| Show lo INTERNATIONAL SMELTING COMPANY i r I 0 1 I. I 4 ii aw ir d hr jJ r 7 y i y r s t r I r 1 y r 4 lr a a s Tt t d fi i t d e 4 t r y r i r t r. r Y a r 4 r t tt t x 1 P a t. t 3 Y v ti y k x w k r i Ji flip F. F a r l a j t 1 t d C Ca k 1 a 1 v q ti t r r z f L Lf Lr Ls r s rpm t 1 General View of International International Smelting Plant From Northwest t S MILLING ELTI MILLING MI LING DESCRIPTION OF LEA LEAD DAN AND D COZIER COPPER SMELTER AND LEAD LEAD- ZINC CONCENTRATOR OF INTERNATIONAL INTERNATIONAL IN IN- AL S ME l L T TI TIN I N G COMPANY The Tooele plant of the International International Smelting company is situated at the mouth of Pine Canyon on the western slope of the Oquirrh mountains mountains moun moun- five miles east of Tooele City and about 35 miles southwest of Salt Lake City The plant consists of f a 11 zinc lead I flotation concentrator copper smelter and lead smelter 1 plant plantsite Site appears appearson on railway maps as International the terminus of the Tooele Valley railway railway railway rail- rail way which runs west through Tooele City to Warner on the Los Angeles line of the Union Pacific System and also on a branch line of the Western Pacific railway Standard gauge railroad tracks enter enter enter en en- ter the plant on three levels The high line or receiving tracks are arc on ona a level below the concentrator and above the smelting plants From the I Ito high line level a single track rises to the concentrator receiving pockets and warehouses The middle track is used for transferring smelter products products pro pro- ducts and ores from one department to another Metals shipped from the plant are arc handled on the lower tracks The plant treats lead zinc lead-zinc Conner copper and dry silver ore ores ores' and pro uro- daces duces du c blister copper pp-cr- pp le lead d bullion and zinc line concentrates I zinc Lead ores are received mainly from Park City and Bingham Dingham Utah and from Colorado Nevada and Ida Ida- ho Lead ores arp arc received mainly from Tintic Park City and Bingham Utah and from Idaho and Nevada Copper concentrates a are r o received i mainly from California and Idaho and ores from Tintic and Bingham i I Utah tab All ore coke and fluxes handled ith th the exception of those ores received received re re- from the Bingham district over the tramway together with out outgoing Products are shipped over the Tooele Valley alley railway TRAMWAY THA Lead lead zinc lead zinc and copper ores from ora the min mines s of the Utah Delaware Mining dining company and the Utah Metal I and a Tunnel company in the Bin Bingham ham district strict are transported to the Tooele Plant over Oyer an aerial tramway which passes over the Oquirrh mountains atas at atan as an altitude altitude of 1450 feet above the lo fading station at the Highland Boy Doy nine mine and descends 1800 feet to the terminal bins at the smelter intermediate inter inter- mediate bins also allow diversion of any ny ore to the concentrator The total to- to tal tail length th c of the tramway is ls four miles es 1 The o ore is js carried in buckets of 1200 pounds capacity spaced feet 6 K rt traveling at a rate of about feet wo u feet per minute i i U dumped pon arrival at the smelter the ore oreto I d from the buckets into into the tano to conce concentrator L. L terminal bins of 2000 tons w r r- r f. f From ur vr into Imo the lne smelter terminal From is I these latter bins the ore oreda I da drawn wn into special P cial motor dump n tt the cars weighed and delivered to smelter elter receiving bins SA SAMPLING MILL ei SP r lead and zinc lead-zinc ores re- re I ed from all U- U sources are dumped into rece vi steel bins capacity ca- ca g binS Of a total capacity Ca Ca' of tons In the case of t lna or ore th diverted td to concentrator every fifth Se bucket is allowed to proceed to tram terminal bins for foru sampling red led u PurPoses This is transferred transfer- transfer y by the electric dump cars to theA the receiving bins I A thaw shed having of a capacity 0 of standard frozen on railway railway ii cars allows cars carsT ore to be thawed before ceiling dumping their contents into the re bins The temperature Is at kept a bout out The F In the shed T Y or sampling and Il u mill la is built tt a standard in two Ions ons mill but built I in two each h with to as a capacity of per hour The ore is conveyed here from 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- by belt conveyors to copper plant bins lead plant bins of lead lead- zinc plant bins Lins all in the smelter yards From the zinc lead-zinc plant bins the various ores are arc bedded onto a abelt abelt abelt belt conveyor or by means of belt feeders feeders feed feed- ers and elevated into railway cars These cars are arc hauled to the concentrator concentrator concentrator concen concen- and und dumped into receiving pockets there Concentrates do not pass pass through the sampling mill They are arc hand sampled and dumped into bins in whatever department they arc are to be treated ZINC LEAD FLOTATION CONCENTRATOR CON CON- Fr From m data obtained from over two years of and research concentration wort on the zinc lead-zinc- silver ores of this district it was decided decided 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-zinc 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 concentrator on November November November No No- vember 1 I 1924 1914 with a capacity of tons per day The high lead market stimulated I Ithe the production of these ores and it it was decided to increase the capacity Consequently a second unit of tons per day capacity was put in operation operation operation op op- February 4 1925 which was increased to tons per day on May 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 tho m material treated comes from froni the Park City and Bingham districts the former received received re re- 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 Drie Briefly ly the operation consists of crushing and sampling the ore and toa to toa a considerable extent bedding the different different different dif dif- ferent ores as above described prior to sending to the concentrator in order order or or- der to maintain as uniform a feed as possible Standard practice of ball followed followed fol fol- mill grinding and classification is lowed and then with different rea reagent ent additions series recovery of the lead zinc and iron is made in respective concentrates ft ha w hv by flotation alone as u J J which tailing well as a final or mill goes to waste The concentrator is arranged in it two separate and distinct sections the grinding equipment being identical Identical identical cal in each but Section No 1 is equipped equipped equipped equip equip- with Callow pneumatic flotation