average of 120,000 tonnes ofcoppermetal per year over a twenty (20) year mine life, making Lumwana the largest single open cutcoppermine in Africa.
