Uranium Mining


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Overview of Key Concepts and Methods in Uranium Extraction and Processing

1. Mining Methods

The three most common methods for extracting uranium ore:

  • Open-pit mining: Used when uranium is located near the surface. The top layers of soil and rock (overburden) are removed to reach the ore.

  • Underground mining: Used for deeper deposits. It involves tunnels and shafts. Ventilation is critical here due to radon gas.

  • In-situ Leaching (ISL) / In-situ Recovery (ISR): The most widespread method today. A chemical solution (lixiviant) is pumped into the ground to dissolve the uranium directly within the rock, after which the liquid is pumped back to the surface.

2. Processing and Milling

Once the ore is extracted, it must be concentrated:

  • Uranium Mill: The facility where the ore is crushed and chemically treated.

  • Crushing and Grinding: The ore is reduced to a fine powder.

  • Leaching: The use of acid (typically sulfuric acid) or alkaline solutions to extract uranium from the pulverized powder.

  • Yellowcake (U3​O8​): The final uranium ore concentrate. It is a yellow (or dark brown) powder and is the primary product traded on the global market.

3. Important Terminology

  • Uranium ore

  • Deposit (Geologisk forekomst)

  • Enrichment (Berigelse)

  • Tailings (Radioaktivt affald fra minedrift)

  • Exploration (Efterforskning)

  • Remediation / Reclamation (Genopretning af landskab)

4. Environmental and Safety Terms

  • Tailings Dams: Large embankments or basins where liquid waste from the process is stored.

  • Radiation Protection: Safety measures for mine workers.

  • Groundwater Monitoring: Tracking groundwater quality to ensure chemicals or radioactivity do not leak.

5. The Nuclear Fuel Cycle

Extraction is only the first step:

  1. Mining & Milling (Extraction and concentration)

  2. Conversion (Conversion to gas, UF6​)

  3. Enrichment (Increasing the concentration of U235)

  4. Fuel Fabrication (Manufacturing of fuel rods)

  5. Nuclear Reactor (Power production)


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