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Show tate ress • • • SSOCiatiOD • u et1 Supplement to I INTERNATIONAL SMELTING COMPANY • ... -;, .. ~ . . .. ~ . •• • l:.;<.' .._ ,. t• .4",·· .' "· ··.. .. - . •. 1-,~ , . ,. •. _f• . ··-~ ··l '·-L • • ' ~ ~ ~' <·. . '\• '· ,. #<- ~ 1:- ., , ,•. -- ~ >::~- }:, • . .... ;. ~; ~ o< .::' ... •. .. . ~ ,. ,. *--:'"; ~: . '' .. -· ~--!1. . .... \., ~. .' . · •; General View of International Smelting Plant From Northwest SMELTING-MILLING ----------------------~-------------------------- here from the rece1vmg bins by con- ened tailing. The loss is made up ous drawing of air through the ignit- conveyor belts which elevate these The converter shells are of the horiveyor belts, crushed, mixed, and a with fresh spring water. ed bed by means of suction boxes con- mat<:.rials to the feed floor of the zontal barrel type, 96x150 inches and representative portion automatically The general concentrator feed will nected to a suction fan. Sulphur is roaster plant. lined with magnesite bricl}. ' average approximately six to eight about 12 per cent in the charge and is DESCRIPTION OF L E A D A N D separated as a sample of the lot. Two electric traveling cranes ROASTER PLANT This sample is further reduced in per cent lead, eight to ten per cent roasted down to about 3. 0 per cent COPPER SMELTER AND LEAD· The plant consists of thirty-two all material, the one in ZINC CONCENTRATOR OF IN- size and fineness in the pulping de- 1ron and ten to t·welve per cent zinc. in the sinter. The material fuses er aisle being 60 tons TERNATIONAL S lVl ELTING partment. The resulting sample of a From these heads a lead concentrate slightly and forms a clinker-like mass Evans-Klepetko McDougall roasting the other, in casting few ounces is sent to the laboratory averaging sixty to sixty-five per cent which is discharged at the end of the ing furnaces, each with six hearths COl\lPANY. capacity. for analysis. lead, a zinc concentrate averaging m.achine and falls into railroad cars. sixteen feet in diameter. The capaThree convertl:!r city of each furnace is about 50 tons The Tooele plant of the InternaAfter sampling, the ores are dis- fifty to fifty-five per cent zinc, and These cars are hauled to the blast b.fuw in tiona! Smelting company is situated tributed by belt conveyors to copper and iron concentrate averaging thir- furnace bins and the sinter dumped of feed per 24 hours. Each furnace t hese at the mouth of Pine Canyon on the plant bins, lead plant bins of lead- ty-eight to forty per cent iron are therein to form part of the charge to is fed from a cylindrical steel hopper of 10 tons capacity. • The ore and conwestern slope of the Oquin-h moun- zinc plant bins, all in the smelter made in this series treatment. Every the blast furnace. tains, five miles east of Tooele City yards. From the lead-:>:inc plant bins effort is made to produce as high Each sinter machine has a capacity centrates are distributed to the se feed char,ge c~uses and about 35 miles southwest of Salt the various ores are bedded onto a grade and clean products as possible, of 200 tons of feed per 24 hours. Fuel hoppers by a series of distributing 1cai:ned m th Lake City. belt conveyor by means of belt feed- and at the same time maintain good used is gas oil of about 36° Beaume. conveyors with travelmg automatic . pa,s,ses on to j bl I h_e VPlrt'.Pr• The plant consists of a lead-zinc ers and elevated· into railway cars. ~-ecove_ries of ti:e lead, zinc and iron The gases from the sintering plant trippers traversing the feed floor. The gases from the roasting furowmg flotation concentrator, copper smelter Th~se cars are hauled to the concen- m the1r respect1ve concentrates. j are passed through a Cottrell pre~ and lead smelter. h·ator and dumped into recdving A very complete and extensive coj- t cipitation plant where much of the naces are conducted by two brick furnace. The reduction plant site appears on pockets there. centration testing laboratory is main- dust they contain is deposited. The flues to a rectangular steel and brick steel flue railway maps as "International," the Concentrates do not pass through tained for frequent checking of ore gases pass through a flue to a brick dust chamber, 120 f eet by 140 feet by the ~last terminus of the Tooele Valley rail- the sampling mill. They are hand receipts, testing of new ores for pro- stack 18 feet in diameter and 200 feet 40 feet high, where the larger rortion descnbed of the dust is deposited. The gases ~ags. way, which runs west through Tooele sampled and dumped into bins in cess amenability, and for improving in height. City to Warner, on the· Los Angeles whatever department they are to be and working out of new treatment The Cottrell dust is either return- pass from the dust chamber into a Y a line of the Union Pacific System, and treated. processes for these same ores. ed to the sinter plant or sent to the flue-type Cottrell precipitation plant, ~ta~k :.!so on a branch line of the Western LEAD-ZINC FLOTATION CONThe laboratory is equipped with sev- arsenic plant, dependent upon its ar- where an electric discharge precipi- ee tates the remaining dust, and thence Pacific railway. CENTRATOR eral types of small batch testing ma- senic content. to the copper stack, 25 feet in diameStandard gauge railroad tracks enFrom data obtained from over two chines, and in addition has a Callow BLAST FURNACE PLANT ter and 350 feet high. ter the plant on three levels. The years of experimental and research test mill and a mineral separation This plant consists of five lead blast The roasted material is discharged "high line" or receiving tracks are on concentration work on the lead-zinc- test mill, each of one hundred pounds furnaces 52 to 55x180 inches at the from the furnaces into hoppers. From 1 a level below the concentrator and silver ores of this district, it was de- per hour capacity complete in every af>Ove the smelting plants. From the cided to suspend copper operations in way, and patterned identically after tuyere line. Each furnace has 25 tuy- these hoppers the roasted ore, or· cal- P "high line" level a single track ri~s the concentrator and remodel one 500 the concentrator. Continuous tests eres. The height from tuyere line to cine, is drawn off in small bottomto the concentrator receiving pockets tons per day unit to treat the charac- are made in this test mill trying out charge floor is 24 feet 8 inches. The durnp cars holding four tons. These and warehouses. The middle track is teristic lead-zinc ores on which the new processes, new reagent combina- capacity of each of these furnaces is ..:ars have inverted hopper upper parts used for transferring smelter pro- expe1-imental work had been perform- tions, and determining the effect of about 260 tons total charge per 24 ·which are held tightly in place against the bottom of the hopper by springs, ducts and orcs from one department ed. This remodeling was completed returning intermediate products hours. The charge cars have hopper bot- to prevent the heavy loss of calcine to another. Metals shipped from the and operations were started as a ens- which cannot be done consistently on toms with hinged drop doors, and are by dusting which would otherwise ocplant are handled on the lower tracks. tom lead-zinc concentrator on No- the regular batch testing machines. The plant treats lead, lead-zinc, vember 1, 1924, with a capacity of This concentrator is especially uni- electrically operated. They are of cur. These cars are hauled to the copper and dry silver ores, and pro- 500 tons per day. que, in that it is treating a varying the same length as the blast furnace. feed floor of the reverberatory furcrane to the conduces blister copper, lead bullion and The high lead market stimulated mixture of lead-zinc ores from over The bins are fitted with suspended naces. The dust from the dust chamSilicious ore is added zinc concentrates. the production of these ores, and it fifteen different mines on strictly a weighing hoppers. The constituent bers and that from the McDougall is blown, pro~ducing Lead-zinc ores are received mainly was decided to increase the capacity. custom basis, and making a three- materials of a charge are drawn into Cottrell treater are also hauled to these hoppers, weighed, and dropped . and slag. The copper the reverberatory furnace feed floor. from Park City and Bingham, Utah, Co,nsequently a second unit of 250 mineral separation and concentration mto a ladle and cast in Some furnaces are used for the pre- is and from Colorado, Nevada arid Ida- tons per day capacity was put in op- from them by flotation alone, and by into the charge car, while in motion, bo. Lead ores are received mainly eration February 4, 1925, which was means of the same treatment· process. thus bedding the charge in the car it- roasting of lead concentrates, materi- moulds , the slabs of copp er weighing from Tintic, Park City and Bingham, 1 increased to 500 tons per day on May These ores are of widely different self. The car is run over the furnace ally reducing their sulphur contents, about 350 pounds. These are loaded preliminary to their inclusion in the on a truck, weighed and transferred Utah, and from Idaho and Nevada.