Gold Refining Plant
We are major manufacturer and exporter of gold and silver refining plant. We also manufacture Fuming hood, aqua regia reactor vessel, effluent treatment plant and many more. Our presented products are known for its sturdiness, longer life service and durability.
These products are manufactured by experts team who develop these products as per universal industry standards. Being a clients centric entity, we also provide these products according our clients and industry requirements.
Th above gold refining plant efficiently refines gold in any form such as old ornaments, dorebar, polishing dust, buffing dust, filing dust or any other form. The end results of refining would achieve 99.99 purity as per touch report and segregate all other impurity mix in gold such as Silver, iridium, ruthenium, osmium, zinc etc.
Our 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
Our gold refining machine can be operated by single person without having any prior knowledge. We are also committed to give you full training and support. The whole process of refining takes up to 5 to 8 hours. High quality Italy made motor and pumps other fitting parts make this machine highly efficient and very low maintenance.
Our gold refining machine is designed utilizing high grade material, procured from reliable sources of the industry and as per the defined industry norms. Our automatic gold Refining machine is mainly known for its durability and quality.
The above system is able to treat from 300 gram. to 10 kg. of raw gold. You will be 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.
Standard refining capacities per Batch – 5 kg, 20 kg Output Of Gold – 999,5/1000
Epoxy quoted structure and Polypropylene (PP) panelling
- Graduated tanks with loading system for acids.
- Glass reactor heated by steam, complete with condensers
- Polypropylene tank lid and system for loading and unloading acids
- PP loading basket for grains
- Borosilicate glass vessel. for the Au precipitation, complete of air stirrer system
- PP Trolley Filter unit for AgCl filtration complete of suction system and diaphragm pump
- PP Trolley Filter unit for Au filtering, complete of suction system and diaphragm pump
- Heat exchangers (condensers) D 200 mm . Diaphragm pumps
- Suitable water circulator and control system
- Water chilling unit 220 V 2.400 W (On demand)
- Air pump control distribution panel
- Electric board
Our gold refining machine is beneficial to the manufacturer, jewelry shop, and gold exchanger.
We also give demo of our plant prior appointment to see machines result and its authentication. Our customer is our assets and their satisfaction is our prime motto.
Installation And Commissioning
We undertake the installation, and process commissioning, training of the precious metal refining plant.
