The flotation process . ines of the tests madein the experiemental model plant, and may be briefly Fig. 20. The ore, reduced to a suitable fineness, was elevated to a hopperat the top of the building and fed into No. 1 mixer, w^here it wasagitated with the solution, the emulsion (previously prepared onthe bottom floor) being added at the same time, together with furthersulphuric acid, if required. The feed of ground material and theaddition of the circuit-liquor and reagents was maintained constantly 116 THE FLOTATION PROCESS and regularly. After passing through the first set of
The flotation process . ines of the tests madein the experiemental model plant, and may be briefly Fig. 20. The ore, reduced to a suitable fineness, was elevated to a hopperat the top of the building and fed into No. 1 mixer, w^here it wasagitated with the solution, the emulsion (previously prepared onthe bottom floor) being added at the same time, together with furthersulphuric acid, if required. The feed of ground material and theaddition of the circuit-liquor and reagents was maintained constantly 116 THE FLOTATION PROCESS and regularly. After passing through the first set of six mixers apulp consisting of ground ore, acidulated water, and emulsion waspassed to a hydraulic-sizing appliance known as an upcast, wherethe slime-gangue was eliminated by overflowing. The balance ofthe mixture was passed into the second set of mixers, beginning withNo. 7, where more emulsion and sulphuric acid were added ifnecessary. The agitation and aeration were maintained and the pulp ) MIXERS SLIIKIEDUMPdRFlTS. Fig. 20. the experimental model plant. discharged from No. 9 into another upcast, where further slime-gangue was eliminated by overflow. The balance of the materialwas then passed to No. 10 mixer, and thence through No. 12 tothe Wilfley tables. The separation on the tables was effected thus:Such concentrate as had been frothed by the aeration and agitationpassed off the table immediately opposite the point of feeding. Thegranulated or air-bally material remained in close contact withthe table, along with the sand, but floated immediately under theinfluence of puffs of air (supplied through a pipe laid lengthwiseand close to the table), and then floated off with the froth sand was delivered toward and at the end of the table, thus FLOTATIOX AT THE CENTRAL MINE, BROKEN HILL 117 exactly reversing the relative positions of concentrate and tailingas ordinarily obtained if working by gravity concentration. Theslime and sand were collected in one recep
Size: 1529px × 1635px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidflotationpro, bookyear1916
