![The DRC exported more than 14,000 tons of cassiterite for a value of 146 million USD in the first half of 2021 - Copperbelt Katanga Mining The DRC exported more than 14,000 tons of cassiterite for a value of 146 million USD in the first half of 2021 - Copperbelt Katanga Mining](https://copperbeltkatangamining.com/wp-content/uploads/2021/09/cassiterite34915a-e1605869784513.jpg)
The DRC exported more than 14,000 tons of cassiterite for a value of 146 million USD in the first half of 2021 - Copperbelt Katanga Mining
![Tantalum supply from artisanal and small-scale mining: A mineral economic evaluation of coltan production and trade dynamics in Africa's Great Lakes region - ScienceDirect Tantalum supply from artisanal and small-scale mining: A mineral economic evaluation of coltan production and trade dynamics in Africa's Great Lakes region - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0301420720309272-gr4.jpg)
Tantalum supply from artisanal and small-scale mining: A mineral economic evaluation of coltan production and trade dynamics in Africa's Great Lakes region - ScienceDirect
![SOLVED: A concentrator produces chalcopyrite ore from a feed grade of 0.5% Cu per ton of ore. A Cu concentrate is obtained with 18% Cu grade and 81% recovery. According to the SOLVED: A concentrator produces chalcopyrite ore from a feed grade of 0.5% Cu per ton of ore. A Cu concentrate is obtained with 18% Cu grade and 81% recovery. According to the](https://cdn.numerade.com/ask_images/bff9d5845cc748a2afc3471c8160edfb.jpg)
SOLVED: A concentrator produces chalcopyrite ore from a feed grade of 0.5% Cu per ton of ore. A Cu concentrate is obtained with 18% Cu grade and 81% recovery. According to the
![Tantalum supply from artisanal and small-scale mining: A mineral economic evaluation of coltan production and trade dynamics in Africa's Great Lakes region - ScienceDirect Tantalum supply from artisanal and small-scale mining: A mineral economic evaluation of coltan production and trade dynamics in Africa's Great Lakes region - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0301420720309272-gr7.jpg)
Tantalum supply from artisanal and small-scale mining: A mineral economic evaluation of coltan production and trade dynamics in Africa's Great Lakes region - ScienceDirect
![Rock-to-Metal Ratio: A Foundational Metric for Understanding Mine Wastes | Environmental Science & Technology Rock-to-Metal Ratio: A Foundational Metric for Understanding Mine Wastes | Environmental Science & Technology](https://pubs.acs.org/cms/10.1021/acs.est.1c07875/asset/images/large/es1c07875_0007.jpeg)