| Show denver deave r woman wom an s invention I 1 invention for complex ore treatment BY DWIGHT FARNUM within the last decade the mining world has been impressed with the conviction that it must find its future source of metals in the large bodies of low grade ores and also in the refractory and complex mixtures of the various sulphides sulp hides ar etc which hitherto have not been attractive for exploitation on account of their difficulty of treatment consequently many processes of ore treatment and various types of machinery have been introduced to live or die according to their merits among these many processes is one known as the coddin codding t process which has been placed on the market only after more than four years of careful experimenting in the laboratory in conjunction with intensive and successful mill run tests on all classes of ores chemical but not solvent process the codding process is a cold process for the treatment of raw and refractory ores and metallurgical products classified this is a chemical process b out ut inasmuch as the solution does not act as a solvent it differs from all other chemical processes the simplicity of the process is commensurate with the economy of its operation it consists of agitating the finely ground ore in a solution for a sufficient length of time to cause a physical change 11 to Nf etal I 1 I 1 engineer denver colorado take place in the mineral compound colli pound comprising the ore according to the adjustment d and an application of the process the metallic nit allic elements are freed either in the condition of native metal or else the mineral undergoes a physical change which alters its specific gravity and other properties in the case of an ore containing iron sulphide clean iron and clean zinc concentrates without were made on a wilfley table after af ter the had been treated by the e codding solution by means of this process all metals for which mercury has affinity are easily amalgamated garna ted in the codding gr avital amalgamator through which the pulp after having been agitated in the solution is passed this amalgamator consists of a bowl containing a bath of mercury and a hollow stirring shaft inside of which is a feed pipe through which flows by gravity the pulp solution where the gold and sil silver ver particles come in contact with the mercury and are picked up the remaining metals passing to the outside of the hollow revolving shaft with external lifting vanes and conveyed to the overflowing points the quiet positive action of the machine prevents mechanical loss and the presence of the solution prevents the sickening of flouring floering flou ring of the mercury the base metals and those for which mercury has no affinity may be saved as concentrates or in anscom iner mercial inertial cial borm by auy any suitable machinery but best adapted to take advantage of a pre previous by the codding process the ille following results will illustrate the successful application of the codding pro cess samples of results obtained the sulphide of mercury cinnabar has hai been reduced to metallic mercury iri in one operation without heat or chemical precipitation and recovered in the gr avital amalgamating ga a device telluride ores are amenable to the codding process and the gold and silver are saved in the grai vital amalgamator ore taken from a cripple creek dump assayed gold treatment by the codding process left only a trace of gold in the tails the telluride of silver has been broken down by this process and the silver saved in the amalgamator the amalgamation of silver is very difficult by any cold process but the inventor has mastered the freeing of combined silver and its amalgamation A very refractory and complex ore fro from idaho familiar to many mining men and known to contain sulphides sulp hides of iron lead zinc and copper as well as compounds of arsenic antimony man manganese td anese and many other elements but ahding its chief values in t old and silver was treated result resulting 1 1 in a re covery co very of 93 per cent of the b gold old and silver silver the silver is readily by the codding process amalgamated in the presence of the a bove above metals black oxide films appearing I 1 on oil the mercury causing it to separate into small sma and dis di globules glo bules are quickly counteracted of the sou persed by a proper adjustment tion test olt 0 to A group of men endeavored of send sending ing a mixture the codding process by and residue sadue tell urides sulphides sulp hides battery re of A re lecove covery rusty gold as a bona fide ore sik after a 85 per cent of the gold was made hour treatment of the mixture sheet shee t methods me continuous flow adapted to v adapted adapt 11 the codding process is readily readdy be t ma y and to a continuous flow sheet though i stalled in units of any desired d size dentyl in a unit of twenty five tons capacity g a mi ill four hours is favorable thus capacity y a ton crushing and grin grinding dint coddie would have four twenty five t ton squall so d is units the cost of equipment the up P the ingredient used in making do j since the cheso solution od tion is inexpensive loss 3 littile litt is not act as a solvent there agaid over ove and the solution is used over it is now possible for nine mine operators op florl 01 bullion at the bline mio desort make their own r bollt It wa ore carrying gold or silver eriah qt ing ot high priced methods aw and concella cOncel lt t 0 d and without shipping com complex plex gold long distances to shelters smelters sm sni elters for the Is J offer ed silver values eshe he codding process proa tr el the for method as an inexpensive of low grade and complex ores |