ped 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 regards metallurgical re re- adapted as suits The respective finished products products pro pro- ducts from the two sections are combined com limned for watering de-watering and disposal As regards this feature the lead product pro pro- product duct is sent to the Tooele lead plant the zinc product to the Great F Falls electrolytic zinc plant and the iron product to either the Tooele lead plan plant plant as desired for fluxing or 01 copper The tailings from both boll purposes sections are arc thickened to approximately mutely fifty per cent solids and pump pumped pumped ed into impounding dams The overflow overflow over flow or clear water from th the thickener is returned to a heat tank for general mill use Inthis Ir In this way the only water lost in th the is that contained in the re Te respective operation the thick and I concentrates ened tailing The loss is made madet up with fresh spring water l' l The general concentrator feed will vill ill average approximately six to eight per percent cent lead eight to ten per cent nt iron and ten to twelve per cent zinc zinc From Irom these heads a lead concentrate averaging sixty to sixty-five sixty per cent lead a zinc concentrate avera averaging ng fifty tifty to five fifty per cent zinc and and iron iron concentrate averaging thir thir- ir- ir ty-eight ty to forty per cent iron sire fare made in this series treatment Ey Every ry effort eUort is made to produce as high grade and clean products as us possible and at the same time maintain good recoveries of the lead zinc and iron in their respective concentrates j A very complete and extensive con concentration n- n te i is n tamped tamed for frequent checking oford of ore receipts testing of new ores for process process process pro pro- cess amenability and f for r improving and working out of new treatment processes for these same ores The laboratory is equipped with several sev- sev eral cral types of small batch bateh 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 way and patterned identically after the concentrator Continuous tests are made made- in this test mill trying out new processes new reagent combinations combinations combinations and determining the effect of returning intermediate p pro products r o d ducts u c t s which cannot be done consistently consistently- on the regular batch testing machines This concentrator is e especially unique unique unique uni uni- in that it is treating a a varying que f M mix mixture lure 01 VI of lea K au d zinc v ores 3 u num rum um u over I fifteen different mines on strictly I 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 very similarly to the process employed It is evident from this fact th that t tsuch 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 I 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 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 LEA LEAn LEAD SMELTER Lead ores are received by belt conveyor conveyor conveyor con con- from the sampling mill mm and arc are delivered 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 mak mak- making ing up the sintering plant lant charge and the other the ores l fluxes and sinter used in making up the blast furnace charge Coke for lor 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 leading to a tunnel through chutes h u. u I. I below on to a belt ceu Del conveyor an u i s elevated to a steel coke bin of tons capacity SINTERING PLANT nANT Practically all of the fine material treated at the te lead plant such as concentrates concentrates concentrates con con- flue dust etc requires wintering win to agglomerate it before including including including ing it in the charge for the blast fur fur- nace The various materials for lor the for lor the sintering plant are charge from the bins by mechanical drawn feeders 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 belt leading to the inclined conveyor where feed leed floor of the sintering plant five charge Marge is distributed to the the feed hopper above each machine ton There are arc ten standard Dwight- Dwight t inch sintering machines Lloyd is mechanically spread The charge in ran es a thick layer on a traveling grate rate surface of the charge is ignited The by passing under an oil burner Ignition Ignition Ig Ig- Ig th the is maintained by e ous drawing of air through the ignited ed Id bed by means of suction boxes connected connected con con- to a suction fan lan Sulphur is about 12 per pel 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 discharged at the end of the machine and falls into railroad cars These cars are arc hauled to the blast furnace bins and the sinter dumped therein to form part of the charge to the blast furnace l Each ach sinter machine has a capacity of tons of ol feed per pel 24 hours Fuel used is gas oil of about 36 36 Beaume Deaume The gases from the sintering plant are passed through a Cottrell precipitation pre pre- plant where much of the dust t they c contain is deposited ep sited The gases pases pass trough through a flue t to toa a brick stack 18 feet in diameter and feet in height The Cottrell dust is either returned return return- led ed to the sinter plant or 01 sent to the arsenic plant dependent upon its arsenic arsenic arsenic ar ar- content BLAST FURNACE PLANT This plant consists of five lead blast furnaces 52 to inches at the line Each furnace has 25 tuy tuy- eres The height from line Une to charge floor is 24 feet 8 inches The capacity of each of these furnaces is about tons total charge per 21 hours The charge cars have hopper bo bottoms bottoms bot bot- toms with hinged drop doors and are arc electrically operated They are arc of the same length as the blast furnace Tie The bins are arc fitted with ith suspended nde weighing hoppers The constituent materials of a charge are drawn into I these hoppers weighed and dropped into the charge car while in motion thus bedding the charge in the car it it- self The car cur is run over the furnace and the charge dropped the therein cin The gases from the blast furnace are arc drawn off just below the charge floor and enter a dust catcher tangentially These catchers are 20 feet in diameter and 18 feet in hei height ht The gases are discharged from this catcher into a steel balloon flue feet long whence they are forced into the by a Sirocco fan with a capacity of cubic feet per minute This Thill brick contains 1440 cloth bags 18 inches in diameter and 30 feet in length The fumes from the gas is shaken from the inside of the bags by reversal of the pressure on the bag causing it to collapse The fume falls into pits from which it is removed periodically and returned to the blast furnace as part of fr fresh sh charge The filtered gases from the |
