Show THE STATE SCHOOL OF MINES the class in the metallurgy of lead is nearly ready to iii make ake the blast furnace run on lead ores in the small water jacketed blast furnace that makes up part of the smelting smelling sm elting equipment of the metallurgical laboratory this run is made once each year by the senior class and is the most extensive experiment performed in connection with the laboratory course in lead metallurgy occupying thirty six to forty eight hours of continuous operation in preparing t for this run the boys have roasted in the pot furnaces two and a half tons of t galena alena ore from the fortuna mine at bingham utah sampling and assaying the roasted ore they have sorted from the raw ore a thousand pounds of galena cerus site pieces which can be smelted smelter without roasting I 1 and have tru crushed shed sampled and assayed this material along with oxide ores from the uncle sam mine at tin tic utah and the limestone iron oxide and slag requisite for making up the charge according to the calculations that each student has been required to make from the assay returns on the ore prepared the furnace is the twenty inch water jacketed furnace of the allis chalmers company but has been remodeled by lowering the water jacket five inches into the crucible thus bringing the upper surface of the lead in the crucible much nearer the maximum heat area and thereby avoiding the formation of a slag crust immediately above the lead the boys are divided into squads of four and each squad has opportunity to run a night shift and a day shift of eight hours souvenir lead bars properly inscribed with the class monogram to be used as paper weights usually cut down from the lead bullion shipment resulting from the run R H B 0 |