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wholesale women's fashion jewelry In the first step, first throw the CPU into the nitrate solution, and dissolve the needle foot (the main component of the pin is copper, contains a small amount of silver).
The number of more threw in, you can see that dilute nitric acid slowly turns blue. This is the color of the two -valent copper ion. At the same time nitrogen.
The thick nitric acid is of course faster, but it is also more dangerous. It is necessary to prevent the solution from splashing out.
Plipped with thin nitric acid for 1-2 weeks, the solution completely turned into dark blue, copper and silver have been dissolved, but gold is still left on the CPU DIE.
The CPU taken out of the nitric acid solution, the needle foot was almost gone.
The solution is filtered, and the solution is mainly mixed with nitrate root, copper ions and silver ions.
The sodium chloride (home salt) to the filtrate to precipitate silver ion.
The appearance after completely precipitation
V to prepare a small piece of zinc tablet and hydrochloric acid solution to restore silver chloride into single -quality silver. It should be noted that once the reaction is restored, a large amount of heat will be performed
In the zinc tablet and hydrochloric acid are added to the solution, the zinc or the hydrogen produced by the zinc or it can restore silver chloride, while chlorine chloride at the same time. The silver itself and light will also be decomposed into silver single. It can be seen that a lot of black silver single quality has been precipitated.
filtering, this time we want the filter slag.
of course, for the small particles, black powder silver should be further melted. The oxygen-butane flames are used here
The "silver coins" completed by melting. Metals such as platinum, 钯,。, etc. If you want to improve the purity, you can only rely on better equipment and response conditions, processes, etc.
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cleveland wholesale jewelry Pay content for time limit to check for freenAnswer the first step, we first allocate the gold almighty water in proportion, and then pour the well -equipped gold almed water with the CPU into the glass container. Soon, a layer of gold plating on the CPU is dissolved in the water. (We are not toxic and environmentally friendly, which can be contacted directly by hand, and he will not corrode our skin.) Then we can shake the CPU in the golden water with our hands, so that the golden water to fully dissolves the gold plating on the CPU surface. When you clearly see the layer of yellow gold plating on the surface of the CPU, it has been dissolved in the water, so the first step is completed. 2/3 Step 2, let's pour the golden water in the cup, add a promoter, and then put it in the zinc wire and start replacing the gold in the golden water. After the replacement is completed, we will oxidize the zinc wire. Black, the purifier is added to the purification agent, and the cup is heated. After a period of heating, a kind of earthy is called sponge gold. 3/3 Step 3, pinch the purified sponge gold into a ball shape, sprinkle a little borax, put it in the melting gold cricket and start melting. This is a whole process in the change of zinc wire replacement. The gold refinement technology of zinc filaments is mainly aimed at gold -plated materials. As long as it is a gold -plated waste, we can use it directly to refine gold.nDear, you can refer to this methodn[Bi Xin]nQuestion where can I buy refined gold thingsnAnswer kiss. You can buy it onlinenAsk me, can I add you WeChat? I want to talk about solutionnAnswer dear. We have regulations, it's not possible, I'm really sorryn5 morenBleak
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