Rand Refinery (Pty) Limited is the world's largest single site gold refining and smelting complex. It was established in 1920 to refine gold within South Africa which until that time had been refined in London.
It was established in 1920 in Germiston, South Africa, by the Chamber of Mines of South Africa to refine all the gold produced by South Africa's gold mines instead of in London.
On 27 November 1920, Rand Refinery Ltd was registered as a private company, the capital raised from shares of gold mining companies that were members of the Chamber of Mines.
Low quality ingots would be received from the gold mines and then refined to 99.6% purity and then sold to the South African Reserve Bank for sale around the world on the London and Zurich bullion markets.
In recent years, Rand Refinery has evolved from a pure refiner of doré to a more rounded company with an emphasis on beneficiation. It facilitates a wide range of value-added products including:
• cast bars
• minted bars
• minted coins
• coin blanks and medallions
• semi-fabricated products for the jewellery manufacturing industry
According to en.wikipedia