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This paper compares the rates of pore diffusion and cyanide gold dissolution in coarse, porous gold oxide ore particles. Several size fractions of a gold oxide ore from a Nevada heap leaching operation were leached individually in a well mixed solution of constant pH (10.5, 11, or 12), constant cyanide concentration (50, 200, or 500 ppm), and constant temperature (5, 22, or 40 °C). Particles were...
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