Thursday 16 February 2017

How to Recover Gold from Computer Parts?

I have received a great number of emails today in which people have expressed their desire to know about how to recover gold from computer parts. I thank those who have written to me about it. And I would like to tell them that I have explained this in my recent post on this blog under the title “Recover Gold from Electronic Scrap.”

So read the article of your choice, and please follow my blog and oblige me with your comments if you like that article.
I wish you all the success in your endeavours and thank you for your time!

आपसे निवेदन है कि हमारी पोस्ट को लाइक करें , अपने कमेन्ट्स दें , शेयर करें | 

Tuesday 14 February 2017

Recover Gold from Electronic Scrap

Gold Recovery from Electronic Scrap is a very lucrative business. But you must find out the right source to buy the material. Because there are two things when you start this business. Number one you should choose the right methods to recover all precious metals from electronic waste (E-Waste). Number two- you should be good at purchasing the material also. Being good at only one thing won’t help.
When we say electronic scrap, it is not one single big thing. It is a mixture of either, so many electronic circuit boards or a variety of whole devices. The best thing about it, according to my experience is that you should not process everything. You should be choosy if you want to make more money in a short time. When we talk about precious metal recovery from electronic scrap, it is not every component of the electronic scrap that yields precious metals. There are only particular components where precious metals are used. For example, chips, processors, golden fingers, gold plated connectors, some special diodes and transistors, monolithic ceramic capacitors  and relays etc..
If you happen to buy a mixed lot of electronic scrap, you should first segregate the items. Now one by one take away the above mentioned precious metal bearing components. There are customers for almost everything that you get from e-waste. So, you can sell the rest of the items (Non gold bearing ones) to the e-waste recyclers.
There are tests through which you can determine the presence of different precious metals. For example, if you think that a particular component is silver plated. You can first put a drop of nitric acid on it, and then a drop of hydrochloric acid. If there is silver, either in the form of alloy or polish; there will be curd- like formation on the surface of the metal. For gold, you can put a drop of nitric acid on a component or a piece of metal looking like gold. Gold does not react with nitric acid. It stays as it is. If it is copper or brass etc., nitric acid will react and dissolve the metal. The same way, there are methods for testing palladium and platinum also.
Gold polish can be removed from the components through an AP process. CPU’s/Processors are best treated for gold recovery with aqua regia. Gold can be removed from the pins through sulfuric cell also.
In my next article, we will discuss some precious metal recovery methods in detail.

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CPU-Processor Gold Recovery


CPU gold recovery can be done in many ways. Some people crush the whole CPU into powder and then separate the metals from the powder through density separation. But in my opinion, this is not the best way because you have precious metals lost in it. CPUs contain gold, palladium, silver, etc. People normally think that you get only gold from the processors. It is not true. If you look at them closely, you will see MLCCs on them. MLCCs (Monolithic Ceramic Capacitors) contain palladium, silver, and gold.

So, the best gold recovery method for CPUs and processors is to recover gold through aqua regia. You should first remove MLCCs from the processors and store these small capacitors safely for silver, gold, and palladium recovery in the future when they are in enough quantity. Now break the processors into smaller pieces with a hammer. Prepare the aqua regia solution. The aqua regia solution is one part nitric acid and three parts hydrochloric acid. You should use a heat-resistant glass pot for it. First, put the broken processors into the pot, and now pour some aqua regia into the pot. Aqua regia solution will start dissolving pins, including gold. Do it in an open space or a properly ventilated room, and use safety gear.

Separate the solution from the solids after the reaction has stopped completely. Now you need to neutralise this gold-bearing aqua regia solution. And, for this, you may use urea. Add some urea to the solution, and there will be a lot of fizzing. There will be lots of foam. After some time, the foam will disappear. Again, add some more urea to the solution. The foam will form on the surface and subside quickly. Keep repeating it till the foam starts taking longer to subside. Stop adding urea to the solution when foams take too long to subside. Now your solution is neutralized. Filter this solution and recover your gold with sodium metabisulfite (SMB).




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Wednesday 1 February 2017

How to Recover Silver from Silver Nitrate Solution?

When silver reacts with nitric acid (HNO3) silver nitrate is formed. It is very easy to recover silver metal from silver nitrate (AgNo3). First filter the silver nitrate solution, so that all the unwanted material is removed from it and we get a better quality of silver. Take a plastic pot and pour all the silver nitrate into it. Now start adding HCL (Hydrochloric Acid) to it in small increments. The moment you add HCL to silver nitrate solution, silver starts separating from it in the form of silver chloride. Keep adding HCL to the solution till there is no more silver separating from silver nitrate solution.

Silver chloride (AgCl) is a curd like silver compound in appearance. It precipitates immediately. Give it around half an hour to settle to the bottom completely. Heavier particles settle immediately and lighter ones take some time to go to the bottom. After that, separate the liquid from the silver chloride by tilting the pot. Wash the silver chloride with plain water at least twice. Now dissolve some glucose into the plain water and keep it in a plastic can. Add some quantity of this glucose water to silver chloride. And stir around the silver chloride with some glass rod. Silver chloride will start converting to metallic silver. Keep doing it slowly till all the silver chloride has changed into silver. Now put this silver onto a filter paper or filter cloth so that all the water should filter out of it. You can leave it for a night. By the morning, there will be no or little moisture left in the silver. You can dry it on a lighter flame in a glass pot and melt it.

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Sunday 29 January 2017

How to Recover Gold from GPC Solution Tutorial?

Gold recovery from GPC (Gold Potassium Cyanide) solution is a very profitable business. I am going to give you a very easy process for gold recovery from gold potassium cyanide solution. Gold can be easily recovered from this solution with zinc dust. It is a metal displacement theory.
Heat the solution to around 60 degrees Celsius. You may either use a PVC/Plastic or glass container for it. You can use a glass heater for heating the solution.  Add five to ten grams of (325 mesh) zinc dust per liter. Stir the solution with a glass rod for about five minutes at least five times with a gap of one hour (each time). Leave the solution for a night. But make sure the solution should remain hot throughout the night. Zinc dust will displace all the gold from the solution by the morning. Pour out all the liquid into another container, leaving behind the gold dust.
This gold dust has some zinc impurity in it. So, it needs to be refined. For this, you treat it either with dilute sulfuric or nitric acid for five to ten minutes on a lighter flame. This treatment will produce some smoke. So, use a properly ventilated place for it. During the reaction, bubbles come to the surface and break and give out smoke of green color. It is an indication of the zinc dust being dissolved into the acid. When the gold dust is refined, the bubbles and green smoke stop completely. Wash this refined gold dust with water three to four times. Dry and melt it into a gold button.

Note: I have uploaded a video regarding it on my YouTube channel: https://www.youtube.com/user/uroojmetals
The comments and mails that I receive from people suggest that I am talking about producing GPC (Gold Potassium Cyanide) solution for gold recovery. It is not that. GPC is used in gold plating different materials such as artificial jewelry water taps, door handles and many more things. Some companies don’t recover gold from the spent up cyanide solutions. They prefer to sell it to the outsiders. So, this video is for those who want to make money through GPC by purchasing it from the gold plating plants. You can really make a lot of money by recovering gold from this exhausted GPC solution. Please use safety gear if you do this process.

If you want to discuss some other things with me regarding it, you may send us an email through our website: www.recovercomputergold.com


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Wish you all the success in your endeavors & thanks for your time!