Physicochemical Regularities of the Pressure Leaching of a Zinc Sulfide Concentrate in the Presence of Lignosulfonate

Pressure leaching is one of the most high-demanded and promising hydrometallurgical technology, which allows one to obtain high efficiency. Taking into account the shutdown of zinc plant in Vladikavkaz («Electrozinc, Lls.») searching the modern methods of zinc production is of current interest. In this work, the issue was observed on influence of temperature and sodium lignosulfonate (SL) onto the zinc and iron sulfides behavior during pressure leaching of zinc sulfide concentrate from the Uchalinsk deposit. Temperature increasing from 130 to 150oC led to decreasing of zinc extraction and sulfur-sulfide pellets formation; that indicated increasing the zinc sulfide wettability by the molten sulfur due to reduction of viscosity and surface tension of molten sulfur. Increasing the LSN dosage promoted running up of the absolute value of the zinc extraction. The highest growth of the zinc extraction (17.39 %) was obtained at 0.2 g/dm3 LSN. Further increasing of the LSN concentration on 0.2 g/dm3 (up to 0.4, 0.6, 0.8 g/dm3) led to double decrease of their effectiveness in reference to previous LSN concentration.

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INVESTIGATION OF COMBINED SURFACTANT APPLICATION POSSIBILITY UNDER ZINC SULFIDE CONCENTRATE PRESSURE LEACHING

Proceedings of Irkutsk State Technical University ◽

10.21285/1814-3520-2016-9-147-155 ◽

2016 ◽

Vol 20 (9) ◽

pp. 147-155

Author(s):

Elvira Khazieva ◽

◽

Stanislav Naboychenko ◽

Vladislav Sviridov ◽

◽

...

Keyword(s):

Zinc Sulfide ◽

Pressure Leaching ◽

Sulfide Concentrate

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Features of structure state and magnetic properties of mono- and polycrystalline LiNiPO4 and LiNi0.9Co0.1PO4

VIII Information school of a young scientist Central Scientific Library of the Urals Branch of the Russian Academy of Science ◽

10.32460/ishmu-2020-8-0005 ◽

2020 ◽

Author(s):

M.A. Semkin ◽

◽

N.B. Urusova ◽

A.N. Pirogov ◽

◽

...

Keyword(s):

Zinc Sulfide ◽

High Efficiency ◽

Pressure Leaching ◽

Iron Sulfides ◽

Zinc Extraction ◽

Sodium Lignosulfonate ◽

Zinc Plant ◽

Structure State ◽

Molten Sulfur ◽

Sulfide Concentrate

Pressure leaching is one of the most high-demanded and promising hydrometallurgical technology, which allows one to obtain high efficiency. Taking into account the shutdown of zinc plant in Vladikavkaz («Electrozinc, Lls.») searching the modern methods of zinc production is of current interest. In this work, the issue was observed on influence of temperature and sodium lignosulfonate (SL) onto the zinc and iron sulfides behavior during pressure leaching of zinc sulfide concentrate from the Uchalinsk deposit. Temperature increasing from 130 to 150o C led to decreasing of zinc extraction and sulfur-sulfide pellets formation; that indicated increasing the zinc sulfide wettability by the molten sulfur due to reduction of viscosity and surface tension of molten sulfur. Increasing the LSN dosage promoted running up of the absolute value of the zinc extraction. The highest growth of the zinc extraction (17.39 %) was obtained at 0.2 g/dm3 LSN. Further increasing of the LSN concentration on 0.2 g/dm3 (up to 0.4, 0.6, 0.8 g/dm3 ) led to double decrease of their effectiveness in reference to previous LSN concentration.

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Distinct Roles of Acidophiles in Complete Oxidation of High-Sulfur Ferric Leach Product of Zinc Sulfide Concentrate

Microorganisms ◽

10.3390/microorganisms8030386 ◽

2020 ◽

Vol 8 (3) ◽

pp. 386 ◽

Cited By ~ 3

Author(s):

Maxim Muravyov ◽

Anna Panyushkina

Keyword(s):

