Show INTERNATIONAL SMELTING COMPANY r f rr t r r J I I uM r r rI f S 1 fl j r J i r 4 I ti r r l i e r r. r 1 I r r J f h f j J V 1 f. J J V J fiA T k wv ifa V V J HV j v y y c vW vr Ci r. r 3 Bp A v S w riy ll 1 yf T 7 r tr r 1 rt Cr t tv r A c s r h l i 4 1 i 7 41 V J. J r. r I A h r r rr y r f f J r i ii 5 r r P PS i r 1 r r r r r S Sr y y v r- r 1 A. A rf I r. r 1 f i r p. p 1 I IIo rd T i I. I I f M I i. i l I Jo I r-c r T. iW fr 1 K iI Kl if r r F f n w u. u d l 1 IJ rl d r- r n f f t jT l Ti I 1 Iii J i r. r 0 t. t YA I I r r IJ III 1 j 7 J I. 11 r. r j l' l r 7 t i. i 1 u t I 1 J 7 r. r m o Y li r. r t 1 I 1 t 1 y c 1 T wt I 1 jJ P A ly F I vol o c.- c. s ar m i t I- I i 7 f iI j i i I 1 f Y f 7 f l J I. I I J. J a r. r J Hl t lv ir t. K I J f T 1 l l o If IL rI 44 rC 7 ti ri A jI otC J f l I. I 1 r fl mt t 7 i 1 Z NI c 1 JO w. w pil 1 j fi l t k General View of International Smelting Plant From Northwest t SMELTING MILLING TING MILLING DESCRIPTION OF L LEA LEAD E A D DAN A AND N E D COPPER SMELTER SHELTER AND LEAD LEAD- ZINC CONCENTRATOR OF INTERNATIONAL INTERNATIONAL IN IN- S SMELTING M 11 E L T TIN I N G COMPANY t The Tooele plant of the International International International Smelting company is situated at the mouth of Pine Canyon on the f E western slope of the Oquirrh mountains mountains mountains moun moun- five miles east cast of Tooele City and about 35 miles southwest of Salt SaltI I Lake City The plant consists of of a zinc lead flotation concentrator copper smelter I and md lead smelter The reduction plant site appears on railway maps as International the terminus of the Tooele Valley railway railway rail rail- Tooele way which runs west through City to Warner Varner on the Los Angeles line of the Union Pacific S System stem and also on a branch line of the Western Vestern Pacific railway Standard gauge railroad tracks enter enter enter en en- ter the plant on three levels The high line or receiving tracks are on ona ona ona a level below the concentrator and above the smelting plants From the high line level a single track rises to the concentrator receiving pockets and warehouses The middle track isk is L k used for transferring smelter products products pro pro- r ducts and ores from one department to another Metals shipped from the I plant are handled on the lower tracks lead zinc lead-zinc The plant treats copper and dry silver ores and produces produces produces pro pro- duces blister copper lead bullion and zinc zinc concentrates I mainly zinc Lead-zinc ores are arc received from Park City and Bingham Utah h and from Colorado Nevada and Ida Ida- ho Lead ores are arc received mainly from Tintic Park City and Bingham Utah and from Idaho and Nevada I Copper concentrates a are r l' e received mainly from California and Idaho and ores from Tintic and Bingham Utah All 01 ore e coke and fluxes handled with the exception of those ores received re received received re- re from the Bingham district over oyer the tramway together with outgoing products are shipped over the Tooele Valley railway TRAMWAY Y l Lead ad zinc lead-zinc and copper ores orea from the mines of the Utah Delaware Mining company and the Utah Metal and Tunnel company in in the Bingham district are transported to the Tooele aerial tramway which plant over an I passes over the Oquirrh mountains atI atan at atan an altitude of of 1450 feet above the theP I P loading 7 station station at the Highland Boy Eoy mine and descends 1800 feet to the terminal bins at the smelter Intermediate Intermediate Intermediate Inter Inter- mediate bins also allow diversion of ot any ore to the concentrator 1 The he total total to total to- to I tal length of ot the tramway is is fourE four I E miles The ore is carried in buckets of 01 1200 pounds capacity spaced feet apart traveling at a rate of about GOO COO feet per minute Upon arrival at the smelter the ore is dumped from the buckets into the concentrator terminal bins of 2000 tons capacity or into the smelter terminal bins From these latter bins the orois ore oro is drawn into special ton 50 motor dump cars weighed and delivered to the smelter receiving bins SAMPLING MILL f Copper lead and zinc lead-zinc ores re reI received ref re- re I f from all sources are dumped into steel receiving bins of a total capacity capacity capacity ca ca- f of tons In the case of concentrator company ore diverted to bins every fifth bucket is allowed to proceed to tram terminal bins for sampling purposes This is transferred transfer transfer- red by the electric dump cars to the receiving bins A thaw shed having a capacity of I 20 st standard railway cars allows cars of frozen ore to be thawed before dumping their contents into the receivIng receiving receiving re re- re- re bins The temperature is kept at about 1200 F. F in the shed The sampling mill is a standard Taylor and Brunton mill built in two sections each with a capacity of tons per of Vir nf hour The Tho ore is conveyed here from the receiving bins by conveyor conveyor conveyor con con- belts crushed mixed and a representative portion automatically separated as a sample of the lot This sample is further reduced in size and fineness in the pulping de de- The resulting sample of a afew afew afew few ounces is sent to the laboratory for analysis After sampling the ores are