Metals recovery from galvanic sludge by sulfate roasting and thiosulfate leaching

Amaral, Fábio Augusto Dornelles; Santos, Viviane Silva; Bernardes, Andréa Moura

doi:10.1016/j.mineng.2014.01.017

Cited by 26 publications

(18 citation statements)

References 23 publications

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“…Roasting is a typical pyrometallurgical method, which is based on the difference of chemical reaction behavior between minerals and additives under high temperature [85]. Together with hydrometallurgical methods such as leaching, roasting has been widely used in the enrichment of low-grade mineral resources, such as goethite, copper oxide, manganese oxide ores, and galvanic sludge [85][86][87][88].…”

Section: Enrichment Of Rees Using Roastingmentioning

confidence: 99%

“…Together with hydrometallurgical methods such as leaching, roasting has been widely used in the enrichment of low-grade mineral resources, such as goethite, copper oxide, manganese oxide ores, and galvanic sludge [85][86][87][88]. Research related to REE recovery using roasting from secondary resources has been published in recent years.…”

Section: Enrichment Of Rees Using Roastingmentioning

confidence: 99%

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A Review of the Occurrence and Promising Recovery Methods of Rare Earth Elements from Coal and Coal By-Products

Zhang

Rezaee

Bhagavatula

et al. 2015

International Journal of Coal Preparation and Utilization

154

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Previous research indicates that coal and coal by-products are a potential source of critical elements including rare earth elements (REE) with estimated amounts in the range of 50 million metric tons. Despite the proven presence of elevated REE concentrations, commercial extraction and recovery have not been realized. This article provides a review of the abundance, mode of occurrence, and recovery methods of rare earth elements in coal and coal by-products. The feasibility of using established REE extraction and recovery technologies is discussed along with issues associated with their use with coal resources.

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Section: Enrichment Of Rees Using Roastingmentioning

confidence: 99%

Section: Enrichment Of Rees Using Roastingmentioning

confidence: 99%

A Review of the Occurrence and Promising Recovery Methods of Rare Earth Elements from Coal and Coal By-Products

Zhang

Rezaee

Bhagavatula

et al. 2015

International Journal of Coal Preparation and Utilization

154

View full text Add to dashboard Cite

show abstract

“…In this way, through the application of the tertiary treatment preceeded by quality pre-treatment, the efficiency of the technological process increases and the demands of pure technologies are met. If a classical wastewater treatment is used, secondary environment pollution occurs in the form of sludge, which can be destabilised through chemical transformations into ecofriendly products [8][9][10][11][12].…”

Section: Physical Treatment Involves Evaporation and Mechanical Procementioning

confidence: 99%

The Treatment of Waste Oil-in-Water Emulsions in the Metalworking Process

Lazarević¹,

Stanisavljević²

2018

Safety Engineering

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Used water emulsions obtained in the metalworking process contain oils and grease, organic compounds as well as secondary oils and anti-corrosion fluids, metal ions and other things. Since they can have a negative effect on the environment before released into the recipients, they need to be processed through the primary, secondary and tertiary phase of treatment. The primary treatment procedure of waste oil-in-water emulsions is used for the separation of free and non-emulsifying oils as well as for balancing the course of wastewater and oil concentration. In the secondary phase of treatment of waste oil-in-water emulsions, the emulsifying oil and a large fraction of dissolved oil are carried out. What follows is the tertiary biological treatment based on the basic biological processes present in nature. Key words: metalworking, waste oil-in-water emulsions, treatment

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“…Stabilization of heavy metals from galvanic sludge is carried out by various technological processes, such as the incorporation in bricks [4], borosilicate glass [5], glassceramics (along with aluminum slag) [6], clay ceramics [7], transparent glass-ceramics [8], red ceramics [9] or calcium sulphoaluminate cement [10], reuse in the metallurgical industry [11], vitrification [12], solidification by asphalt emulsion [13], etc. Besides, a lot of research has been conducted in order to develop various applications of waste galvanic sludge like obtaining malayaite ceramic pigments [14], Cu-concentrates [15] or binders (along with a petrochemical waste) [16], immobilizing heavy metals using of sodium silicate and tetraborate [17], recovering toxic metals by sulfate treatments [18], removing nickel, copper and chromium in an electrocoagulation system with Fe-and Al-electrodes [19], extracting chromium [20], performing chromium passivation [21] and others.…”

Section: Introductionmentioning

confidence: 99%

Use of sintering to immobilize toxic metals present in galvanic sludge into a stabile glass-ceramic structure

et al. 2018

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Galvanization process requires the use a large amount of water and produces wastewaters that are usually purified by conventional cost-effective procedure. This kind of treatment generates waste sludge which becomes a hazardous if is not properly stabilized. Hence, the aim of this paper is to investigate the characteristics of galvanic sludge through the inspection of its physicochemical parameters and consider stabilization of waste materials, including waste glass and aluminum slag by their conversion into an eco-designed material referred to as glass ceramics. The obtained products have been studied by X-ray diffraction (XRD). XRD analyses confirmed occurrence of chemical and phase transformations in treated galvanic sludge and binding of toxic metals (Al 3+ , Cr 3+ , Cu 2+ , Cd 2+ , Ni 2+ , Pb 2+ , Zn 2+ ) into crystalline phases and very sTab. structure.

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Metals recovery from galvanic sludge by sulfate roasting and thiosulfate leaching

Cited by 26 publications

References 23 publications

A Review of the Occurrence and Promising Recovery Methods of Rare Earth Elements from Coal and Coal By-Products

A Review of the Occurrence and Promising Recovery Methods of Rare Earth Elements from Coal and Coal By-Products

The Treatment of Waste Oil-in-Water Emulsions in the Metalworking Process

Use of sintering to immobilize toxic metals present in galvanic sludge into a stabile glass-ceramic structure

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