Seashore placer gold reselection method

Seashore placer gold reselection method

In the mining industry, coastal placer gold is an important mineral resource. However, due to its low gold content, it is necessary to re select it to increase its gold content. This article will introduce the gravity separation method of coastal placer gold, helping mining operators improve their production efficiency.

1、 The characteristics of coastal placer gold

Beach sand gold refers to sand and gravel containing gold in the sand beaches, rivers, and seabed sediments of coastal areas. Its characteristic is that the particles are small, usually between 0.1 millimeters and 1 millimeter, and the gold content is low, usually between 0.5 grams/ton and 5 grams/ton.

2、 Seashore placer gold reselection method

1. Gravity beneficiation method

Gravity beneficiation method is a commonly used method for seaside placer gold concentration. It uses gravity to separate gold bearing sand and stones from worthless minerals. The specific operation steps are as follows:

(1) Crush the beach sand gold into particles of appropriate size.

(2) Separate sand gold of different particle sizes through a vibrating screen after crushing.

(3) Place the separated placer gold into a gravity concentrator for beneficiation. There are many types of gravity concentrators, commonly used including inclined shakers, spiral flotation machines, centrifuges, etc. During beneficiation, gold bearing sandstone and worthless minerals are separated according to different density differences.

(4) Dry and select the separated gold bearing sandstone to obtain high-grade placer gold.

2. Flotation method

Flotation method is a method of using surfactants to separate gold bearing sandstone from worthless minerals. The specific operation steps are as follows:

(1) Crush the sand gold into particles of appropriate size.

(2) Separate sand gold of different particle sizes through a vibrating screen after crushing.

(3) Place the separated sand gold into a flotation machine for flotation. There are many types of flotation machines, commonly used including mechanical flotation machines, air flotation separators, electric flotation machines, etc. During flotation, gold bearing sandstone is mixed with surfactant to make its surface hydrophilic, thus combining with water to form foam, which separates gold bearing sandstone from worthless minerals.

(4) Dry and select the separated gold bearing sandstone to obtain high-grade placer gold.

3、 Advantages and Disadvantages of Seashore Sand Gold Re-selection Method

1. Advantages and disadvantages of gravity beneficiation method

The advantage of gravity beneficiation method is high beneficiation efficiency, which can separate most of the gold bearing sand and stone, simple operation, and low cost. The disadvantage is that the beneficiation effect is greatly influenced by factors such as particle size and density, and requires a high grade of gold bearing sand and stone.

2. Advantages and disadvantages of flotation method

The advantage of flotation method is its good beneficiation effect, which can separate most of the gold bearing sand and stone, and can adapt to different grades and particle sizes of gold bearing sand and stone. The disadvantage is that the operation is complex and the cost is high.

4、 Conclusion

Beach placer gold is an important mineral resource, but its gold content is low and requires re selection. Gravity beneficiation method and flotation method are two commonly used methods for beach placer gold gravity separation. They each have their own advantages and disadvantages, and choosing the appropriate method can improve production efficiency and reduce costs.

Seashore placer gold reselection method