Process for the hydrometallurgic purification treatment of Waelz oxides by leaching with sodium carbonate

This process allows the elimination of contaminants from waelz oxide, (chlorine, sodium, potassium, sulfur and fluorine, fundamentally), by means of its hydrometallurgic treatment in the following stages: - Leaching with sodium carbonate in warm aqueous alkaline medium. - Solid - liquid separation o...

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Bibliographische Detailangaben
Hauptverfasser:	VALLEJO, OCHOA DE ALDA JAVIER, DANOBEITIA, SIERRA IKER, GOICOECHEA, GANDIAGA NESTOR
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	This process allows the elimination of contaminants from waelz oxide, (chlorine, sodium, potassium, sulfur and fluorine, fundamentally), by means of its hydrometallurgic treatment in the following stages: - Leaching with sodium carbonate in warm aqueous alkaline medium. - Solid - liquid separation of the effluent and the solid material. - Purification of the effluent by the elimination of the heavy metals, and optionally, the undesired anions. - Washing with water of the solid material obtained after the sodium leaching. - Solid - liquid separation of the water and the purified waelz oxide. - Recirculation and warming of the effluent obtained from the washing stage, for its reutilization in the sodium leaching stage.