The Cyanide Process An Introduction to the Cyanide Process Including the Dete
The Cyanide Process An Introduction to the Cyanide Process Including the Dete
Alfred S Alfred Stanley Miller
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The first and last compartments are usually left empty or supplied with sand filters to clarify the solution. 17. The surface of a charge of ore should be about 12 inches below the rim of the vat, and the solution about 3 inches above the ore. 18. Wooden vats should be coated with paraffin, asphalt, or coal-tar paint. 19. A stock or strong solution is not made until wanted, as it undergoes somewhat rapid decomposition. 20. Gold can not be precipitated by zinc shavings from a cyanide solution wh...ich does not contain at least 2 Ibs. Potassium cyanide to the ton solution. When the solution contains less than 0. 05 per cent. KCN, the solution must be in contact with the zinc for an hour. 21. Zinc shavings used in the precipitation of gold from cyanide solutions will weigh about 6. 5 to 7 Ibs. NOTES. 51 per cubic foot when well packed. It has been found advantageous to pack the precipitation boxes closely and firmly, as this offers a greater surface of zinc to the passing solutions than where they are loosely packed.
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