FLUIDISED BED PLATE INCORPORATING POROUS SUPPORT, PARTICULATE MATERIAL AND SHOT

摘要

A fluidized bed plate has been provided which provides uniform flow of a sodium-gold-cyanide or sodium-silver-cyanide solution in gold and/or silver recovery by means of sorbing or desorbing in a fluidized carbon bed. The bed plate comprises a floor grate which supports a screen mesh which in turn supports one or more layers of shot. Carbon particles are supported by the shot. The flow of the fluid is uniform through the mesh and shot because of the arrangement of the voids created between the shot due to their natural stacking characteristics. This fluid flow is effective in fluidizing the carbon particles uniformly with little abrasion. A unique tank design permits desportion of the carbon particles while the tank is temporarily taken off-line. After the tank is reactivated it can be placed back on-line as required. The fluidized bed plate of this invention can be used in a column where processing of the solution in series is desired.