Andrea Miskufova

Technical University of Kosice - Technicka univerzita v Kosiciach · Department of Non-Ferrous Metals and Wastes Treatment

Copper anode furnace dust is waste by-product of secondary copper production containing zinc, lead, copper, tin, iron and many other elements. Hydrometallurgical Copper Anode Furnace dust recycling method was studied theoretically by thermodynamic calculations and the proposed method was verified experimentally on a laboratory scale. The optimum co...

Due to the increasing demand for battery raw materials, such as cobalt, nickel, manganese, and lithium, the extraction of these metals, not only from primary, but also from secondary sources, is becoming increasingly important. Spent lithium-ion batteries (LIBs) represent a potential source of raw materials. One possible approach for an optimized r...

Keywords: pyrometallurgical battery recycling; pyrometallurgy; lithium-ion battery; recycling; cobalt; nickel; circular economy; lithium minerals; lithium slag characterization; thermochemical modeling; critical raw materials; smelting. Due to the increasing demand for battery raw materials such as cobalt, nickel, manganese, and lithium, the extrac...

This work focuses on the hydrometallurgical processing of EAF steelmaking dust in laboratory conditions. The behavior of calcium under the influence of sulphuric acid as the leaching agent is discussed. Due to calcium presence the acid is continuously consumed, gradually leaching the calcium phase from EAF dust as well as other zinc- and iron-conta...

Zinc is present in electric arc furnace dust (EAFD) mainly in two basic minerals, namely as franklinite ZnFe 2 O 4 and/or zincite ZnO. While zincite is relatively reactive and easily treatable, franklinite is considerably refractory, which causes problems during EAFD processing. In this work EAFD containing 18.53% Zn was leached in water solution o...

LCD displays are the most widespread imaging technology at present. Their recycling becomes important due to containing rare indium. For experimental study displays after the manual dismantling of ten monitors (two monitors with LED backlighting) were used. After removal of polarizing foils, the granularity of the sample (<0.71 mm) was adjusted by...

The aim of this work was to study and describe leaching behaviour of Y, Eu and accompanying elements (Zn, Cd) from the phosphors of waste cathode ray tube (CRT) screens in low concentrated sulphuric acid solutions under both non-oxidizing and oxidizing conditions (H2O2). Thermodynamic study showed that non-oxidizing acid leaching leads to elemental...

LCD displays are the most widespread imaging technology at present. Their recycling becomes important for containing of rare In. For experimental study were used displays after the manual dismantling of 10 monitors (2 monitors with LED backlighting). After removal the polarizing foils, the granularity (< 0.710 mm) was adjusted by milling in the vib...

Fine-grained fraction (<53 μm) of industrial copper shaft furnace (CSF) dust was characterized in terms of chemical and phase compositions as well as leaching behaviour of lead (zinc) in sodium hydroxide solutions. The leaching was carried out in solutions of 1, 2, 3 and 4 M NaOH at temperatures of 20 and 80 °C and a solid to liquid ratio of 20. Th...

Tin belongs to critical metals for EU mainly for energy technologies (SET-plan) and it occurs practically in all electronic devices. In an effort to save and recover this element from electric and electronic waste (WEEE) the possibility for intensification of tin leaching by use of oxidative agent - ozone was studied in this work. As the WEEE repre...

Recycling of end-of-life vehicles at shredder plants, among well-managed metal recycling, ends up with huge amounts of waste residue, for which the complex recycling route is still missing. Automotive shredder residue (ASR) is often called light fraction, because after the separation of all the metal particles (by magnetic drum, eddy-current, pneum...

The paper presents preliminary results of experimental use of ozone in degradation of polymers in the field of recycling of metal-polyurethane (PUR) composites. By treating of aluminium-PUR segments waste by use of ozone at low flow rates (∼300 mg · h⁻¹ O3) foliowed by dry techniques (hammer mill crushing foliowed by air separation) it is possible...

Spent car catalytic converters contain an interesting amount of platinum, palladium and rhodium which makes them a possible secondary source of these metals. The amount of metals in the catalysts varies depending on its type. In the present study, the possibility of hydrometallurgical treatment of catalysts in hydrochloric acid with hydrogen peroxi...

