{"id":{"repo_id":"greece","oai_identifier":"oai:10442/1399"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/1399","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΒΕΛΤΙΣΤΟΠΟΙΗΣΗ ΤΗΣ ΕΚΧΥΛΙΣΗΣ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ","abstract":"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 OF ORE ETC ON METALS RECOVERY AND ACID CONSUMPTION WAS INVESTIGATED. THESE EXPERIMENTAL RESULTSWERE CONFIRMED BY THE CONSTRUCTION AND OPERATION OF A SMALL PILOT LEACHING PLANT FOR CONTINUOUS COCURRENT LEACHING. THE DATA GATHERED BY EXPERIMENTAL WORK WERE USED FOR COMPUTER SIMULATION OF THE LEACHING PROCESS FLOW SHEET. FINALLY, THE INVESTMENT AND OPERATING LOST OF AN ATMOSPHERIC PRESSURE ACID LEACHING PLANT WERE ESTIMATED IN COMPARISON WITH THE COST OF THE HIGH PRESSURE LEACHING.","abstract_html":"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 OF ORE ETC ON METALS RECOVERY AND ACID CONSUMPTION WAS INVESTIGATED. THESE EXPERIMENTAL RESULTSWERE CONFIRMED BY THE CONSTRUCTION AND OPERATION OF A SMALL PILOT LEACHING PLANT FOR CONTINUOUS COCURRENT LEACHING. THE DATA GATHERED BY EXPERIMENTAL WORK WERE USED FOR COMPUTER SIMULATION OF THE LEACHING PROCESS FLOW SHEET. FINALLY, THE INVESTMENT AND OPERATING LOST OF AN ATMOSPHERIC PRESSURE ACID LEACHING PLANT WERE ESTIMATED IN COMPARISON WITH THE COST OF THE HIGH PRESSURE LEACHING.","abstract_has_math":false,"creators":["Παναγιωτόπουλος, Νικόλαος"],"institution":"National Technical University of Athens (NTUA)","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1990,"date_issued":"1990","date_published":"1990","updated_at":"2026-07-24T02:24:52Z","subjects":["ΑΝΑΚΤΗΣΗ ΝΙΚΕΛΙΟΥ","Εκχύλιση","ΘΕΙΙΚΟ ΟΞΥ","ΛΑΤΕΡΙΤΗΣ","ΠΑΡΑΓΩΓΗ ΝΙΚΕΛΙΟΥ","Υδρομεταλλουργία","Hydrometallurgy","Laterites","NICKEL PRODUCTION","NICKEL RECOVERY","SULFURIC ACID","Επιστήμες Μηχανικού και Τεχνολογία","Περιβαλλοντική Μηχανική","Engineering and Technology","Environmental Engineering"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1399"],"render_values":[{"text":"10.12681/eadd/1399","href":"https://doi.org/10.12681/eadd/1399","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/1399","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Παναγιωτόπουλος, Νικόλαος"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1990"]},{"key":"dc:publisher","label":"Institution","values":["National