Froth zone characterization of an industrial flotation column in rougher circuit / M. Massinaei in Minerals engineering, Vol. 22 N° 3 (Fevrier 2009)  

Public ISBD [article]  inMinerals engineering > Vol. 22 N° 3 (Fevrier 2009) . - pp. 272–278 Titre : Froth zone characterization of an industrial flotation column in rougher circuit Type de document : texte imprimé Auteurs : M. Massinaei, Auteur ; M. Kolahdoozan, Auteur ; M. Noaparast, Auteur Année de publication : 2009 Article en page(s) : pp. 272–278 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Froth flotation Flotation kinetics bubbles machines Modeling Index. décimale : 622 Industrie minière Résumé : In this investigation the froth zone of an industrial column (4 m “diameter” × 12 m “height”) in rougher circuit was characterized. Experiments were carried out at Miduk copper concentrator, Iran. Miduk is a unique copper processing plant which utilizes columns in rougher circuit. Cleaning and selectivity actions in the rougher froth were illustrated using solids and grade profiles along with RTD data. The impact of froth depth (FD) on overall rate constant (k) and k–Sb relationship was evaluated. Dependency of overall flotation kinetics on froth depth and gas velocity (Jg) was modeled by k = 4.97(FD)−0.87(Jg)0.80. Froth recovery (Rf) was estimated and modeled in terms of froth residence time of slurry (FRTSlurry) as Rf = Rf,maxexp(−k × FRTSlurry). Finally, the correlation between k, Sb (indicative of the collection zone performance) and FRTSlurry (indicative of the froth zone performance) was modeled by k = 0.02 (FRTSlurry)−0.62(Sb)0.82. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508002045 [article] Froth zone characterization of an industrial flotation column in rougher circuit [texte imprimé] / M. Massinaei, Auteur ; M. Kolahdoozan, Auteur ; M. Noaparast, Auteur . - 2009 . - pp. 272–278. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 3 (Fevrier 2009) . - pp. 272–278 Mots-clés : Froth flotation Flotation kinetics bubbles machines Modeling Index. décimale : 622 Industrie minière Résumé : In this investigation the froth zone of an industrial column (4 m “diameter” × 12 m “height”) in rougher circuit was characterized. Experiments were carried out at Miduk copper concentrator, Iran. Miduk is a unique copper processing plant which utilizes columns in rougher circuit. Cleaning and selectivity actions in the rougher froth were illustrated using solids and grade profiles along with RTD data. The impact of froth depth (FD) on overall rate constant (k) and k–Sb relationship was evaluated. Dependency of overall flotation kinetics on froth depth and gas velocity (Jg) was modeled by k = 4.97(FD)−0.87(Jg)0.80. Froth recovery (Rf) was estimated and modeled in terms of froth residence time of slurry (FRTSlurry) as Rf = Rf,maxexp(−k × FRTSlurry). Finally, the correlation between k, Sb (indicative of the collection zone performance) and FRTSlurry (indicative of the froth zone performance) was modeled by k = 0.02 (FRTSlurry)−0.62(Sb)0.82. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508002045

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Hydrodynamic and kinetic characterization of industrial columns in rougher circuit / M. Massinaei in Minerals engineering, Vol. 22 N° 4 (Mars 2009)  

Public ISBD [article]  inMinerals engineering > Vol. 22 N° 4 (Mars 2009) . - pp. 357–365 Titre : Hydrodynamic and kinetic characterization of industrial columns in rougher circuit Type de document : texte imprimé Auteurs : M. Massinaei, Auteur ; M. Kolahdoozan, Auteur ; M. Noaparast, Auteur Année de publication : 2009 Article en page(s) : pp. 357–365 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Froth flotation Flotation kinetics bubbles machines Résumé : In the present investigation the relationship between collection zone rate constant (kc) and gas dispersion parameters, viz. bubble size (db), superficial gas velocity (Jg), gas hold-up (εg) and bubble surface area flux (Sb) was evaluated. Experiments were conducted in an industrial (4 m in diameter and 12 m high) and a pilot (0.1 m in diameter and 4 m high) flotation column in rougher circuit at Miduk copper concentrator in Iran. Gas hold-up was measured using pressure difference technique and mean bubble sizes were estimated from a drift flux analysis. It was found that the collection zone rate constant was not correlated with db and Jg solely but was linearly dependent on εg and Sb for the range of interest. Collection efficiency (Ek) and floatability factor (P) in the industrial columns were quantified (Ek = 3.1%; P = 7.7 × 10−3). The influence of operating parameters comprising superficial gas velocity, slurry solids% and frother dosage/type on Sb and flotation kinetics was discussed. Analysis of available industrial data suggested that Sb and εg were related by Sb = 4.46εg over the range 30 DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508002422 [article] Hydrodynamic and kinetic characterization of industrial columns in rougher circuit [texte imprimé] / M. Massinaei, Auteur ; M. Kolahdoozan, Auteur ; M. Noaparast, Auteur . - 2009 . - pp. 357–365. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 4 (Mars 2009) . - pp. 357–365 Mots-clés : Froth flotation Flotation kinetics bubbles machines Résumé : In the present investigation the relationship between collection zone rate constant (kc) and gas dispersion parameters, viz. bubble size (db), superficial gas velocity (Jg), gas hold-up (εg) and bubble surface area flux (Sb) was evaluated. Experiments were conducted in an industrial (4 m in diameter and 12 m high) and a pilot (0.1 m in diameter and 4 m high) flotation column in rougher circuit at Miduk copper concentrator in Iran. Gas hold-up was measured using pressure difference technique and mean bubble sizes were estimated from a drift flux analysis. It was found that the collection zone rate constant was not correlated with db and Jg solely but was linearly dependent on εg and Sb for the range of interest. Collection efficiency (Ek) and floatability factor (P) in the industrial columns were quantified (Ek = 3.1%; P = 7.7 × 10−3). The influence of operating parameters comprising superficial gas velocity, slurry solids% and frother dosage/type on Sb and flotation kinetics was discussed. Analysis of available industrial data suggested that Sb and εg were related by Sb = 4.46εg over the range 30 DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508002422

