Copper losses to slags obtained from the El Teniente process

Imris, I.; Sànchez, Miquel; Achurra, G.

doi:10.1179/037195505x49769

Cited by 32 publications

(35 citation statements)

References 13 publications

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“…Imris et al 7,8 in studies at the Caletones smelter identified 'copper prills' and chalcocite (b-Cu 2 S) inclusions in TC slag samples and chalcocite (b-Cu 2 S) in slag samples from the slag cleaning furnace. The total copper dissolved in TC slag was estimated based on the copper level in flotation tailings (0?80-1?05 wt-%Cu) from laboratory slag flotation experiments.…”

Section: Introductionmentioning

confidence: 98%

“…[4][5][6][7] On the other hand, entrained matte solidifies as mixtures of copper sulphide and/or copper iron sulphide phases having a stoichiometry depending on the composition of the entrained matte. [8][9][10][11] With high grade copper mattes, the particles solidify as rich Cu 22x S solid solutions such as chalcocite and also as digenite. It is noted that these phases are completely miscible at temperatures above 700uC.…”

Section: Introductionmentioning

confidence: 99%

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The Physical Chemistry of Copper Smelting Slags and Copper Losses at the Paipote SmelterPart 2 – Characterisation of industrial slags

Cardona

Coursol²,

Vargas³

et al. 2011

Canadian Metallurgical Quarterly

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The results of an investigation on copper losses in industrial slag from the Teniente converter (TC) and from the electrical slag cleaning furnace (EF) at the Paipote smelter in Chile are presented. Slag samples from each furnace were characterised using chemical and mineralogical techniques. The distribution of the various phases, including entrained matte, was quantified by semi-automatic image analysis. The level of soluble copper was measured by EPMA on samples cooled at a fast cooling rate. The phases found in the slag samples after such cooling are in agreement with thermodynamic calculations of the solidification process. Two types of magnetite crystals were observed in the TC slag samples: magnetite formed during slag solidification (type II) and magnetite which was present as a solid in the melt (type I). The portion of magnetite (type I) was found negligible in the EF slag samples. Sulphide phases were identified in the slag samples as solidified entrained matte, and sulphides present via ex-solution from the liquid slag during solidification. In the case of the TC, the present study has shown that with y4?6 wt-%Cu in slag, about 87% was present as entrained matte. For the electrical furnace, the amount of entrained matte represents some 25% of the copper when the average copper level in EF slag samples was y0?74 wt-%Cu.Les ré sultats d'une é tude sur les pertes en cuivre dans les laitiers du convertisseur Teniente (TC) et du four é lectrique (EF) de nettoyage du laitier de la fonderie de Paipote au Chili sont pré senté s. On a caracté risé des é chantillons de laitier de chaque four en utilisant des techniques chimiques et miné ralogiques. On a quantifié la distribution des diverses phases, incluant la matte entraîné e, au moyen de l'analyse d'image semi-automatique. On a mesuré le niveau de cuivre soluble par EPMA sur des é chantillons refroidis à un taux rapide de refroidissement. Les phases retrouvé es dans les é chantillons de laitier aprè s un tel refroidissement sont en accord avec les calculs thermodynamiques du processus de solidification. On a observé deux types de cristaux de magné tite dans les é chantillons de laitier du TC: la magné tite formé e lors de la solidification du laitier (type II) et la magné tite pré sente sous forme solide dans le bain (type I). On a trouvé que la portion de magné tite (type I) é tait né gligeable dans les é chantillons de laitier du EF. Les phases de sulfure provenant de la matte entraîné e solidifié e et les phases de sulfure formé es par ex-solution du laitier durant la solidification ont été identifiées dans les é chantillons industriels. Dans le cas du convertisseur Teniente, l'é tude pré sente a montré qu'avec ,4?6 wt-% de Cu dans le laitier, environ 87% du cuivre était pré sent sous la forme de matte entraînée. Pour le four é lectrique, la quantité de matte entraîné e repré sente quelque 25% du cuivre lorsque le niveau de cuivre moyen dans les é chantillons de laitier du EF était de ,0?74 wt-%Cu.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

The Physical Chemistry of Copper Smelting Slags and Copper Losses at the Paipote SmelterPart 2 – Characterisation of industrial slags

Cardona

Coursol²,

Vargas³

et al. 2011

Canadian Metallurgical Quarterly

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show abstract

“…Thus, reactions with other oxides (e.g., FeO) can occur, forming more stable oxides (e.g., Fe 3 O 4 ) and metallic copper. For example, during primary copper production, cuprous oxide reacts with ferrous oxide as follows [6,20,23] :…”

Section: B Initialization Mechanism For New Sticking Copper Dropletsmentioning

confidence: 99%

“…The main influencing factors are temperature, oxygen partial pressure, [2,[5][6][7] chemical activity of the metal, [2] and composition of the slag and matte. [2,[5][6][7] Mechanically entrained metal refers to entrapped or floating unsettled droplets. In primary copper production, both metallic and matte droplets are entrained, while in secondary copper production, these losses are mainly metallic copper droplets.…”

Section: Introductionmentioning

confidence: 99%

“…[19] A third frequently used methodology is the study of metal losses in slag by industrial and/or lab scale sampling procedures using industrial and/or synthetic slags. [6,[20][21][22][23] However, studies on the phenomenon of liquid metal droplets sticking to solid particles in slags have been limited. Recently, [24] we investigated the phenomenon of sticking droplets in a synthetic PbO-based slag.…”

Section: Introductionmentioning

confidence: 99%

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