Show improvements IN THE CYANIDE PROCESS two decided improvements have recently been patented in connection with the cyanide process for gold g old extraction both of which wb ich are entirely worthy of consideration by b Y those who w io are building new plants one of these is the system tern by which w aich compressed air eita either er heated or at ordinary temperatures is forced through the leaching vats from below while the other covers a new style of precipitation box divided into alternate large and small compartments part ments filled respectively with carbon and zinc shavings through which the nitrate filtrate from the leaching leac h ing tanks is made to pass downwardly through the carbon a and n d upwardly through the zinc in add an electrO electrolytic electrolyte lYt i c cur current rentis is J y I 1 I 1 aa 9 aa fez yas F y 1 a U J 11 LI guyy U U II 11 U U 44 y ZIP y y ac w f a y f kept passing continually along this box and in the zinc compartments compressed air is also introduced from below with the effect that the shavings are kept comparatively clear of precipitant both these improvements are eminently practical and reson able and the pneumatic P ic cyanide process company with headquarters in denver have met with instant success in introducing them the aeration in the leaching T vats not only supplies in the cheapest possible form the surplus oxygen which it is ia well known is demanded but maintains an agitation in the mass of material being treated so that the time for solution is reduced by many hours while in the precipitation pi tation troughs the bulk of the gold is found in the top of the carbon compartments from which it can be removed at any time with the greatest of ease so that a general cleanup is only a necessity at long intervals the expense of ad d ding i n g these imp rove ments to a new or old plant is light and the company will permit their use either on a royalty basis or by an outright sale of the franchise they have already accumulated substantial proof of the merit and value of their patents and are prepared to exhibit these the cut printed herewith displays typically the improved precipitation trough and will be easily understood by any familiar with the general plan of the cyanide process for details see patent specifications I 1 |