Selection of an appropriate acid type for the recovery of zinc from a flotation tailing by the analytic hierarchy process

Kurşunoğlu, Sait; Kursunoglu, Nilufer; Hussaini, Shokrullah; Kaya, Muammer

doi:10.1016/j.jclepro.2020.124659

Cited by 30 publications

(10 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rather, the low dissolution was likely caused by the precipitation of the insoluble contents of the metal oxalates exhausting the dissolved the metal ions by the oxalic acid. It is speculated that the observed high leaching efficiency of using critic acid is contingent upon the chemical reactivity of the metals towards the acid [13]. At 25 • C, citric acid has three carboxyl groups, and each group has its own dissociation constant for the three protons that are present as follows: pK a1 = 3.13, pK a2 = 4.76, and pK a3 = 6.40.…”

Section: Effect Of Organic Acid On Dissolution Of the Mhp Samplementioning

confidence: 99%

Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt Hydroxide Precipitate Using Organic Acids

Hussaini,

Tita,

Kursunoglu

et al. 2024

Minerals

Self Cite

View full text Add to dashboard Cite

Nickel (Ni) and cobalt (Co) are strategic metals that have found applications in a wide range of metallurgical and industrial uses. In this study, the dissolution of a mixed nickel–cobalt hydroxide precipitate using organic acids (citric, oxalic, and malic acid) was investigated. Citric acid was found to be the best leaching agent yielding the following dissolution rates: 91.2% Ni, 86.8% Co, and 90.8% Mn. Oxalic acid resulted in low dissolution, which is likely due to the formation of insoluble metal oxalates. The impact of acid concentration, leaching time, and temperature on metal dissolution was systematically examined. The optimal dissolution conditions were identified as 0.5 M citric acid at 30 °C for 30 min, utilizing a 1/20 solid/liquid ratio and a stirring speed of 400 revolutions per minute (rpm). The attempt to use oxidants, such as potassium permanganate (KMnO4) and hydrogen peroxide (H2O2), to achieve selective dissolution in an organic acid environment was not successful, which was different from that in the sulfuric acid case. As for the leaching kinetics in the organic acids, it seems that the leaching of Ni correlates with the Shrinking Core Model, specifically regarding porous-layer diffusion control. Based on the experimental results, the activation energy for the leaching of Ni was estimated to be 3.1 kJ/mol.

show abstract

Section: Effect Of Organic Acid On Dissolution Of the Mhp Samplementioning

confidence: 99%

Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt Hydroxide Precipitate Using Organic Acids

Hussaini,

Tita,

Kursunoglu

et al. 2024

Minerals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Due to the ease of separating sulfides from gangue minerals with conventional flotation methods, zinc sulfide ores are currently the main material for the production of zinc [7]. However, with the increasing demand for zinc and shortage of high-grade zinc sulfide resources with exploitable value worldwide, meeting the production demand using only zinc sulfide resources became difficult [8,9]. Thus, the industrial production of zinc using zinc oxide ore has gradually become an inevitable way for the development of non-ferrous metallurgy [10,11].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Leaching Kinetics of Zinc from Smithsonite in Ammonium Citrate Solution

Chen,

Wu,

Wang

2024

Metals

View full text Add to dashboard Cite

In this study, the response surface method is used to develop a model for analyzing and optimizing zinc leaching experiments. An investigation into the leaching kinetics of smithsonite in ammonium citrate solution is also conducted. A model of kinetics is studied in order to represent these effects. The experimental data show that an increase in the solution temperature, concentration, and stirring speed has a positive impact on the leaching rate, while an increase in the particle size has a negative impact on it. The optimal experimental conditions consist of a leaching temperature of 70 °C, ammonium citrate concentration of 5 mol/L, particle size of 38 µm, and rotational speed of 1000 rpm. Under these optimal conditions, the leaching rate of zinc from smithsonite is 83.51%. It is speculated that the kinetic model will change when the temperature is higher than 60 °C. When the temperature is lower than 60 °C, the leaching process is under the control of the shrinking core model of the surface chemical reactions. The calculated activation energy of the leaching reaction is equal to 42 kJ/mol. The model of the leaching process can be described by the following equation: 1−1−x1/3=k0⋅(C)0.6181⋅r0−0.5868⋅SS0.6901exp⁡−42/RT]t. This demonstrates that an ammonium citrate solution can be used in the leaching process of zinc in smithsonite as an effective and clean leaching agent.

show abstract

“…There are hydrochemical methods of enrichment, which allow increasing the recovery of metals up to 90%. However, these processes are distinguished by significant specific costs due to their multi-stage nature, high consumption of expensive and aggressive reagents, and also require the use of corrosion-resistant equipment [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Technology of high-temperature sulfidizing roasting of oxidized lead-zinc ore in a fluidized bed furnace

Chepushtanova¹,

Merkibayev²,

Baigenzhenov³

et al. 2023

nfm

View full text Add to dashboard Cite

Zinc and lead are one of the most used metals in the world. The average annual growth rate of the zinc market is about 3.5%. Half of the zinc consumed in the world is used as electroplating, more than 30% is spent on the production of zinc alloys, including for the production of brass and bronze. At present, polymetallic ores are the main raw material for the production of lead and zinc. The production technology includes flotation enrichment of the initial ore raw material with subsequent pyrometallurgical or hydrometallurgical processing of the resulting concentrates. Unfortunately, the reserves of well-enriched sulfide ores are declining, which leads to the need to involve mixed and oxidized ores in the production. Obtaining zinc is also a relatively expensive process, one of the stages of which is the roasting of zinc sulfide concentrates in a fluidized bed furnace using oxygen-enriched air blast. In this regard, technologies aimed at processing hard-to-cut oxidized lead-zinc ores, as well as improving the process of roasting in a fluidized bed, are topical and in demand today. The article presents the technology and method for processing oxidized lead-zinc ore, including high-temperature sulfidizing roasting of oxidized compounds of lead and zinc, the results of roasting carried out in the presence of a high-sulfur sulfidizing agent in the form of pyrite (sulfur content is 45.15%), at molar ratios of metal oxide to pyrite NZnO/NFeS 2 and NPbO/NFeS 2 equal to 0.1-0.14 for sulfidizing in an air-blown fluidized bed furnace at a flow rate of 10 to 20 l/min, at a temperature of 750-800 °C, with a roasting time of 30-45 minutes. As a result of sulfidizing roasting, the degree of sulfidization reaches 88%, and the subsequent extraction of zinc from the non-magnetic fraction into a froth product in an open flotation cycle is 90% with a content of 23.4% zinc.

show abstract

Selection of an appropriate acid type for the recovery of zinc from a flotation tailing by the analytic hierarchy process

Cited by 30 publications

References 29 publications

Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt Hydroxide Precipitate Using Organic Acids

Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt Hydroxide Precipitate Using Organic Acids

Investigation of the Leaching Kinetics of Zinc from Smithsonite in Ammonium Citrate Solution

Technology of high-temperature sulfidizing roasting of oxidized lead-zinc ore in a fluidized bed furnace

Contact Info

Product

Resources

About