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The development of gold ore processing plant

The development of gold ore processing plant

Release time:20 April 2018

Gold ore type existing in nature :

In the nature, the gold ore can be existing in sand or alluvial raw material, this kind gold ore called sand gold or alluvial gold ore, the raw material is with stone, sand, gravel, soil, sticky clay, some times with magnetic iron and other minerals. The gold ore mine site is possible near river, in land , in mountain, or in the bushes,ect. The gold concentrate is visible by eye, usually size can be big nugget+2mm, or gold sand -1mm.

The other type gold ore is hard rock gold ore, the gold is existing in hard rock, such as normal stone, quartz vein above the land, or the rock gold under ground. The rock gold ore is possible to be Oxidized ore and Sulfide ore. Those two different type gold ore processing method is different.

Those two types gold ore as below pictures.

The development of gold ore processing plant
The development of gold ore processing plant

How to find the mine position of gold ore?

The most easy way to find gold on land or underground is by gold detector, this machine is operated by manual, it is very popular to use by small gold miners, they will try to find the gold or other metals underground, then try to dig up the gold ore, then separate out gold by small sluice box and washing machine.

For large scale gold mining, will use other big gold detection machine to fine the exact gold mine position, and blast the rock gold stone out. Then send to next processing plant.

The development of gold ore processing plant

Gold ore world wide distribution:

The gold ore is very rich in Africa, South America, such as Mali, Sudan, Mozambique, Suriname, Ghana, Congo, Zimbabwe, Zambia, Tanzania, Ethiopia, Peru, Chile, Bolivia, Australia, America ,ect.

Different county and different area, the gold ore condition is quite different, so gold ore processing plant is different.  

The development of gold ore processing plant

The traditional gold ore processing plant for alluvial gold and sand are using the gold panning pan and sluice box, this way is mostly used by small miners. For rock gold ore processing plant ,the old way is mixing with mercury after crushing &grinding to small size, then refining the gold from gold amalgamation material by distiller.

But nowadays, due to mercury is harmful for health and environment, government forbid to use mercury. So miners have to find a better environmental way for the gold ore processing plant.

JXSC mine machinery Company in China has more than 30 years professional experience at gold ore processing plant, design full set gold ore process flowchart , provide complete set gold ore processing plant, can send engineer to mine site for equipment installation and commissioning guidance. Have already built many gold ore processing plant in Africa countries. Include:Mali, Sudan, Mozambique, Suriname, Ghana, Congo, Zimbabwe, Zambia, Tanzania, Ethiopia, Peru, Chile, Bolivia, Australia,ect.  

Below are the flowchart description that JXSC Engineer recommend for the alluvial gold and rock gold ore processing plant:

The development of gold ore processing plant
The development of gold ore processing plant

Alluvial gold ore processing plant:

Feeding->washing->sieving->primary separation -> final concentration->refining

Feeding:  has several kinds feeding way, depends on plant and material conditions, can be vibration feeding machine, feeding hopper, belt feeder, wheel loader or excavator feed directly. Usually will make  grizzly bar on vibration feeder or hopper to remove big waste stones firstly.

Washing: it is for washing clean the clay and mud in raw material, most popular used are gold washing trommel scrubber and gold trommel screen

trommel scrubber washing machine is for washing raw material that with many sticky clay, trommel screen is for wash raw material that without much sticky clay.

Sieving: after washing, then sieve out some bigger waste stones ,the under screen slurry will go to next separation machine. This sieving process can use trommel screen or vibration screen or high frequency vibration screen.

Primary concentration: it is for primary gold concentration process, gold centrifugal concentrator and  jig separator are best choice. The concentrate ore discharged from them will send to final concentration machine.

Final Concentration: the concentrate ore from gold jig machine or gold centrifugal concentrator will go to gold shaking table concentration machine for final concentration, can get high purity gold.

Tailing recovery: usually gold sluice box recovery tailings that discharged from gold centrifugal machine. So can get more gold.

Refining: if you need very very high purity gold and need to smelt to gold bar for sale, then can use a gold induction smelting furnace to smelt gold dust to gold bar. Then can sell.

The most effective gold ore processing plant is always as per miners request and gold ore conditions and gold ore processing plant capacity.

Below Some pictures of alluival gold ore processing plant from JXSC Mine machinery factory in China.  

The development of gold ore processing plant
The development of gold ore processing plant

Rock type gold ore processing plant, the flowchart can be as below:

Feeding-> crushing->grinding->primary separation -> final concentration-> upgrading 

The feeding way, primary separation, final concentration and gold refining process are almost the same as above alluvial gold ore processing plant.

Below are the crushing and grinding stage description for rock gold ore processing plant:

Crushing: for crushing the big rock gold stone to smaller size before grinding.

crushers can be rough rock gold jaw crusher, rock gold fine jaw crusher, rock gold cone crusher, rock gold hammer crusher, roller crusher rock gold ore, depends on the rock gold feeding size and process capacity to use which kind crusher.

Grinding: after crush the rock gold stone to smaller size, need to grind to power by rock gold ball mill grinding machine or wet pan mill or other rock gold grinding machine, so the gold concentrate can released out from stone. Then go to gold separation machine and concentration machine.( gold shaking table)

Below Some pictures of rock gold ore processing plant from JXSC Mine machinery factory in China.  

The development of gold ore processing plant8
The development of gold ore processing plant