The paper is focused on the characteristics of rare earth elements, their occurrence, use and application. A special type of electric and electronic waste - fluorescent lamps (FL) is known as a potential source of yttrium and other rare earth elements. This work includes an overview of spent fluorescent lamps treatment processes according to severa...

Neodymium was identified by the European commission as one of the deficient Rare earth elements (REE). This element is an irreplaceable element for permanent sintered Nd-Fe-B production. This work deals with kinetic and thermodynamic study of leaching the spent sintered Nd-Fe-B magnets obtained from hard disc drives of personal computers. The main...

One of the negative aspects of MSW (municipal solid waste) incineration is production of hazardous fly ashes. MSW fly ash usually contains heavy metals like for example chromium, lead, cadmium and organic substances (dioxins, furans), soluble compounds (salts) and other harmful substances. According to environmental legislative and with respect to...

This work focuses on possibilities to recover tin and copper by hydrometallurgical processes from printed circuit boards (PCBs) of discarded personal computers after thermal treatment. For experimental work crushed and sorted printed circuit boards with various granularity /-8 +0 mm, -8 +3 mm, -3 +0 mm/ were used. They were exposed to thermal treat...

This paper shows a review of literature data on the possibilities of indium recovery from ITO layers of waste LCD and LED displays. A short characterization of indium, its compounds, resources, production, and applications is presented. The structure and operation of LCD displays are shown. A detailed overview of the ITO leaching process is present...

The work includes a description of a hydrometallurgical processing of steelmaking dust a waste product of steel production from electric arc furnace (EAF). Most attention is paid to cementation. The aim is to study purification of solution by cementation of impurities that could cause problems in zinc electrowinning process. Most attention is focus...

This work provides research and evaluation of the influence of active gama alumina addition on green and sintered CaO material properties, microstructures and mineralogical phase formation. Experimental results have shown the possibility to prepare more stable CaO with excellent properties by energy saving one-stage burning process of natural groun...

In the present study, submerged-arc welding slags were characterized by applying a variety of methods, including X-ray fluorescence, X-ray diffraction, particle size, Raman spectroscopy, and scanning electron microscope with energy dispersive X-ray analysis. The content of Al proved to be quite similar within neutral and acid slags (10-14%), while...

During the production of pig iron in a blast furnace a large quantity of dust is generated. The main compounds of dust are iron oxides with a share of heavy non-ferrous metal oxides, mainly zinc. This work focuses on the leaching of blast furnace (BF) dust under normal conditions of temperature and pressure in dilute sulphuric acid. Leaching experi...

This paper deals with the leaching of printed circuit boards (PCBs) from used personal computers for the purpose of investigating tin and copper extraction into solution under different conditions. During the leaching process the influence of the temperature, leaching agent concentration and leaching time on tin and copper extraction was observed....

The hydrometallurgical route of copper and tin extraction from printed circuit boards (PCB) of used personal computers after thermal pretreatment is discussed. The PCB fractions crushed and sorted into -8+0, -8+3 and -3+0 mm were used for the experiments. The samples were thermally pretreated at temperatures of 300, 500, 700 and 900 °C during 15, 3...

Steelmaking dust is considered to be a hazardous by-product from steel production. Because of large heterogeneity and anisotropy of this kind of waste it is difficult to design suitable process for its recycling. The first and the most important step for recycling process design is to characterize the material from different points of view (chemica...

The possibilities of cobalt recovery from spent portable lithium accumulators were studied in this work. Incineration at 300, 500 and 700°C was realized in order to remove organic compounds. The highest loss on weight (around 25%) after incineration at 700°C was observed. Material after incineration was leached in 2M H2SO4 at 80°C without and with...

The hydrometallurgical route of copper and tin extraction from printed circuit boards (PCBs) of used personal computers after thermal pretreatment is discussed. The samples were thermally pretreated within temperature range of 300-900°C during 15, 30 and 60 min. Two methods of the thermal pretreatment were studied: burning and pyrolysis. The leachi...

