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Process of Alluvial Gold Mining Method

2019-11-12(15:40:41) 4942 0

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In this post you're going to know about Process of Alluvial Gold Mining Method in Gravity Separation.

This guide includes:

  • Pre-separation

  • Gravity separation

  • Dewatering 

So if you want to learn how to do allvial gold mining, you'll love this post. 

Let's dive right in!

Alluvial gold is a kind of gold ore produced in the bottom or low-lying areas of rivers, mixed with stone sand that can be washed out. Artificial gold panning is a common gold mining method for alluvial gold, but with the development of mineral processing technology, the alluvial gold mining method has become diversified, the type of alluvial gold mining equipment has also increased.

Alluvial gold shaking table

The shape of raw ore, the amount of mud and the shape of gravel are the three factors that affect the selection of alluvial gold mining method and equipment. The most commonly used alluvial gold mining methods are gravity separation method, froth flotation method, amalgamation method. Among them, gravity separation method is the main method used in the alluvial gold mining, which is also proved to be an effective and economical alluvial gold mining method.

Alluvial gold mining method and equipment in the gravity separation process:

1. Pre-separation:

Compared with other ore processing, the pre-separation before the alluvial gold mining is not complicated. It is mainly to remove the mud from alluvial gold ore or make the grain size meet the requirements of separation operation. The content of alluvial gold in the ore is very low, so in order to extract the gold from the ore, the ore needs to be crushed and ground first, and then the the gold is pre-enriched or separated from the ore by the beneficiation method. Generally, the alluvial gold mining concentrator mostly uses jaw crusher for coarse crushing and cone crusher for medium crushing.

2. Separation - gravity separation:

The principle of gravity separation used for the alluvial gold mining is to separate the gold concentrate from other minerals according to the different ore weight in the original ore. The first step of the gravity process is desliming, which removes the dirt from the mineral. The second step is to screen the larger stones and remove them by the vibrating screen. The last step is to adopt the method of shaking table and amalgam machine. Other gravity separation equipment used in the gravity separation also include jig, spiral chute and so on.

3. Dewatering:

The concentrate and tailing of alluvial gold mine after the separation often contain a large amount of water, especially the tailing. According to relevant regulations of the State, the tailing shall not be discharged if the water substandard. The tailing dry stacking system can be adopted to greatly reduce the water content of concentrate and tailing, and the discharged water can also be recycled. Generally, the tailing dry stacking equipment includes hydrocyclone, dewatering screen, thickener and so on. For the small alluvial gold mining plant, the dewatering screen can be used as the dewatering equipment.


In addition, there are many other alluvial gold mining methods and equipment, such as CIP process and froth flotation method. According to different types of alluvial gold ore, different  alluvial gold mining equipment shall be applied. The gravity separation method can be used for single alluvial gold ore, the combine process can be used for the alluvial gold ore containing other metals.

Last: 4 Types of Gold Ore Froth Flotation Combined Process

Next: 7 Common Manganese Mining Processes


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