Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Pía C. Hernández"'
Autor:
Kevin Pérez, Norman Toro, Pedro Robles, Felipe M. Galleguillos Madrid, Edelmira Gálvez, Francisco Javier González, Egidio Marino, Jonathan Castillo, Ingrid Jamett, Pía C. Hernández
Publikováno v:
Metals, Vol 14, Iss 9, p 1044 (2024)
Ferromanganese crusts are mineral resources distributed in the planet’s oceans. These deep-sea minerals stand out for their abundance and diversity of metals, with Mn and Co being the most abundant elements. These minerals are a good alternative to
Externí odkaz:
https://doaj.org/article/1745b5b5b8114515b653fc44fc527292
Autor:
Kevin Pérez, Norman Toro, Pedro Robles, Sandra Gallegos, Edelmira Gálvez, Francisco Javier González, Egidio Marino, Pía C. Hernández
Publikováno v:
Metals, Vol 13, Iss 6, p 1079 (2023)
Polymetallic nodules, also called manganese nodules (due to their high content of this element), contain various valuable metals such as Cu, Ni and Co. These seabed minerals are a good alternative source of Co and Mn due to the decrease in the grade
Externí odkaz:
https://doaj.org/article/876658db931b4a6197a7ea48c762199d
Publikováno v:
Metals, Vol 11, Iss 10, p 1567 (2021)
In Chile, the hydrometallurgical plants are operating below their capacity due to a depletion of copper oxide ores. To obtain suitable pregnant leach solutions (PLSs) for hydrometallurgical plants, leaching solutions combining iodine-based oxidants a
Externí odkaz:
https://doaj.org/article/eb4e6c7fc0ec4740841999a7f153b36c
Publikováno v:
Metals, Vol 11, Iss 6, p 866 (2021)
A study of the pretreatment stage and subsequent leaching of a mixed copper ore with different chloride solutions containing iron was carried out. The first stage considered pretreatment tests to decide the best conditions. Two levels of each factor
Externí odkaz:
https://doaj.org/article/795843c6faf340da9e68be6a3e7cd255
Publikováno v:
Metals, Vol 10, Iss 4, p 518 (2020)
An alternative copper concentrate leaching process using sodium nitrate and sulfuric acid diluted in seawater followed by gas scrubbing to recover the sodium nitrate has been evaluated. The work involved leaching test carried out under various condit
Externí odkaz:
https://doaj.org/article/f0a245ed627e4411a3364864c170f12a
Cupric and Chloride Ions: Leaching of Chalcopyrite Concentrate with Low Chloride Concentration Media
Autor:
Cynthia M. Torres, Yousef Ghorbani, Pía C. Hernández, Francisca J. Justel, Matías I. Aravena, Osvaldo O. Herreros
Publikováno v:
Minerals, Vol 9, Iss 10, p 639 (2019)
In this paper, the effect of the cupric and chloride ions concentrations on copper dissolution from chalcopyrite concentrate was studied in acidified media. Variables included three different concentrations of Cu2+ (0.5, 1.5, and 2.5 g L−1), four d
Externí odkaz:
https://doaj.org/article/c2786d7044814f0a9fce917ead9791d9
Autor:
Norman Toro, Manuel Saldaña, Edelmira Gálvez, Manuel Cánovas, Emilio Trigueros, Jonathan Castillo, Pía C. Hernández
Publikováno v:
Minerals, Vol 9, Iss 7, p 387 (2019)
Manganese nodules are an attractive source of base metals and critical and rare elements and are required to meet a high demand of today’s industry. In previous studies, it has been shown that high concentrations of reducing agent (Fe) in the syste
Externí odkaz:
https://doaj.org/article/5ea5325c61e743338f1f5c6ae52687bc
Publikováno v:
Minerals, Vol 9, Iss 4, p 250 (2019)
This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. Ten pretreatment tests were conducted to evaluate different var
Externí odkaz:
https://doaj.org/article/a45dda38a45141d59c29ed6283e8721d
Publikováno v:
Minerals, Vol 8, Iss 6, p 238 (2018)
The leaching of copper from industrial copper ore with 4.8 wt % chalcopyrite by acidified nitrate with seawater based media was investigated. Water quality (pure water and seawater), temperature (25–70 °C), reagent concentration, and nitrate type
Externí odkaz:
https://doaj.org/article/3e30681b9b174988b4c6cb2cfb777b05
Publikováno v:
Minerals, Vol 8, Iss 1, p 1 (2017)
The aim of this study was to improve the dissolution of copper sulfide ore composed mainly of chalcopyrite (1.21 wt %) and bornite (0.54 wt %) using a pretreatment before leaching. The effect of the pretreatment on copper sulfide dissolution was inve
Externí odkaz:
https://doaj.org/article/2673d2a15e624e2e996a30d06ceadf51