Leaching of pyrite with hydrogen peroxide in sulphuric acid

Antonijević, Milan M.; Dimitrijević, Mirjana; Janković, Z.

doi:10.1016/s0304-386x(96)00096-5

Cited by 120 publications

(58 citation statements)

References 12 publications

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“…In the leaching tests, tin was oxidized with hydrogen peroxide as the following equation. 10,11) As shown in Fig. 7, tin concentration increased to 27090 g·m ¹3 in the leaching test with 3% pulp density, and the leaching efficiencies of tin increased to more than 99% regardless of pulp density.…”

Section: ¹3mentioning

confidence: 91%

Separation of Tin, Silver and Copper from Waste Pb-free Solder Using Hydrochloric Acid Leaching with Hydrogen Peroxide

Kim

Lee

et al. 2014

Mater. Trans.

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The waste lead (Pb)-free solder leaching process in hydrochloric acid (HCl) solution with hydrogen peroxide (H 2 O 2 ) followed by separation of copper (Cu) and tin (Sn) was investigated to separate tin, silver (Ag), and copper as an individual component from waste Pb-free solder. The dissolution of Sn increased with increasing temperature and HCl concentration. ) of Cu could be removed successfully from the leach solution with Sn under the following conditions; 30°C in temperature; 400 rpm in agitation speed; 0.3 ml min ¹1 in N 2 flow rate; 0.1 g Sn powder addition to 100 cm 3 leach solution.

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Section: ¹3mentioning

confidence: 91%

Separation of Tin, Silver and Copper from Waste Pb-free Solder Using Hydrochloric Acid Leaching with Hydrogen Peroxide

Kim

Lee

et al. 2014

Mater. Trans.

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“…In another study, the rate of oxidation by hydrogen peroxide in acidic sulphate solutions was found to decrease with increasing sulphate concentration (Antonijevic et al, 1997).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

The effect of sulphate ions and temperature on the leaching of pyrite. III. Bioleaching

Basson¹,

Gericke²,

Grewar³

et al. 2013

Hydrometallurgy

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The effect of the total sulphate concentration on the rate of pyrite dissolution was investigated in batch, bioleach tests on a high-grade concentrate at 35°C, 50°C and 65°C.Good microbial activity was achieved for concentrations up to 42 g/L sulphate.However, higher concentrations resulted in decreased ferrous oxidation kinetics, with the solution potential profiles showing "lag periods" at the highest sulphate concentration.The bioleach results showed that the rate of pyrite dissolution decreased markedly above an average sulphate concentration of 55 g/L for all three temperatures, with the adverse effect on the dissolution kinetics being more pronounced at 50°C and 65°C.As a result of this, increased temperature has no beneficial effect on the rate of dissolution at concentrations of sulphate above 55 g/L.High extents of pyrite dissolution (90% to 98%) were achieved at all three temperatures irrespective of sulphate concentration, with almost identical extents of sulphide oxidation.Rates of pyrite dissolution under bioleaching conditions agree well with those derived under similar conditions from abiotic dissolution experiments and electrochemical measurements. This important observation confirms the so-called indirect mechanism A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTfor the bioleaching process in the case of pyrite and also that the mixed potential model can be used to quantitatively describe both abiotic and biotic dissolution of pyrite in acidic solutions.

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“…As known, temperature increases reaction rate and equilibrium constant. However, rapid decomposition of hydr ogen peroxide occurs at higher temperatures (Antonijevic et al, 1997;Mahajan et al, 2007). Figure 5 shows the effect of acid concentration on the S/N ratio for extraction of nickel from lateritic ore in hydrochloric acid solution with hydrogen peroxide.…”

Section: Temperaturementioning

confidence: 99%

“…As seen from Figure 5, it was determined that the optimum hydrochloric acid concentration was 3 M. The results presented in Figure 5 show that, S/N ratio values increase as acid concentration increases. Aydogan (2006) and Antonijevic et al (1997) expressed that hydrogen peroxide shows oxidative action in acidic solutions. …”

Section: Temperaturementioning

confidence: 99%

Optimization of Nickel Extraction From Lateritic Ore in Hydrochloric Acid Solution With Hydrogen Peroxide by Taguchi Method

Aras¹,

Agacayak²

2017

Scitech

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Taguchi optimization method was used to determine optimum conditions for the extraction of nickel from lateritic ore in hydrochloric acid solution with hydrogen peroxide. Leaching time, stirring speed, temperature, hydrochloric acid concentration and hydrogen peroxide concentration were chosen as parameters. The optimum conditions for dissolution w ere found as leaching time of 240 min, a temperature of 70°C, hydrochloric acid concentration of 3 M, hydrogen peroxide concentration of 0.1 M and without stirring. The experimental results under optimum leaching conditions, showed that the extraction of nickel from lateritic ore was 90.66%. Analysis of variance (ANOVA) was applied to experimental results. Percentage contributions of each factor for the extraction of nickel were determined. Key Words: Leaching, Lateritic ore, Nickel; Hydrochloric acid, Hydrogen peroxide; Taguchi method Nikelin Lateritik Cevherden Hidrojen Peroksitli Hidroklorik Asit Çözeltisinde ÇözündürülmesininTaguchi Yöntemiyle Optimizasyonu ÖZ: Nikelin lateritik cevherden hidrojen peroksitli hidroklorik asit çözeltisinde çözündürülmesinin optimum koşullarını belirlemek için Taguchi optimizasyon yöntemi kullanılmıştır. Deney parametreleri olarak, süre, karıştırma hızı, sıcaklık, hidroklorik asit derişimi ve hidrojen peroksit derişimi seçilmiştir. Çözündürme için optimum koşullar, karıştırma yapılmadan, 240 dakika liç süresi, 70 °C sıcaklık, 3 M hidroklorik asit derişimi ve 0.1 M hidrojen peroksit derişimi olarak bulunmuştur. Optimum koşullarda yapılan deney sonuçları, nikelin lateritik cevherden çözündürülmesinin %90.66 olduğunu göstermiştir. Deney sonuçlarına varyans analizi (ANOVA) uygulanmış ve her faktörün nikel çözündürülmesine olan katkısı belirlenmiştir.

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Leaching of pyrite with hydrogen peroxide in sulphuric acid

Cited by 120 publications

References 12 publications

Separation of Tin, Silver and Copper from Waste Pb-free Solder Using Hydrochloric Acid Leaching with Hydrogen Peroxide

Separation of Tin, Silver and Copper from Waste Pb-free Solder Using Hydrochloric Acid Leaching with Hydrogen Peroxide

The effect of sulphate ions and temperature on the leaching of pyrite. III. Bioleaching

Optimization of Nickel Extraction From Lateritic Ore in Hydrochloric Acid Solution With Hydrogen Peroxide by Taguchi Method

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