METHOD FOR SEPARATING AND RECOVERING DEPHOSPHORIZATION SLAG

PURPOSE:To improve the quality of recovered metal and to increase the rate of recovery by pulverizing dephosphorization slag by swelling and crumbling caused by the slaking of CaO and by recovering metal by magnetic force and compounds contg. F by treatment. CONSTITUTION:Crushed dephosphorization sl...

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Bibliographische Detailangaben
Hauptverfasser:	FUKAYA KAZUO, KITANI FUKUICHI, ARAKI SHIGERU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COMPOUNDS THEREOF DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE FERROUS OR NON-FERROUS ALLOYS FURNACES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING INORGANIC CHEMISTRY KILNS LIGHTING MECHANICAL ENGINEERING METALLURGY NON-METALLIC ELEMENTS OVENS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS RETORTS 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 WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the quality of recovered metal and to increase the rate of recovery by pulverizing dephosphorization slag by swelling and crumbling caused by the slaking of CaO and by recovering metal by magnetic force and compounds contg. F by treatment. CONSTITUTION:Crushed dephosphorization slag is put in a slaking tank and pulverized by swelling and crumbling caused by the slaking of CaO. Metal in the pulverized dephosphorization slag is attracted by a magnet and recovered. Ca(OH)2 in the remaining slag is removed by gravity separation and recovered. The remaining slag is then treated with an acid and filtered. CaF2 is recovered from the residue, and Ca5F(PO4)3 from the filtrate.