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wholesale fashion jewelry san antonio tx Say a relatively old, but very stable craftsmanship.
The dissolution of sulfuric acid: concentrated sulfuric acid (depending on the situation, generally about 50%, if it is too low to dissolve, it is not good, too much waste), add CPU (preferably smashed smashed shatter ), Heated to 90 degrees and stay for 2 hours. This step can dissolve most of the metal into sulfate. Dilute water with water (be careful if you do it yourself, this step is dangerous), filter, retain the solid.
The oxidation immersion: Configuration of immersion liquid (HNO3 volume score of 30%, NACL mass score of 20%, KMNO4 mass score 5%) according to the liquid solid ratio of 5: 1, then the closed system was heated to 90 degrees, heating 4- 4- 5 hours, until the solid is no longer dissolved. (Pay attention to the system seal, otherwise there will be acidic gas overflow, at the same time, the amount of water decreases, and affects the income). Filter, collect liquid (including golden liquid), remove acid in heating liquid (remember to collect tail gas), filter again, and collect liquid.
The restore: Use NaOH to adjust the pH value of about 7, add ammonia water to adjust the pH value greater than 9, and slowly add aquatic pheasant (otherwise it will produce a large amount of bubbles, which will cause the solution to overflow. Solid (that solid is called sponge gold). Filter, wash solids with concentrated nitric acid, purify water, and dry the solid.
This melting: Add a certain amount of pupa, add a certain amount of borax (aid fusion, can also be removed, and will not be mixed in gold, rest assured.), the Marve furnace program is warmed to about 1300 ° C, to the melting, to be fused After no impurities on the surface of the object, pour the iron mold and cool down. rn不考虑硫酸的话，成本大概在0.15元/g以内，纯度在99.7%以上（一般能到99.9%），至于收率，影响因素太多，工厂级的一般在99%以上，不过The CPU is not used, and the specific situation is not clear.
It, some of them are easy to make drugs, so personal purchase is unrealistic.
wholesale jewelry memphis tn Generally refining metal is the method of firing chemistry. Specifically, find it online. I heard that it takes a lot. It is only 100 grams.
jewelry wholesale pinellas county Pay content for time limit to check for freenAnswer Hello, I have seen your question. I am sorting out the answer, please wait a while ~n1. The nitric acid separation method can use the nitric acid separation method, pour the thick nitric acid into the cup, and put the metal that needs to be refined into the cup. After that, the cup is placed on the cup frame, and at the same time heated it with alcohol lamps, and then you can get pieces of gold. 2. Wang Shui separation method can also use the Wang Shui separation method to refine the gold. After configured a part of nitric acid and three copies of hydrochloric acid into Wang Shui, put the metal that needs to be refined into the king water, and filter it after the metal reaction is over. Then heated it, and finally put it in the copper piece for replacement, which can also be refined. 3. The sulfuric acid hydration separation method mixes sulfuric acid and hydrogen peroxide in a ratio of one to one, and then puts the technology that needs to be refined into the sulfuric acid hydraulic solution. After the metal reaction is over, the yellow metal object obtained is gold. Gold -refined raw materials were previously refined by gold. The raw materials were mainly derived from gold ore. The gold -containing ore mined from gold mines also contains other precious metals. As we all know, the application of gold is quite wide. Electronic components, jewelry, batteries, medical films, lines, etc. are very widely used. Therefore, electronic garbage and jewelry waste can also refine gold and other precious metals. Gold refining is a batch of gold mud or coyral goldnCan you go to you to learn gold refining technology?nI am in Heilongjiang, can I go to you to learn gold refining technology?nAnswernCan I communicate during the day?nAnswernCan I send the phone number?nAnswer we have no right to send the phonenJust send it to usnAsk you, where are you from?nAnswer JiangxinQuestion not to send a contact numbern回n12 morenBleak
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