• Title/Summary/Keyword: geoscience

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Effects of process variables on morphology of palladium metal deposit in hydrochloric acid medium

  • kim Min-Seuk;Lee Jae-Chun;Kim Won-Back;Jeong Jin-Ki;Nam Chul-Woo
    • 한국지구물리탐사학회:학술대회논문집
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    • 2003.11a
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    • pp.642-647
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    • 2003

  • Palladium is widely used for several applications and recovery of palladium from secondary sources becomes increasingly important since palladium is one of maldistributed platinum group metals. Electrochemical recovery of dense palladium metal sheet from Pd leaching solution is a simple and easily controlled method. The surface morphology of the recovered Pd metal was significantly affected by current density and temperature. Dense deposit morphology was in higher stress state regardless of preparation condition under $55^{\circ}C$. Rising temperature up to $70^{\circ}C$ had a stress releasing effect besides densification of Pd deposit.

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The optimized recover process of heavy minerals from Korean beach-sand

  • Shin, Hee-Young;Jeon, Ho-Soek;Baik, Seung-Woo;Kim, Wan-Tae;Lee, Jae-Chun
    • 한국지구물리탐사학회:학술대회논문집
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    • 2003.11a
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    • pp.648-653
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    • 2003

  • Optimized recovery of heavy minerals from the near shore sands of Korean Yellow Sea was investigated using physical processing technologies such as gravity concentration and magnetic separation. The head samples were subjected to the three stages effective separation; Head sample was first treated by a spiral separator to recover rough heavy mineral concentrates, which are contained minerals like ilmenite, zircon and rare earth minerals. Much higher beneficiation processes were subsequently taken by wilfley table and magnetic separation according to their magnetic field responses. Heavy minerals were effectively recovered by wilfley table and subsequent recleaning of heavy minerals by magnetic separations was conducted. Qualitative and relative-quantitative analyses of their constituent elements were doing using XRD and XRF.

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