Show UTAH COPPER MILL bingham bulletin the great utah copper mill at garfield is nearing completion and the eight GOO ton sections will go into commission this week the utah mill is built for treating tons of ore daily it consists of two sep arate crushing departments each of a capacity of tons the equipment in each or of which consists of two 7 gates gyratory crushers and two inch rolls the ore reduced to 15 inch size by the gates breakers is belt elevator delivered to of 05 inch openings the oversize of which goes to the crushing g rolls speeded to 60 r p m the 05 inch product passing the rolls together with that from the is belt delivered to belt conveyors distributing to the ton storage bin located at the back and extending the full length of the mill A 1 per cent sample ts is cut out by a vezin sampler placed between the elevator and the conveyors from the storage bin the ore is drawn through a chute to any one of the twelve sections six for each unit of tons each of the sections has a like equipment comprising two sets of inch rolls set in parallel and speeded at 80 r p m which deliver to four cylindrical of one eighth inch openings the of the goes to hydraulic classifiers while the oversize is sent back to rolls the products of the alg jiga goes to wilfley tables and the tails from both the jigs and tables are belt elevated to chilean mills crushing through 40 gesn T the chilean mill product goes to hydraulic classifiers which deliver to corrugated and smooth belt banners modified types of the johnson the total number of banners for the mill is 1104 92 to each section the chileans Chi leans number 36 and the inch roll seta sets 24 each section is complete in itself having also its own line shafts which are so arranged that any three banners may be shut down without interfering with the operation of the others the concentrates and tailings throughout the mill are gravity handled the former accumulating in a series of masonry bins below the mill from which they are crane raised in clamshell clam shell buckets for loading directly into railroad cars the concentrate product ts is said to run about 30 per cent copper 30 per cent iron 30 per cent sulphur and 7 per cent silica a recovery of better than 80 per cent of the assay values being made the plant cost upwards of ot of which was spent in concrete flooring |