Thermoanalytical study on the oxidation of sulfide minerals at high temperatures

S. E. Pérez-Fontes; M. Pérez-Tello; L. O. Prieto-López; F. Brown; F. Castillón-Barraza

doi:10.1007/bf03403377

Thermoanalytical study on the oxidation of sulfide minerals at high temperatures

S. E. Pérez-Fontes^*, M. Pérez-Tello, L. O. Prieto-López, F. Brown, F. Castillón-Barraza

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

An experimental study on the oxidation of chalcopyrite (CuFeS₂), pyrite (FeS₂), covellite (CuS) and chalcocite (CU₂S) particles was conducted by means of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. The oxygen concentration in the process gas was set to 40% and 70% (by volume) and a heating rate of 40°C/min was used. Response variables included the temperature of incipient reaction, the total exothermic heat of reaction, particle mass, morphology and mineralogy of the reacted particles. Based on the experimental data and phase stability calculations, reaction mechanisms were proposed to represent the behavior of the particles during oxidation. The reaction mechanisms were verified by X-ray diffraction (XRD) analyses of the oxidized particles and by thermochemical and mass balance calculations to reproduce the DSC and TGA data. Overall kinetic models were developed to represent the evolution of the exothermic heat of reaction as a function of time.

Original language	English
Pages (from-to)	275-283
Number of pages	9
Journal	Minerals and Metallurgical Processing
Volume	24
Issue number	4
DOIs	https://doi.org/10.1007/bf03403377
State	Published - Nov 2007

Keywords

Flash smelting
Sulfide particles
Thermal analysis

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10.1007/bf03403377

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@article{b705a7b72e47437aba70688c940af863,

title = "Thermoanalytical study on the oxidation of sulfide minerals at high temperatures",

abstract = "An experimental study on the oxidation of chalcopyrite (CuFeS2), pyrite (FeS2), covellite (CuS) and chalcocite (CU2S) particles was conducted by means of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. The oxygen concentration in the process gas was set to 40% and 70% (by volume) and a heating rate of 40°C/min was used. Response variables included the temperature of incipient reaction, the total exothermic heat of reaction, particle mass, morphology and mineralogy of the reacted particles. Based on the experimental data and phase stability calculations, reaction mechanisms were proposed to represent the behavior of the particles during oxidation. The reaction mechanisms were verified by X-ray diffraction (XRD) analyses of the oxidized particles and by thermochemical and mass balance calculations to reproduce the DSC and TGA data. Overall kinetic models were developed to represent the evolution of the exothermic heat of reaction as a function of time.",

keywords = "Flash smelting, Sulfide particles, Thermal analysis",

author = "P{\'e}rez-Fontes, {S. E.} and M. P{\'e}rez-Tello and Prieto-L{\'o}pez, {L. O.} and F. Brown and F. Castill{\'o}n-Barraza",

year = "2007",

month = nov,

doi = "10.1007/bf03403377",

language = "Ingl{\'e}s",

volume = "24",

pages = "275--283",

journal = "Minerals and Metallurgical Processing",

issn = "0747-9182",

publisher = "Society for Mining, Metallurgy and Exploration",

number = "4",

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TY - JOUR

T1 - Thermoanalytical study on the oxidation of sulfide minerals at high temperatures

AU - Pérez-Fontes, S. E.

AU - Pérez-Tello, M.

AU - Prieto-López, L. O.

AU - Brown, F.

AU - Castillón-Barraza, F.

PY - 2007/11

Y1 - 2007/11

N2 - An experimental study on the oxidation of chalcopyrite (CuFeS2), pyrite (FeS2), covellite (CuS) and chalcocite (CU2S) particles was conducted by means of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. The oxygen concentration in the process gas was set to 40% and 70% (by volume) and a heating rate of 40°C/min was used. Response variables included the temperature of incipient reaction, the total exothermic heat of reaction, particle mass, morphology and mineralogy of the reacted particles. Based on the experimental data and phase stability calculations, reaction mechanisms were proposed to represent the behavior of the particles during oxidation. The reaction mechanisms were verified by X-ray diffraction (XRD) analyses of the oxidized particles and by thermochemical and mass balance calculations to reproduce the DSC and TGA data. Overall kinetic models were developed to represent the evolution of the exothermic heat of reaction as a function of time.

AB - An experimental study on the oxidation of chalcopyrite (CuFeS2), pyrite (FeS2), covellite (CuS) and chalcocite (CU2S) particles was conducted by means of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. The oxygen concentration in the process gas was set to 40% and 70% (by volume) and a heating rate of 40°C/min was used. Response variables included the temperature of incipient reaction, the total exothermic heat of reaction, particle mass, morphology and mineralogy of the reacted particles. Based on the experimental data and phase stability calculations, reaction mechanisms were proposed to represent the behavior of the particles during oxidation. The reaction mechanisms were verified by X-ray diffraction (XRD) analyses of the oxidized particles and by thermochemical and mass balance calculations to reproduce the DSC and TGA data. Overall kinetic models were developed to represent the evolution of the exothermic heat of reaction as a function of time.

KW - Flash smelting

KW - Sulfide particles

KW - Thermal analysis

UR - http://www.scopus.com/inward/record.url?scp=36148939925&partnerID=8YFLogxK

U2 - 10.1007/bf03403377

DO - 10.1007/bf03403377

M3 - Artículo

SN - 0747-9182

VL - 24

SP - 275

EP - 283

JO - Minerals and Metallurgical Processing

JF - Minerals and Metallurgical Processing

IS - 4

ER -

Thermoanalytical study on the oxidation of sulfide minerals at high temperatures

Abstract

Keywords

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