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Showing 1 to 7 of 7 for “"PRESSURE LEACHING"”.
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Pressure leaching of cassiterite and hydrogen reduction of tin from stannous-ammonium sulfate solutions
Includes bibliographical references.
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ΒΕΛΤΙΣΤΟΠΟΙΗΣΗ ΤΗΣ ΕΚΧΥΛΙΣΗΣ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ
THE ATMOSPHERIC PRESSURE LEACHING OF NICKELIFEROUS LATERITES BY SULFURIC ACID IS AN ALTERNATIVE METHOD TO THE HIGH PRESSURE LEACHING. TWO TYPES OF ORES WERE STUDIED (SERPENTINIC, HEMATITIC) AND THE INFLUENCE OF VARIOUS PARAMETERS LIKE LEACHING TEMPERATURE, ACID CONSUMPTION, PULP DENSITY, PREHEATING …
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Hydrometallurgical extraction of platinum group metals from a low-grade ore concentrate
… would exclude treatment via the smelter and pressure leaching: which are costly. energy intensive and result in leaching of large quantities of non-valuable elements. Previous studies revealed that organic acids had the potential to economically extract the PGMs under alkaline conditions, and …
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Structural and electrical characterisation of silicon and other semiconducting nanoparticle networks for use in sensor and photovoltaic applications
… such as concentration by flotation, smelting and pressure leaching by directly leaching low grade Platreef ore. The findings showed successful base metal recoveries; however, the production of thiocyanate during the cyanide leach raised concerns in terms of significant cyanide loss but also …
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Formation of thiocyanate in bioleaching residues and its effect in PGM recovery
… such as concentration by flotation, smelting and pressure leaching by directly leaching low grade Platreef ore. The findings showed successful base metal recoveries; however, the production of thiocyanate during the cyanide leach raised concerns in terms of significant cyanide loss but also …
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The role of surfactants in the leaching of zinc sulphide minerals at temperatures above the melting point of sulphur
… aqueous-solid interface. When introduced into leaching systems, the surfactants influenced the metal extraction to different extents. OPD and lignin sulfonic acid were the most efficient surfactants (or dispersants for liquid sulfur). The extent of zinc extraction was enhanced to about94 % for …
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ΕΚΧΥΛΙΣΗ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ ΥΠΟ ΠΙΕΣΗ
… ACCELARATED AT CONDITIONS OF HIGH TEMPERATURE- PRESSURE. THE EXTRACTION VALUES REACH100% UNDER CONDITIONS OF 220-260 C TEMPERATURE, 40-60 BAR PRESSURE 2 H DURATION. NUTRALIZATION OF THE EFFLVENTS IS VERY SATISFACTORY. THE DESIGN OF A METALLURGICAL FACTORY FOR NICKEL PRODUCTION WAS STUDIED WITH …