Control of pyrite surface chemistry in physical coal cleaning [electronic resource]
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| Online Access: |
Online Access |
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| Corporate Authors: | , |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Defense ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1992.
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| Subjects: |
| Abstract: | The removal of pyrite from coal by flotation or any other surface chemistry based separation process is often hampered by the apparent hydrophobicity of the mineral. Results obtained in this project suggest that corrosion processes are responsible for the apparent hydrophobicity of pyrite in aqueous environments. Characterization of the corrosion products of pyrite in acidic and alkaline solution has been performed using electrochemical (cyclic voltammetry and single-potential-step chronoamperometry) and spectroscopic techniques (X-ray photoelectron spectroscopy -- XPS). The nature of the surface products have been correlated with hydrophobicity determined from in-situ contact angle measurements. The results show that pyrite hydrophobicity is influenced by either the oxidation or reduction conditions of the system. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 06/24/1992. "doe/pc/89789-t9" "DE92015803" Yoon, R.H.; Luttrell, G.H.; Zachwieja, J.B. |
| Physical Description: | Pages: (19 p) : digital, PDF file. |