Show THE rattlesnake JACK company has one of the most complete cyanide mills in the black hills in describing the mine and mill of the rattlesnake jack M M company at galena south dakota the pioneer times of deadwood says the most modern and complete cyanide plant in operation in the black hills of south dakota is the rattlesnake jack mill near galena which started dropping stamps on july 19 ore from the mine adit is crammed in iton cars to the crusher bin at the top of the mill from this bin it is drawn over grizzlies grizzlier grizz lies to a blake crusher set to 2 inch opening the crushed product drops to a bin and from it is fed with cyanide solution to a battery of ten stamps each weighing pounds and dropping times per minute a distance of seven inches five to six tons of solution are used per ton of ore crushed the stamp product passes to a dorr duplex classifier which is in closed circuit with a 22 inch by 8 foot hardinge pebble mill so that all pulp entering the treatment tanks must pass out of the lower end of the classi classifier fl er cyaniding Cyan iding equipment consists of one 16 foot tank with trent settling equipment c v similar sized tank with agitating equipment and two 2414 foot tanks with the usual trent equipment for replacing final treatment is given the pulp in the second replacing tank no filter is used centrifugal pumps manufactured by the united iron works co of oakland are used for circulating tile the pulp in the trent tanks A feature of the drive is the housing of the belts between the 7 horsepower motors used to drive each pump an anil L the pump pulley zinc dust precipitation has been adopted using merrill machinery including emulsifier and precipitation press the entire plant is driven by electricity furnished by the consolidated power light co entry to the mine is made through an all adit in tile the hill at the rear of the mill this taps tile the ore at a depth of about feet below the outcrop raises have been driven from the adit level to tile the surface and a great deal of the ore will be obtained by glory holing the first of which is now in progress the ore is a thoroughly oxidized PO porphyry occurring as a mineralized zone in a large dike A small part of the gold content is in the free state probably in a fil finely iely divided condition amalgamating plates were installed in the mill over which the pulp from the classifier can call be passed but so little was saved on oil the first trial that the practice has been discontinued tile the pebble mill will undoubtedly account for tile the gold it should be reasonably expected to grind it fine enough for dissolution by the cyanide operating at full capacity seventy of or total costs of mining eighty tons daily the and milling are not expected to exceed per ton the mine crew consists of two miners one at stripping and two tr ammers two men on each shift operate the mill blacksmith assayer one or two roustabouts roust and a carpenter complete the payroll of laborers this property is owned by C B harris of galena and wm win sansom of now new york city J D harris is mine superintendent and J P hartt who recently came from tonopah To nev is mill s superintendent auperin ten lent |