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PHASE RELATIONS IN CaO-SiO2-Nd2O3 SYSTEM AT 1600oC

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Presentation on theme: "PHASE RELATIONS IN CaO-SiO2-Nd2O3 SYSTEM AT 1600oC"— Presentation transcript:

1 PHASE RELATIONS IN CaO-SiO2-Nd2O3 SYSTEM AT 1600oC
Thu Hoai LE, Annelies MALFLIET, Bart BLANPAIN and Muxing GUO

2 Phase relations in rare earth oxides containing slag systems and rare earths (Res) recycling
Res containing slags’ main components: CaO, SiO2, Al2O3 Rare earths issues Recycling rare earths Solution to enhance potential of metals recovery and slag recycling? Slag properties? Slag treatment processes Unknown form previous studies: liquidus surface, phase regions

3 Isothermal equilibrium experiment
Ar S M MFC Oxygen sensor Water-cooled flange Methodology: High temperature equilibration Quenching technique Experimental conditions: Pt-20%Rh crucible Ar atmosphere Temperature: 1600oC Characterization: EPMA-WDS: quantitative analysis XRD: recognize phases in solid state equilibrium samples EBSD: determine liquid/solid phases M: Magnesium S: Silica gel MFC: Mass Flow Controller

4 Phase diagram construction

5 Application Thermodynamic database development for Res oxide systems
Recycling of Res: modify slag composition, further slag treatment to optimize recycling process

6 Thank you for your attention!

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