Composition Optimization of Silicate Slag for Rare-earth Recycling
Project/Area Number |
24560911
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Metal making engineering
|
Research Institution | Ehime University |
Principal Investigator |
|
Project Period (FY) |
2012-04-01 – 2015-03-31
|
Project Status |
Completed (Fiscal Year 2014)
|
Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
Keywords | ケイ酸塩スラグ / リン酸 / レアアース回収 / 光学特性 / 組成 / 溶出試験 / 赤外分光 / リン酸塩 / 熱処理 / ガラス構造 / 吸収特性 |
Outline of Final Research Achievements |
In phospho-silicate slags, the composition condition, at which rare-earth elements are bonded selectively with PO4 tetrahedra, is [R2O+R'O]/[P2O5]≦1 in molar ratio, where R is the alkali metal and R' is the alkaline-earth metal. The structure of PO4 networks was characterized by infrared spectroscopy for optimized slag compositions. ICP-MS analysis revealed that rare-earth element and phosphate species were selectively dissolved into ultra-pure water by elution tests.
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Report
(4 results)
Research Products
(27 results)