Technical University of Athens (NTUA)","Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ΑΝΑΚΤΗΣΗ ΝΙΚΕΛΙΟΥ","Εκχύλιση","ΘΕΙΙΚΟ ΟΞΥ","ΛΑΤΕΡΙΤΗΣ","ΠΑΡΑΓΩΓΗ ΝΙΚΕΛΙΟΥ","Υδρομεταλλουργία","Hydrometallurgy","Laterites","NICKEL PRODUCTION","NICKEL RECOVERY","SULFURIC ACID","Επιστήμες Μηχανικού και Τεχνολογία","Περιβαλλοντική Μηχανική","Engineering and Technology","Environmental Engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1399","http://hdl.handle.net/10442/hedi/1399"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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 OF ORE ETC ON METALS RECOVERY AND ACID CONSUMPTION WAS INVESTIGATED. THESE EXPERIMENTAL RESULTSWERE CONFIRMED BY THE CONSTRUCTION AND OPERATION OF A SMALL PILOT LEACHING PLANT FOR CONTINUOUS COCURRENT LEACHING. THE DATA GATHERED BY EXPERIMENTAL WORK WERE USED FOR COMPUTER SIMULATION OF THE LEACHING PROCESS FLOW SHEET. FINALLY, THE INVESTMENT AND OPERATING LOST OF AN ATMOSPHERIC PRESSURE ACID LEACHING PLANT WERE ESTIMATED IN COMPARISON WITH THE COST OF THE HIGH PRESSURE LEACHING.","Η ΕΚΧΥΛΙΣΗ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ ΣΕ ΑΤΜΟΣΦΑΙΡΙΚΗ ΠΙΕΣΗ ΑΠΟΤΕΛΕΙ ΜΙΑ ΕΝΑΛΛΑΚΤΙΚΗ ΜΕΘΟΔΟ ΑΠΟ ΤΗΝ ΕΚΧΥΛΙΣΗ ΣΕ ΥΨΗΛΗ ΠΙΕΣΗ. ΜΕΛΕΤΗΘΗΚΕ Η ΕΚΧΥΛΙΣΗ ΔΥΟ ΕΙΔΩΝ ΛΑΤΕΡΙΤΗ (ΣΕΡΠΕΝΤΙΝΙΚΟΥ, ΑΙΜΑΤΙΤΙΤΚΟΥ) ΣΕ ΔΙΑΦΟΡΕΣ ΣΥΝΘΗΚΕΣ ΘΕΡΜΟΚΡΑΣΙΑΣ, ΣΥΓΚΕΝΤΡΩΣΗΣ ΟΞΕΟΣ, ΠΥΚΝΟΤΗΤΑΣ ΠΟΛΦΟΥ ΚΑΙ ΠΡΟΘΕΡΜΑΝΣΗΣ ΚΑΙ ΜΕΤΡΗΘΗΚΑΝ ΟΙ ΑΝΤΙΣΤΟΙΧΕΣ ΑΝΑΚΤΗΣΕΙΣ ΤΩΝ ΜΕΤΑΛΛΩΝ ΚΑΙ Η ΚΑΤΑΝΑΛΩΣΗ ΤΟΥ ΟΞΕΟΣ. ΤΑ ΠΡΟΗΓΟΥΜΕΝΑ ΠΕΙΡΑΜΑΤΙΚΑ ΑΠΟΤΕΛΕΣΜΑΤΑ ΕΠΙΒΕΒΑΙΩΘΗΚΑΝ ΜΕ ΤΗΝ ΚΑΤΑΣΚΕΥΗ ΚΑΙ ΛΕΙΤΟΥΡΓΙΑ ΜΕΓΑΛΥΤΕΡΟΥ ΑΝΤΙΔΡΑΣΤΗΡΑ ΕΚΧΥΛΙΣΗΣ ΣΕ ΣΥΝΕΧΗ ΡΟΗ ΤΡΟΦΟΔΟΣΙΑΣ. ΜΕ ΒΑΣΗ ΑΥΤΕΣ ΤΙΣ ΜΕΤΡΗΣΕΙΣ ΣΧΕΔΙΑΣΤΗΚΕΚΑΙ ΕΠΙΛΥΘΗΚΕ ΤΟ ΙΣΟΖΥΓΙΟ ΜΑΖΑΣ ΚΑΙ ΕΝΕΡΓΕΙΑΣ ΕΝΟΣ ΚΥΚΛΩΜΑΤΟΣ ΕΚΧΥΛΙΣΗΣ ΜΕ ΗΛΕΚΤΡΟΝΙΚΟ ΥΠΟΛΟΓΙΣΤΗ ΚΑΙ ΕΠΙΠΛΕΟΝ ΕΚΤΙΜΗΘΗΚΕ ΤΟ ΚΟΣΤΟΣ ΕΠΕΝΔΥΣΗΣ ΚΑΙ ΛΕΙΤΟΥΡΓΙΑΣΤΗΣ ΕΚΧΥΛΙΣΗΣ ΣΕ ΑΤΜΟΣΦΑΙΡΙΚΗ ΠΙΕΣΗ ΣΕ ΣΥΓΚΡΙΣΗ ΜΕ ΑΝΤΙΣΤΟΙΧΟ ΚΥΚΛΩΜΑ ΕΚΧΥΛΙΣΗΣ ΣΕ ΥΨΗΛΗ ΠΙΕΣΗ."]