University of British Columbia.
Academic partnership active since 2012. Technical validation of recovery and concentration efficiency on real gold tailings in a South American operation.
Four layers operating together. Advanced flotation, nano-scale liberation of occluded metals, chemistry developed over more than a decade, and algorithmic process control. The combination is what delivers 250× concentration and recovery of up to 99% in gold — with per-metal distribution anchored in the mineralogical signature of each asset.
Mineralized tailings enter the system, pass through nano liberation, compact-column flotation, and chemical recovery, and exit as high-purity concentrate with kinetics far superior to conventional flotation. Gold case: total cycle reduced from ~114h to ~16h.
Conventional flotation relies on mechanically agitated cells, with geometry and turbulence that cap concentration at 6 to 7 times. Advanced systems in column configuration reach 10 to 20 times. Green Mining operates in a proprietary compact-column configuration that enables concentration up to 250 times when combined with the other system layers.
In tailings, a significant portion of the metal is physically occluded in mineral particles, beyond the reach of conventional flotation by size and morphology. The Occluded Metals Liberation System (SLM) is a proprietary nano-scale liberation layer that exposes this metal before flotation. It's what shifts the recovery class from 60–80% to up to 99% in gold at public scale, with metal-specific ceilings anchored in the mineralogical signature of the asset.
Family of resins and catalysts developed over more than a decade of operation, tuned per commodity and per tailings profile. The specific formulation is proprietary and protected; the technical rationale is presented in detail in the technical white paper under editorial control.
The system operates with algorithmic control of key parameters — dosing, residence time, aeration profile, concentrate quality reading. Algorithms run in real time, enabling continuous adaptation to the tailings profile processed. Practical result: kinetics up to 57× faster and cycle reduced by more than 85% in the gold case.
Every mining operation generates tailings. But every tailings body is its own asset — with its own mineralogy, its own degree of oxidation, its own particle-size distribution, its own chemical history. In virgin ore, the deposit is relatively homogeneous within the mining perimeter. In tailings, heterogeneity is the rule — because what has accumulated in a dam is the sum of decades of operation, often with routes that shifted over time.
Internally, we call this the mineralogical signature of the asset. It defines how much metal is still there, in what form, and how much can re-enter circulation. And it defines, case by case, how Green Mining builds the route for that specific asset.
Mineralogy. The mineral form in which the metal is present — sulfide, oxide, carbonate, native, mixed. Gold associated with pyrite responds differently from gold associated with arsenopyrite. Sulfide copper responds differently from partially oxidized copper. Mineralogy dictates chemistry.
Degree of oxidation. How long the tailings have sat in the dam and under what conditions (climate, humidity, pH). Sulfide surfaces oxidize. Oxidation forms secondary films that reduce hydrophobicity and confuse the response of conventional reagents. Old tailings don't respond the way fresh tailings do — neither worse nor better; different.
Particle size and rheology. How fine the material was ground in the original operation, and how that distributed across the deposit. Ultra-fine slimes and very coarse particles fall outside the hydrodynamic window of conventional flotation. For Green Mining, particle size drives the design of the physical preparation stage before compact-column flotation.
Chemical history. Which reagents were used in the original processing. Xanthates, dithiophosphates, pH modifiers, depressants — all leave a residual signature on mineral surfaces. Anyone treating the tailings needs to understand what the tailings have already been through.
Target commodity and contaminants. A polymetallic tailings body (gold + silver + copper, for example) forces a routing decision: everything into the same concentrate, or selective sequential circuits. Penalty contaminants (arsenic, mercury, excess iron) impose constraints that weigh on net concentration and net recovery.
Green Mining does not apply the same recipe to every tailings body. The architecture is the same — four layers, patent granted T-01 · T-15 — but the configuration responds to each asset's signature.
Compact-column flotation is geometrically calibrated case by case to the particle size and rheology of the incoming tailings. The SLM is sized according to mineralogical occlusion — the more metal trapped in matrix, the more critical. Resins and catalysts are selected and dosed as a function of oxidation degree and chemical history — oxidized tailings call for different reagent families from fresh tailings. Algorithmic control weaves it all together in real time, reading the internal variability of the asset itself — between one sampling front and the next, between one shift and the next. T-09
No two Green Mining operations are identical. The architecture is the same. The route is by signature.
Green Mining operates, on audited scale, with recovery of up to 99% of the contained metal — gold case, under documented conditions. The distribution across metals is not uniform, and the reason is physical: each metal brings its own mineralogy, its own chemical response, its own natural ceiling in a tailings context.
