Technogenic Deposits in Russia: Precious Metals Stocks and Prospects of Their Recovery

Boduen, A. Ya.; Петров, Г. В.; Ttoitskaya, Maria; Фокина, С. Б.

doi:10.5539/jmsr.v3n1p21

Cited by 4 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…57,454 USD per 1 kg in January 2020) [104], Au recovery from fine-grained PIR using the suggested two-step thiourea-Fe 3+ extraction procedure could represent a new high-profit niche for the MSWI residue recycling industry. The high content of Au in the PIR (28.82 ± 1.62 mg/kg) and the high extraction efficiency (more than 50%) allows us to consider the fine-grained PIR fraction as a valuable urban ore comparable in Au content with other types of secondary materials [27,105,106]. Upscaling of laboratory technology is a complex process that can lead to losses in Au-leaching efficiency.…”

Section: Use Of Secondary Materials For Au Leachingmentioning

confidence: 99%

Thiourea leaching of gold from processed municipal solid waste incineration residues

Abramov

Wimmer

et al. 2022

J Mater Cycles Waste Manag

View full text Add to dashboard Cite

Incineration is one of the key technologies in disposal of municipal waste, which produces municipal solid waste incineration (MSWI) residues with high valuable metal contents. The recycling strategy for the MSWI residues is typically focused on the recovery of scrap metals yielding processed municipal solid waste incineration residues (PIR) as the main byproduct. However, the PIR still contains valuable metals, particularly gold, which cannot be extracted by conventional methods. Here, we evaluated the feasibility of using the 0.5–2.0 mm grain size fraction of PIR containing 28.82 ± 1.62 mg/kg of gold as raw material for a two-stage extraction process. In the first stage the alkalic fine-grained PIR was acidified with a solution of 20% (v/v) of HCl-containing flue gas cleaning liquid that is obtained by the municipal waste incineration plant itself as a waste product. In the second stage we leached the acidified fine-grained PIR by thiourea with Fe3+ as an oxidant. Application of the thiourea-Fe3+ leaching system resulted in recovery of 16.4 ± 1.56 mg/kg of gold from the fine-grained PIR within 6 h of incubation. Due to high gold market prices, upscaling of the suggested technology can represent a suitable strategy for gold recovery from PIR and other MSWI residues.

show abstract

Section: Use Of Secondary Materials For Au Leachingmentioning

confidence: 99%

Thiourea leaching of gold from processed municipal solid waste incineration residues

Abramov

Wimmer

et al. 2022

J Mater Cycles Waste Manag

View full text Add to dashboard Cite

show abstract

“…Sources of such technogenic waste sources are; impounded mill tailings of sulphide copper-nickel ores, old pyrrhotine concentrates (OPC), impounded magnetite concentrates, slag-dust dumps of the mining and metallurgical companies and technogenic platinum-metal chromite placer deposits of many parts of former Soviet Union territories [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Energy-saving method for technogenic waste processing

Dikhanbaev¹,

Gomes

Dikhanbaev³

2017

PLoS ONE

View full text Add to dashboard Cite

Dumps of a mining-metallurgical complex of post-Soviet Republics have accumulated a huge amount of technogenic waste products. Out of them, Kazakhstan alone has preserved about 20 billion tons. In the field of technogenic waste treatment, there is still no technical solution that leads it to be a profitable process. Recent global trends prompted scientists to focus on developing energy-saving and a highly efficient melting unit that can significantly reduce specific fuel consumption. This paper reports, the development of a new technological method—smelt layer of inversion phase. The introducing method is characterized by a combination of ideal stirring and ideal displacement regimes. Using the method of affine modelling, recalculation of pilot plant’s test results on industrial sample has been obtained. Experiments show that in comparison with bubbling and boiling layers of smelt, the degree of zinc recovery increases in the layer of inversion phase. That indicates the reduction of the possibility of new formation of zinc silicates and ferrites from recombined molecules of ZnO, SiO2, and Fe2O3. Calculations show that in industrial samples of the pilot plant, the consumption of natural gas has reduced approximately by two times in comparison with fuming-furnace. The specific fuel consumption has reduced by approximately four times in comparison with Waelz-kiln.

show abstract

Review of Man-Made and Secondary Raw Materials of Platinum-Group Metals and their Classification

Fedorov

Amdur

2021

Metallurgist

View full text Add to dashboard Cite

Technogenic Deposits in Russia: Precious Metals Stocks and Prospects of Their Recovery

Cited by 4 publications

References 0 publications

Thiourea leaching of gold from processed municipal solid waste incineration residues

Thiourea leaching of gold from processed municipal solid waste incineration residues

Energy-saving method for technogenic waste processing

Review of Man-Made and Secondary Raw Materials of Platinum-Group Metals and their Classification

Contact Info

Product

Resources

About