Microbial Community ◽

Zinc Sulfide ◽

Elemental Sulfur ◽

Waste Product ◽

Sulfur Oxidation ◽

Low Grade ◽

Sulfide Concentrates ◽

Sulfide Concentrate ◽

Elemental Sulfur Oxidation ◽

Ferric Leaching

A two-step process, which involved ferric leaching with biologically generated solution and subsequent biooxidation with the microbial community, has been previously proposed for the processing of low-grade zinc sulfide concentrates. In this study, we carried out the process of complete biological oxidation of the product of ferric leaching of the zinc concentrate, which contained 9% of sphalerite, 5% of chalcopyrite, and 29.7% of elemental sulfur. After 21 days of biooxidation at 40 °C, sphalerite and chalcopyrite oxidation reached 99 and 69%, respectively, while the level of elemental sulfur oxidation was 97%. The biooxidation residue could be considered a waste product that is inert under aerobic conditions. The results of this study showed that zinc sulfide concentrate processing using a two-step treatment is efficient and promising. The microbial community, which developed during biooxidation, was dominated by Acidithiobacillus caldus, Leptospirillum ferriphilum, Ferroplasma acidiphilum, Sulfobacillus thermotolerans, S. thermosulfidooxidans, and Cuniculiplasma sp. At the same time, F. acidiphilum and A. caldus played crucial roles in the oxidation of sulfide minerals and elemental sulfur, respectively. The addition of L. ferriphilum to A. caldus during biooxidation of the ferric leach product proved to inhibit elemental sulfur oxidation.

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Study of ZnO Neutralization & Iron-Precipitation Test in Zn Concentrate Pressurization and Lixiviation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.968.138 ◽

2014 ◽

Vol 968 ◽

pp. 138-141

Author(s):

Ting Xi Zhou ◽

Jin Hui Peng ◽

Zhi En Kuang ◽

Ji Kun Wang

Keyword(s):

Zinc Sulfide ◽

Iron Removal ◽

Optimal Parameters ◽

Time Duration ◽

Iron Precipitation ◽

Sulfide Concentrate ◽

Precipitation Test

The effect of ZnO dosage, iron remover and the time duration of neutralization and iron-precipitation on iron removal percentage was investigated to find out the optimal parameters in the technique of ZnO pressurization, neutralization and iron removal, and the residual acid from pressurization lixiviation and neutralization was assayed by using ZnO ore to neutralize and remove iron from lixiviated mineral pulp containing residual acid 20 g/l by simulation of Zn concentrate pressurization and lixiviation in a 2 L autoclave, in order to simplify Zinc pressurization process. The result showed that when Zn lixiviation percentage is higher than 98 %, up to 99.74 % of iron in the lixiviation fluid could be precipitated and the lixiviated fluid contains iron at the level of 20 mg/l, meeting the requirement on pre-purification fluid. Keywords: Zinc Sulfide Concentrate; Pressurization and Lixiviation; ZnO Ore; Neutralization and Iron Precipitation

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Oxidative Roasting of Low Grade Zinc Sulfide Concentrate from Gagok Mine in Korea

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.m2010045 ◽

2010 ◽

Vol 51 (8) ◽

pp. 1481-1485 ◽

Cited By ~ 6

Author(s):

Byung-Su Kim ◽

Soo-Bock Jeong ◽

Young-hun Kim ◽

Hyung-Seok Kim

Keyword(s):

Zinc Sulfide ◽

Low Grade ◽

Oxidative Roasting ◽

Sulfide Concentrate

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Enriching Indium Using Neutralization from Solution Bearing Indium

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2952 ◽

2011 ◽

Vol 287-290 ◽

pp. 2952-2956

Author(s):

Yong Gang Li ◽

Da Jin Yang ◽

Jian Rong Peng ◽

Xiao Ying Li

Keyword(s):

Sulfuric Acid ◽

Optimal Condition ◽

Zinc Sulfide ◽

Recovery Rate ◽

Acid Leaching ◽

Sulfide Mineral ◽

Optimal Dosage ◽

Sulfuric Acid Leaching ◽

Leaching Solution ◽

Sulfide Concentrate

An experimentation project has been put forward to enrich indium from sulfuric acid leaching solution bearing high content of indium: preneutralization using calcine---reduction using zinc sulfide concentrate---neutralization using limestone for precipitating indium, and ascertained optimal dosage of reagent in every procedure through experiment under certain condition: the dosage of calcine is 1.3 times of theoretic value, the dosage of zinc sulfide mineral concentrate is 2.2～2.3 times of theoretic value, the dosage of limestone is double of theoretic value. On this optimal condition, the straight recovery rate of indium is more than 97%, and the content of indium sediment from precipitating is more than 0.1%.

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