Application

Gold ore mining process and processing equipments

Gold Ore Benefication Gold Ore Crushing & Grinding

Gold ore processing flow for gold processing plant

Usually, gold ore has very low content of gold. In order to extract gold from its ore, you will need our high quality gold ore processing equipments for your gold processing plant.

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Gold Ore Dressing Crushing Grinding Gold Ore Dressing Crushing Grinding Gold Ore Dressing Crushing Grinding
Gold Ore Dressing

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Gold Mining Details

Brief Introduction of Gold Ore Processing Flow

Gold Ore Processing
NO. Equipment NO. Equipment NO. Equipment
1 Gyratory crusher 2 Conveyer The major coveying equipment for gold ore transport. 3 Stockpile
4 Lime feed system The major Feeding machine for gold primary crushing. 5 Primary cyclones 6 SAG mill
7 Ball Mill The major Grinding equipment for gold Grinding. 8 Secondary cyclone 9 Trash screen The major screening equipment for gold ore screening.
10 Leach and CIL tanks 11 Carbon safety screen 12 Tailings dam
13 Hydrochloric acid 14 Loaded-carbon recovery screen 15 Acid wash and water rinse tank
16 Stripping column 17 Sodium cyanide 18 Carbon regeneration kiln
19 Stripped carbon 20 Eluate tank 21 Electrowining cells
22 Electrorefining cells 23 Remelt furnace 24 Dore bullion bar

Primary, secondary crushing, and Grinding of gold ore to reduce the ore down to a fine particle size

During gold ore processing, gold ore is stockpiled at the gold processing plant. It is firstly fed into a hopper with a loader, and then is conveyed by belt conveyor to jaw crusher for primary crushing and then to cone crusher for secondary crushing while lime is adrock into it to raise the pH of the ore. After primary crushing, the gold ore is fed into the SAG mill along with water, and then convoyed to ball mill for further Grinding which reduces the gold ore to slurry.

The slurry fine enough passes through the trammel to primary hydrocyclone which uses centrifugal and gravitational forces to classify the rock particles accorrock their size. The fine particles will be pumped to a secondary hydrocyclone, while the larger ones return to the SAG mill for reGrinding.

80% of the gold ore particles of the obtained slurry after the process are less than 70 microns in size, which is required for gold liberation. It passes through the thickener to remove some of the water, and the moves into the leaching circuit.

Leaching and absorption of ground ore slurry to extract the precious metals from the rock

The slurry of ground ore and lime passes into a series of leach tanks added of sodium cyanide solution which dissolves gold. The obtained slurry moves into a series of carbon absorption tanks. Carbon is heated to 600 degrees C and fed through the tanks to remove the gold from the solution.

The tailings – the barren slurry out the tanks, is pumped to the tailings storage dam. The carbon which has absorbed gold is pumped to the eluate tank to wash off the gold with superheated water. The washed solution, namely pregnant eluate, is passed to the electrowinning circuit.

Electrowinning and electrorefining circuit for precious metals recovery to produce doré bullion bars

The pregnant eluate moves to a series of electrowining cells which contain cathodes to attract gold from the slurry. The cathodes are then rinsed, yielrock a muddy sludge. The powder obtained after drying the muddy sludge is mixed with fluxes and put into the remelt furnace. After several hours of heating, the molten material is poured into a cascade of moulds to produce doré bullion bars.

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