Man

Maria Cristina Ruiz Paredes

Full Professor

University of Concepcion

Concepcion, Chile

Líneas de Investigación


Atmospheric and pressure leaching of chalcopyrite and enargite, Mathematical modelling of liquid - liquid reactors, Vaporization of arsenic, antimony and bismuth at roasting temperatures, direct reduction of sulfide minerals

Educación

  •  Metallurgy, University of Utah. Estados Unidos, 1985
  •  Metallurgical Engineer, University of Concepcion. Chile, 1973

Experiencia Académica

  •   Full Professor Full Time

    UNIVERSIDAD DE CONCEPCION

    Facultad de Ingenieria

    Concepcion, Chile

    1976 - A la fecha

  •   Instructor Part Time

    University of Concepcion

    Sciences

    Concepcion, Chile

    1972 - 1973

Experiencia Profesional

  •   Project Engineer Full Time

    CODELCO

    Santiago, Chile

    1973 - 1975

Formación de Capital Humano


Direction of more than 30 undergraduate Theses of Metallurgical Engineering and Chemical Engineering students. Direction of 3 Master Theses and 3 Doctoral Theses in Metallurgical Engineering.
More than 30 years of teaching at undergraduate and graduate levels in the Metallurgical Engineering Department, University of Concepción. Undergraduate courses include: Heat Transfer, Fluid Mechanics, Hydrometallurgy, Solution Purification, and Size Reduction Processes. Graduate courses for Master and Doctorate programs include: Advanced Hydrometallurgy and Solvent Extraction. In addition, for the Magister in Applied Mineralogy has participated in the courses Extractive Metallurgy and Geometallurgical Behavior of Ore Minerals.
Other teaching activities include: a short course titled Fundaments of Chloride Hydrometallurgy for the Faculty of Geology, Mining, Metallurgy and Geographical Sciences, Universidad Mayor de San Marcos, Lima, Perú (2002), and courses on General Chemistry, Thermodynamics of Aqueous Systems and Leaching and Precipitation for a Diploma on Hydrometallurgy for Engineers of El Teniente Division of CODELCO.


Difusión y Transferencia


Organising Committee of the 19th international Solvent Extraction Conference ISEC 2011.
Advisory Committee of the 4th International Seminar on Hydrometallurgical Processes, Hydroprocess 2012.
Technical Committee of the 5th International Copper Hydrometallurgy Workshop, Hydrocopper 2009.
Technical Committee of the 2nd International Copper Hydrometallurgy Workshop, Hydrocopper 2005.



 

Article (50)

