1, nitric acid separation method can be used to extract goldIn the separation method, the concentrated nitric acid is poured into the beaker, and the metal that needs to be refined into the beaker is put into the beaker. After placing the beaker on a beaker rack and heating it with an alcohol lamp, flaky gold can be obtained.
2, the first step: put these golden fingers in a plastic filter, prepare some hydrochloric acid, a small amount of copper chloride solution, and a small piece of air bubbler through the direct current. Step 2: Put the plastic tube under the filter and put it in the middle position. Step 3: Soak the fingers in a solution of hydrochloric acid and copper.
3, computer chip gold extraction steps: First with 3% hydrogen peroxide and hydrochloric acid preparationA really messy mixture (the color is mainly a mixture of small amounts of chlorine, hypochlorous acid, chlorous acid, etc.). Throw the CPU in, dissolve the other metals from the processor die, and wash the gold off.
4, the gold coating on the waste components is dissolved, and the gold is recovered by iron replacement or sodium sulfite reduction. Acidizing with sulfuric acid and oxidizing with potassium chlorate to regenerate iodine. A new process of electrolytic gold refund has been developed in the Institute of recycling and Utilization of materials. Thiourea and sodium sulfite were used as electrolyte, graphite as cathode plate and gold-plated waste as anode.
5, the chemical method is mainly through the use of chemical reagents2, using a chemical beaker, put the beaker with a circuit board into the appropriate amount of concentrated nitric acid. After dissolving the old mobile phone circuit board, use gauze to filter the solution, and what is not dissolved is gold. Then we use the drying equipment to dry the bottom of the beaker bottle and you can see the gold particles that are extracted.
3, the first step: First of all, take out all the second-hand mobile phones in your home. Step 2: Turn the phone shell open, take out the motherboard, and then pull all the things on the motherboard down. Step 3: Remove all the electronic components on the motherboard, leaving only a complete motherboard on the line.
4. NextThe circuit board of the mobile phone is pulverized with a grinder; Finally, the crushed circuit board is soaked in aqua regia and then filtered to extract gold. Gold is a chemical element, chemical symbol Au, atomic number 79. The first step is to disassemble the phone and remove the circuit board inside.
5, there is gold in the phone. Open the phone cover with a screwdriver and remove the circuit board. Pull everything off the circuit board; Remove all the electronic components on the electronic board with pliers, leaving only the complete electronic version; Other phones do the same. Take out all the used phones you have ready.
1, old mobile phone refining gold steps are as follows: Material preparation: mobile phone, glass jar, nitric acid. Take out all the used phones you have ready. Lift the phone case, take out the motherboard, and then pull all the things off the motherboard. Remove all the electronic components from the motherboard, leaving only a complete motherboard.
2, there is gold in the phone. Open the phone cover with a screwdriver and remove the circuit board. Pull everything off the circuit board; Use a pair of pliers to place the electrons on the electronic boardRemove all the devices, leaving only the complete electronic version; Other phones do the same. Take out all the used phones you have ready.
3, the gold is mainly used for circuit boards and other internal accessories. The gold extraction method in the phone: Open the phone shell with a screwdriver and take out the circuit board. Use the pliers to remove all the electronic components on the electronic board, leaving only the complete electronic version. Smash the mobile phone motherboard, no conditions to smash, break, the smaller the better.
4, first pry open the back cover of the phone, separate the battery, remove the SIM card and storage card, and take out the main that can extract goldBoard spare.
5, the main board can be crushed to refine the metal on the main board, many are electroplated on a thin layer of gold. Generally speaking, the melting point of gold is 1063 ° C, so the average goldsmith will use some high temperature heating methods. For example, using a butane spray gun to melt them. You know, the kind that emits a light blue flame and gets really hot.
6. Hydroquinone was used to control the reduction end point. The leaching residue is reduced with sodium carbonate, the gold and silver alloy is decomposed with nitric acid, and the silver is replaced with zinc powder. The method eliminates the electrolytic process, has simple production process, short production cycle, less investment and pure silver contentHigh degree, special manufacturing for the production of gold and silver with placer gold, vein gold small and medium-sized enterprises.
2, the use of concentrated nitric acid is of course faster, but also more dangerous, toPrevent the solution from sputtering. After soaking in dilute nitric acid for 1-2 weeks, the solution turns dark blue completely, the copper and silver have been dissolved, but the gold remains on the CPU die. The CPU pulled out of the nitric acid solution, the pins are almost gone.
3, the powder in the reciprocal container after high temperature, you get a small piece of gold. After weighing it, we found that the gold actually had 7 grams, and after weighing it, we knew that the computer could actually extract gold. No wonder some friends say that garbage collectors are local rich.
4, the extraction of gold in electronic equipment is mainly divided into two steps, which need to be correspondingTools and equipment. The first step is to separate or cut the metal parts of electronic devices such as circuit boards and chips, requiring corresponding tools such as hammers, files, saws, etc.
The circuit board is coated with a thin layer of gold film when etching the circuit, which is to use the corrosion resistance of gold, but this layer of gold film is very, very little.
In the production of circuit boards, in order not to let the copper surface of the circuit board be oxidized by the air, so in the place of copper exposure to do the process, that is, OSP, spray tin, gold extraction is to do joaquin and gold deposition process, through chemical principles to make trace gold and copper surface combined to prevent oxidation, of course, this process is also very expensive.
All use of gold, mainly because of the good physical ductility of gold, chemical stability. First of all, gold is the most malleable metal and can be pressed into extremely thin gold foil or drawn into extremely fine gold wire.
Some boards can extract gold, but not allThere's real money in circuit boards. Circuit board extraction of gold, on the one hand, the PCB needs to have a gold sinking process, such as gold fingers, aerospace, high-frequency equipment, communication equipment and other PCB content is higher.
Non-metallic substances are mainly printed circuit board materials, etc., usually removed in the form of scum, while precious metals and other metallic substances are discharged in an alloy state before refining or electrolytic treatment. The improved process mainly includes incineration smelting process, high temperature oxidation smelting process, scum process, electric arc furnace sintering process, etc.