نتایج جستجو برای: hydrometallurgy

تعداد نتایج: 165  

Journal: :Waste management 2001
P Pisciella S Crisucci A Karamanov M Pelino

The vitrification of zinc-hydrometallurgy wastes, electric arc furnace dust (EAFD), drainage mud, and granite mud was shown to immobilize the hazardous components in these wastes. Batch compositions were prepared by mixing the wastes with glass-cullet and sand to force the final glass composition into the glass forming region of the SiO2-Fe2O3-(CaO, MgO) system. The vitrification was carried ou...

2001
Charles Madic

For more than 10 years, a revival of the interest for the partitioning of high active nuclear wastes (HAWs) exists worldwide in connection with possible improvements of the management of the HAWs actually produced and with futuristic nuclear fuel cycles. The main aim of the partitioning processes is to separate, from the complex mixtures of HAWs, the long-lived radionuclides (LLRNs), belonging ...

Journal: :Minerals Engineering 2021

The presence of small particles at operating conditions the hydrometallurgy process forming crud is a complicated issue. These particles, most often silica and clays, remain in suspension or float to top. A potential solution for their elimination could be promote sedimentation solids by addition surfactant. However, such procedure these complex systems, with different kinds sizes requires eval...

Journal: :ACS Sustainable Chemistry & Engineering 2021

The recovery of metals from the waste electrical and electronic equipment (WEEE) is a major challenge to preserve natural resources. Hydrometallurgy, where are leached, promising method but generates large amounts polluting effluents. In this study we design aqueous leaching foams, composed 90% v/v gas 10% HCl solution oxidize dissolve copper. We take advantage oxidizing power dioxygen (O2) pre...

Journal: :Processes 2023

The application of liquid–liquid chromatography principles to solvent extraction processes in hydrometallurgy can greatly simplify rare earth metal separation technologies by separating multicomponent mixtures one technological operation. In this study, the chromatographic elements (REEs) multistage columns was experimentally studied under conditions impulse sample injection—single and multiple...

Journal: :Journal of Sustainable Metallurgy 2022

With the vigorously growing demand of steel industry, corrosion resistance alloys, clean energy industries, and a variety engineered infrastructure or technology, high-grade nickel ores are being exhausted gradually in world. This review outlines metallurgical processes for production from various sulfide resources, particularly focusing on recent developments to identify potential trends techn...

Journal: :Minerals 2023

Pb and BHA in Pb-BHA-NaOL collector assembled by lead nitrate (Pb), benzohydroxamic acid (BHA), sodium oleate (NaOL) with a 240:120:1 molar ratio scheelite flotation have the common defects of reagents including high cost, environmental pollution reducing hydrometallurgy efficiency. Therefore, this study, efficient desorption reuse adsorbed on surfaces was first proposed. The test results showe...

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