Green Manganese demonstrates single process critical metals recovery from polymetallic nodules
Original announcement by miningcom on
- Company
- Green Manganese Technologies
- Ticker
- Unavailable
- Exchange
- Unavailable
- Region
- Unavailable
- Primary commodity
- Manganese
- Secondary commodities
- Nickel, Cobalt, Copper, Iron ore, Titanium
- Document categories
- Metallurgy
- Extracted
- 2026-09-15 21:20:12 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Green Manganese Technologies has completed initial metallurgical test work demonstrating a proprietary hydrometallurgical process that recovers manganese, nickel, cobalt, and copper from polymetallic nodules in a single integrated step. The process reportedly consumes up to 5 times less energy than conventional pyrometallurgical methods and achieves recoveries greater than 90% for the target metals.
Reasoning: Successful demonstration of a proprietary hydrometallurgical process achieving >90% recovery for manganese, nickel, cobalt, and copper from polymetallic nodules with significantly lower energy consumption.
Positive factors
- High recovery rates (>90%) for multiple critical metals
- Significant energy savings (up to 5x less energy)
- Single integrated hydrometallurgical process vs multi-stage pyrometallurgy
- Creation of additional value streams (iron, titanium, REEs)
Negative factors
- Initial metallurgical test work only (bench/screening scale)
- Process complexity of polymetallic nodules
Facts used in scoring: 4
Classification and evidence
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The process is described as a hydrometallurgical platform involving selective dissolving and integrated circuits.
Evidence · text
“its hydrometallurgical platform is engineered to extract all principal critical metals”
Single Domain Onlynegative
Testing limited to one composite or domain — representativeness not established.
Why it applies: only one composite was tested
Extracted facts
Stored fact records: 4. Some facts used in scoring do not have a stored record.
Metallurgical Results (4)
hydrometallurgicalpolymetallic nodules · manganeseRecovery: 90 %View all detailsHide details
Identity
- Project
- polymetallic nodules
- Commodity
- manganese
Test Work
- Program Status
- preliminary
- Test Type
- hydrometallurgical
- Processing Route
- proprietary hydrometallurgical process
- Sample
- polymetallic nodules
Recovery
- Recovery
- 90 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-15T00:00:00.000Z
Reasoning: Reported recovery exceeds the strong threshold for manganese in a hydrometallurgical context.
Positive factors
- Greater than 90% recovery
Evidence · text
“achieving greater than 90% recovery of manganese, nickel, cobalt, and copper simultaneously”
hydrometallurgicalpolymetallic nodules · nickelRecovery: 90 %View all detailsHide details
Identity
- Project
- polymetallic nodules
- Commodity
- nickel
Test Work
- Program Status
- preliminary
- Test Type
- hydrometallurgical
- Processing Route
- proprietary hydrometallurgical process
- Sample
- polymetallic nodules
Recovery
- Recovery
- 90 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-15T00:00:00.000Z
Reasoning: Reported recovery exceeds the strong threshold for nickel.
Positive factors
- Greater than 90% recovery
Evidence · text
“achieving greater than 90% recovery of manganese, nickel, cobalt, and copper simultaneously”
Tags used in scoring
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: 90% is at or above the exceptional band (90%)
hydrometallurgicalpolymetallic nodules · cobaltRecovery: 90 %View all detailsHide details
Identity
- Project
- polymetallic nodules
- Commodity
- cobalt
Test Work
- Program Status
- preliminary
- Test Type
- hydrometallurgical
- Processing Route
- proprietary hydrometallurgical process
- Sample
- polymetallic nodules
Recovery
- Recovery
- 90 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-15T00:00:00.000Z
Reasoning: Reported recovery exceeds the strong threshold for cobalt.
Positive factors
- Greater than 90% recovery
Evidence · text
“achieving greater than 90% recovery of manganese, nickel, cobalt, and copper simultaneously”
hydrometallurgicalpolymetallic nodules · copperRecovery: 90 %View all detailsHide details
Identity
- Project
- polymetallic nodules
- Commodity
- copper
Test Work
- Program Status
- preliminary
- Test Type
- hydrometallurgical
- Processing Route
- proprietary hydrometallurgical process
- Sample
- polymetallic nodules
Recovery
- Recovery
- 90 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-15T00:00:00.000Z
Reasoning: Reported recovery exceeds the strong threshold for copper.
Positive factors
- Greater than 90% recovery
Evidence · text
“achieving greater than 90% recovery of manganese, nickel, cobalt, and copper simultaneously”
How Atlas produces this analysis
Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.