In this study the hydrometallurgical processing of BOF sludge in the sulphuric acid solutions under atmospheric pressure and temperatures up to 100 °C is investigated on a laboratory scale. The influence of sulphuric acid concentration, temperature, time and liquid to solid ratio (L:S) on the leaching process was studied. The main aim of this study...

The aim of the experimental work was to study the leachability of Al from aluminium dross fines (achieved after mechanical pre-treatment) in alkaline solution at atmospheric conditions. The next step was oriented to study the recovery of leachable Al in the form of aluminium hydroxide and alumina suitable for utilisation as a catalysts carrier or a...

The leaching of zinc and copper from blast furnace dust generated in pyrometallurgical treatment of secondary raw material originated in copper smelter KOVOHUTY, a.s., Krompachy, Slovakia is studied in this work. The influence of temperature, sulphuric acid concentration and weight of sample were investigated. For the experiments were used differen...

In this study, the hydrometallurgical processing of a nickel-bearing concentrate was investigated on a laboratory scale. In the concentrate, nickel was present as both nepouite and millerite, and the leaching mechanisms of these minerals were studied. The solution used was sodium chloride solution, using cupric ion as an oxidant. The most important...

The recovery of aluminum from scrap has now become highly attractive, because of the significant energy saving in comparison to primary Al production and the increasing amount of short life-cycle products from consumption returned to recycling. The problematic waste from Al production is the aluminum dross. The aluminum dross is a very heterogeneou...

In this study, the hydrometallurgical processing of electric arc furnace (EAF) steelmaking dust is investigated on a laboratory scale under normal temperature and pressure conditions. The behaviour of zinc and iron under the influence of sulphuric acid as the leaching agent is discussed. The dependence between the temperature and acid concentration...

Phytoremediation has been defined as the use of green plants and their associated rhizospheric microorganisms to remove, degrade, or contain contaminants located in soisl, sediments, groundwater, surface water, and even the atmosphere. Categories of phytoremediation include - phytoextraction or phytoaccumulation, phytotransformation, phytostimulati...

Abstrakt Galvanický kal patrí do kategórie nebezpečných odpadov, nakoľko obsahuje lúhovateľné nebezpečné zložky ako sú ťažké kovy (napr. Cu, Zn, Cr, Cd), kyanidy, fluoridy, oleje a pod. Ekonomické spracovanie týchto kalov je značne komplikované, najmä kvôli ich komplexnosti a chemickej heterogenite. Táto práca sa zamerala na hydrometalurgické sprac...

Utilization of plants for stabilization and cleaning up of metal contaminated soil and water Phytoremediation has been defined as the use of green plants and their associated rhizospheric microorganisms to remove, degrade, or contain contaminants located in soisl, sediments, groundwater, surface water, and even the atmosphere. Categories of phytore...

This paper presents results of investigation on leaching of chalcopyrite in hydrochloric acid medium in the presence of deep-sea manganese nodules. The effects of temperature, acid concentration and charge composition were investigated. Chalcopyrite did not dissolve independently, but underwent oxidative leaching in the presence of deep-sea nodules...

The development of new materials and technologies is essential for the intensification of the industrial production. This effort is apparent also in the field of the refractory materials, therefore also dead burned lime (CaO) as a refractory material for steel industry is considered. A low hydration and corrosion resistance are the reasons why the...

Waste recycling belongs to important industrial activities resulting from both of economic and environmentally point of view. According to statute, iron and steelmaking dust and sludge from gas cleaning are classified as a hazardous waste. In this study the hydrometallurgical processing of the basic oxygen furnace sludge is investigated on a labora...

Abstrakt Cieľom práce je zosumarizovať metódy výroby kompozitných materiálov spevnených časticami. Metódy prípravy kompozitných materiálov spevnených časticami sa rozdeľujú podľa spôsobu vzniku sekundárnej fázy v matrici a podľa použitej technológie na: práškovo-metalurgické metódy, metódy tlakovej infiltrácie preforiem, pretavovanie a vysokoteplot...