Dissolution kinetics of marmatite in sulfuric acid-ferric sulfate--sodium chloride-oxygen media at atmospheric pressure
Mechanism and kinetics of sibnite dissolution in H2SO4-NaCl-Fe(SO4)1.5-O2
Cobalt Extraction from Sulfate/Chloride Media with Trioctyl(alkyl)phosphonium Chloride Ionic Liquids
Kinetics of carbothermic reduction of marmatite in the presence of lime
Optimization of nanofiltration for treatment of acid mine drainage and copper recovery by solvent extraction
Solvent extraction of copper from sulfide-chloride solutions using mixed and modified hydroxyoximes
Mechanism and Kinetics of Stibnite Chloridizing with Calcium Chloride-Oxygen at 500 degrees C to 650 degrees C
Solvent Extraction of Copper from Sulfate–Chloride Solutions Using LIX 84-IC and LIX 860-IC
Kinetics of the Cupric Catalyzed Oxidation of Fe-II by Oxygen at High Temperature and High Pressure
Digestion Kinetics of Arsenic Removal from Enargite-Tennantite Concentrates
Galvanic Effect of Pyrite on Chalcopyrite Leaching in Sulfate-Chloride Media
Kinetics of the pressure leaching of enargite in FeSO4-H2SO4-O-2 media
ANTIMONY PRODUCTION BY CARBOTHERMIC REDUCTION OF STIBNITE IN THE PRESENCE OF LIME
Antimony production by carbothermic reduction of stibnite in the presence of lime
Kinetics of Copper Removal from Sulfidized Molybdenite Concentrates by Pressure Leaching
KINETICS OF STIBNITE (Sb2S3) OXIDATION AT ROASTING TEMPERATURES
Kinetics of Stibnite (Sb2S3) Oxidation at Roasting Temperatures
Selective arsenic removal from enargite by alkaline digestion and water leaching
Kinetics of copper dissolution in the purification of molybdenite concentrates by sulfidation and leaching
Reaction Mechanism and Kinetics of Enargite Oxidation at Roasting Temperatures
Chalcopyrite leaching in sulfate-chloride media at ambient pressure
Kinetics of the Oxidation of Bismuthinite in Oxygen-Nitrogen Atmospheres
Mechanism of enargite pressure leaching in the presence of pyrite
Copper and arsenic dissolution from chalcopyrite-enargite concentrate by sulfidation and pressure leaching in H2SO4-O-2
Decomposition-volatilization of enargite in nitrogen-oxygen atmosphere
High-Temperature Volatilization Mechanism of Stibnite in Nitrogen-Oxygen Atmospheres
Copper extraction from white metal by pressure leaching in H2SO4-FeSO4-O-2
Kinetics of copper dissolution from sulfidized chalcopyrite at high pressures in H2SO4-O-2
Kinetics of pressure dissolution of enargite in sulfate-oxygen media
Effect of variables on the quality of hematite precipitated from sulfate solutions
Oxygen pressure leaching of white metal
Pressure leaching of sulfidized chalcopyrite in sulfuric acid-oxygen media
Pressure leaching of sulfidized chalcopyrite in sulfuric acid-oxygen media
Determination of coalescence functions in liquid-liquid dispersions
Leaching of enargite in H2SO4-NaCl-O-2 media
Analysis of breakage functions for liquid-liquid dispersions
Kinetics of the sulfidation of chalcopyrite with gaseous sulfur
Leaching of sulfidized chalcopyrite with H(2)SO(4)-NaCl-O(2)
Leaching of sulfidized chalcopyrite with H2SO4-NaCl-O2
Sulfidation of chalcopyrite with elemental sulfur
Drop size distribution in a batch mixer under breakage conditions
Decomposition of enargite in nitrogen atmosphere
Kinetics of the lime enhanced reduction of Cu2S with carbon
Solvent extraction of copper from chloride solutions with LIX 860N-IC and LIX84-IC
Copper removal from molybdenite concentrate by sodium dichromate leaching
Leaching kinetics of digenite concentrate in oxygenated chloride media at ambient pressure
Reduction of molybdenite with carbon in the presence of lime
Separation of liquid-liquid dispersions in a deep-layer gravity settler: Part I. Experimental study of the separation process
Separation of liquid-liquid dispersions in a deep-layer gravity settler: Part II. Mathematical modeling of the settler
Mechanism and kinetics of stibnite chloridizing with calcium chloride-oxygen at 500 to 650 C

ConferencePaper (20)

Copper removal from molybdenite by sulfidation and leaching
Copper removal from molybdenite by sulfidation-leaching process
Oxidation-volatilization of enargite and stibnite at roasting/smelting temperatures
Pressure leaching of a chalcopyrite concentrate
Removal of arsenic from enargite rich copper concentrates
Decomposition and oxidation of bismuthinite in nitrogen-oxygen atmospheres
Enhanced pressure dissolution of enargite using pyrite or ferrous sulfate
Decomposition/volatilization of enargite in Nitrogen - Oxygen atmosphere
Pressure leaching of enargite-pyrite concentrates
Volatilization of antimonite in nitrogen-oxygen atmospheres
Precipitation rate of hematite in sulfate media
Pressure leaching of enargite in sulfate-oxygen media
Kinetics of the pressure leaching of sulfidized chalcopyrite in H 2So4-O2 media
The role of iron in the pressure leaching of white metal
Precipitation of hematite from ferrous sulfate solutions: Effects of variables on the quality of the precipitates
Pressure leaching of white metal as an alternative to conversion
Determination of drop size distributions in a continuous mixer
Sulfidation of chalcopyrite with gaseous sulfur
Leaching of a chalcocite concentrate with cupric chloride-oxygen
Leaching of chalcopyrite in CuCl-NaCl-O2 system

