Home / Project / NEMO Pilots

NEMO Pilots

A key aspect of the NEMO project is to increase the technology readiness level (TRL) of different innovative technologies within the near-zero waste treatment of sulphidic ores and sulphidic mining waste. For this, different NEMO pilots are set-up around the E.U., as is indicated by the red flags in the figure below.

Figure: Location of NEMO pilots around the E.U. (click to enlarge)

The TRL at the start of NEMO and the TRL aimed for at the end of the NEMO project is indicated in the Table below.

Overview of the different NEMO Pilots (click to enlarge).

More info of the pilots is given in the paragraphs below.

Pilot 1: Innovative bioleaching

In pilot 1 ‘Innovative Bioleaching’, the partners Terrafame/Finnish Minerals Group, Exeter and BRGM work on innovative bio-leaching pilots for metal extraction. Pilot 1 will have as input material the sulphidic, low-grade primary heap residue from the Sotkamo mine (Finland). Bioleaching composes either heap-leaching or leaching in “ponds”. The pond leaching design relies on special agitators and aerators, which makes operations in low-tech reactors possible, but with extremely high pulp densities and without a typical decrease in the leaching efficiency.

Discover more of the sub-pilots:

  • Heap bioleaching (Exeter)
  • Heap bioleaching (Terrafame)
  • Pond bioleaching (BRGM)

Picture: Primary bio heap leaching operations at the Sotkamo mine. Source: Terrafame.

Pilot 2: Tank bio-leaching

In pilot 2, tank bioleaching is combined with different metal precipitation and purification steps to produce Co, Ni, Cu and Zn. The pilot is used to treat high-pyrite containing residues. The core process in the pilot is a tank bioleaching process, developed by BOLIDEN, VTT and BRGM. Metals are recovered by precipitation as either mixed Co-Ni-Cu-Zn concentrate or (Co-Ni)S, CuS and ZnS. The Co-Ni mixture is further processed to produce battery grade CoSO4 and NiSO4 by KU Leuven and VTT. Arsenic is removed during the Fe-hydroxide precipitation and the final gypsum precipitate is reprocessed to produce CaO. As an alternative to the bioleaching, the concept of alkaline autoclave leaching is tested by IMNR.

Discover more of the sub-pilots:

Pilot 3: Additional metal recovery

In pilot 3 different processes for metal recovery from pregnant leach solution from sulphidic ores/residues are upscaled. There are three principal activities in PILOT 3: VTT’s sulphide precipitation pilot for precipitation of CuS, ZnS and (Co-Ni)S, an aqueous (VTT) and a non-aqueous (KUL) solvent extraction mixer-settler battery system for Sc and REE recovery, and a hydroxide precipitation pilot for additional metal recovery (skyscape).

Discover more of the sub-pilots:

Picture: Metal recovery pilot at NEMO partner VTT. Source: VTT

Pilot 4: Cleaned Mineral Fraction Upcycling to Cement and Concrete End Products

Pilot 4 is coordinated by Thyssenkrupp, and involves the partners Jacobs NV, Resourcefull and VITO. The three main actions as part of this pilot are the alternative composite cements and aggregate production and the concrete end-products demonstration The outputs from PILOT 4 are cementitious materials, aggregates and concrete end-products made from the cleaned mineral fraction.

Discover more of the sub-pilots:

Picture: tailings based Concrete tile production at NEMO partner Resourcefull. Source: Storyrunner.