· 1, 1925, since which time the concen- analysis and general character, as and the charge dropped therein. The gases from the blast furnace charge to the sintering plant. This to !1 railz:oad car for shipment to the • Copper concentrates are received trator consists of- two units, each of would be .expected, but their general are drawn off just below the charge calcine is drawn off in standard rail- refmery m New Jersey. mainly from California and Idaho, which is handling 500 tons per day of tendency 1s to react very similarly' to The slag produced is grannlated floor and enter a cylinderical dust way cars, and thus transferred to the the process employed. and ores from Tintic and Bingham, lead-zinc ore. and transferred to the sintering catcher, tangentially. These catchers sintering plant ore bins .. Utah. The major portion of the material It is evident from this fact that plant charge bins, where it forms part Five roasting furnaces are used for of All ore, coke and fluxes handled, treated comes from the Park City such a plant provides a p1·ofitable out- are 20 feet in diameter and 18 feet new charge. with the exception of those ores re- and Bingham districts, the former re- let for the mines of this district which in height. The gases are discharged the volatilization and condensation of from this catcher into a steel balloon arsenious oxide from smelter by-proceived from the Bingham district over ceived by rail and the latter by aerial have been limited heretofore in their COTTRELL TREATERS the tramway, together with outgoing tramway. In addition to the above, output of ores of this character, due flue 498 feet long, whence they are ducts. The escaping gases from these Three separate installationt products, are shipped over the Tooele considerable tonnage is received from to the often times prohibitive zinc forced into the baghouse by a Sirocco roasters are filtered through a small operation here. Valley railway. different parts of the state and from penalty for smelting ores. This is fan with a capacity of 180,000 cubic baghouse. The condensed oxide is The sinter plant treater ha TRAMWAy adjacent states in relatively small especially beneficial to the relatively feet per minute. This brick baghouse automatically barreled for shipment. all _gases from the Dwight-'Lloyd sin lots. More favorable freight rates small producer who is not justified contains 1440 cylinderical cloth bags REVERBERATORY FURNACE termg machines, consists of 4 units Lead, lead-zinc and copper ores are 18 inches in diameter and 30 feet in bringing in considerable ore of in putting up his own plant, and at PLANT o~ two 110-pipe sections each. The from the mines of the Utah Delaware this character which could not be eco- the same time secures profitable re- length. The fumes from the gas is pipes are 12 inches in diameter by 15 This plant consists of three reverMining company and the Utah Metal nomically moved prior to the develop- turns from his shipments to such a shaken from the inside of the bags by feet in length. beratory furnaces, Anaconda type, and Tunnel company in the Bingham ment of this custom operation. c1:1st~m plant operating on a "pay for reversal of the pressure on the bag, each having a width of 19 feet and a The converter treater, handling all district are transported to the Tooele Briefly the operation consists of than a "penalty" basis . . causing it to collapse. The fume falls length of 102 feet. gas fro!ll c~n~verters blowihg copper plant over an aerial tramway which crushing and sampling the ore and to zmc rather into pits from which it is removed LEAD SMELTER matte, Is d1v~ded mto two sections: The feed to the furnace, consisting passes over the Oquirrh mountains at a considerable extent bedding the difLead ores are received by belt con- periodically and returned to the blast to a large extent of flotation concen- (a) regular p1pe type, containing 110 an altitude of 1450 feet above the ferent ores as above described prior ve~or from the sampling mill and are furnace as part of fresh charge. p_ipes similar in size to those in the loading station at the Highland Boy to sending to the concentrator in orThe filtered gases from the bag- trates, is very fine and is dumped smter to steel charge bins having plant treater, and (b) of box from the cars into main calcine hopmine and descends 1800 feet to the der to maintain as uniform a feed as adehvere~ house are discharged through a steel capac1ty of 13,000 tons. These bins plate type. terminal bins at the smelter. Inter- possible. -Standard practice of ball pers at the bridge end of the furn~ce. are divided into two sections, one of downtake to the same stack into The feed is then distributed to charge The M~Dougall 'r ~ ting- pla:r£trea mediate bins also allow diversion of mill grinding and classification is fol- which which the sintering plant gases are the materials for maker treats all gases from the McDouholes in the roof. any ore to the concentrator. The to- lowed, and then.with different reagent ing up contains the sintering plant charge and received. gall roasters operating on copper and tal length of the tramway is four additions, series recovery of the lead the other The hot gases leaving the furnaces Slag and matte are tapped from the ores, fluxes and sinter lead ores. It is of flue plate type and are passed through five 700 H. P. miles. zinc and iron is made in respectiv~ used in making up the blast furnace the blast furnaces into large movable Stirling water tube boilers. A large consists of two units each 10 feet high The ore is carried in buckets of concentrates forehearths in which separation is by flotation alone, as charge. 