Patel Act (Telfer) gold mine in Western Australia desert southwest of the provincial territory Patterson. The mine is Australia's largest single gold mine. The deposit was discovered in 1972. The reserves announced in 1975 were 3.8 million tons and the gold grade was 9.6g/t. Production started in early 1977. In 10 years, the mine produced about 2 million ounces (1 ounce = 31.1 grams) of gold, making it the most profitable gold mine in Australia. In 1986, ore beneficiation plant processing capacity to 2 million t / a; 1987 Nian mine produced 238,700 ounces of gold, the production cost of $ 244 / oz; built in 1988 heap leach field processing low-grade ore, its capacity of 2 million T / a, is expected to produce 254,000 ounces of gold in 1988, the production cost is 291 US dollars / ounce, it is estimated that the annual output of gold will remain above 250,000 ounces. The raw ore mined from the mine is discharged into the mine bin, and is passed to the first jaw jaw crusher through the plate type feeder and grid sieve. The sieved ore from the sieve is fed onto the jaw crusher product conveyor belt and fed to the screen with the broken product (-150mm). The crushing system has a processing capacity of 500 t/h. The welding neck flange refers to a kind of flange with cone neck and butt welding with cylinder or pipe. It is an integral flange, suitable for high pressure, high temperature or high sealing requirements. Carbon Steel Welding Neck Flange,Carbon Wn Flange,Raised Face Weld Neck Flange,Long Weld Neck Flange Jinan Xintai Forging Co., Ltd , https://www.xtdzflange.com
A large amount of gold mineralization in the Tarfa gold deposit is concentrated in many integrated horizons, called “mineral clustersâ€, whose parent rocks are fairly fine-grained sandstones and siltstones, belonging to the Proterozoic Nina Group.
The expansion of the modern concentrator's production task is to recover gold from gold-bearing ores. The processes include: crushing, grinding, re-election, pre-leaching, charcoal leaching, charcoal desorption, electrowinning and refining (Figure 1). 
The re-election system has two jigs (one production, one spare), one wide bed and one shaker. The cyclone grit is fed into the jig, and the jigging product automatically flows into the washing machine, and the tailings are returned to the ore chute of the ball mill . The bed washing product enters the cone-shaped safe storage tank of the alchemy room, and the bed washing tailings are returned to the ball mill discharge pump pool. In the alchemy room, a conical safety tank periodically drains the shaker. After shaking concentrate nitric acid wash, to remove base metal impurities and then with borax, silica and melted together saltpeter, finally, in the shaft furnace, below 1100 ℃, cast bars. Shaker tailings pump back ball mill. [next]
The epigenetic ore contains a large amount of copper and sulfur, making it impossible to recover gold in existing carbon sequestration systems. Telf uses two methods of re-election and flotation to treat sulfide ore containing a large amount of gold. The concentrate is packaged into bags and transported to a smelter for gold extraction.
After the pre-impregnation of the slurry, it enters the first charcoal dip tank and then flows through the six leaching tanks in the back. The leaching tank is agitated by a mechanical impeller. Add cyanide solution during thick and prepreg. In the carbon leaching stage, charcoal is added from the last tank, and the charcoal is transferred forward by the intermittent impeller pump one by one. The Kambalda type intermediate screen controls the activated carbon in the tank, and the size of the sieve allows the slurry to pass, and the slurry automatically flows to the next tank. However, carbon particles cannot be discharged. The impeller pump periodically delivers the slurry and carbon particles to the next tank. When the activated carbon flows back from the last leaching tank to the first tank, it absorbs more and more gold and finally enters the desorption system.
The slurry in the 7th charcoal dip tank is the final tailings, which contains occasional loss of gold-loaded charcoal, which is recovered by 2 linear sieves. The final tailings under the sieve flows into the pumping pond, and 2 pumps feed the tailings into the tail. Mine pool.
The gold-loaded charcoal in the first carbon immersion tank (uppermost tank) of the carbon leaching system is supplied to the sieve together with the slurry by a batch impeller pump to separate the carbon from the slurry. The slurry returns to the first tank. The water is continuously sprayed on the sieve to rinse the carbon particles. The gold-loaded charcoal is stored in the storage tank for desorption.
The first stage of desorption is to wash the activated carbon in a pickling tower with dilute hydrochloric acid at a low temperature to remove impurities such as calcium and magnesium , so as not to affect its performance, and then rinse with water and enter the desorption tower together with water.
In the desorption column, the charcoal is contacted with a 90 ° C cyanide and caustic soda pre-dip solution (heating and cooling of the solution by boiler and heat exchanger). After 20 minutes of pre-dip, 110 °C hot water flows through the bottom of the tower, allowing the dissolved gold to flow into the two desorption liquid storage tanks. The desorbed liquid is periodically discharged into the electric accumulator by the pump for electrowinning.
The desorbed charcoal is hydraulically conveyed to the kiln-type dewatering screen, and the lower part of the sieve is introduced into the carbon powder sedimentation tank. The regeneration kiln is fed from a feeder and activated at 650 °C. The regenerated charcoal flows from the funnel into the conveyor by its own weight, then is washed with water on the sieve, and the activated carbon is returned to the last tank of the carbon immersion system, and the process of adsorbing gold is resumed.
The added new activated carbon must first enter the friction device, the carbon is stirred in the water, and the edges of the carbon particles are removed to avoid the gold from being carried into the tailings. The new activated carbon after rubbing is fed to the charcoal conveyor.
Low grade gold ore is treated by heap leaching. The mined ore is directly discharged onto a plastic cushion covered with broken rock. The broken rock can prevent the plastic cushion from being damaged during unloading, and the pile is up to 15m.
After the pile is piled up, the pipes and nozzles are laid on the top of the pile, and the cyanide solution is sprayed. The cyanide solution is percolated from top to bottom in the immersion reactor, and directly infiltrates into the rock cushion while leaching gold. The rich liquid flows in the plastic cushion and collects into the rich liquid pool. The immersion spray cyanide solution lasted for 120 days, and the average gold recovery rate was 60%.
The rich liquid is pumped into the adsorption tower for carbon adsorption. The lean liquid in the carbon adsorption tower is adjusted to pH by adding an alkali solution, and then returned to the heap immersion poor liquid pool, and after adding cyanide, it is returned to the immersion heap for spraying.
The gold-loaded charcoal is sent to the charcoal desorption plant, and the gold is precipitated from the charcoal and enters a small volume of high-grade solution, which is pumped into the storage tank and then sent to the electrowinning tank of the alchemy chamber. The gold removal charcoal is returned to the adsorption tower.
Gold is precipitated from the solution onto the stainless steel wool. After 1 week, the steel wool is sent to electric refining. The gold is removed from the steel wool by cyanide and alkali solution and plated on a stainless steel electric refining plate to form a gold foil, which is peeled off from the plate and finally Cast into gold bars or gold ingots.