Jka International Fze works hand in hand with the local communities in mining sites to extract and produce quality ores.
In placer mining, the gold is retrieved by metal detecting, panning, cradling, sluicing and dredging. ... Hard rock mining is the process of using open pit or underground mining tunnels to retrieve the gold from the rock. This method of gold mining is responsible for recovering most of the worlds gold supply.
The two gold refining methods most commonly employed to derive pure gold are: the Miller process and the Wohlwill process.
The Miller process uses gaseous chlorine to extract impurities when gold is at melting point; impurities separate into a layer on the surface of the molten purified gold. The Miller process is rapid and simple, but it produces gold of only about 99.5 percent purity.
The Wohlwill process increases purity to about 99.99 percent by electrolysis. In this process, a casting of impure gold is lowered into an electrolyte solution of hydrochloric acid and gold chloride. Under the influence of an electric current, the gold migrates to a negatively charged electrode (cathode), where it is restored to a highly pure metallic state, leaving the impurities as a separate solution or residue.
The dried gold sand is melted in a furnace and cast into bars. Depending on the capacity of the Gold Refinery installation, casting of 400 troy ounces (~12 kg) fine gold bars is done either manually by using a removable crucible and a casting table. The gold bars are then cooled in a water bath. Alternatively, gold granules can be produced.
More gold is recovered by cyanidation than by any other process. In cyanidation, metallic gold is oxidised and dissolved in an alkaline cyanide solution. When gold dissolution is complete, the gold-bearing solution is separated from the solids.
With ores of higher gold content (greater than 20 grams of gold per tonne of ore), cyanidation is accomplished by vat leaching, which involves holding a slurry of ore and solvent in large tanks equipped with agitators.
For extracting gold from low-grade ores, heap leaching is practiced; huge heaps are sprayed with a dilute solution of sodium cyanide, and this percolates down through the piled ore, dissolving the gold.
Jka International Fze has a good transport system which is capable of handling consignments of any magnitude. Moving in and out for consignments are done with much caution and dexterity in order not to compromise security. We put in much efforts to satisfy our Clients far and wide, for that matter they are assured of a reliable service at all times. We strive to meet deadlines to any destination even when they are given at the eleventh hour. We have a flexible Export rates.
Jka International Fze Metals Refinery is a High Security Complex and it is protected round-the-clock. It partly relies on using the latest surveillance control and alarm systems to support manpower surveillance on its premises. The Company also employs Highly Technical Security Personnels. When it comes to metal transfers and transportation of valuable materials to and from our plant, applicable standard handling levels are used for control and security. We are intimately knitted with our Clients to ensure a smooth and secure process at all times. Jka International Fze security systems and vaults are consistently inspected by specialist for maintenance purposes.
Address: Elob Office No. E-58G- 29, Po.Box ; 41780 Hamriyah Free Zone, Sharjah, United Arab Emirates
Email: info@jkainternationalfze.com
Email: customer.service@jkainternationalfze.com