12 feet wide and 61 feet long ' 1200 pounds capacity, spaced 200 feet well as a final made by grayity. The matte is tapped part of the heat energy otherwise or mill tailing which Coke for the blast furnaces is untype of treater, deveioped at :r'his apart, traveling at a rate of about goes to waste. lost is recovered in the form of•steam loaded from cars standing upon an from the settler into 3-ton pots and power. These boilers furnish steam t~1s plant, has proven of high effi600 feet per minute. The concentrator is arranged in elevated trestle above a large concrete hauled to the converting plant. The for the entire plant. One boiler is Clency and has been adopted by sev~ Upon arrival at the smelter the ore two separate and distinct sections pit. Coke is withdrawn from this pit, slag overflows from the forehearths also provided with an automatic un- era! ?ther . plants with modifications is dumped from the buckets into the into a second settler and from that concentrator terminal bins of 2000 tons the _grinding equipment being identi~ through chutes leading to a tunnel into a 7-ton slag pot in which it is derfeed stoker. There are also 350 to SUit the1r conditions. below, on to a belt conveyor and is cal m each, but Section No. 1 is equipGENERAL ' capacity, or into the smelter terminal H. P. boilers, hand fired, in reserve taken to the slag dump. All A. C. power is purchased from bins. From these latter bins the ore ped with Callow pneumatic flotation elevated to a cylinderical steel coke for emergency. Lead is tapped from the blast furthe Utah Power & Light company. is drawn into special 50-ton motor cells, while Section No. 2 has mineral bin of 750 tons capacity. The gases, after passing the boilnace into three cubic foot conical pots SINTERING PLANT dump cars, weighed, and delivered to separation sub-aeration machines. The ers, enter a brick flue 18x29x1360 feet !\II D. C. power required is generated and taken to the drossing plant. ores are treated in the section or comPractically all of the fine material smelt~r receiving bins. in length leading to the copper stack m a central power house. DROSSING PLANT bination of sections in which it has treated at the lead plant, such as coninto which also the roaster gases are . In the. same building are the blowSAMPLING MILL The drossing plant contains four discharged. been found the equipment is best centrates, flue dust, etc., requires sinmg engmes for the converters the lead and lead-zinc ores re- adapted as regards metailurgical re- tering to agglomerate it before includ- cast iron kettles each having a capablowers for the blast furnaces' and _The char~e is fused and the copper all sources are dumped sults. The respective finished pro- ing it in the charge for the blast fur- city of 30 tons of lead. They are coal the 90-po.und air compressor fo-/ genw1th some 1ron and sulphur combine bins of a total ca- d?cts from the two sections are com- nace. The various materials for the fired. The pots of lead received from eral serviCe. to form matte which settles to the tons. In the case of bmed for de-watering and disposal. for the sintering plant are the blast furnace are poured into bottom of the furnace and carries the Steam is furnished verted to concentrator As regards this feature, the lead pro- charge these kettles. The molten lead is gold and silver with it. The remainder plant described in ~v.uu"' drawn from the bins by mechanical bucket is allowed to duct is sent to the Tooele lead plant feeders adjusted to deliver the desired cooled and stirred by means of com~ reverberatory terminal bins for the zinc product to the Great Fall~ portion of each to a belt conveyor pressed air which causes the impuri- of the charge forms slag which floats The down above the matte. Th~ matte is This is transfer- electrolytic zinc plant, and the which discharges them to a mixing ties (mainly copper) to collect as a tapped through cast iron launders in~ dump cars to the product to either the Tooele lead device. From this they fall on an dross on the surface of the bath. This to po~s _in the .converter building· or copper plant as desired for n~;lxing inclined conveyor belt leading to the dross is skimmed off, pressed in a slag 1s mterm1ttently skimmed at purposes. The tailings from feed floor of the sintering plant where Howard press to remove excess lead front of the furnace into slag pots sections are thickened to approxicharge is distributed to the five and returned to the blast furnace 227 cubic feet capac~~y. Slag is m.a~eJ.Y f_ifty per ~ent solids and pumpfeed hopper above each machine. charge. e? to the dump by electric -- - ·~poundmg dams. The overCOPPER SMELTER There are ten standard Dwightbves. t water from the sintering machines, 42x264 inchAll ores for the copper department Each furnace has nn • to a heat.! is mechanically smrea.\rt are cr!lslied •to uniform size and stored capacity of 340 tons ·c::a·~· In traveli bins of charge, with a ratio of e bins |