Show description OF THE SILVER K SAMPLER ATO AND MILL sy 71 V J M CALLOW 2 7 J JVE VILL tURING a recent visit to park city aly sd JM utah amongst other things of interest the surface works of the silver king mine were visited and as their operations are extensive and their designs and construction st strictly up to date it is thought a short d description e s e r i p t i 0 n housings double let leg pattern cast iron boots with bottom pulley adjustment 2 the running of all rejections from the samplers to one centrally situated elevator which is used solely for that purpose which raises them to a sufficient height so that they 1 can be distributed by bi spouting to e ither either one of the four compartments of the shipping bins the head of this elevator discharges into a deflecting spout which can be operated from any one of the different floors to divert the rejections into their proper bins indicated in sketch 2 from an engineer ena engineers ineer Q friction clutches and aw point of view may be heavy shafting of interest to others the first three the ore from the 17 samplers each cutout cut out mine is crammed tram medby by 20 per cent the last hand at present to or fourth sampler has the receiving bins double cones each where it is ia switched CUt cutting cuttito tiDO out 20 per into the ab shipping appin bins 7 cent which may be at the head of the used as duplicates or sampling mill or further run together at will alono along into the f thence the sample mill ore bins as the I 1 goes to a small bin case may be n and from there to the the sampling mill I 1 sample grinder gri consists of machinery on the ii lines nes of a tipping arranged as indicated launder cutting in diagram 1 the tin 0 50 per cent benc operations are all automatic making a final cut from the entry amounting to I 1 of the ore till the or 65 pounds for a 20 cutting r out of the final ton lot a 1 sample for th the e assayer 41 i the upper term terminal 47 4 of the tramway is tb T h e special f e a A s situated be below I 1 0 w the tures of the plant s sampled ore bin and are is connected with the L 1 vertical ele elevators v a IN 6 running g gear gea r of the with sheet steel 8 sampler am ale r wb which ich serves gerves 3 the use of plunger feeders at each ore bin gate for feeding the 24 belt conveyor indicated in sketch 3 4 the arrano arrangement ement of the machinery on strictly symmetrical lines and the division of the mill into separate and distinct floors all elevators te terminating on the upper level the n vezin samplers in regular regula order r on the next the rolls and crusher next and the elevator boots in a very ample basement where everything is get at ab able 5 successive sampling g in in concu conjunction chetion with successive crushing down to the last cut 6 A liberal use of the double purpose of governing f the speed of the tramway and of contributing something to the power requisite for running the plant the tramway is Finlay Finla sons patent with automatic loading and unloading buckets the bin gate for loa loading dinc I 1 buckets is it a n good one shown in sketch 4 th the 0 con concentrates from mill are brought ht upun incline to sampler hud and go through practically the same process of sampling as the shipping ore the concentrating mill is in two unit a nominal capacity of tons each see diagram arama 2 the process is coarse concen concentrating tr i sands and to send them to tanks from which they are discharged by opeti spigots into two filter presses which turn out about five tons of cake per day each carrying 20 percent per cent moisture arrangements are bein being made to dry these on jigs re slime cakes together crushing jim jig with all tails after de m concentrates watering them before s sampling a m p first with rolls rex in and shipping follo wed by X pinar B N 5 Hunting tons to the he special 24 mesh 13 y features of the the amo c L arh emde 1 mill are ed tails after cruh r ap 1 plenty of a rough classification room and good fi are light treated partly V a 2 the division on Wilf leys and of the partly on brues J tra oy mill into two the former apparently Q distinct units parent ly doing one of which is the work better er tiny ag samner always held in in on the ore is for the most part a cube galena no zinc a little iron and a quartz gp Lugue but carries considerable lead carbonate the slimes therefore run high and at every opportunity in the mill occasion is taken to throw them off from the coarser which repairs are made whilst the other half is running a most commendable arrangement which many others might adopt to advantage 3 the sizing of all material for the jigs down to 21 al al round holes the use of only one hydraulic viz for no 5 jig and the feeding of the Wilf leys with only a very roughly classified pulp 4 filter pressing the slimes if improvements might t be suggested they would be A better type of hydraulic sizer forno taig one that would effect a more complete elimination of slimes the use of another such instead of the Spitz kasten now e 41 7 fa i BC dh ar K 0 one 7 e irne 0 c erTh ff A used for no 5 or sand jigs T be feadin fe edin 1 1 0 of f thin the Wilf leys with a thicker and more more carefully 1 classified product and the use of peripheral settlers instead of long tanks for set aling slimes affecting effecting a great economy of space and giving an even clearer overflow kal 1 I 1 fl AO A tc I 1 v y alt v 3 JUs itis it is possible too th at the use of lime as a coagulant for the slimes would be profitable for other descriptions of this plant see J H steele E M in E al jou journal i anal novem nov em ber berdth ath 1901 the scientific press march 1900 and june 1 ast 1st st 1901 4 the writers desire to acknowledge their obliga obligations tiong to the manager mr M J dailey for the courtesies extended to them and for the facilities given for acquiring information alsoto mr stephens stepheng superintendent su eident of construction st 1 q rh ie 4 A AU 6 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