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Modeling In situ Copper Leaching in an Unsaturated Setting.


PB92157502

Publication Date 1991
Personal Author Friedel, M. J.
Page Count 30
Abstract The permeability and flow capacity in unsaturated media is investigated by the Bureau of Mines for application to in situ copper leach mining at the Cyprus Casa Grande mine site. Moisture retention properties are derived and combined with scanning electron microprobe data to characterize the mineralogy, texture, pore size, distribution, and permeability of the host rock. Finite element modeling is used to derive a saturated permeability, ambient degree of saturation, and assess various injection-recovery schemes. Recommended design modifications for optimization of solution distribution and maximum recovery from the rock matrix requires either (1) the injection pressures on the order of 1500 psi and recovery wells operating in a suction mode, or (2) performing permeability enhancement, through in situ rubblization. Injection pressures can be reduced to 500 psi with improved recovery and containment of solutions.
Keywords
  • Leaching
  • Materials recovery
  • Copper ores
  • Mining
  • Injection wells
  • Permeability
  • Porous materials
  • Containment
  • Finite element method
  • Mathematical models
  • Integrated in-situ process
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 48A - Mineral Industries
  • 48F - Geology & Geophysics
  • 68C - Solid Wastes Pollution & Control
Corporate Authors Bureau of Mines, Minneapolis, MN. Twin Cities Research Center.
Supplemental Notes Library of Congress catalog card no. 91-9848.
Document Type Technical Report
Title Note Rept. of investigations/1991.
NTIS Issue Number 199212
Modeling In situ Copper Leaching in an Unsaturated Setting.
Modeling In situ Copper Leaching in an Unsaturated Setting.
PB92157502

  • Leaching
  • Materials recovery
  • Copper ores
  • Mining
  • Injection wells
  • Permeability
  • Porous materials
  • Containment
  • Finite element method
  • Mathematical models
  • Integrated in-situ process
  • Bureau of Mines
  • 48A - Mineral Industries
  • 48F - Geology & Geophysics
  • 68C - Solid Wastes Pollution & Control
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