Show bra bradford d ford process at pope shenon the pope shenon mill at Sar salmon nion idaho has recently been put into action thus making one more triumph for dr robert H bradford of the bureau of mines experiment station at the university of utah the mill represents two years of research by the department part ment in an endeavor to discover a method of treating low grade copper ore that would give a profit the plan as worked out by dr bradford and now installed at the pope shenon makes possible the handling of ore without water the rock is first crushed fine enough to pass through a 12 mesh screen then is mixed with common salt and conveyed to the furnace by a plunger feeder the mixture is heated to a dull red when the copper and chloride react and copper chloride passes off in the form of fumes these fumes are forced by an ilg ventilator fan into a cottrell precipitator here the cuprous chloride is caught on wires carrying a current of volts the deposited fume is shaken down at intervals and taken in closed cars to the mixing floor where lime and coke are added ready for fusion in the bullion furnace the copper chloride reacts with the lime to give calcium chloride and the powdered coke keeps the copper in the metallic condition the tailings from the rotary volatilization furnace are dropped into a stream of water and sluiced over the dump thus the ore comes from the mine car to the dump without being handled once by hand at present one unit has been installed having a capacity of fifty tons however the crushing plant has a capacity of tons per twenty four hours and with the success of the mill other furnaces will be installed keen interest shown in process the process has been receiving a great deal of attention not only among western mining men but letters from the east from canada and even from mexico have been received by dr bradford at the university arid and they are e all waiting eagerly to hear the developments so far the mill has been run n just for the purpose of putting the last touches aches on the machinery and it is expected that the real start will be made early in may alay in a recent article dealing with the commissioning ss of the new plant the mine and the e operations actions at ions of the pope shenon comy pany the salmon herald among other things gs has the following to say the mm mill was designed and built by prank frank jones s an ped experienced mill builder who worked 01 others otherl for years for marcus daly y and at si butte nillar construction in and about it is completely mple tely automatic in all its operations the ore feed being continuous and entirely by gravity it starts at the top of the mill and falls through the crusher screens rolls etc to automatic conveyors into bins and finally into the furnace out the least requirement of handling handlin even the mixing of salt is automatic and it is believed that not more than four men will be needed to run the mill during twenty four hours anyone who sees this ingenious piece of architecture is filled with admiration of the signal ability of the designer and builder its framed timbers have gone together with neatness and accuracy affording one of the most substantial structures in this part of idaho so nearly complete is every appointment that the company expects to be extracting tr copper in a comparatively few weeks and the ore they will treat will run about 5 per cent of the red metal R A perry who has been with the company during ing the past year will hold a position of responsibility in the mill for this office he has taken special training at the utah mining school to acquaint himself perfectly with the bradford process and the duties of a mill foreman he is a competent man and will prove valuable in service of the company immense reserves of ore A visit to the underground workings reveal soch immense reserves of ore that the spectator is amazed several tunnels have been driven on a vein of rich copper ore which stands almost vertical with a slight dip to the north and its width is practically unknown though crosscutting at one place shows it to be at least twenty five feet wide in pay ore no walls appear however and at every point of development they have been working in ore which in many places averages as high as 12 per cent it appears to be an immense zone in which enrichment is pronounced along the course of development but in which mineral izat on is general throughout a wide area to work from no 5 at the beginning they propose to work from no 5 tunnel which is now the lowest opening on the ground but later they expect to drive a no 6 tunnel with adit near thetos the top of the mill then to do all their mining 4 from this tunnel no 5 tunnel extends about feet into the hill is all the way on good ore and its face has more than feet of apex depth carbonates and oxides predominate for the first feet and also appear strong in the face but between and feet in sulphides sulp hides come strong in forms of chalo cite and some native copper is found and specimens of oxide occur which run above 60 per cent plenty ore in sight upper tunnels driven on this same vein show the same character of ore and persistent values throughout raises and are to be opened from no 5 permitting of extraction all the way to the surface a sufficient measure to insure the running of the mill for several years recent visitors went through every tunnel as high as no 3 and can vouch for the amazing ore possibilities of that hill A capacious and well built boarding house is provided feet in dimension two stories high and provided with basement it is of lumber lathed bathed and plastered and equipped with electric lights and running water the upper floor is devoted to sleeping quarters and the lower floor contains th the office dining room kitchen and four bedrooms A shower bath is soon to be installed on the upper floor the house affords living accommodations for thirty men and is an excellent improvement to the 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