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Article
Monitoring polythionate bio-oxidation by conductivity measurement
(Elsevier, 2016)
Polythionates are formed by the incomplete oxidation of sulphide minerals in the grinding and flotation circuits, and particularly of those containing pyrite. Polythionate levels in the recycling water must be adjusted; ...
Article
Treatment of secondary copper sulphides (chalcocite and covellite) by the BRISA process
(Elsevier, 2002-10)
The technical viability of the BRISA process (Biolixiviación Rápida Indirecta con Separación de Acciones: Fast Indirect Bioleaching with Actions Separation) for secondary copper sulphides has been proved. One concentrate ...
Article
An alternative approach to recover lead, silver and gold from black gossan (polymetallic ore). Study of biological oxidation and lead recovery stages
(Elsevier, 2019-01)
A novel procedure to recover lead, silver and gold from polymetallic sulphide ores, cleaner than the traditional hydrometallurgical route (hot brine leaching), is proposed. This process consists of a biooxidation stage, ...
Article
Ferric iron production in packed bed bioreactors: Influence of pH, temperature, particle size, bacterial support material and type of air distributor
(Elsevier, 2001-05)
The biooxidatíon of ferrous iron in solution has industrial applications in the regeneration of ferric iron as a leachíng agent for non-ferrous metallic sulphides and in the treatment of acid mine drainage. The aim of this ...
Article
Biotic factor does not limit operational pH in packed-bed bioreactor for ferrous iron biooxidation
(Oxford University Press, 2012-12-01)
Ferrous ion biooxidation is a process with many promising industrial applications: mainly regeneration of ferric ion as an oxidizing reagent in bioleaching processes and depuration of acid mine drainage. The flooded packedbed ...
Article
Recovery of Zn from acid mine water and electric arc furnace dust in an integrated process
(Elsevier, 2016-01-01)
In this paper, the purification of acid mine water and the treatment of electric arc furnace dust (EAFD) are integrated into one process with the aim of recovering the Zn content of both effluent and waste. Zinc recovery ...
Article
Copper recovery from chalcopyrite concentrates by the BRISA process
(Elsevier, 2003-07)
The technical viability of the BRISA process (Biolixiviación Rápida Indirecta con Separación de Acciones: Fast Indirect Bioleaching with Actions Separation) for the copper recovery from chalcopyrite concentrates has been ...
Article
Eliminación de la refractariedad de una mena de oro en matriz de arsenopirita mediante sulfato férrico
(CSIC, 1992)
Se estudia la eliminación de la refractariedad de una mena de oro en matriz de arsenopirita. Se prepararon concentrados de flotación que se lixiviaron con sulfato férrico. Se comprueba que la capa de azufre elemental, ...
Article
The reprocessing of hydrometallurgical sulphidic tailings by bioleaching: the extraction of metals and the use of biogenic liquors
(Elsevier, 2022-01)
Mineralurgical and metallurgical processes generate a large amount of harmful residues. These wastes usually contain a considerable fraction of sulphides and a low percentage of target metals. Due to their characteristics, the ...