| Show 0 COLBURN FLOTATION PROCESS denver mining record the colburn vacuum flotation machine patented owned and controlled by the colburn flotation and engineering company with offices and laboratory in this city is installing one of the machines in the da stagg mill at idaho springs colorado for the broderick mining and milling company and will shortly be in operation upon ores from the lamartine mine which have been found exceedingly difficult to treat by the flotation process A commercial installation at picher oklahoma is reported to have given satisfactory results this machine is working upon the zinc ores of that district taking slimes that were formerly wasted and converting them into concentrates having a zinc content of per cent the colburn vacuum flotation machine accomplishes this work at one operation a record which no other machine lids has been able to approach ordinarily flotation concentrates cen have to be retreated in order that they may be raised in grade enough to is be acceptable to the smelters shelters sm elters in making a 3 direct high grade concentrate in the colburn machine the formation of a middling product which in any mill flow sheet soon the operator to alth either builds up and forces reduce the grade of his concentrate or allow his tails to go up in value on ore recently tested at the denver laboratory from the queen wonder mining company at wonder nov nev the following results s were obtained head 17 oz au 2983 oz ag oz aa tall tail 02 oz au oz U cone conc oz au ext au ag rao re rec c au ag |
