How is placer gold refined into gold or a clear process?

Methods of extracting gold from placer gold mine: There are two main methods of extracting gold from placer gold mine, one is pyrometallurgy; One is to extract gold by electrolysis. Pyrometallurgical alchemy is to first crush the ore, concentrate it with heavy sand method, and then refine it in the furnace; Electrolytic gold extraction is to dissolve gold in ore with sodium cyanide solution, and then extract gold by electrolysis. With this extraction method, the purity of gold can reach 99.9%.

Primitive gold panning principle:

The chemical properties of gold are very stable and generally do not react with other substances, so most of it exists in sand and gravel in a free state. The density of gold is far greater than that of sand and gravel, nearly ten times that of sand and gravel, so it is not easy to be washed away by water, and it is easier to precipitate.

Therefore, the original method of gold panning is to wash gold-bearing sand with a lot of water. In the process of elutriation, the collision particles of sand and gravel become smaller and smaller, and the gold-bearing sand is enriched in the front section, and then the sand with high gold content in the front section is collected and enriched in the same way. Until the gold content reaches the required grade.

Extended data:

The difference between gold and placer gold:

1, placer gold is a kind of gold and belongs to raw gold.

2. The difference between placer gold and gold mainly lies in purity. The purity of placer gold extracted by elutriation is equivalent to 95 and 96 gold.

Placer gold is cheaper than gold.

4. There are four textures of gold, including gold with different purity, and sand metal is one of gold.

5. Placer gold is different from gold. Placer gold is produced at the bottom of the river and in some low-lying areas. It is washed out by mixing gold with rocks, sand and mud.

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