Chalcopyrite leaching in novel lixiviants

Barton, Isabel F.; Hiskey, J. B.

doi:10.1016/j.hydromet.2021.105775

Cited by 39 publications

(14 citation statements)

References 102 publications

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“…구리는 전기특성이 우수하고 가공하기 용이하여 구리 사용량의 60%가 전선으로 사용되고 있으며 1) , 리튬이온 전지의 음극재를 고정하는 동박으로 최근 수요량이 증가 하고 있다. 구리는 주로 황동석(Chalcopyrite, CuFeS 2 )을 비롯한 구리 황화광의 정광을 건식제련공정으로 처리하 여 전기동을 생산하며, 황동석은 세계 구리 매장량의 약 70%를 차지한다 [2][3][4] . 건식제련공정은 SO 2 의 배출과 고가 의 건설 경비가 단점으로 지적되어 왔으며, 비소 등 불순물 함유량 상승으로 황동석의 저품위화가 심화되고 있다 5) .…”

Section: 서 론unclassified

Effects of Chloride and Surfactant Addition on the Copper Leaching During Medium-temperature Pressure Leaching of Chalcopyrite

Lim,

Kim,

Kim

et al. 2023

Resour. Recycl.

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When the pressure leaching process of chalcopyrite is operated in the low and medium temperature range of 90℃~150℃, the sulfur component in chalcopyrite is converted to elemental sulfur, which suppresses the leaching of copper. In the present study, the copper leaching rate was improved by adding chloride ions and surfactants during the medium-temperature pressure leaching process at 150℃. Using the autoclave equipped with a 2L reactor made of titanium, a pressure leach tests were conducted for 180 min using 100g of chalcopyrite concentrate with D 90 particle sizes of 10μm and 45μm in 5g/L and 50g/L sulfuric acid solutions. At 50g/L sulfuric acid solution without chloride ion and surfactant, when a sample with a D 90 particle size of 45μm was used, the copper leaching efficiency after 180 min was 48%. As a result of leaching by adding 12g/L of chloride ions such as HCl, CuCl 2 , and NaCl, the leaching efficiencies increased to 96% and 97%, respectively, by adding HCl and CuCl 2 . As a result of a pressure leaching tests by adding surfactants of SLS (Sodium lignosulfonate) and CLS (calcium

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Section: 서 론unclassified

Effects of Chloride and Surfactant Addition on the Copper Leaching During Medium-temperature Pressure Leaching of Chalcopyrite

Lim,

Kim,

Kim

et al. 2023

Resour. Recycl.

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“…Recent studies have shown the behavior of chalcopyrite concentrates on alkaline leaching media (60 • C in 300 min when the chlorine sparging rate was 0.69 mmol min −1 , the pulp density was 10 g/L, and the pH of the solution was 11−12.7), which transform 93.8% of chalcopyrite to tenorite [22]. A recent review of new reagents for chalcopyrite leaching includes a description of leaching with ionic liquids, a class of solvents primarily based on imidazolium (C 3 H 5 N 2 ) with extraction rates of up to 98%.…”

Section: Introductionmentioning

confidence: 99%

Selective Leaching of Arsenic from Copper Concentrates in Hypochlorite Medium

Hernández,

Benavente,

Roca

et al. 2023

Minerals

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The selective leaching of arsenic using sodium hypochlorite was evaluated in order to reduce its concentration in a copper concentrate. The best conditions achieved in the synthetic concentrate were applied to the industrial concentrate. First, the individual behaviors of pure samples of enargite and chalcopyrite were evaluated under a hypochlorite medium. The enargite reaction is significantly faster than chalcopyrite, allowing for greater selectivity to ClO− (0.1–0.3 M), pH 12–12.5; 20 to 40 °C, reaction time <60 min. Under these conditions, the reagent consumption for pure compounds approaches the stoichiometric consumption and presents a selectivity factor of 5/1. Furthermore, concentrate leaching in a sodium hypochlorite medium, containing enargite, releases arsenic ions into the solution, while copper and iron remain in the solid phase, as CuO and Fe(OH)3, respectively. A novel copper concentrate cleaning process by selective leaching is proposed, which transforms unacceptable copper concentrate for smelters (>0.5%As) into clean concentrates (<0.2%As) or low penalty concentrates (0.2 < %As < 0.5). The estimated consumption for the cleaning process is in the order of 0.4–0.6 kg Cl2 equivalent per kg of concentrate.

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“…La extracción hidrometalúrgica de cobre a partir de calcopirita se considera más económica y amigable con el medio ambiente que la extracción pirometalúrgica, especialmente cuando los minerales de sulfuro que contienen cobre presente en menas de baja ley [5]. El procesamiento del cobre a partir de este tipo de sulfuros de baja ley es limitado debido a la naturaleza refractaria durante la lixiviación de la calcopirita [6]; por lo que, actualmente se utilizan procesos de tratamiento de minerales con la finalidad de obtener un concentrado de cobre que es tratado por la vía pirometalúrgica hasta la obtención del cobre metálico. El principio químico para la extracción convencional de cobre a partir de CuFeS2 es la oxidación selectiva de los iones sulfuro (S) con oxígeno para la formación de dióxido de azufre (SO2) en forma gaseosa y cobre metálico como producto.…”

Section: Introductionunclassified

Lixiviación de calcopirita con ácido etilendiaminotetraacético (EDTA) en medio oxidante

Mendez-Velasco¹,

Choque

Fuentes-Rubio³

et al. 2023

Epistemus

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El cobre en la naturaleza se presenta en forma predominante como complejos sulfurados, calcopirita (CuFeS2), bornita (Cu5FeS4) y calcosina (Cu2S). La recuperación de cobre a partir de calcopirita por lixiviación es un proceso complicado debido a la estabilidad química de este mineral y conlleva el uso de sistemas complejos para el tratamiento en tiempos prolongados. En este trabajo se presenta una alternativa para la lixiviación de calcopirita a condiciones contraladas con la finalidad de evaluar el efecto pH, concentración de EDTA y peróxido de hidrógeno para la recuperación de cobre. Con ayuda de un diseño factorial se busca optimizar el proceso de recuperación de cobre con una menor disolución de hierro. De acuerdo con los resultados experimentales, una baja concentración de EDTA (0.0006 M) promueve la disolución selectiva de cobre (20.04%) y una baja disolución hierro (0.2%) a pH 4.5 y temperatura ambiente.

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Chalcopyrite leaching in novel lixiviants

Cited by 39 publications

References 102 publications

Effects of Chloride and Surfactant Addition on the Copper Leaching During Medium-temperature Pressure Leaching of Chalcopyrite

Effects of Chloride and Surfactant Addition on the Copper Leaching During Medium-temperature Pressure Leaching of Chalcopyrite

Selective Leaching of Arsenic from Copper Concentrates in Hypochlorite Medium

Lixiviación de calcopirita con ácido etilendiaminotetraacético (EDTA) en medio oxidante

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