Kinetic Investigation of Silver Recycling by Leaching from Mechanical Pre-Treated Oxygen-Depolarized Cathodes Containing PTFE and Nickel

Schosseler, Jil; Trentmann, Anna; Friedrich, Bernd; Hahn, Klaus M.; Wotruba, Hermann

doi:10.3390/met9020187

Cited by 11 publications

(4 citation statements)

References 13 publications

(13 reference statements)

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“…However, the full separation of the three phases-unreacted material, magnesite/calcite and amorphous silica-could not be obtained by now. The grinding process has a significant influence on further separation and metallurgical treatment [33][34][35][36]. The effect of different aggregates for comminution in lab-scale tests and scale-up carbonation test work, e.g., dry fine grinding with high pressure grinding roll or vertical roller mill, will be part of future investigations.…”

Section: Discussionmentioning

confidence: 99%

Separation of Products from Mineral Sequestration of CO2 with Primary and Secondary Raw Materials

Kremer

Wotruba

2020

Minerals

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Rising levels of greenhouse gases (GHG) in our atmosphere make it necessary to find pathways to reduce the amount of GHG, especially emissions of CO2. One approach is carbon capture and utilization by mineralization (CCUM). With this technology, it is possible to bind CO2 chemically from exhaust gas streams in magnesium or calcium silicates. Stable products of this exothermic reaction are carbonates and amorphous silica. Being amongst the biggest emitters of CO2, the cement industry has to find ways to reduce emissions. Geological mapping in Europe has been carried out to find suitable feedstock material, mainly olivines but also slags, to perform lab‑scale carbonation tests. These tests, conducted in a 1.5 L autoclave with increased pressure and temperature, have been scaled up to a 10 L and a 1000 L autoclave. The outcomes of the carbonation are unreacted feed material, carbonate, and amorphous silica, which have to be separated to produce substitutes for the cement industry as pozzolanic material (amorphous silica) or a value‑added product for other applications like paper or plastics (magnesite/calcite with bound anthropogenic CO2). Therefore, a process for the separation of ultrafine carbonation product was developed, consisting mainly of classification and flotation.

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Section: Discussionmentioning

confidence: 99%

Separation of Products from Mineral Sequestration of CO2 with Primary and Secondary Raw Materials

Kremer

Wotruba

2020

Minerals

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“…Consumer and production wastes show excellent recovery opportunities for this group of metals. That is why eleven papers deal with the recovery of base metals [12][13][14][15][16][17][18][19][20][21][22] and one of precious metals [23].…”

Section: Contributionsmentioning

confidence: 99%

Sustainable Utilization of Metals-Processing, Recovery and Recycling

Friedrich

2019

Metals

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“…Among the many printed electrode metal layers available, silver, whose resistivity is very low, is vulnerable to organic acid. 16–19 The organic acid degrades the already poor mechanical adhesion of solution-processed silver electrodes after long-term exposure to heat and light. Consequently, the printed electrodes must be protected with a proper barrier film.…”

Section: Introductionmentioning

confidence: 99%