Proyecto (23)

SOLVENT EXTRACTION OF COPPER FROM AQUEOUS SOLUTIONS CONTAINING CHLORIDE SALTS AND SEA WATER
VAPORIZATION OF SB, AS AND BI IN CHLORINATING ROASTING OF SB2S3, CU3ASS4 AND BI2S3
REMOVAL OF ARSENIC FROM COPPER CONCENTRATES BY ALKALINE BAKING AND LEACHING WITH NA2S-NAOH
REMOVAL OF COPPER FROM MOLYBDENITE CONCENTRATES BY SULFIDATION AND LEACHING
KINETICS OF OXIDATION/VOLATILIZATION OF CU3ASS4, SB2S3, AND BI2S3 IN N2 - O2 MIXTURES
KINETICS OF OXIDATION/VOLATILIZATION OF CU3ASS4, SB2S3, AND BI2S3 IN N2 - O2 MIXTURES
PRESSURE LEACHING OF ARSENICAL COPPER CONCENTRATES WITH SIMULTANEOUS PRECIPITATION OF ARSENIC AS A STABLE FERRIC ARSENATE
LIXIVIACION EN AUTOCLAVE DE CALCOPIRITA SULFURIZADA.
TRATAMIENTO HIDROMETALURGICO DE METAL BLANCO
SULFURIZACION DE CALCOPIRITA Y ENARGITA CON AZUFRE ELEMENTAL
MODELACION MATEMATICA DE UN EQUIPO MEZCLADOR-DECANTADOR PARA EXTRACCION POR SOLVENTE DE COBRE
TRATAMIENTO DE SULFUROS DE COBRE POR CLORURO CUPRICO-OXIGENO
MODELACION MATEMATICA DE UN DECANTADOR GRAVITACIONAL PARA EXTRACCION POR SOLVENTES
Autoclave leaching of sulfidized chalcopyrite
Hidrometallurgical processing of white metal
Kinetics of oxidation/volatilization of Cu3AsS4, Sb2S3 and Bi2S3 in N2-O2 mixtures
Mathematical modeling of a gravity settler for solvent extraction
Mathematical modeling of a mixer.settler for the solvent extraction of copper
Pressure leaching of arsenical copper concentrates with simultaneous precipitation of arsenic as a stable ferric arsenate
Removal of arsenic from copper concentrates by alkaline baking and leaching with Na2S-NaOH
Removal of copper from molybdenite concentrates by sulfidation and leaching
Sulfidation of chalcopyrite and enargite with elemental sulfur
Treatment of copper sulfides by leaching with copper chloride-oxygen
75
Maria Ruiz

Full Professor

Metallurgical Engineering

University of Concepcion

Concepcion, Chile

25
Rafael Padilla

Full Professor

Department of Metallurgical Engineering

UNIVERSIDAD DE CONCEPCIÓN

Concepción, Chile

2
Oscar Jerez

Ingeniero Metalurgista

Universidad de Concepción

Concepción, Chile

1
Luis Pino

Ingeniero Químico-Proyecto

Ingeniería Química

Universidad de Concepción

Concepción, Chile

1
Alex Schwarz

PROFESOR ASOCIADO

INGENIERIA CIVIL

UNIVERSIDAD DE CONCEPCIÓN

Concepción, Chile

1
Rodrigo Bórquez

Profesor Titular

UNIVERSIDAD DE CONCEPCION

Concepcion, Chile