Principle of placer gold mining

Principle: Because of its stable chemical properties, gold generally does not react with other substances, so it exists in the sand in a free state. Under the action of natural weathering, rocks are broken, and finally sand is formed, in which granular sands are buried. Under the scouring and carrying of running water, sand and gold particles move with the water.

They move at different speeds and in different states, so in a certain area of the river bed, a belt rich in gold sands can be formed, which is the gold mining field that people are eager to find. People set up gold panning equipment here, dug river sand into the gold panning bucket, and then pumped the river water to wash away the sand in the bucket. A lot of sand was taken away by the water, leaving only golden gold in the bucket.

For example, the Jinsha River in Sichuan is a famous gold mining area. It is said that a gold mining ship is worth millions, and the lucky gold digger can recover the cost in one month.

Extended data:

The process of pan-boat panning for gold in sand;

Because the density of gold is much higher than that of sand, the sand particles in placer gold mine are carried away by the current under the impact of water, and the gold particles remain in the boat. This is the principle of gold mining in the sand. Because of its stable chemical properties, gold generally does not interact with other substances, so it exists in sand in a free state. Under the action of natural weathering, rocks are broken and eventually sand is formed.

The gold is buried in it. Under the transport of water, sediment and gold particles move with the water, and the movement speed and state are different. Therefore, in a certain area of the river bed, a belt rich in gold sands can be formed, which is the gold mining field that people are eager to find. People set up boats here, dug the river sand into the gold bucket, and then washed away the sand in the bucket with a pump. A lot of sand was taken away by the water, leaving golden gold in the bucket.

The use of boiler boats saves a lot of investment and the production cost is extremely low. In mineral processing, the one-time extraction technology is creatively used and the pot boat is widely used, which greatly saves the production cost. Good results have also been achieved in extracting fine-grained materials by mineral processing equipment such as spreading gold cloth and spreading gold grass on a boat. The recovery rate of gold ore dressing is greatly improved.

Origin:

At the beginning of the 19th century, the United States launched the westward movement to expand to the west, and groups of adventurers pushed to the west coast of the Pacific Ocean. After the news of the discovery of gold mines in California was confirmed, it triggered another wave of immigration. People leave their jobs at hand and flock to San Francisco, trying to realize their dream of gold rush.

The frontier of the United States is constantly advancing from the Mississippi River to the west coast of the Pacific Ocean. 1848, people who went to California discovered a gold mine here, which immediately caused a sensation in the world and quickly formed an unprecedented gold rush, which greatly stimulated the westward movement and the development of the western United States. The gold rush is an important part of the westward movement, just like a bright fragment on a magnificent picture.

References:

Baidu encyclopedia-gold rush