Articles for tag: 195carat, Diamond, Lucapa, Lulo, recovers

May 28, 2024

Ron Finklestien

mining

Lucapa recovers 195-carat diamond from Lulo mine

The mine, which hosts the world’s highest dollar-per-carat alluvial diamonds, began commercial production in January 2015. Only a year later, it delivered the largest ever diamond recovered in Angola — a 404-carat white stone later named the “4th February Stone”. Lucapa has a 40% stake in the Lulo mine. The rest is held by Angola’s national diamond company (Endiama) and Rosas & Petalas, a private entity. Angola is the world’s fifth diamond producer by value and sixth by volume. Its industry, which began a century ago under Portuguese colonial rule, is successfully being liberalized.

April 21, 2024

Ron Finklestien

mining

New process recovers five times more lithium from waste than existing technology

“The key advantage is that it works in a wider pH range of 5 to 11 compared to other direct lithium extraction methods,” Parans Paranthaman, ORNL Corporate Fellow and co-author of the papers that present these findings, said in a media statement.  The patent-pending acid-free extraction process takes place at 140 degrees Celsius, compared to traditional methods that roast mined minerals at 250 degrees Celsius with acid or 800 to 1000 degrees Celsius without acid. The technique works based on lithiation, during which an aluminum hydroxide powder extracts lithium ions from a solvent to form a stable layered double hydroxide,