Characterization of the lead smelter slag in Santo Amaro, Bahia, Brazil

Lima, L. R. P. de Andrade; Bernardez, L. A.

doi:10.1016/j.jhazmat.2011.02.091

Cited by 99 publications

(30 citation statements)

References 15 publications

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“…If slag is dumped openly, toxic heavy metals are released into soil and groundwater by various agents, including rain and wind, and are hardly decomposed. 5,6) As a consequence, organisms and environments become chronically and irreversibly polluted. Therefore, lead slag is harmful to living organisms, 7) and its harmful effects have been extensively investigated all over the world.…”

Section: Introductionmentioning

confidence: 99%

Probing Study on Separating Pb, Zn, and Fe from Lead Slag by Coal-based Direct Reduction

Wang

Yang

et al. 2017

ISIJ Int.

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Water-quenched lead slags are classified as hazardous materials because they contain a certain amount of heavy metals. In this study, coal-based direct reduction followed by magnetic separation was presented to separate Pb, Zn, and Fe from lead slag. Lead slag was mixed with coal and additive and treated in a laboratory tube furnace. In the process of direct reduction, Pb and Zn compounds were reduced to elementary substances and entered into flue gas as dust. Fe was reduced to metallic iron and separated from roasted slag by magnetic separation. The effects of roasting temperature, roasting time, and usage of coal and additive were experimentally determined. The following optimum process parameters were proposed: weight ratios of slag, coal ratio of 30%, additive ratio of 15%, and roasting at 1 200°C for 90 min. Under these conditions, a magnetic concentrate containing 93.73% total iron and recovery rate of 80.32% was obtained. In the process of direct reduction, the Pb and Zn volatilization rates were 97.48% and 97.19%, respectively. Lead slag and roasted slags were subjected to scanning electron microscopy and X-ray diffraction to identify the reduction mechanism of Pb, Zn, and Fe during direct reduction.

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Section: Introductionmentioning

confidence: 99%

Probing Study on Separating Pb, Zn, and Fe from Lead Slag by Coal-based Direct Reduction

Wang

Yang

et al. 2017

ISIJ Int.

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“…There are reports of soil contamination with Pb in many parts of the world that are known with mining and lead-acid battery recycling activities [3]- [5]. To circumvent bioavailability of Pb in contaminated soil, various methods of soil remediation have been employed.…”

Section: Introductionmentioning

confidence: 99%

Stabilisation of Pb in Pb Smelting Slag-Contaminated Soil by Compost-Modified Biochars and Their Effects on Maize Plant Growth

Ogundiran¹,

Lawal²,

Adejumo³

2015

JEP

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“…To determine the potential of lead slag as building materials for earthworks a complex set [6][7][8][9][10][11][12][13][14][15] of physical, chemical and detailed geotechnical analyzes have been performed.…”

Section: Introductionmentioning

confidence: 99%

Utilization of granulated lead slag as a structural material in roads constructions

Buzatu

Talpoş²,

Petrescu

et al. 2014

J Mater Cycles Waste Manag

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Pyrometallurgical processing of lead ores generates large amounts of slag which is stockpiled as chunk or granules. Romanian dump heaps of such slag produced in the period 1972-1998, occupy an area of 4522 m 2 and a volume of 6616 m 3 . To assess the possibility of using this material in road construction, a complex characterisation of this waste has been carried out. X-ray diffraction, microcompositional and microstructural analysis revealed the presence of Fe, Zn, Pb, Cu sulfides, Fe, Ca, Si oxides and complex Mg, Al silicates etc. Following investigations were drawn several conclusions. According to the analysis of leachate specific indicators for the three types of slags analyzed (cooled slowly lead slag; granulated lead slag; deposited lead slag), granulated lead slag has the lowest lead content; value that exceeds the maximum allowed (current legislation). Analysis of acid drainage revealed that cooled slowly lead slag is not acid generating, granulated lead slag is uncertain and deposited lead slag is acidgenerating. To determine the physico-mechanical and geotechnical properties Proctor compaction test, Californian index CBR test, permeability test and direct shear test were performed. Results from these investigations show an approximation of the values of granulated slag and sand.

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Characterization of the lead smelter slag in Santo Amaro, Bahia, Brazil

Cited by 99 publications

References 15 publications

Probing Study on Separating Pb, Zn, and Fe from Lead Slag by Coal-based Direct Reduction

Probing Study on Separating Pb, Zn, and Fe from Lead Slag by Coal-based Direct Reduction

Stabilisation of Pb in Pb Smelting Slag-Contaminated Soil by Compost-Modified Biochars and Their Effects on Maize Plant Growth

Utilization of granulated lead slag as a structural material in roads constructions

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