Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Williams H. Leiva"'
Autor:
David Torres, Kevin Pérez, Felipe M. Galleguillos Madrid, Williams H. Leiva, Edelmira Gálvez, Eleazar Salinas-Rodríguez, Sandra Gallegos, Ingrid Jamett, Jonathan Castillo, Manuel Saldana, Norman Toro
Publikováno v:
Metals, Vol 14, Iss 10, p 1095 (2024)
The average lithium content in the Earth’s crust is estimated at about 0.007%. Despite this, lithium is considered abundant and widely distributed, with significant extraction from various sources. Notably, the brines in the Salar de Atacama are hi
Externí odkaz:
https://doaj.org/article/5eda7179c24b43ad9cb69eef037372c3
Autor:
Williams H. Leiva, Norman Toro, Pedro Robles, Gonzalo R. Quezada, Iván Salazar, Ricardo Jeldres
Publikováno v:
Polymers, Vol 16, Iss 10, p 1441 (2024)
High-molecular-weight anionic polyacrylamide was used to analyze the effect of kaolin on the structure of particle aggregates formed in freshwater and seawater. Batch flocculation experiments were performed to determine the size of the flocculated ag
Externí odkaz:
https://doaj.org/article/c268dbff116f41e48412fa483708e54f
Autor:
César I. Castellón, Norman Toro, Edelmira Gálvez, Pedro Robles, Williams H. Leiva, Ricardo I. Jeldres
Publikováno v:
Materials, Vol 15, Iss 19, p 6536 (2022)
In the present work an intense bibliographic search is developed, with updated information on the microscopic fundamentals that govern the behavior of flotation operations of chalcopyrite, the main copper mineral in nature. In particular, the effect
Externí odkaz:
https://doaj.org/article/5440f9c8973741fb806ec16aae3592a1
Autor:
Matías Jeldres, Luis Ayala, Pedro Robles, Edelmira Gálvez, Williams H. Leiva, Pedro G. Toledo, Ricardo I. Jeldres
Publikováno v:
Minerals, Vol 11, Iss 7, p 713 (2021)
A simple criterion is proposed to quantitatively estimate the resistance of aggregates based on incremental mechanical shear disturbances. Aggregate strength can be affected by the hydrodynamic conditions under which flocculation occurs; therefore, a
Externí odkaz:
https://doaj.org/article/70a86617817a420ca72d19242a7c9a94
Autor:
David Torres, Emilio Trigueros, Pedro Robles, Williams H. Leiva, Ricardo I. Jeldres, Pedro G. Toledo, Norman Toro
Publikováno v:
Metals, Vol 10, Iss 11, p 1426 (2020)
Chalcocite (Cu2S) has the fastest kinetics of dissolution of Cu in chlorinated media of all copper sulfide minerals. Chalcocite has been identified as having economic interest due to its abundance, although the water necessary for its dissolution is
Externí odkaz:
https://doaj.org/article/5bed75a5ecea47488e3cf22bcd1267c3
Autor:
Gonzalo R. Quezada, Luís Ayala, Williams H. Leiva, Norman Toro, Pedro G. Toledo, Pedro Robles, Ricardo I. Jeldres
Publikováno v:
Metals, Vol 10, Iss 2, p 240 (2020)
A population balance model (PBM) is used to describe flocculation of particle tailings in seawater at pH 8 for a range of mixing intensities. The size of the aggregates is represented by the mean chord length, determined by the focused beam reflectan
Externí odkaz:
https://doaj.org/article/10a7d3a0fe784cc59a0616d19e9ce328
Autor:
Ricardo I. Jeldres, Eder C. Piceros, Williams H. Leiva, Pedro G. Toledo, Gonzalo R. Quezada, Pedro A. Robles, Julio Valenzuela
Publikováno v:
Minerals, Vol 9, Iss 4, p 216 (2019)
The effect of alkali metal chlorides on the viscoelastic behavior and yielding properties of silica suspensions was studied through creep-recovery and dynamic oscillatory tests with stress control. Then, the viscoelasticity of the pulps was correlate
Externí odkaz:
https://doaj.org/article/b496abbf54a14811bfa055d1575056d0
Autor:
Luís Ayala, Pedro Robles, Edelmira D. Gálvez, Williams H. Leiva, Matías Jeldres, Ricardo I. Jeldres, Pedro G. Toledo
Publikováno v:
Minerals
Volume 11
Issue 7
Minerals, Vol 11, Iss 713, p 713 (2021)
Volume 11
Issue 7
Minerals, Vol 11, Iss 713, p 713 (2021)
A simple criterion is proposed to quantitatively estimate the resistance of aggregates based on incremental mechanical shear disturbances. Aggregate strength can be affected by the hydrodynamic conditions under which flocculation occurs
therefor
therefor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af934ece117ca7f88606a64c5c3bab10
Publikováno v:
Metals, Vol 11, Iss 1085, p 1085 (2021)
Metals
Volume 11
Issue 7
Metals
Volume 11
Issue 7
This research aims to analyze the impact of sodium tripolyphosphate (STPP) as a rheological modifier of concentrated kaolin slurries in seawater at pH 8, which is characteristic of copper sulfide processing operations. The dispersion phenomenon was a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5d00ca31ddb006fa8a1680eb9552e8f
https://www.mdpi.com/2075-4701/11/7/1085
https://www.mdpi.com/2075-4701/11/7/1085
Autor:
Julio Valenzuela, Ricardo I. Jeldres, Luis A. Cisternas, Williams H. Leiva, Lina Uribe, Leopoldo Gutierrez
Publikováno v:
Applied Clay Science. 170:57-69
The presence of clay leads to low recoveries in the process of flotation of copper ores which is also reflected in a decrease of the concentrates grades. Due to this, the scientific interest in studying the effect and mechanisms of action of clay min
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b54741324a737055f4902aaf8402510f
https://doi.org/10.1016/j.clay.2019.01.013
https://doi.org/10.1016/j.clay.2019.01.013