Enhanced flotation of sulfide fines using the emulsified oil extender technique

Rubio, J.; Capponi, Fabiano Nunes; Rodrigues, Rafael Teixeira; Matiolo, Elves

doi:10.1016/j.minpro.2007.04.002

Cited by 39 publications

(6 citation statements)

References 24 publications

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“…Although around 80% of Cu could be recovered by this method, it required the use of a significant amount of oil (around 85 L/t). To address this problem, Rubio et al [26] investigated flotation of finely ground chalcopyrite using emulsified oil. In their study, the emulsified oil was used as an extra reagent and directly added into the flotation cell right before flotation, which is most likely not enough for agglomerating fine particles.…”

Section: Introductionmentioning

confidence: 99%

Agglomeration-Flotation of Finely Ground Chalcopyrite and Quartz: Effects of Agitation Strength during Agglomeration Using Emulsified Oil on Chalcopyrite

et al. 2020

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In flotation, the size of mineral particles is one of the most important parameters: when the size becomes fine, collision efficiency of the particles and air bubbles becomes low, causing low flotation recovery. To improve the collision efficiency and flotation kinetics, agglomeration using the emulsified oil of finely ground chalcopyrite (D50 = 3.5 μm) was carried out before flotation. In this study, the effects of agitation strength during agglomeration, kerosene dosage and potassium amyl xanthate (KAX) dosage on the flotation were investigated. Agglomeration using emulsified oil improved Cu recovery because the median diameter of agglomerate increased. With increasing agitation strength, KAX and kerosene dosages, Cu recovery was further increased. Agglomeration-flotation of a mixture containing chalcopyrite and quartz with 1:1 ratio (w/w, weight by weight) showed that Si recovery in froth was low and did not change with varying conditions (agitation strength, KAX and kerosene dosages); however, Cu recovery was significantly improved with increasing agitation strength, KAX and kerosene dosages, and thus the separation efficiency was improved.

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Section: Introductionmentioning

confidence: 99%

Agglomeration-Flotation of Finely Ground Chalcopyrite and Quartz: Effects of Agitation Strength during Agglomeration Using Emulsified Oil on Chalcopyrite

et al. 2020

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“…Biswas and Davenport (2013) explained that Kerosene and fuel oil are good collectors for molybdenite and used potassium amyl xanthate as scavenger flotation. In other researches (Schena & Casali, 1994;Bulatovic, Wyslouzil, & Kant, 1998;Rath & Subramanian, 1999;Rubio, Capponi, Rodrigues, & Matiolo, 2007) kerosene, vapor oil, fuel oil, transformer oil and other hydrocarbons were used in direct flotation of molybdenite. Additionally, Yin, Zhang, & Xie (2010) used kerosene as the collector in Xinhua Molybdenum Flotation Plant (Liaoning, China).…”

Section: Introductionmentioning

confidence: 99%

Optimization of molybdenite flotation using response surface method

Badri¹,

Khanchi²,

Zojaji³

et al. 2018

Min. miner. depos.

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Purpose. The paper is aimed to study the molybdenite flotation from a low-grade uranium ore containing 0.2% of Mo.Methods. Three control parameters including frother (MIBC) dosage, collector (gasoline) dosage and pH, each in five levels, were investigated. Response surface methodology (RSM) was performed for statistical design and analysis of experiments and process modeling. Four quadratic mathematical models were derived for prediction of Mo recovery and Mo grade.Findings. Analysis of variance showed that frother and collector dosage were the most significant factors affecting Mo recovery and grade. In process optimization, maximum values of Mo recovery and grade were achieved as 79.13% and 2.93%, respectively. Optimum frother concentration of 78.93 g/t, gasoline dosage of 507.70 g/t, and pH of 9.77, for Mo recovery were obtained. However, in optimization studies, a case proposed the model in which the same consumption of reagents is used.Originality. There is a recognized need for type of uranium ore which contains Molybdenite, therefore working on molybdenite removing from this ore helps to recover uranium in the next steps. This research provides a novel approach to gain the optimum recovery and grade to extract uranium so easily. Practical implications.This study showed that response surface methodology could be effectively used for flotation process modeling as well as finding an optimum condition to achieve maximum recovery and grade under minimum consumption of flotation reagents.

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“…Xanthate are the most common collectors for collecting sulfide minerals, but kerosene, nonpolar oil, emulsified oil, and other hydrocarbons can replace it to float the molybdenite or copper-molybdenite sulfide minerals (7)(8). Researchers pay much attention to copper and molybdenite flotation reagents because fit reagents utilization and dosage is beneficial for copper and molybdenite recovery and it is not easy to recover them.…”

Section: Introductionmentioning

confidence: 99%

Applying One-Stage Grinding and Flotation to Improving Copper Recovery of a Fine-Grained Cu-Mo Sulphide Ore

Bao-liang

Liu

Nie

et al. 2013

Separation Science and Technology

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This paper introduces the mineralogy of a fine-grained Cu-Mo sulphide ore, and the relationship between grinding fineness and flotation performance. Results show that the grinding fineness is a key factor affecting the recovery of copper and molybdenum. The result of one stage grinding and flotation is much better than that of grinding and flotation by stages, because an over grinding of chalcopyrite caused by regrinding of Cu-Mo bulk concentrate can be avoided. Finally, a simple flowsheet has been developed, that is, one-stage fine grinding of raw ore to 90% À0.074 mm, and a bulk flotation to produce a bulk concentrate by one-stage roughing, two stages of cleaning and one-stage scavenging, followed by three times of Cu-Mo flotation separation. When the feed contains 0.50% Cu and 0.19% Mo, the obtained copper and molybdenum concentrates assay 19.23% Cu and 48.53% Mo with the recoveries of 85.5% and 90.96%, respectively. INTRODUCTIONPorphyry copper deposits are the world's main source of copper and molybdenum. The recovery of molybdenum from porphyry copper ores by flotation is easily affected by particle morphology, inherent hydrophobicity and possible formation of slime coatings on it (1). It is essential to investigate all the factors before the molybdenum recovery process, and besides researching the particle morphology, researching the grinding fineness which affect particle size directly is a key to obtaining better flotation results.Generally, molybdenum in the form of molybdentie (MoS 2 ) and copper in the form of chalcopyrite (CuFeS 2 ) are recovered by two stages of grinding and separation. First, primary grinding is followed by a bulk flotation to enrich copper and molybdenum minerals in a bulk concentrate, and then the bulk concentrate is reground and separated by flotation (2-3). But an interesting phenomenon is that molybdenite recovery in the bulk flotation circuit is consistently lower than that of the copper sulphides as well as being far more variable (4) though molybdenite shows an excellent hydrophobicity. With the exception of the usual reasons like ore mineralogy, flotation reagents, and flowsheet which affect flotation indicators, the main reason leading to this phenomenon is grinding fineness as well as method.In the copper and molybdenite separation circuit, the molybdenite can usually be recovered first by depressing the copper and iron sulfide minerals with reagents like lignosulfonates under the high pH conditions (5), sodium sulfide, sodium silicate used as slime depressants, and pH modifier (6). Xanthate are the most common collectors for collecting sulfide minerals, but kerosene, nonpolar oil, emulsified oil, and other hydrocarbons can replace it to float the molybdenite or copper-molybdenite sulfide minerals (7-8). Researchers pay much attention to copper and molybdenite flotation reagents because fit reagents utilization and dosage is beneficial for copper and molybdenite recovery and it is not easy to recover them.It has been more than ten years since the Jiudingshan Cu-Mo mine (D...

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Enhanced flotation of sulfide fines using the emulsified oil extender technique

Cited by 39 publications

References 24 publications

Agglomeration-Flotation of Finely Ground Chalcopyrite and Quartz: Effects of Agitation Strength during Agglomeration Using Emulsified Oil on Chalcopyrite

Agglomeration-Flotation of Finely Ground Chalcopyrite and Quartz: Effects of Agitation Strength during Agglomeration Using Emulsified Oil on Chalcopyrite

Optimization of molybdenite flotation using response surface method

Applying One-Stage Grinding and Flotation to Improving Copper Recovery of a Fine-Grained Cu-Mo Sulphide Ore

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