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Hydrodynamic and metallurgical characteristics of industrial and pilot columns in rougher circuit / M. Massinaei in Minerals engineering, Vol. 22 N° 1 (Janvier 2009)  

Public ISBD [article]  inMinerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 96–99 Titre : Hydrodynamic and metallurgical characteristics of industrial and pilot columns in rougher circuit Type de document : texte imprimé Auteurs : M. Massinaei, Auteur ; M. Kolahdoozan, Auteur ; M. Noaparast, Auteur Année de publication : 2009 Article en page(s) : pp. 96–99 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Froth flotation Flotation kinetics bubbles machines Index. décimale : 622 Industrie minière Résumé : In this investigation, a pilot-scale flotation column was successfully designed, installed and tested in rougher circuit of the Miduk copper concentrator, Iran. The axial dispersion model was employed in the design procedure. Collection zone rate constant (kc) along with the target recovery of over 75% was used to size the column. The rate constant kc was determined based on a number of pilot and industrial experiments. Performance of the pilot column was compared with existing full-scale Microcel columns in a number of parallel experiments. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508000484 [article] Hydrodynamic and metallurgical characteristics of industrial and pilot columns in rougher circuit [texte imprimé] / M. Massinaei, Auteur ; M. Kolahdoozan, Auteur ; M. Noaparast, Auteur . - 2009 . - pp. 96–99. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 96–99 Mots-clés : Froth flotation Flotation kinetics bubbles machines Index. décimale : 622 Industrie minière Résumé : In this investigation, a pilot-scale flotation column was successfully designed, installed and tested in rougher circuit of the Miduk copper concentrator, Iran. The axial dispersion model was employed in the design procedure. Collection zone rate constant (kc) along with the target recovery of over 75% was used to size the column. The rate constant kc was determined based on a number of pilot and industrial experiments. Performance of the pilot column was compared with existing full-scale Microcel columns in a number of parallel experiments. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508000484

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Modeling of bubble surface area flux in an industrial rougher column using artificial neural network and statistical techniques / M. Massinaei in Minerals engineering, Vol. 23 N° 2 (Janvier 2010)  

Public ISBD [article]  inMinerals engineering > Vol. 23 N° 2 (Janvier 2010) . - pp. 83-90 Titre : Modeling of bubble surface area flux in an industrial rougher column using artificial neural network and statistical techniques Type de document : texte imprimé Auteurs : M. Massinaei, Auteur ; R. Doostmohammadi, Auteur Article en page(s) : pp. 83-90 Note générale : Génie Minier Métallurgie Langues : Anglais (eng) Mots-clés : Froth flotation Flotation machines Modeling Neural networks Index. décimale : 622 Industrie minière Résumé : Previous studies in mechanical and column flotation cells have shown that bubble surface area flux (Sb) is an appropriate indicator of gas dispersion in a flotation cell which has a relatively strong correlation with flotation rate constant. In the present investigation, based on extensive tests conducted in an industrial Metso Minerals CISA flotation column (4 m in diameter and 12 m in height) in a rougher circuit, Sb as a function of the most significant operating variables which affect gas dispersion in a flotation column (i.e. superficial gas velocity, slurry density (solids%) and frother dosage/type) was modeled using artificial neural network (ANN) and statistical (non-linear regression) techniques. The models were developed taking into consideration a data set consisting of 82 experimental tests conducted in an industrial rougher column (at a copper concentrator in Iran) operating under a variety of experimental conditions. This paper outlines the development of the models and validation using a number of randomly selected datasets. Limitations of the present models are discussed and comments and recommendations on further investigations are given. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDR-4XDKC9K-1&_user=6 [...] [article] Modeling of bubble surface area flux in an industrial rougher column using artificial neural network and statistical techniques [texte imprimé] / M. Massinaei, Auteur ; R. Doostmohammadi, Auteur . - pp. 83-90. Génie Minier Métallurgie Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 2 (Janvier 2010) . - pp. 83-90 Mots-clés : Froth flotation Flotation machines Modeling Neural networks Index. décimale : 622 Industrie minière Résumé : Previous studies in mechanical and column flotation cells have shown that bubble surface area flux (Sb) is an appropriate indicator of gas dispersion in a flotation cell which has a relatively strong correlation with flotation rate constant. In the present investigation, based on extensive tests conducted in an industrial Metso Minerals CISA flotation column (4 m in diameter and 12 m in height) in a rougher circuit, Sb as a function of the most significant operating variables which affect gas dispersion in a flotation column (i.e. superficial gas velocity, slurry density (solids%) and frother dosage/type) was modeled using artificial neural network (ANN) and statistical (non-linear regression) techniques. The models were developed taking into consideration a data set consisting of 82 experimental tests conducted in an industrial rougher column (at a copper concentrator in Iran) operating under a variety of experimental conditions. This paper outlines the development of the models and validation using a number of randomly selected datasets. Limitations of the present models are discussed and comments and recommendations on further investigations are given. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDR-4XDKC9K-1&_user=6 [...]

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