Gold Refining and Extraction Equipment

According to our understanding, in addition to containing 30% inert oxide and 30% plastic, circuit boards also contain 40% metal, in the metal content of 0.1% of the amount of gold. Like many used computer motherboards, used mobile phones and other electronic equipment, inside the circuit board usually have gold content, like a ton of used circuit boards can be refined at least 40g of gold, of course, in addition to gold, circuit boards also contain many other precious metals, such as silver, etc., the most important of the used circuit boards is the chip off gold processing, can be recycled to refine the precious metals in the circuit board chip, so has a very high The value of recycling

A tonne of used mobile phone circuit boards can be extracted 0.034g gold, 0.34g silver, 25g copper and other metals, while a tonne of ore can only be extracted 20g gold, which shows that the gold content in the waste circuit is still quite large, so how is the gold extracted from the circuit board? At present, the circuit board recycling equipment is a good metal separation equipment, can be the circuit board in the metal and non-metallic substances for separation, and then extracted from the gold.

Process flow:

The electronic components on the circuit board dismantling machine is used first to dismantle the electronic components on the waste circuit board, and the dismantled electronic components can be sold for a second time to achieve the recycling of resources;

Then the waste circuit board into the crusher for crushing, the metal and resin for mixed crushing, in order to avoid the metal and resin powder crushing is not enough, you need to add the equipment in the rotary sieve, crushing screening, not fully separated from the crushed material will be the second crushing;

After ensuring that the metal and resin powder are all crushed, the airflow specific gravity sorter in the circuit board recycling equipment is used for sorting to obtain a high purity metal recovery effect.

The metal can also be extracted from scrap circuit boards by electrolytic separation of copper and then by chemical leaching, which separates the gold from other non-metallic materials and thus extracts the gold.

In addition, pyrometallurgy was the first technology used to extract precious metals from electronic waste and is currently the most used technology for recovering gold from waste appliances. Its principle is the use of high temperature so that the waste appliances containing precious metal parts of non-metallic and metallic substances separated from each other, part of the non-metallic substances into gas escape from the molten system; another part of the floating slag form floating in the upper layer of the molten metal materials. Gold and other precious metals in the molten state and the base metal to form an alloy, remove the surface of the floating slag, the molten alloy into the corresponding mold cooling, and then through refining or electrolytic treatment to make gold and other precious metals and base metal separation, while making gold and other precious metals separated from each other. The most obvious characteristics of the fire process is the process is simple, easy to operate and precious metal with high yield (up to 90% or more).