The authoritative public forum
  for Metal Finishing since 1989
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Gold Refining Equipment, Training, & Economics

Q. How to refine Gold to 99.95 % from scrap gold without acid (aqua regia). I see some sell Neutral chemical.

Anton Bijosono
Navtech Power - Makassar, Sulsel, Indonesia
2001

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Minitaur Refining System Q. I would like to know more about the gold refinery technology called "MINATAUR" and what is the cost of its machinery and equipment. Thank You Raja A [surname deleted for privacy by Editor] - Kuala Lumpur, Malaysia 2001 Q. I would like to know more about the gold refinery technology called "MINATAUR" and what is the cost of its machinery and equipment. Thank You Tahir A [surname deleted for privacy by Editor] goldsmith - U.A.E. 2002 Q. Sir, We are silver and gold refiners and traders in India. Due to govt awareness on pollution, we are searching for non pollution gold refining machines and its equipments. Please tell us about new technology called MINATAUR, WHETHER it is non polluting. Waiting for an early reply. Thanking you, Yours, Arvind Jain - Delhi, India 2002 2003 "Refining Precious Metal Wastes" by C. M. Hoke on AbeBooks or eBay or Amazon (affil links) "Recovery and Refining Of precious Metals" by C.W. Ammen on AbeBooks or eBay or Amazon (affil links) A. Gentlemen, The Minataur refining system was developed by a South African company called Mintek. A new Minataur Gold Refinery is currently being completed in Dubai and is scheduled to be on line in April 2003. Best regards, Jim Sivertsen United Precious Metal Refining - Alden, New York A. Thank you Jim. Readers will find that googling for "Mintek Minataur" will work well, whereas "Minataur" alone will drown them under irrelevancies :-) Regards, Ted Mooney, P.E. Striving to live Aloha finishing.com - Pine Beach, New Jersey Q. Dear Sirs We are gold refiner in Malaysia and are searching for a non-pollution gold refining machines and equipments. Please tell us about the technology called MINATAUR or what are the latest technologies. Thank you. Jimmy HO CM gold refiner - Kuala Lumpur, Malaysia 2006 A. Hello all, I am involved in one the gold minataur gold projects in Dubai. Can you explain to me what you want to know? Ali [surname deleted for privacy by Editor] - Dubai, UAE 2007 Q. Dear Sir, I'm a university researcher involved in gold industry in Malaysia and am searching for information on non-polluting gold refining machines and equipment, and of course its cost in terms of setting up a plant in Malaysia. Kindly respond about the technology called MINATAUR or other latest and proven technologies in related area. Thank you. Mohamad bin Abd Manaf researcher - Kuala Lumpur, MALAYSIA May 4, 2008 Q. Dear Sir, I would like to know more about the gold refinery new technology called "MINATAUR" and what is the cost of its machinery and equipment.And also please let me know where they are available. Warm Regards. Ravi B Jewellery Manufacturers - Hyderabad, Andhrapradesh, India June 5, 2008 A. Please check the below maintained link regarding the solvent extraction / Minataur Process -- www.saimm.co.za/publications/downloads/v097n04p169.pdf [ed.note: sorry, link is now broken] Raju Dhinoja - AHMEDABAD (Gujarat) INDIA September 21, 2008

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Q. Please give me details how to purchase refinery equipment.

Anthony S [surname deleted for privacy by Editor]
- GHANA
2006

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Q. I am a jeweler and want to refine my own polishing sweeps I have been a jeweler for 30 years and would like the method please. Theo [surname deleted for privacy by Editor] manufacturing jeweler - South Africa 2006 A. Hi Theo. Topic 41239 "Recovery of gold from polishing dust, sweeps floor or dirt material" will be worth a look :-) Luck & Regards, Ted Mooney, P.E. Striving to live Aloha finishing.com - Pine Beach, New Jersey

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Q. I need resources, on metal refinery equipment for purchase?

Miguel Castillo
buyer - Miami, Florida
2007

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Q. Hi! I am looking for a supplier of an Electrolytic Refining equipment for gold. Please help me.

BENJIE VAZQUEZ
RESELLER - PHILIPPINES
2007

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Q. I want to purchase a gold refining machine to convert impure gold to pure gold (24 ct) for small scale purchase (for a show room of gold jewellery).

mohan lal jaim
buyer - Hyderabad ,andhra pradesh, India
January 26, 2009

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Q. I am working on aqua regia to refinery scrap gold, if I start heating my aqua regia, what is the best safe working temperature?

Second question is that Fes or FeSO4, which chemical can be used to precipitate precious metals.

Syed Ali
Gold Refinery - Dubai, UAE
February 23, 2009

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Q. I am just curious, does anyone offer a gold refining school or a place to come and learn the process?

Lincoln Mitchell
- Marietta, Georgia & United States
August 15, 2009

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Seeking advice on 92% gold

May 4, 2020

Q. Dear Experts,
I'm going to import 1-kg gold bar with purity of 92% from Ghana. My margin is -2.5% from the market price. So, when I send this 92% 1-kg gold to refinery, to convert to 24 carat (995%), what is the net weight I will get? Will that be profitable for me to sell the metal (after refinery process) to market price?
Example : current gold price $54,885 USD (1kg).
I buy for -2.5% from the market price, i.e., $53,512.88 USD
After smelting process 1000 grams of 22 carat metal will be reduced to 990 grams of metal with purity of 995%.
So if I sell this 990 grams metal to my buyer I will get USD 54,059
I.e. (990 grams x 995 purity / 1000 = 985.05 pure gold).
If you multiply 985.05 pure gold x 54.88 (current market price, per gram) = USD 54,059.54. So my profit is only USD 546.66 (54,059.54-53,512.88=546.66). Is it advisable to buy the gold at this price ... because from this profit of 546.66 still I need to pay Smelting charges to the refinery and customs clearance charges to Dubai customs. Please advise, thanks.

Kuganathan Subramani
- Dubai, UAE