How 999 Pure Gold is Made (Reposted)
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How is 999 pure gold made? February 29, 2008, 11:12:42 jinshu2007 Everyone should be familiar with 999 pure gold. Do you want it? Next, I will introduce the process of refining gold from ore into pure gold. (A glimpse of a gold mine) This shows what mining for gold looks like; gold mines are generally divided into rock-based mines and mud-based mines. http://www.wrmetal.com/Files/newsimg/clip_image002.jpg The ore is excavated from the mountain and transported to the stockpile; the quantity depends on the size of the stockpile. The bottom of the stockpile must be compacted as much as possible, with no stones or other objects present. There should also be at least 2 drainage ditches, and the area should be covered with colored plastic sheeting. Wooden planks and bamboo fences are placed over the drainage ditches before the ore is piled up there. http://www.wrmetal.com/Files/newsimg/2008022911111079669.jpg After the ore is piled up, grass is laid on top, followed by the installation of water pipes and connections. A solution of sodium cyanide and an alkaline solution are used for spraying – the former is used to dissolve the gold molecules in the ore, while the latter prevents those molecules from escaping too quickly. The water containing gold molecules flows through drainage channels into buckets filled with activated carbon; this allows the gold molecules to be absorbed by the carbon. Once all the gold molecules from the ore have been absorbed or the carbon becomes saturated, the carbon is removed and the process moves on to the next stage. http://www.wrmetal.com/Files/newsimg/2008022911191563772.jpg Next is the carbon burning process: the carbon taken out of the carbon barrels is placed in a very large iron pot, and an air blower is used to force air through it, causing the carbon to burn down to ashes. Activated carbon is a type of carbon that is highly resistant to burning; it usually takes about 15 hours for such a batch of carbon to be completely burned. http://www.wrmetal.com/Files/newsimg/2008022911201260903.jpg http://www.wrmetal.com/Files/newsimg/2008022911215879348.jpg http://www.wrmetal.com/Files/newsimg/200802291122105472.jpg After the carbon is burned, residue is left, and the gold is already in that residue; it can be seen. http://www.wrmetal.com/Files/newsimg/2008022911250348271.jpg Those little yellow dots are gold! http://www.wrmetal.com/Files/newsimg/2008022911251417137.jpg After the slag is cooled, it is crushed, and lead oxide (orange-yellow in color) and borax (with a similar color to that salt) are added and mixed thoroughly. http://www.wrmetal.com/Files/newsimg/2008022911252693461.jpg The well-stirred carbon slag is placed in a calcination furnace, where the temperature reaches over 1700 degrees. http://www.wrmetal.com/Files/newsimg/2008022911283933728.jpg After 1-2 hours of heating, the carbon residue turns into a liquid; it can then be stirred like water and taken out of the container. Once it has cooled, the carbon residue can be separated, at which point gold and lead have settled to the bottom of the container, and they can be removed by tapping. http://www.wrmetal.com/Files/newsimg/2008022911290444256.jpg At this point, the carbon residue becomes furnace slag. The cooled slag has a glass-like texture; it can be broken into small pieces and then reheated with pure lead in order to extract as much gold as possible. http://www.wrmetal.com/Files/newsimg/2008022911300218072.jpg This is the lead-containing gold after calcination. http://www.wrmetal.com/Files/newsimg/200802291129438728.jpg The next step is the lead-blowing process: the gold containing lead is placed in a large pot filled with cement, coal balls or coke are placed on top, and air is blown through it using a fan; afterwards, the blowing stops and the temperature rises naturally to over 1300 degrees, at which point the lead vaporizes and evaporates. This process takes 2-3 hours, and the resulting gold purity is generally over 800%. http://www.wrmetal.com/Files/newsimg/2008022912163956657.jpg Gold after lead-blowing. http://www.wrmetal.com/Files/newsimg/2008022912170492698.jpg The purification step follows the lead-removal process: the gold after lead removal is placed in a ceramic pot, and the temperature of the furnace is increased to melt the gold. Then, hexamminesulfururic acid and borax are continuously added to remove impurities from the gold. This process takes more than 1 hour, and purification is repeated until the gold reaches 999 purity. http://www.wrmetal.com/Files/newsimg/200802291217171940.jpg This post was last edited by yutr on 2009-3-23 13:11 ]
Our true nature will be revealed through high-temperature baking! ! :lol
Good, the name is well chosen, and the words spoken are excellent! 1
Alchemy is that simple? There’s no real technological complexity involved. This must be a home-based method for producing 99.9% pure gold
If you happen to pass by, and think it’s good, please give it a rating! ! Only by sharing resources can everyone stay enthusiastic, which also helps to support the development of the forum! ! !
This process flow is unreasonable; it’s a shame to burn the activated carbon!
It’s unreasonable, but it’s simpler than the elution method; each has its own advantages! !
It causes severe damage to the environment; those who wear gold and silver should reflect on this constantly!
Full fire method? With more advanced hydrometallurgical processes, the pollution should also be relatively lower! This method is still too outdated, and the costs are relatively high as well!
In this way, we can also refine gold by ourselves; we can learn how to do it and then go home to refine gold on our own.
Leach mining and pyrometallurgy involve harsh operating conditions; lead fumes cause environmental pollution and are harmful to the health of operators. If the final product is treated with droplet precipitation and then dissolved in aqua regia, followed by reduction with sodium sulfite, 24-karat gold can be obtained.
I learned something new – this is the first time I’ve heard about how gold is refined in this way
I have also refined gold in this way; the latter is exactly the same!
This is a method of refining low-grade ore through leaching, carbon adsorption, and hydroponic cultivation – an ancient technique that is still used in some small, informal mines. The standard leaching methods require much stricter measures to prevent leaks, rain damage, and pollution. The carbon used in this process is typically treated through electrolytic processes, allowing it to be reused. The hydroponic cultivation method has also been replaced by wet-process metallurgy, which enables the direct production of gold meeting national standard No. 1, rather than gold with a purity of 999
Well, there are pictures, which make it more intuitive to understand
:) :) Environmental pollution is too severe
Cyanide and lead vapor too – the pollution is way too high:funk: