The adsorption of sulfur dispersing agents on sulfur and nickel sulfide concentrate surfaces

Tong, Libin; Dreisinger, David

doi:10.1016/j.mineng.2008.12.006

Cited by 12 publications

(3 citation statements)

References 15 publications

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“…Higher recurrence of S 0 in TLR compared to in SHALR, as shown in the automated SEM analyses, indicates that there would be more elemental sulfur present in the TLR. This could be considered a potential problem for further noble metal extraction due to the tendency of elemental sulfur to coat Au and Ag particle surfaces, especially in oxidative leaching [24][25][26][27][28].…”

Section: Discussionmentioning

confidence: 99%

The Characterization of Residues Related to the Roasting– Leaching–Electrowinning Zinc Production Route for Further Metal Extraction

Hellgren,

Engström,

Sundqvist Öqvist

2024

Metals

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Super-hot acid leach residue is generated during zinc production in the roasting–leaching–electrowinning route, where both primary and secondary resources are used as feed material. This residue may contain valuable metals, such as lead, zinc, and iron, as well as precious metals, such as gold and silver. Four materials, namely super-hot acid leach residue, a residue formed when super-hot acid leach residue is selectively leached for lead with triethylenetetramine, as well as flotation concentrate, and flotation tailings formed in a selective silver flotation process with super-hot acid leach residue as the feed material were characterized to obtain a deeper understanding of possible further metal extraction. These four materials were characterized for chemical composition, mineralogy, and mineral distribution via chemical analyses, X-ray diffraction, and energy-dispersive scanning electron microscopy, respectively. The scanning electron microscope images showed that the materials have large variations in particle size distribution and composition. The results showed that the main lead phase in super-hot acid leach residue is lead sulfate, whereas it is mostly converted to lead sulfide during the selective lead leaching of the super-hot acid leach residue. The remaining lead sulfate is found in a solid solution with barium sulfate. Extracting lead from super-hot acid leach residue via triethylenetetramine leaching resulted in increased concentrations of gold and silver by 41% and 42%, respectively. The identified silver phases in super-hot acid leach residue may correspond to silver sulfide, silver chloride, and elementary silver, where silver sulfide was the most commonly occurring silver phase. After leaching this selectively for lead with triethylenetetramine, similar silver phases were identified, but silver sulfide and silver chloride occurred to a similar extent. Additionally, silver copper sulfide was detected. The presence of different silver phases might pose a challenge to reaching high silver recovery during leaching as the optimum leaching conditions differ somewhat. Furthermore, elemental sulfur, with a tendency to coat gold and silver particle surfaces, which is indicated to be present in all materials except the silver flotation tailings, may hinder metal extraction.

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Section: Discussionmentioning

confidence: 99%

The Characterization of Residues Related to the Roasting– Leaching–Electrowinning Zinc Production Route for Further Metal Extraction

Hellgren,

Engström,

Sundqvist Öqvist

2024

Metals

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“…Sulfur-sulfide pellets formation leads to decrease in leaching velocity [5,6]. The problem solution is surfactants usage that allows to decrease sulfide wetting by molten sulfur [7][8][9][10][11]. Due to surfactants usage residues after leaching are dispersed to optimal size and stabilized.…”

Section: Introductionmentioning

confidence: 99%

Sodium Lignosulfonate and Sodium Dodecyl-Sulfate Mixtures Influence on Zinc Concentrate Pressure Leaching and Zinc Electro-Winning

Kolmachikhina

Рыжкова

Dmitrieva

2020

SSP

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This paper is describing an investigation of sodium lingo-sulfonate and sodium dodecyl-sulfate mixtures influence on zinc concentrates high temperature oxidative pressure leaching and zinc electro-winning. For this purpose, surfactants concentration at leaching tests was varied from 200 to 800 mg∙l-1. It was established that the maximum zinc extraction (99 %) at leaching was achieved in the presence of mixture containing 800 mg∙l-1 lignosulfonate and 200 mg∙l-1 sodium dodecyl-sulfate. Therefore, this mixture can be recommended for high temperature oxidative pressure leaching of zinc concentrates. Sulfur-sulfide pellets formation also was observed at a low lingo-sulfonate concentration (200 mg∙l-1) in a mixture with sodium dodecyl-sulfate. This phenomenon can lead to emergency shut down of autoclave. It was observed that the mixture usage of 800 mg∙l-1 lignosulfonate and 200 mg∙l-1 sodium dodecyl-sulfate had no significant impact on zinc current efficiency, it was in the rage of 92-93 %. The mixture usage of 200 mg∙l-1 lignosulfonate and 600 mg∙l-1 sodium dodecyl-sulfate allowed to increase current efficiency up to 95 %. Increasing sodium dodecyl-sulfate concentration in mixtures with lignosulfonates leads to decrease of current efficiency, to formation of deep pores and defects on cathode zinc surface.

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“…Problems of response surface blocking by sulfur and pellet formation can be eliminated by addition of surfactants, which change minerals wetting characteristics and sulfur properties. Lignosulfonates and petroleum-organic reagents can be used for controlling of these phenomena [8][9][10]. However, lignosulfonate usage at leaching leads to increase zinc dust consumption at solution purification from copper, nickel, cobalt, chlorine and current efficiency going down to 75-78 % [11,12].…”

Section: Introductionmentioning

confidence: 99%

Surfactants Influence on Sphalerite Wetting during Zinc Concentrate Pressure Leaching

Khazieva

Свиридов

Naboychenko

et al. 2017

SSP

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This paper describes an investigation of the surfactant influence on zinc sulfide wetting and the pressure leaching of zinc concentrates. For this, a variety of anionic and cationic surfactants with different chemical structures were tested. The methodology for mineral preferential wettability determination via establishing correlation between the spreading coefficients was proposed. It allows determining the surfactant potential efficiency. The influence of contrastively functional reagents on zinc concentrate pressure leaching was reviewed. It is found that simultaneous usage of stabilizers and dispersing agents allows enhancing zinc extraction, eliminating pellet formation at lower reagent consumptions. The beneficial effect of surfactant mixture was seen through the increased zinc sulfide wetting by solution and colloid protection of sulfur particles via solvate-adsorption and structural factor of stabilization. The optimal composition of surfactant mixture was proposed and allowed to extract 95 % of zinc along with pellet formation elimination.

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The adsorption of sulfur dispersing agents on sulfur and nickel sulfide concentrate surfaces

Cited by 12 publications

References 15 publications

The Characterization of Residues Related to the Roasting– Leaching–Electrowinning Zinc Production Route for Further Metal Extraction

The Characterization of Residues Related to the Roasting– Leaching–Electrowinning Zinc Production Route for Further Metal Extraction

Sodium Lignosulfonate and Sodium Dodecyl-Sulfate Mixtures Influence on Zinc Concentrate Pressure Leaching and Zinc Electro-Winning

Surfactants Influence on Sphalerite Wetting during Zinc Concentrate Pressure Leaching

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