Control of pyrite surface chemistry in physical coal cleaning

Technical Report · Wed Jun 24 00:00:00 EDT 1992

DOI:https://doi.org/10.2172/5060937· OSTI ID:5060937

Luttrell, G H; Yoon, R H; Zachwieja, J B

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.

• Research Organization: Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Dept. of Mining and Minerals Engineering
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-89PC89789
• OSTI ID: 5060937
• Report Number(s): DOE/PC/89789-T9; ON: DE92015803
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
DESULFURIZATION
FLOTATION
PYRITE
CORROSION
OXIDATION
AMPEROMETRY
COAL PREPARATION
PROGRESS REPORT
SEPARATION PROCESSES
VOLTAMETRY
X-RAY SPECTROSCOPY
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
MINERALS
SPECTROSCOPY
SULFIDE MINERALS
TITRATION
010300* - Coal
Lignite
& Peat- Preparation- (1987-)