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A portion of the loaded carbon is periodically removed from the first adsorption reactor This loaded carbon may then be subjected to an acid wash by treating the carbon with a hot or cold solution of dilute hydrochloric acid This removes CaCO3 that has precipitated on the carbon as well as cleaning fines out of the carbon pores
Cyanidation or the metallurgical process of extracting gold from ore with cyanide leaching agents has long been a primary method of gold beneficiationWidely used throughout the world one incredible material helps to make gold recovery from a cyanide solution possible with its ultraporous structure activated carbon is a powerful adsorbent used throughout a number of industries to
Easy loading and unloading Individual solenoid valve for each washing sequence that eliminates carbon plate and other accessories reduces leakage and maintenance to minimum Higher capacity centrifugal pumps to wash bigger bottles 500 amp 1000 ml
By pressurising the electrowinning cell the goldcyanide complex in electrowinning is destabilised and increases the electrowinning efficiency lowering solution tenors returning back to the elution column and providing the optimal kinetics for rapid eluting of the precious metals off the loaded carbon
Acid wash is employed as a unit process in the CarboninLeach CILCarboninPulp CIP process route chiefly for the removal of calcium carbonate magnesium and sodium salt from pregnant carbon
MR75 Improving Acid Wash Efficiency of Loaded Activated Carbon in a Gold Desorption Circuit P Forson12 AS Adam12 and G OforiSarpong1 1 Department of Minerals Engineering University of
In the process of washing activated carbon a dilute hydrochloric acid solution 3 is circulatedpumped into the elution column The acid dissolves inorganic foulants such as calcium carbonate magnesium and sodium salts fine ore Minerals such as silica and fine iron particles The carbon acid wash cycle takes about 430 hours Acid washing may also help in removing some of
Acid washing has proven to be a very costeffective means of maintaining the activity of activated carbon During operation carbon will typically become fouled due to an accumulation of precipitated mineral salts This reduces the carbon particle area available for gold and silver adsorption
CarboninPulp CIP and CarboninLeach CIL processes have surface areas of about 1000 m g ie one gram of activated carbon the amount of which will occupy the same space as the end of a persons thumb has the same surface area as two football fields