Extraction of gold from metals

If you are familiar with gold mining, you know that nowadays it is possible to extract gold from electronic components, computer boards, lamps, etc.

The first question that comes to our mind is why gold mining has been considered in all eras? Gold is a yellow and shiny metal, and this type of metal has been considered as the most valuable metal for a long time. Undoubtedly, gold is one of the most beautiful elements among other elements in nature. This element has a metallic finish and is yellow in color. But if it is in the form of a thin streak, it can also be seen in nature in black, red and purple colors. It may be interesting to know that this metal can be found in nature in the form of grains or pieces among rocks, veins and alluvium in pure form and also in solid solution with other elements such as silver (electrum), in the form of a The alloy can be seen with metals such as copper and palladium.
Due to the rarity of this metal, gold has a very high value, and today the extraction of gold from metals has also become very popular. Upon hearing this news, you may have the question of extracting gold from metals such as nickel or copper or other metals. How else is it possible like iron? Therefore, in this article, we will provide comprehensive and complete information by examining the methods of extracting gold from metals.

Various methods of extracting gold from metals

•  Burning electrical boards
•  Use of cyanide solution
•  Using peroxide acid solution
•  Working acid method (nitric acid, hydrochloric acid and sulfuric acid)
•  Use of sodium bisulfate
•  Ghalkari method
•  Biologically
•  Pulverizing electrical boards

Separation of gold from metal parts

Extracting gold from metals such as nickel, copper, and iron is one of the main questions that arise for most people interested in this work. In this method of separation , nitric acid and hydrochloric acid are the most suitable materials for this extraction. Many people use these acids for extraction because gold does not dissolve in this acid and the gold particles are in the form of thin sheets or powder in the acid. remains. Many parts that have been gold plated are separated using acid peroxide solution. In this method, after placing these parts, acid peroxide solution is poured in a bushel and we give time for the base metals to dissolve in the solution and then the existing gold. It remains in solution in the metal.
The reverse plating method is also very important in separating gold from other metals. Sulfuric acid and reverse plating are very effective when the base metal is copper, because with this combination, gold is separated from the surface of the metal and remains in the form of powder at the end of the container.

Chemicals used in gold mining

Extraction of gold from electrical appliances, stones and some metals requires the use of special chemicals, which are very necessary in the extraction process.

Nitric acid: In gold extraction, nitric acid is very useful for dissolving and recovering gold from its separation from metals.

Hydrochloric acid: This acid is less dangerous than nitric acid and is sold in concentrations between 25 and 32. This type of acid is also used in gold and silver extraction.

Stannous chloride: This solution is used to detect metals such as gold and platinum, and compared to other acids, this solution is less dangerous and more reliable.

Sodium carbonate, sodium nitrate: This substance is used in the process of separating and extracting gold from metals. This substance can separate gold impurities from it.

Extracting gold from computer parts

The best way to separate gold from electronic parts such as broken RAMs, computer CPUs, mobile boards or even old graphics cards is done with only 2 completely guaranteed and easy methods. In this section, we will teach the best methods of extracting gold from computer parts, so stay tuned until the end.

Many people believe that extracting gold from computer parts requires huge and high costs, but separating gold from scraps of electronic components is actually collecting gold with the lowest cost, because there are many mobile boards and hard parts in the market. Computer software can be found that have a long life and can be easily obtained with a query.
Since the amount of gold in old boards is more, if a person can find them, he can definitely extract more gold. Having the skill to work with various acids and knowledge of chemistry is very important and effective in this skill.

Training of gold extraction by nitric acid

To begin with, we separate the pieces and put them in a bushel. The size of the pieces may be larger than the bushel. In this case, reduce the sizes. The gold may be in the tip and middle of the piece, so be careful not to throw it away after this. Working with nitric acid, we acidify the parts and give time until the color of the solution turns dark green and gold is separated from the base metals as much as possible so that we have an easier job ahead in the acidification process.

After dissolving the base metals in nitric acid, separate the materials remaining in the acid and wash well with distilled water. We pour the materials separated from the acidification step into a beaker and add hydrochloric acid to them, and little by little add nitric acid to the solution to produce acid and dissolve the remaining metals in the materials, including gold, in the acid.

After making sure that all the metals, including gold, are dissolved in the acid, we must wait until the solution settles, filter the solution with filter paper, and wash the remaining materials with water until all the gold chloride solution is removed. Wash the material.

High heat gold extraction training (gold extraction using sulfuric acid)

In this extraction, a temperature of 200 degrees Celsius is used for parts that contain gold. After separating the plastics, and additional materials, we add some sulfuric acid to the materials and let the waste remain in the sulfuric acid for a few hours, usually after 1 1 to 2 hours is better to separate the acid and reheat the remaining waste to a temperature of 800 degrees Celsius, the aluminum melts at this stage and is removed from the cycle.

To cool down the remaining waste, keep them in a dry and cool place for 2 to 4 hours, then add 10% acetic acid to them and add some flaxseed oil and keep them at a temperature of 40 to 50 degrees Celsius for 24 hours. We maintain

After a day and night, add 35% industrial hydrochloric acid to the solution and after the temperature of the substance reaches 80 to 90 degrees Celsius, we do not touch the solution for 4 to 6 hours and after this time we see that Gold and silver precipitate in the solution. Using a suitable strainer, pass it through the strainer several times and separate the gold deposit from the solution.