Process for recycling spent pot linings (SPL) from primary aluminium production

The present invention relates to a process for recycling SPL (spent pot linings), from primary aluminium production, comprising the steps of grinding the separated fractions or cuts, separating materials by means of mechanical treatment, mixing salt slags with SPL, dissolving in water the product ob...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ALFARO ABREU, IGNACIO, RUIZ DE VEYE, CARLOS
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS DISPOSAL OF SOLID WASTE ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FERROUS OR NON-FERROUS ALLOYS FIRE-FIGHTING HUMAN NECESSITIES INORGANIC CHEMISTRY LIFE-SAVING METALLURGY PERFORMING OPERATIONS PRETREATMENT OF RAW MATERIALS PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS PRODUCTION AND REFINING OF METALS RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to a process for recycling SPL (spent pot linings), from primary aluminium production, comprising the steps of grinding the separated fractions or cuts, separating materials by means of mechanical treatment, mixing salt slags with SPL, dissolving in water the product obtained in the previous step, carrying out a chemical reaction between water and the materials to be made inert, sedimenting, removing cyanides, filtering to obtain a soluble fraction and another insoluble fraction, washing the insoluble fraction, crystallizing salts of the soluble fraction and aging or conditioning the insoluble fraction. The present invention further relates to the product obtained by means of said process and the use thereof as new material in different fields of industry.