How to purify 999 silver from scrape?-999 silver refining-Adamjewellery
Step by step procedure to refine 999 silver from scrape and silver alloy scrapes
In this video we are going to show you the full process of silver purification and refining, it will take more than 10 hours of regular practice to complete the whole process for refining the silver dust and silver alloy scrape and converting in to 999 fine pure silver in the purity of 99.99%. Similarly the same technique can be used to recover silver used in gold refining process as silver is used in 50% quantity in gold refining.
The silver alloys are composed of various metals like copper, Zink and tin etc. To extract the pure silver we used Hcl and NaOH instead of copper plate. The pure silver start settling in the bottom in the form of Silver chloride and later silver oxide from the silver nitrate solution with reaction of Hcl and NaOH.
The same technique may be used for gold refining by using Nitric and Hcl in different proportion and form to dissolve the gold, like silver in nitric acid.
XRF Machine has been used in the Lab to check purity of the refined silver which has been extracted at 99.95%.
Acids and Chemicals used in the refining process:
01- Nitric Acid (HNO3)
02- Hydrochloric Acid (Hcl)
03- Caustic Soda (NaOH)
04- Dextrose (C6H12O6)
05- DI Water
06- Borosil Beakers
07- Glass Stirrer rod
08- Hot Plate
09- Open Space for Process
10- Face Mask and Safety Goggles
11- Water Spray Bottle
12- PH Pater Strips-Litmus Paper Strip
13- Metal melting Furnace
14- Borax
15- Metal Ingot Mold
16- Graphite Rod
17- Steel Pan for Burning Silver Dust
18- Nyodim Magnet for cleaning Iron from silver dust
Procedure of Silver Refining:
01- Clean and separate silver dust from iron and silver scrape
02- Weigh the silver dust and silver scrape
03- Burn the silver dust on steel pan under fire
04- Wash the burned silver dist with water thoroughly
05- Dry the cleaned dust
06- Weigh the silver dust and scrape
07- Load the Nitric acid in to Borosil beaker
08- Load the silver dust and scrape slowly in to beaker
09- Heat and stir the nitric and dust solution
10- Boil for 20 minutes and later keep aside for cooling at room temperature now it has become Silver Nitrate (AgNo3)
11- Add 500Ml DI Water in to Silver nitrate(AgNo3)
12- Check PH Level of the silver nitrate with PH Paper
13- Add HCL in to silver nitrate and keep stirring till white mud Silver Chloride (AgCl)keep generating
14- Now wash it with DI water thoroughly.
19- Add Caustic Soda (NaOH) and convert it in to Silver Oxide (Ag2O)
20- Add Dextrose (C6H12O6) to for pure Silver Oxide (Ag2O)
21- Check PH Level
15- Wash it with DI Water thoroughly
16- Extract Silver Oxide (Ag2O)
17- Dry this Silver Oxide (Ag2O)
18- Melt this Silver Oxide (Ag2O) powder in to Melter
19- Make Ingot of this Silver Oxide (Ag2O) by melting and pouring in Metal ingot mold.
Cautions:
This is to be informed, that we make all our videos under experts presence and guidance for using any dangerous materials and acids. Please never try any action after seeing our videos until you have experts and well equipped manufacturing lab to perform any of the process to make any jewellery product or refining of metals and materials.
This work is done by Adamjewellery Professionals so do not try this at home; we don’t owe any responsibility if anyone perform this action of refining and get any accident. We made this video just for the sake of general information only.
Caution: working with acids could be life taking risk.
Mandatory to use and Follow:
Face Mask
Rubber Gloves
Safety Goggles
First Aid Box
Working in open Space with Good Ventilation
Fumes coming up from the reaction are very dangerous and must use face mask and safety goggles.
Your queries:
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