Mineral Processing

Gold flotation

Flotation is nowadays the best method for the recovery of gold from base metal ores and gold-bearing ores like the PGM(The platinum group metals)  ores, it’s the most cost-effective beneficiation method. Gold flotation process is widely used beneficiation in gold concentrators. It’s used to process fine gold, sulfide gold-containing quartz ore, multi metal gold-containing sulfide ore and carbon-containing ore.

Gold Ore

Gold itself is a rare metal and the average grades for low-grade deposits vary between 3 and 6 ppm. Gold occurs predominantly in native form in silicate veins, alluvial and placer deposits or encapsulated in sulfides. The recovery of gold from gold-bearing ores depends largely on the nature of the deposit.
Other common occurrences of gold are alloys with copper, tellurium, antimony, selenium, platinum group metals and silver. In massive sulphide ores, gold may occur in several of the above forms, which affects flotation recovery.
The flotation of gold-bearing ores is classified according to ore type (gold ore, gold copper ore, gold antimony ores, etc.), because the flotation methods used for the recovery of gold from different ores is vastly different.

Processing Flow

Sulfide Rock Gold Minerals Processing plant

The complete plant mainly includes raw material feeding hopper, chute feeder, primary jaw crusher, fine jaw crusher, vibration screen, belt conveyor, vibration feeder, storage bin, Ball mill, spiral classifier, mixing tank, flotation machine, slurry pump, thickener, disc vacuum filter machine.

Crushing System

Chute feeder is for feeding raw material to primary jaw crusher stably and evenly, can feed 0-300mm stones, if bigger size and capacity, can use grizzly vibration feeder. Then primary jaw crusher crushes the big rock to a smaller size, about 0-80mm. The output sends to a fine jaw crusher to crush again to below 25mm particles. But there still have some +25mm particles, so better send to vibration screen to sieving out 0-25mm go to ball mill grinding system. and +25mm go back to fine crushing again. The feeding size of the ball mill can be smaller, the smaller, the better, grinding efficiency will much higher. So sometimes, will have 3 stages crushers in the crushing system to make a smaller feeding size for the ball mill (0-5mm or 0-8mm or 0-10mm).

Grinding System

The 0-25mm material will firstly go to a storage bin before feeding to the ball mill, so the crushing system can work separated from the grinding system as long as has stock enough 0-25mm in a storage bin. Then feed the 0-25mm material by swing feeder or electromagnetic vibration feeder to ball mill through belt conveyor. The ball mill is for grinding material to small fine powder because flotation process needs 200mesh material, need work together with a spiral classifier to reach 200mesh output from the overflow of classifier, the underflow coarse particles will go back to ball mill grind again, to be closed-circuit. So from this grinding system will get 200mesh slurry.

Flotation System

The 200mesh slurry will be firstly sent to mixing tank by slurry pump, to make sure material is mixed completely, then from mixing tank go to flotation machines, need to add different chemicals in flotation machine to separate out different minerals, the flotation process has the primary selection, secondary selection, and final selection, this is for increase minerals gra de to maximum after the process. If need a higher grade, then need to flotate more times. Will get each mineral concentrate ore after flotation system.

Concentrate ore filtering system

After getting the minerals to concentrate ore from the flotation system, for the high-grade minerals, such as copper, Zinc, Lead, Fluorite, use the thickener to concentrate, make higher density, then send to disc vacuum filter machine to filter water, and get more dry concentrate minerals. Then can dry in the sun or by drying machine to get complete dry minerals to concentrate ore.

This setup is sulfide ore flotation process plant, suitable for processing Sulfide rock Gold, Copper, Silver, Zinc, Lead, Fluorite ore, etc.Contact us 

Sulfide Rock Minerals Flotation processing plant
Sulfide Rock Minerals Flotation processing plant
Sulfide Rock Minerals Flotation processing plant

This plant flotation separation efficiency and recovery rate are high, especially effective for fine-grained ores, high-quality concentrates can be obtained, and mineral resources can be fully utilized. 

Processing advantages

  • Our flotation solutions can easily applicate to small and medium scale flotation plants but not only within the gold-mining industry. 
  • Our flotation method is a technique widely used for the recovery of gold from gold-containing copper ores, base metal ores, copper-nickel ores, platinum group ores, and many other ores where other processes are not applicable. 
  • Since JXSC founded 30+ ago, we have accumulated a lot of rich experience in gold flotation processing. And help many customers engineering, design and finally deploy those gold flotation production lines for them.

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