distributed distributed distributed dis dis- dis- dis b by belt conveyors ors to copper plant bins lead plant bins of lead lend zinc plant bins all in the smelter yards ards From the zinc lead-zinc plant bins the various ores are bedded onto a abelt abelt abelt belt conveyor by means of belt feeders feeders feeders feed feed- ers and elevated into railway cars i These cars are arc hauled to the concentrator concentrator concen concen- I and dumped into receiving pockets there Concentrates do not pass through the sampling mill null They are hand sampled and dumped into bins in in whatever department they are to be treated ZINC LEAD-ZINC FLOTATION CONCENTRATOR CONCENTRATOR CONCENTRATOR CON CON- From data obtained from over two years of experimental and research concentration work on the zinc lead-zinc- silver ores of this district it was decided decided de dc- de- de to suspend copper operations in inthe inthe inthe the concentrator and remodel one tons per day unit to treat the characteristic characteristic characteristic charac charac- zinc lead ores on which the experimental work had been perform perform- ed This remodeling was completed and operations were started as a custom custom custom cus cus- tom zinc lead-zinc concentrator on November November November No No- vember 1 1924 with a capacity of tons per day lay The high lead market stimulated the production of these ores and it was decided to increase the capacity Consequently a second unit of tons per day capacity was put in operation operation op op- op February 4 1925 which was increased to tons per da day on May l 1 1925 since which time the concentrator concentrator concen- concen consists of two units each of which is handling tons per day of zinc lead-zinc ore The major portion of the material treated comes from the Park City and Bingham districts the former re received received received re- re by rail and the latter by aerial tramway In addition to the above considerable tonnage is received from different parts of the state and from adjacent states in relatively small lots More favorable freight rates are bringing in considerable ore of this character which could not be economically economically economically eco eco- moved prior to the development development development develop develop- ment of this custom operation Briefly the operation consists of crushing and sampling the ore and to toa toa toa a a considerable extent bedding bedding- the different different different dif dif- dif dif- ferent ores as above described prior to sending to the concentrator in order order order or or- der to maintain as uniform a feed as possible Standard practice of ball mill grinding and classification is followed followed followed fol fol- fol- fol lowed and then with t. t th different reagent additions series recovery of the lead zinc and iron is made in respective concentrates by flotation alone as aswell aswell aswell well as a final or mill tailing which goes coes to waste The concentrator is arranged In i two separate and distinct sections the grinding grinding- equipment bein being identical identical identical cal in each but Section No 1 is equipped equipped equipped equip equip- ped with Callow pneumatic flotation cells while Section No 2 has mineral separation sub-aeration sub machines The ores are treated in the section or combination combination combination com com- of sections in which it has been found the equipment is best adapted as regards metallurgical re re- re The respective finished products products products pro pro- ducts from the two sections are combined combined combined com com- for watering de-watering and disposal As regards this feature the thc lea lead leaa product product pro pro- duct luct is sent to the Tooele lead plant the zinc product to the Great Falls electrolytic zinc plant and the iron product to either the Tooele lead plant or copper plant as desired for fluxing purposes The tailings L' from both sections ons are thickened to approximately approximately approximately fifty per cent solids and pumped pump pump- ed into impounding dams The overflow overflow overflow over over- flow or clear water from the thickener is returned to a head tank for general mill use In Inthis Inthis Inthis this way the only water lost in the operation is that contained in the re respective respective respective re- re concentrates and the thick thick- ened tailing The loss is made u up P with fresh spring water The general concentrator feed will average approximately six to eight per cent lead eight to ten per cent iron and ten to twelve per cent zinc From these heads a lead concentrate averaging sixty to sixty-five sixty per cent lead a zinc concentrate averaging fifty to five fifty-five per cent zinc and and iron concentrate averaging thir thir- ty-eight ty to forty per pcr cent iron are made in this series treatment Every effort is made to produce as high grade and clean products as possible and at the same time maintain good recoveries of the lead zinc and iron in their respective concentrates A very complete and extensive concentration concentration con con- i testing laboratory is ma maintained maintained main main- p-j p tamed f for fYr r frequent checking of f Ire e receipts testing of new ores for process process pro pro- cess amenability and for improving and