We are manufacturer of gold refining plant and supplier of this system in India and all over the world. Being one of the leading manufacturer and exporter of gold refinery plant, we have a huge vendor base who supply high quality raw material for the manufacture of these products.
Keeping in mind the needs and specifications of our clients, we also offer a wide range of these products in various customized forms.
This system shown above is able to treat from 300 gram. to 10 kg. of raw material. You are able to produce 99.99% pure gold (Au) in a single step within a production cycle that can last from 5 to 8 hours, from the preparation of the grains, to obtaining the pure ingot.
The treatment takes place by dissolving the raw metal alloy through the use of the so-called “Aqua Regia” process, an opportunely calibrated mixture of hydrochloric acid (HCl) and nitric acid (HNO3).
The Aqua Regia Process
Our system work on the basis of Aqua Regia Process. In Aqua regia process the Gold (AU) should not be less than 65% and Silver (AG) should not be more than 10%.
The process involves to dissolve gold in Aqua regia ( Acid+Water Mixture ).Silver will form Silver chloride precipitates, which will be filtered out.The filtered solution is treated with a Reducing agent Sodium Meta Bisulfite, and precipitates Gold, which is filtered, washed , dried and usually melted and granulated.
Inquartation Procedure
The most used refining technique is based on chemical method whereby the gold- bearing scrap is dissolved in aqua regia (HNO3 + HCl). The aqua regia refining technique efficiently works with alloys that respect the contents of silver less then 10%.
The silver percentage in the alloy represents a critical value to be considered in order to use the aqua regia refining technique.
A high silver concentration, indeed, may block the reaction due to the exceeded amount of AgCl formed during the chemical attack.
An alternative method for gold refining applied to high silver content alloys is the “inquartation procedure. Inquartation involves initially diluting the gold in the refinable material to about 25% (literally ‘quartering’ the gold) by melting with the appropriate addition of copper or silver, then treating with nitric acid.
The acid will dissolve the silver and base metals, leaving behind the gold. The acid treatment is known as parting as it ‘parts’ (separates) the gold from the silver and base metals.
Dilution of the gold content is necessary to ensure that the nitric acid can readily attack and dissolve the base metals and silver, some of which may be otherwise masked by the gold.
Four Simple Steps To Get Pure Gold
Dissolution: Acids react with gold, silver, copper and other alloy constituents to form gold chloride solution, silver chloride precipitate and copper nitrate solution.
Filtration: Silver chloride precipitate and insoluble matter is separated from solution containing dissolved gold and copper.
Reduction: Gold reagent, added to solution, reduces gold chloride to pure gold oxide precipitate.
Washing: Gold oxide is removed from the remaining solution containing dissolved copper, is chemically washed and dried. You can now melt the gold powder and re-use as required.
Gold Refinery Plant Includes
- Dissolution Reactor
- Precipitation Reactor
- Gold Filtration Unit
- Glass Coolers For Acid Flumes
- PTFE Agitator Assembly
- Hno3/ HCL Acid Charging System
- Flange & PTFE Gasket and SS Nut bolts
- Scrubber Nitrous Fumes Neutralization With Tank & Pump
- Glass Washing Scrubber For Fumes
- Electrical Panel With VFD / On Off Switches
- Platinum Reactor
Single Batch Time & Requireent
- Alloy Batch Charge 1 Kg to 6 Kg.
- Working Cycle Time In – 24 Hr 3 Batches (depends on various factors)
- Purity Can Be Obtained – Form 999.5 to 999.8-9/1000 (depends on various factors)
- Electric Power Supply – 3Ph
Dissolution Reactor Unit
- Cylindrical Borosilicate Glass Reactor 50ltr Capacity with Discharge Valve.
- PTFE Stirring With Turbine Bled & 0.5 Hp Gear Motor.
- Electrical Heater For The Reactor With Complete Protected With Fibre Glass and Thermocouple RTD Temperature Sensor.
- Glass Condenser For 3 Coil Type for Recovery the Gold Chloride Fume Evaporated During The Gold Trap Bottle and Valve
- Two Acid Charging System By AOD Pump ( Italy Make Pump ) & Charing P.P Pipe Line With Glass Charing Bottles
- PTFE Gasket And SS Nut bolts And Coating Flange and Fitting Parts
Filtration Unit
- PP Spherical Filtering Unit
- The Used or Silver and other metal remove and only gold solution pass the precipitation rector
- Filter pump by AOD pump this pump for air operated (Italy make pump)
- The filter unit for Moveable type and easy used
- Top Acrylic cover for safety use and one nozzle for joint for scrubber unit
- Plant and Filter By PP Tray For Safety
Precipitation Unit
- Cylindrical Borosilicate Glass Reactor 100ltr Capacity With Discharge Valve
- PTFE Stirring With Turbine Bled & 0.5 Hp Gear Motor
- One Gold Regent Charging System By AOD Pump (Italy Make Pump) & Charing P.P Pipe Line With Charging Bottles
- Reactor Safety Acrylic Bath And Seal Type Bath
- Reactor One Nozzle Joint to Scrubber Unit without fume operating and easy use
Scrubber Unit
- This Scrubber Unit For three stag type unit
- Pre – Washing Scrubber Unit this use acid fume only washing With PP Tank and pump with glass NRV system
- Last Scrubber For the pp scrubber no acid fume for outside and easy charging nozzle for tank Two side opening Dumper valve and centre glass view type scrubber
- Scrubber Blower with Motor and pp cover Blower CFM – 2000
- Last Stage for carbon air filter for use no outside cling air pass
Electric control And Operating Panel
- Two Type Electric Penal – Operting / Control Penal
- For Safay Use we give saperate MCB for each and every motor.
- Two Drive For Stirring Motor
- Temp Contoral With RPM Meter
- Safaty Emerjency Button And Country Type Powe Supply
- All Motor and Pump connection are socket type so easy to connect with Plant and ready to use
