Biotreatment of tailings for metal recovery

1990 ◽  
Vol 9 (1-4) ◽  
pp. 193-206 ◽  
Author(s):  
J. C. Duarte ◽  
P. Estrada ◽  
H. Beaumont ◽  
M. Sitima ◽  
P. Pereira
Keyword(s):  
Metal Recovery

Appraisal of capabilities of nonferrous metal recovery from old copper-nickel ore processing tailings

2019 ◽  
Vol 7 ◽  
pp. 196-206
Author(s):  
E.V. Chernousenko ◽  
◽  
I.N. Vishnyakova ◽  
Yu.S. Kameneva ◽  
Yu.N. Neradovskiy ◽  
...  
Keyword(s):  
Nonferrous Metal ◽  
Metal Recovery ◽  
Copper Nickel ◽  
Ore Processing

Rebellious Tin Ore Processing with New Agents for Nonferrous and Noble Metal Recovery

2019 ◽  
Vol 55 (5) ◽  
pp. 832-838 ◽  
Author(s):  
T. N. Matveeva ◽  
V. V. Getman ◽  
M. V. Ryazantseva ◽  
A. Yu. Karkeshkina ◽  
L. B. Lantsova
Keyword(s):  
Noble Metal ◽  
Metal Recovery ◽  
New Agents ◽  
Ore Processing

Turning waste into wealth: remotely NIR light‐controlled precious metal recovery by covalently functionalized black phosphorus

ChemSusChem ◽  
2021 ◽  
Author(s):  
Siyu Zhang ◽  
Qing Zhao ◽  
Dongsheng Wang ◽  
Shuo Deng ◽  
Dengyu Li ◽  
...  
Keyword(s):  
Precious Metal ◽  
Metal Recovery ◽  
Black Phosphorus ◽  
Nir Light

scholarly journals Factors Affecting the Metal Recovery Yield during Induction Melting of Aluminium Swarf

2012 ◽  
Vol 730-732 ◽  
pp. 781-786
Author(s):  
Hélder Puga ◽  
Joaquim Barbosa ◽  
Carlos Silva Ribeiro
Keyword(s):  
Processing Parameters ◽  
High Energy ◽  
Metal Recovery ◽  
Raw Material ◽  
Protective Atmosphere ◽  
Induction Melting ◽  
Recovery Rates ◽  
Recovery Yield ◽  
High Efficient ◽  
Machining Operations

Machining operations of cast parts usually generate considerable amounts of waste in the form of chips (usually 3–5% of the casting weight). Traditionally, swarf is sold to scrapers and remelters, but this option is quite expensive because the selling price is roughly 30% of the acquisition price of the commercial 2nd melt raw material. For most aluminium foundries that incorporate machining operations in their products, reusing aluminium chips as raw material for the melting stocks is perhaps the best option as waste management policy in what concerns to economical and technical aspects. Nevertheless, aluminium swarf is a low density product (0.25 kg/dm3) and is usually covered by a thin film of aluminium oxide and machining fluid. Melting such a product without suitable previous preparation leads to very low metal recovery rates, high energy consumption, gases and smoke generation and very low quality of the final product. During the last years, the authors have developed a high efficient and environmentally friend aluminium swarf recycling technique, using direct incorporation in aluminium melts. The influence of processing parameters, namely melt temperature and holding time, melting atmosphere, swarf briquetting pressure and melting charge composition in the metal recovery yield and dross generation was studied and characterized, and the optimal processing parameters were established. The microstructure of the final product obtained in those conditions was evaluated and is also presented. It is shown that the recycling efficiency depends on the swarf conditioning, the melting technique and the melt treatment methodology. Swarf moisture reduction, induction melting under protective atmosphere and a specially developed degassing technique were found the most important factors influencing the recycling process. By using the developed technique, cast ingots with microstructure and sanity similar to commercially available AlSi12Cu1 2nd melt raw material were successfully obtained with minimal dross formation and metal recovery rates around 90%, without using traditional salts and fluxes.

scholarly journals Metal recovery from plating waste water by packed bed cell.

1987 ◽  
Vol 34 (1) ◽  
pp. 17-24
Author(s):  
Norio OHKAWA
Keyword(s):  
Waste Water ◽  
Packed Bed ◽  
Metal Recovery
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