},{"key":"dc:title","label":"Title","values":["ΒΕΛΤΙΣΤΟΠΟΙΗΣΗ ΤΗΣ ΕΚΧΥΛΙΣΗΣ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ","OPTIMIZATION OF SULFURIC ACID LEACHING OF LATERITES"]}]}],"canonical_facts":{"dc:creator":["Παναγιωτόπουλος, Νικόλαος"],"dc:date":["1990"],"dc:description":["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 OF ORE ETC ON METALS RECOVERY AND ACID CONSUMPTION WAS INVESTIGATED. THESE EXPERIMENTAL RESULTSWERE CONFIRMED BY THE CONSTRUCTION AND OPERATION OF A SMALL PILOT LEACHING PLANT FOR CONTINUOUS COCURRENT LEACHING. THE DATA GATHERED BY EXPERIMENTAL WORK WERE USED FOR COMPUTER SIMULATION OF THE LEACHING PROCESS FLOW SHEET. FINALLY, THE INVESTMENT AND OPERATING LOST OF AN ATMOSPHERIC PRESSURE ACID LEACHING PLANT WERE ESTIMATED IN COMPARISON WITH THE COST OF THE HIGH PRESSURE LEACHING.","Η ΕΚΧΥΛΙΣΗ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ ΣΕ ΑΤΜΟΣΦΑΙΡΙΚΗ ΠΙΕΣΗ ΑΠΟΤΕΛΕΙ ΜΙΑ ΕΝΑΛΛΑΚΤΙΚΗ ΜΕΘΟΔΟ ΑΠΟ ΤΗΝ ΕΚΧΥΛΙΣΗ ΣΕ ΥΨΗΛΗ ΠΙΕΣΗ. ΜΕΛΕΤΗΘΗΚΕ Η ΕΚΧΥΛΙΣΗ ΔΥΟ ΕΙΔΩΝ ΛΑΤΕΡΙΤΗ (ΣΕΡΠΕΝΤΙΝΙΚΟΥ, ΑΙΜΑΤΙΤΙΤΚΟΥ) ΣΕ ΔΙΑΦΟΡΕΣ ΣΥΝΘΗΚΕΣ ΘΕΡΜΟΚΡΑΣΙΑΣ, ΣΥΓΚΕΝΤΡΩΣΗΣ ΟΞΕΟΣ, ΠΥΚΝΟΤΗΤΑΣ ΠΟΛΦΟΥ ΚΑΙ ΠΡΟΘΕΡΜΑΝΣΗΣ ΚΑΙ ΜΕΤΡΗΘΗΚΑΝ ΟΙ ΑΝΤΙΣΤΟΙΧΕΣ ΑΝΑΚΤΗΣΕΙΣ ΤΩΝ ΜΕΤΑΛΛΩΝ ΚΑΙ Η ΚΑΤΑΝΑΛΩΣΗ ΤΟΥ ΟΞΕΟΣ. ΤΑ ΠΡΟΗΓΟΥΜΕΝΑ ΠΕΙΡΑΜΑΤΙΚΑ ΑΠΟΤΕΛΕΣΜΑΤΑ ΕΠΙΒΕΒΑΙΩΘΗΚΑΝ ΜΕ ΤΗΝ ΚΑΤΑΣΚΕΥΗ ΚΑΙ ΛΕΙΤΟΥΡΓΙΑ ΜΕΓΑΛΥΤΕΡΟΥ ΑΝΤΙΔΡΑΣΤΗΡΑ ΕΚΧΥΛΙΣΗΣ ΣΕ ΣΥΝΕΧΗ ΡΟΗ ΤΡΟΦΟΔΟΣΙΑΣ. ΜΕ ΒΑΣΗ ΑΥΤΕΣ ΤΙΣ ΜΕΤΡΗΣΕΙΣ ΣΧΕΔΙΑΣΤΗΚΕΚΑΙ ΕΠΙΛΥΘΗΚΕ ΤΟ ΙΣΟΖΥΓΙΟ ΜΑΖΑΣ ΚΑΙ ΕΝΕΡΓΕΙΑΣ ΕΝΟΣ ΚΥΚΛΩΜΑΤΟΣ ΕΚΧΥΛΙΣΗΣ ΜΕ ΗΛΕΚΤΡΟΝΙΚΟ ΥΠΟΛΟΓΙΣΤΗ ΚΑΙ ΕΠΙΠΛΕΟΝ ΕΚΤΙΜΗΘΗΚΕ ΤΟ ΚΟΣΤΟΣ ΕΠΕΝΔΥΣΗΣ ΚΑΙ ΛΕΙΤΟΥΡΓΙΑΣΤΗΣ ΕΚΧΥΛΙΣΗΣ ΣΕ ΑΤΜΟΣΦΑΙΡΙΚΗ ΠΙΕΣΗ ΣΕ ΣΥΓΚΡΙΣΗ ΜΕ ΑΝΤΙΣΤΟΙΧΟ ΚΥΚΛΩΜΑ ΕΚΧΥΛΙΣΗΣ ΣΕ ΥΨΗΛΗ ΠΙΕΣΗ."],"dc:identifier":["10.12681/eadd/1399","http://hdl.handle.net/10442/hedi/1399"],"dc:language":["gre"],"dc:publisher":["National Technical University of Athens (NTUA)","Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)"],"dc:subject":["ΑΝΑΚΤΗΣΗ ΝΙΚΕΛΙΟΥ","Εκχύλιση","ΘΕΙΙΚΟ ΟΞΥ","ΛΑΤΕΡΙΤΗΣ","ΠΑΡΑΓΩΓΗ ΝΙΚΕΛΙΟΥ","Υδρομεταλλουργία","Hydrometallurgy","Laterites","NICKEL PRODUCTION","NICKEL RECOVERY","SULFURIC ACID","Επιστήμες Μηχανικού και Τεχνολογία","Περιβαλλοντική Μηχανική","Engineering and Technology","Environmental Engineering"],"dc:title":["ΒΕΛΤΙΣΤΟΠΟΙΗΣΗ ΤΗΣ ΕΚΧΥΛΙΣΗΣ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ","OPTIMIZATION OF SULFURIC ACID LEACHING OF LATERITES"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:24:52Z"}