Current situation and forecast of environmental risks of a typical lead-zinc sulfide tailings impoundment based on its geochemical characteristics

AbstractThe petrographical and geochemical characteristics of some basic sills and dykes from Southern Rhenish Schiefergebirge are described. The dykes are generally more altered than the sills and are classified into two types according to their relation to the lead-zinc veins found in the area. The distribution of some trace elements in the sills and dykes is given and the nature and mechanism of alteration are discussed.

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Geochemical Characteristics of Ore-Bearing Strata of Pb-Zn Deposits in the Sichuan-Yunnan-Guizhou Border Area in Southwest China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.868.113 ◽

2013 ◽

Vol 868 ◽

pp. 113-116

Author(s):

Long Jian ◽

Fu Ju Jia ◽

Yan Dao

Keyword(s):

Comparative Study ◽

Southwest China ◽

Geochemical Characteristics ◽

Border Area ◽

Zinc Deposit ◽

Element Abundances ◽

Elemental Geochemistry ◽

Different Ages ◽

Lead Zinc ◽

The Comparative Study

The Pb-Zn deposits (or points) with different ages of ore-bearing strata are counted in in the paper. Through discussing the lithology and elemental geochemistry in ore-bearing strata to explain the lead element and zinc element relate to strata and lithology, the author suggested the lead-zinc deposit mainly were exposed in specific stratum, considering the deposits was obviously was controlled by stratum and was greatly influenced by lithology. For this reason, combining with the comparative study of element abundances in rock, it has maily demonstrated the relevance of ore-forming elements.

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Using a New Bulk Flotation Process to Enhance the Recovery of Mineral Beneficiation in a Lead-Zinc Sulfide-Oxide Mixed Ore

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.634-638.3545 ◽

2013 ◽

Vol 634-638 ◽

pp. 3545-3550

Author(s):

Yi Qiang Liang ◽

Xu Dong Zhang ◽

Han Ping Zhang ◽

Mei Hua Liu

Keyword(s):

Zinc Sulfide ◽

Phase Analysis ◽

Sem Analysis ◽

Flotation Process ◽

Oxidation Rates ◽

Lead And Zinc ◽

Mineral Beneficiation ◽

Lead Zinc ◽

Important Means ◽

Considerable Benefit

The properties of a lead-zinc ore are investigated by XRD and SEM analysis methods. Results show that the ore assays 1.27 per cent Pb and 1.62 per cent Zn, mainly occurring in the form of sulfide minerals. Through lead and zinc phase analysis, it is known that the distribution of galena reaches 63.78 per cent, and that of sphalerite is up to 77.16 per cent. And the oxidation rates of lead and zinc will become much more serious as the depth of exploitation increases, which is a great trouble that the mine faces with. So how to improve the recovery of mineral beneficiation is an important means to enhance the economical benefits in the mine. Many tests work have been done to develop a new bulk flotation process to enhance the Pb and Zn recovery. Flotation results of the closed circuit test indicate that the Pb and Zn recovery from the new bulk flotation process can be increase by 10 per cent and 2 per cent, respectively, which makes very considerable benefit for the mine.

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Contamination of bottom sediments by lead, zinc and cadmium in Rzeszow reservoir

Ochrona Srodowiska i Zasobów Naturalnych ◽

10.2478/oszn-2018-0016 ◽

2018 ◽

Vol 29 (4) ◽

pp. 10-15

Author(s):

Katarzyna Maj-Zajezierska ◽

Piotr Koszelnik

Keyword(s):

Heavy Metals ◽

Bottom Sediments ◽

Sediment Quality ◽

Environmental Risks ◽

Sediment Classification ◽

Quality Classification ◽

Lead Zinc ◽

Aquatic Sediment ◽

Positive Effect

Abstract The aim of the present study was to determine the level of contamination of the bottom sediments in the Rzeszow reservoir by the selected heavy metals Pb, Cd and Zn, and to identify the potential environmental risks of heavy metals content basing on available assessments and classification of bottom sediments. The Rzeszow reservoir is situated on the Wisłok River in the Podkarpackie Voivodeship, southeaster Poland, was constructed on 1974. Nowadays, as a result of silting, the reservoir reduced its surface and depth, which does not have a positive effect on the assumed functions it is to perform. The study was conducted in 2016. The samples of sediment were collected in five locations. Samples were taken twice: in June and in October. The following concentrations have been determined: cadmium - 0.01 ÷ 0.92 mg•kg–1, zinc - 54.39 ÷ 128 mg•kg–1, lead - 2.98 ÷ 25.42 mg•kg–1. The decline trend in the sediment is following: Zn > Pb > Cd. For the assessment of sediment contamination, following methods: aquatic sediment quality classification used by the Polish Geological Institute - I class, Regulation of the Minister of Environment of April 16 2002 on the types and concentrations of substances contaminating the excavated material – unpolluted and LAW sediment classification – Pb - I/I-II, Cd - I/I-II/II and Zn - I/I-II. The obtained results were compared with the results obtained by the other authors in earlier years, which led to the estimated changes in the concentration of the tested metals.

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Desulfurization kinetics of high lead and zinc sulfide containing slag with oxygen blowing

Journal of Mining and Metallurgy Section B Metallurgy ◽

10.2298/jmmb190121026y ◽

2019 ◽

Vol 55 (2) ◽

pp. 187-196

Author(s):

K. Ouyang ◽

Z.-H. Dou ◽

T.-A. Zhang ◽

Y. Liu ◽

L.-P. Niu

Keyword(s):

Zinc Sulfide ◽

Spinel Phase ◽

Xrd Analysis ◽

Smelting Process ◽

Experimental Conditions ◽

Lead And Zinc ◽

Desulfurization Process ◽

Lead Zinc ◽

Kinetics Of ◽

High Lead

The desulfurization process of lead and zinc slag is an important smelting process to obtain lead and zinc. The aim of this paper is to study the desulfurization process of high lead and zinc sulfide containing slag with oxygen blowing. The predominance area diagrams of the Pb-Zn-Fe-S-O system (Pb/(Fe+Pb+Zn)=0.176, Zn/(Fe+Pb+Zn)=0.56) at various temperature were thermodynamically constructed. The physical properties, the chemical composition and the phase transformation of the desulfurization slag were investigated. The thermodynamic results indicated that lead, zinc, and iron can be oxidized to form high lead and zinc slag. The experimental results illustrated that the sulfur content in the oxidation slag can be reduced to less than 1% as temperature increased up to 1573 K. The XRD analysis of as-quenched slag shows the PbS and ZnS phase decreased, while zincite and spinel phase (ZnxFe3-xO4+y) emerged and increased as the reaction time increased. The desulfurization process of molten slag were considered to be the first-order reaction and the apparent activation energy was estimated to be 44.46 kJ/mol. Under the experimental conditions, the mass transfer in the gas and liquid phase was likely to be the restrictive step.

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