Show ll ORES OUI S thod for tor tho the Concentration of ot Those o Of 01 Low Io tIrade Orade Inasmuch as nil a II considerable amount of ores have havo been found In southern and eastern Utah the fol Col following ColI follOwing lowing I bulletin Issued by an eastern mining school Is not lacking In local In Interest interest terest terel The rapidly Increasing use uso of oC tho the metal molybdenum In the manufacture of ot tool steels armor plate etc has haa no ne the discovery of or some moth od oil by bi which poor molybdenum ores may be concentrated to contain at least len t 50 60 per cent of ot the metal since ores less leu rich than this Ihle cannot bo be profitably smelted the tho principal of oC molybdenum Is Ie found wide widely ly IY distributed In various localities In New NOI Ontario Quebec and British Columbia and elsewhere It occurs In association with quartz and I also In granites gneiss and associated ted with pyrites mica and other minerals So far lithe the mineral has hall generally been by hand picking Several methods have bemi devised for tor the tho mechanical concentration of at ho the theore hou ore and some recent experiments In this u direction made mude by J W IS Wells of ot the tho Kingston school of oC mines appear to have met with success The Tho method Is III and depends upon the fact that when passed through rolls does docs not become pulverized but separates Into lute flakes whilo the tho minerals are arc crushed to pow Ilow del der As A an of tho the tion of ot time the process It may be stated that a II sample of oro ore containing to 50 0 per cent 10 per lIeI cent of ot pyrites and GS 65 per cent of at In tion to mica quartz pyroxene NC etc Ic after passing through rolls nod bo be Ing screened through a n 02 03 Inch sieve slee furnished 14 per cent of ot flakes consist Ing principally ow mica and ond Ite After Ler ft a 1 second screening through n II 10 1 Inh Inn mesh a further per cent ot of material ot of similar composition was vas WI obtained The Time two tio concentrates concentrated In each case contained about 55 65 per cent of ot I and 45 per cent of ot mica To I separate these theRo minerals several moth ode oda wore were tried but the best hest results rc were obtained with tho the Wetherill mag tlc separator tor which removed remove proc pron nil all the Iho mica and gave rao nn ji ore con contaIning 00 DO to 91 01 per Iler cent of denite |