working out of new treatment processes for these same ores The laboratory is is equipped with several several several sev sev- eral types of small batch testing machines machines machines ma ma- chines and in addition has a Callow test mill and a mineral separation test mill each of one hundred pounds per hour capacity complete in every wa way and patterned identically after the concentrator Continuous tests are made in this test mill trying out new processes new reagent combinations combinations combinations and determining the effect of returning intermediate pro products p r o d u c t s which cannot be done consistently on the regular batch testing machines This concentrator is especially unique unique unique uni uni- que in ill that it is treating a varying mixture of zinc lead-zinc ores from over fifteen different mines on strictly a custom basis and making a three- three mineral separation and concentration from them by flotation alone and by means of the same treatment process These ores are of widely different analysis and general character as would be expected but their general tendency is to react ver very similarly to th the process en employed pl It is evident from irom this fact tact that mat such a plant provides a profitable outlet outlet outlet out out- let for the mines of this district which have been limited heretofore in their output of ores of this character due to the often times prohibitive zinc penalty for smelting ores This is especially beneficial to the relatively small producer who is not justified in putting up his own plant and at atthe atthe atthe the same time secures profitable re returns returns returns re- re turns from his shipments to such a custom plant operating on a pay for zinc rather than a penalty basis LEAD SMELTER Sl l Lead ad ores are arc received by bv belt conveyor conveyor conveyor con con- from the sampling mill and are delivered to steel charge bins having havinga a capacity of tons These bins are divided into two sections one of which contains the materials for making making making mak mak- ing up the sintering plant charge and the other the ores fluxes and sinter used in making up the blast furnace charge Coke for the blast furnaces is unloaded unloaded unloaded un un- loaded from cars standing upon an elevated trestle above a large concrete pit Coke is withdrawn from this pit through chutes leading to a tunnel below on to a belt conveyor and is elevated to a steel coke bin of tons capacity SINTERING PLANT Practically all of the fine material treated at the lead plant such as concentrates concentrates concentrates con con- flue dust etc requires sintering sintering sin sintering sin sin- to agglomerate it before including including including ing it in the charge for the tho blast fur fur- nace The various materials for the charge for the sintering plant arc are drawn from rom the bins by mechanical feeders eed rs adjusted to deliver the desired portion of each to a belt conveyor Which discharges them to a mixing device From this they fall on an inclined conveyor belt leading to the feed floor of the sintering plant where the charge is distributed to the five ton feed hopper above each machine There are ten standard Dwight- Dwight Lloyd sintering machines 1 inch inch- es The charge is mechanically spread in a thick layer on a traveling grate The surface of the charge is ignited b by br passing under an oil burner Ignition Ig Ig- the on is maintained by ous drawing of air through the ignited ed bed by means of suction boxes connected connected con con- to a suction fan Sulphur is about 12 per cent in the charge and is roasted down to about 30 per cent in the sinter The material fuses slightly and forms a like clinker-like mass which is dischar discharged ed at the end of the machine and falls into railroad cars These cars are hauled to the blast furnace bins and the sinter dumped therein to form part of the charge to the blast furnace Each sinter machine has a capacity of tons of feed per 24 hours Fuel used is gas oil of about 36 Beaume The gases from the sintering plant are arc passed through a Cottrell precipitation precipitation precipitation pre pre- plant where much of the dust they contain is deposited The gases pass through a flue to a brick stack 18 feet in in diameter and fe feat fedt t tin in in height The Cottrell dust is either returned return return- ed to the sinter plant or sent to the arsenic arsenic plant dependent upon its arsenic ar- ar arsenic ar ar- content BLAST FURNACE PLANT This plant consists of five lead blast furnaces 52 to inches at the thc tu ere line liner Each furnace has 25 tuy tuy- eres The height from line to charge floor is 24 feet 8 inches The capacity of each of these furnaces is about tons total charge per 21 24 hours The charge cars have hopper bottoms bottoms bottoms bot bot- toms with hinged drop doors and are electrically operated They are of the same length as the blast furnace The bins are fitted with suspended weighing hoppers The constituent materials of a charge are aie drawn into these hoppers weighed and dropped into the charge car while in in motion thus bedding the charge in the car it it- it self The car is is run over the furnace and the charge dropped therein The gases from the blast furnace are arc drawn dram off just below the |