Condition of useThe values above are observed ceilings under documented conditions. Effective recovery on a specific asset depends entirely on the mineralogical signature of the tailings — mineralogy, degree of oxidation, particle size, and chemical history. Without technical characterization, Green Mining will not commit to a number on uncharacterized tailings. The 99% ceiling refers specifically to the gold case, in tailings with a favorable mineralogical profile.
It is the most responsive metal in our system and the one where the combination of the four layers delivers the sharpest effect. Gold in flotation tailings typically occurs in very fine, dispersed particles, often associated with pyrite or arsenopyrite, sometimes partially oxidized. It's a noble, dense metal, with good hydrophobic response when the surface is clean — and SLM is the layer that handles the "when the surface is clean". Gold kinetics under the Green Mining system are particularly aggressive: the total cycle, on a sulfide-gold reference common in South American tailings, drops from ~114 hours on the conventional route to ~16 hours. T-10 In tailings with a favorable mineralogical profile, recovery reaches up to 99% of the contained gold.
Copper in tailings is almost always a story of two mineralogies coexisting: the sulfide portion (chalcopyrite, chalcocite, bornite) that still responds well to flotation, and the oxide portion (malachite, chrysocolla, secondary oxides) that demands a separate route. Old copper tailings tend to carry more oxidized mass than the original operator expected. Resin configuration makes a major difference here — the chemistry has to resolve both particle populations in the same circuit, or commit to selective sequential circuits. The 85% ceiling is reached when the route addresses both mineralogies; in predominantly sulfide tailings, the level is achieved with lower circuit complexity.
Zinc in tailings typically comes from sphalerite, often in association with pyrite and galena (lead) in polymetallic tailings. Sphalerite has an operational quirk: it is sensitive to depression by metal ions (copper, iron) in solution — a classic hurdle on the conventional route and a variable our algorithmic control monitors and compensates for in real time. Zinc tailings with good original liberation respond well; polymetallic tailings with secondary zinc require a selectivity decision in the circuit. The 85% ceiling is what the system delivers on liberated sphalerite.
Nickel in tailings splits between pentlandite (sulfide, typically associated with magnetic pyrrhotite) and oxidized laterites — two mineralogies that, at the source, call for different technologies. Pentlandite responds to flotation; laterite, historically, does not. The Green Mining system operates efficiently on sulfide nickel tailings, and the presence of associated pyrrhotite enters as a critical variable in circuit design — because pentlandite/pyrrhotite separation is where grade and recovery are won or lost. In tailings whose original operation was already sulfide, the 85% ceiling is consistent.
Silver is the hardest metal of the set, and that difficulty is well understood in the industry. Three reasons converge. First, silver in tailings is often very fine and dispersed — micrometric particles that fall outside the ideal hydrodynamic window. Second, silver rarely occurs pure: it shows up in solid solution inside lead sulfides (argentiferous galena), inside complex sulfosalts (tetrahedrite, freibergite, polybasite), or co-precipitated with copper. Liberating silver is always, to some degree, liberating another metal's matrix. Third, silver oxidizes and forms surface films (acanthite, secondary sulfides) that are less responsive to standard flotation chemistry. SLM and the silver-calibrated resin family make a real difference over the conventional route — but the physics of the metal imposes a lower ceiling than the others. In tailings where silver is the primary commodity, the 70% ceiling is reached with a dedicated circuit; in tailings where silver is a small-fraction co-product, the economic analysis weighs the cost-benefit of the specific circuit.
Green Mining does not commit to a number on uncharacterized tailings. Any answer before the technical assessment (stage 2 of the journey) is guesswork, and that is not how we operate.
Different assets receive different routes. The system architecture is the same; the configuration is by signature. That is part of what GM charges for in the assessment and part of what it delivers in the pilot.
The per-metal ceilings are physical, not arbitrary. Gold goes higher because the physics of gold in tailings allows it. Silver goes lower because the physics of silver in tailings imposes it. Our job is to read the signature of your asset and configure the system to extract the maximum it can hold.
Academic partnership active since 2012. Technical validation of recovery and concentration efficiency on real gold tailings in a South American operation.
Laboratory audit with reference certificate GO2511449. Methodology validated for recovery and kinetics measurements on tailings profiles.
Patent granted on the system. IP protection preserves competitive advantage and enables commercial and institutional engagement.
Full technical depth, measurement methodology, and anonymized case studies. Available via form — content for qualified technical audiences.