More efficient technique to mine polymetallic nodules, Pg10

Key Highlights:

• Researchers have developed a new smelting process for polymetallic nodules that uses hydrogen to extract oxygen from metal oxides.
• The new method produces an alloy rich in nickel, copper, and cobalt, along with manganese-rich byproducts for batteries.
• This smelting process significantly reduces CO2 emissions compared to current industrial methods and is more efficient.

Detailed Insights:

• The discovery of rich ecosystems on ocean floors has not stopped plans to mine polymetallic nodules.
• The new smelting process melts the nodules and uses hydrogen instead of carbon to remove oxygen from metal oxides in one step.
• The process yields an alloy containing valuable metals and manganese-rich byproducts that can be used in batteries, enhancing resource utilization.
• By using hydrogen instead of carbon, the smelting process drastically cuts CO2 emissions, offering a more environmentally friendly approach to mining.

Scientific/Technical Concepts Involved:

• Polymetallic Nodules: Mineral concretions on the seabed containing valuable metals like nickel, copper, cobalt, and manganese.
• Smelting: A process of extracting metal from its ore by heating beyond the melting point in the presence of oxidizing agents.
• Metal Oxides: Chemical compounds composed of a metal and oxygen, which need to be reduced to extract the pure metal.