Iron removal during oxidative, acid pressure leaching of a zinc sulphide concentrate

1989 ◽  
Vol 25 (3-4) ◽  
pp. 241-260 ◽  
Author(s):  
Fiona M. Doyle ◽  
Hernando Arauco ◽  
Lucia M. Feng
Keyword(s):  
Zinc Sulphide ◽  
Iron Removal ◽  
Pressure Leaching

Kinetics of iron removal from metallurgical grade silicon with pressure leaching

Rare Metals ◽  
2011 ◽  
Vol 30 (6) ◽  
pp. 688-694 ◽  
Author(s):  
Zhanliang Yu ◽  
Keqiang Xie ◽  
Wenhui Ma ◽  
Yang Zhou ◽  
Gang Xie ◽  
...  
Keyword(s):  
Iron Removal ◽  
Pressure Leaching ◽  
Metallurgical Grade Silicon ◽  
Grade Silicon ◽  
Kinetics Of

Static wetting angles of water and sulphur at the zinc sulphide surface modified with anionic surfactants and their combinations

2021 ◽  
pp. 29-34
Author(s):  
E. B. Kolmachikhina ◽  
T. N. Lugovitskaya ◽  
K. D. Naumov
Keyword(s):  
Sodium Dodecyl ◽  
Zinc Sulphide ◽  
Wetting Angle ◽  
Elemental Sulphur ◽  
Work Of Adhesion ◽  
Pressure Leaching ◽  
Russian Science ◽  
Pure Zinc ◽  
Wetting Ability ◽  
Surface Modified

This paper looks at the effect produced by surface modification of the super pure zinc sulphide monocrystals with certain surfactants and their combinations (sodium lignosulphonate (SLS), sodium dodecyl sulphate (SDS), sodium dodecylbenzenesulphonate (SDBS) and the following combinations: SLS + SDS, SLS + SDBS on the surface angle of wetting with water and elemental sulphur melt. It was found that as the concentration of individual surfactants in the solution rose, so did the wetting ability of the mineral surface. Thus, at the surfactant concentration of 0.8 g/dm3 the water wetting angle reaches 48.4o for SLS, 22.5o for SDS and 10.3o for SDBS; the elemental sulphur wetting angle is 71.3o for SLS, 76.9o for SDS and 67.9o for SDBS. The work of adhesion in the system ZnS – Surfactant – Н2О increases by 9–11%, and in the system ZnS – Surfactant – S0 — by 5–8%. When using the combinations SLS + SDS (СSLS = 0.2–0.8 g/dm3) and SLS + SDBS (СSLS = 0.2 g/dm3), inverse surface wetting of zinc sulphide with elemental sulphur melt is observed. The maximum wetting angles reached are 93o and 85o, correspondingly. The work of adhesion and the spreading coefficient expectedly decrease. The paper analyzes the effect of individual surfactants and their combinations on the pressure leaching of zinc sulphide concentrate. The use of individual surfactants intensifies the transition of valuable components into the solution. The biggest increase in recovery was seen when using SLS, and namely 27–32% for zinc and 11–16% for copper. The recovery of zinc increased by 31–41% in the presence of SLS + SDS and by 27–34% in the presence of SLS + SDBS. This research was funded by the Russian Science Foundation, Grant No. 18-19-00186.

scholarly journals Effects of Various Precipitants on Iron Removal from a Zinc Concentrate Pressure Leaching Solution

Minerals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 84
Author(s):  
Claudio A. Leiva ◽  
María E. Gálvez ◽  
Gerardo E. Fuentes ◽  
Claudio A. Acuña ◽  
Jannan A. Alcota
Keyword(s):  
Iron Concentration ◽  
High Viscosity ◽  
Ease Of Use ◽  
Iron Removal ◽  
Pressure Leaching ◽  
Zinc Recovery ◽  
Autoclave Leaching ◽  
Environmentally Friendly Process ◽  
Filtration Stage ◽  
Zinc Concentrate

Autoclave leaching of zinc concentrate (Sphalerite) is an environmentally friendly process compared to roasting, which discharges pollutants into the atmosphere. Due to the amount of iron in the final product, a study is proposed to evaluate different reagents for eliminating iron from the autoclave outcome, minimizing Zn losses. The colloid formation, zinc losses, iron removal, phase separation stage characteristics (sedimentation and filtering), and reagent costs were used to evaluate six-iron precipitating reagents: CaO, Na2CO3, CaCO3, NaOH, MgO, and Ca(OH)2. CaO shows 99.5% iron removal and 87% zinc recovery. Although CaO was one of the reagents with significant zinc recovery, it presented operational difficulties in the filtration stage due to the high viscosity of the mixtures. Finally, Ca(OH)2 is the reagent recommended due to its ease of use, zinc yield recovery, electrowinning efficiency, and iron precipitate filtration rate. Zinc recovery was above 80%, while the iron concentration in the solution was below 50 ppm.

Electro-optical detection of terahertz radiation in a zinc sulphide crystal at a wavelength of 512 nm

2020 ◽  
Vol 13 (11) ◽  
pp. 112007
Author(s):  
Joel Edouard Nkeck ◽  
Xavier Ropagnol ◽  
Riad Nechache ◽  
François Blanchard
Keyword(s):  
Terahertz Radiation ◽  
Optical Detection ◽  
Zinc Sulphide

Optical Properties of Zinc Sulphide Thin Films Coated with Aqueous Organic Dye Extract for Solar and Optoelectronic Device Applications

2021 ◽  
Vol 50 (5) ◽  
pp. 2576-2583
Author(s):  
Uche Paul Onochie ◽  
Sunday Chukwuyem Ikpeseni ◽  
Anthony Egwu Igweoko ◽  
Hilary Ijeoma Owamah ◽  
Chinecherem Collins Aluma ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Optoelectronic Device ◽  
Zinc Sulphide ◽  
Organic Dye ◽  
Device Applications
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