Show THE PNEUMATIC CYANIDE PROCESS cor N Y en engineering i and mining journal the success which has attended the application of the chlorination process to the extraction of gold from the cripple creek ores has stimulated the efforts of the friends of e cyanide as a solvent amono among C the several new ideas or applications of well known principles in order to simplify and perfect the cyanide process is that of the agitation of the solution and the oxidation of the contents of the leaching tank among these methods is that patented and applied by the pneumatic cyanide process company with headquarters in denver colo that all solutions are expedited by agitation is an axium in all che chemical and industrial processes accepting this fact this company also claims that agitation by means of air currents not only hastens the action but that the oxygen of the air ii i i an important factor in in supplementing the simple agitation or stirring of the mass to accomplish this latter result currents of air are injected into ordinary tanks through perforated pipes that rest on the burlap or canvas filters at the bottom the injection of the air current is continuous with the introduction tro of the solution and pulp by this means it is claimed that a gentle agitation causes the heavier and coarser grains to seek the bottom and thus the slimes which are the bane of all these percolation processes are kept in suspension until the latest moment when the discharge valves are open the a r currents are still operated though under a decreased pressure and by the gentle stirring el of the lower layers of sand it is claimed that the solution can be drawn off in a much qu quicker icker time and in equally good shape as by ahe simple filtration A new mill employing this method has lately been installed on the gold standard mine at idaho springs |