Non-Toxic Technology Extracts More Gold From Ore, according to Ausome.


Non-Toxic Technology Extracts More Gold From Ore, according to Ausome.

A novel chloride-based procedure recovers 84 percent of gold, compared to 64 percent using standard methods, according to a study.

Gold is one of the most popular metals on the planet. It’s utilized in jewelry, electronics, and even space travel because it’s malleable, conductive, and non-corrosive. Traditional gold mining, on the other hand, often includes the use of cyanide, a well-known poison that has been outlawed for industrial usage in several nations.

A research team from Aalto University in Finland has effectively replaced cyanide in a major element of gold extraction from ore, indicating that the quest for a scalable non-toxic substitute may be finished. Chemical Engineering published the findings.

Gold ore is traditionally crushed to a powder and put through a series of tanks in a process known as leaching after it is extracted from the ground. The gold is subsequently separated from the ore and added to the leached solution using cyanide.

The novel method uses chloride, one of two elements found in table salt, for leaching and recovery.

“No one has found a good process for recovering small amounts of gold from industrial chloride solutions until now,” says Ivan Korolev, a doctorate candidate and project researcher.

“We’ve been able to recover as much as 84 percent of gold utilizing chloride using our technique.” In our control trial, utilizing the usual cyanide procedure with the same ore yielded only 64 percent,” he explains.

The new process, known as electrodeposition-redox replacement (EDRR), combines the best of two common methods for extracting leached gold: electrolysis, which uses electric currents to reduce gold or other metals present in the leaching solution, and cementation, which introduces particles of other metals into the solution to react with the gold. It was developed by Professor Mari Lundström and University Lecturer Kirsi Yliniemi from Aalto University’s School of Chemical Engineering.

“We utilize EDRR to build thin layers of metal – in this case copper – on the electrode and cause a reaction that stimulates gold to replace the copper layer by layer,” Korolev explains. “The procedure uses very little energy and does not require the addition of any other components.” The study was done in partnership with Metso Outotec, a Finnish mining technology company, as part of a larger EU sustainability initiative called SOCRATES. The majority of the tests took place at the company’s research center in western Finland.

“Working with Metso Outotec allowed us to develop the process in a way that was much more in line with… Summary of the latest news from Brinkwire.


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