Document 85zKJOdxeYbRqzQLXzVMZ8egK

| ir ? .. ... .~v.. 4 * t- t.: *_. i, .vc---is **. *: csi-Jdisa gt? etifi-aso ?t c & ibr> ... - tsi 5..;. ' ..... ..... _ I'.- - ' ftrasia&sj d tia tel.- e?** n'r* ;p':. Ss <s s sk ? p :! S* 04:; r^:? f/.is*e*te3 gvsa aeasi Xt-si <:. :--- . risvi tUi i-'- *.*"J " si.-. ' #sttSsrs, ee wsli &s ti s' !s.r.- -; efi9 {\)e cwis-lv.? czd (..- :/ ,:f c-ue : '.' ecmssiva tolztiea (c*3` ;. e. '. - : ;."t br fceio) tfe*. tea tec : - . ' sues ea Xsod ia m.r V j--".2t* .- Ktssw, this roiaU.-.-; : *ig&r.lc# alley* of 4',*4' '* cai ttssrtsit3t?pss c-t rtv.3 cf C-C". ' ' .i jtf year ul tcoeiism faster* iterirt t> jc-.-t 1' s&u'J**, t&s c4i: .-at Ua#- Oeotaiaod, la oddities, 1.5 8W9 par liter o' ris^Et&a tri tlw.-. t- toss G apparent offset eo Us lwi lintftit* Cite? Isa'. JIs k ! r^cisw-v: f~.:ic# ota, have given c*er 16 years sag* II eat osrs&ea teisSisg rssi-isr gsj-t2 s~ tsryias teaserataros j u i?mt3oqcitmy Kisfce? ... tbs Xoeephtpsn eseltor for tbo production of eloctrottercis sin? is teft* tod ea the Ohio Hw about 2$ nil** northeast of Pittoborfh, In eZi&tliZt to concentrates frea the oRpany (sines la St Lawroree Cr-c.ty, Ko Tort, foriC eros ere now hea&ad ra such pieces as Quebec end frgoatid* The operation* of tbs c m2ter e-css 1st of i (2) fiosstiM the salfide ccr^ffitnUt) i. (2) Ccc'. ia-* tha rolfva- <Slor. %J9 into eclftile a^idj (3) Ir <t) c , - {<) >r-c '.ten of ft etecr-2 ?': r-t-i-tur* ait.'.csf frss tla eelwi^f - t ad ef <c s' ' ' t; e * cir - rr* . ' ,` nrss fej 5ls4tr*?? vris ssiimt (6) C-. . ic. C. n*v < " c`S.-5 r*' -;? to fc; ' f ; gi.tl - : i, ; %. : .T. -' ..* &;; ' gi.fi-; fj ' (7) Via ti'. , .tic.; U. . ty the rotater and fi. fi i.o...-.v- .'..is r"fi t.r,-;. - in ti-n. al.^c. >. plast far toparstita el i**.-S uifeto, ee-jois: k-u * *L* ;> oulfate* ~ 1^ LIA09839 **. -' ' At prc&ssib, esr^rirasblsa of 8? KT-lpsasst 111 te&sg etoai a terszszs, "3 is f'm* 9$#8&tar0 figs fee stea*4 K35if tws ? efesst Sets la tee e>> - -ijSRi3 A ttms mh u e!j3 ftltore. tist Cottrells^ iaitl S toa&lis . ' . ' K esmtt &&3& erd o css settle? && iOO ft.ia dtsEsic? sldeh till to ptsssUS? .tto 2*ad earned teak *v*r teaila, ' ' -' ' ---' i i'W ' . fei J. - - ,* ' r ' - n* &f>*3S*eaa &se *edttr e M 4bifed iato tfei fotteErijtj jgLcotsi ' res-rtfs* ess fia^, e*14 jsSsst, Xsh pie** easier plant, I'cr^s.?# -- f& tog tess. a* t m Sai&rsstsi ia iss& arts?3&ea tali t, srsae ieaff ife gSp sxa padfiattle plea es felsst is vtous fcf Ssl & tis ant Icei to *2f oasi*- fifes? f1;-: -i, ? cf lcsfi e^ssssh aro used ti s<Qst sf tea essMar' <sf aili to &*$s334 teinr. fv ELgh grtdei dee wslfids esc (5?? lira, JSg calfur s&tb esdl gssapcssasg&s * of lesd, irca ass! ca&siCT) is Feasted fcr cboit IS tesa et ?K> to -0 G* to esswert It to creSa Elos <sd&> (oslcine). Ths ee^Ura prafeisto era teles threat a easts tost toils? froa which steea Is previdsd for plant uses* <R .raVfela arcs la tfcs hearth foresees ctir op a very fine ore dust v&oh is rsswad frea the gts tor a Cottrell (electrical precipitator),. tototm in tfcs pl&A ea Ua hot Cottrall or dost Ccttrail. The hot {u (WO C.-55b F) wt*rs the serobtor cooler (see Cesslnss So. l and 3) vhsre in a brick lined ehantor It passes covsrtereurrent to ooolant linear and then passes eparard through 13 ft of spiral rln* peeking* Dosmnl ' floo of drcolatlng tine sulfate solution {analysis bale*) cools the hot gaa before it enters the alst Cottrells* Here the sulfur triezlde la razored in the fora of a eulfario acid sdst. end this drip sold is run to a settler tank whsre It Icina the returning coolant frea the scrubbeivoooler* After passing through the too exposed tube alst Cottrells the SO? ges passes through a pro* lisinary coke filter and then a final coke filter* Drip acid fra* both coke filters is seat to the eettler tank as shown on Drswing Mo. 1* tbs gas then pastes on to tbs add plant where concentrated sulfuric add is aeds by tbs contact process* C. EqqiRgST D3CRIffI0M The first place where the hot SOj gas encounters lead ae s lining is in the scrub tower* Here the gas enters s hunted fler chseber 6 ft* 9 in* hl^i constructed of 12-lb* lesd end three courses of add resistant brick on the betton and 12-lb* laad and a 12-in* courts of brick oo the tides. The gas enters at 290 C. through a east Iron entry sleeve, passing through the dcmwrsrd circulating coolest* The upper portion of the chamber is constructed of 10-lb, lead and one course of brick and is packed to a height of 13 ft, $ in* with 6-in. and 3-in* single spiral rings through which the cooling liquor flews at a rats of lS~lb, per sin* for each square foot of cross section. The top of the scrub tows? is fabricated of 10-lb, sheet lead supported by 2-in, steel pips on 1 ft, centers over which are wrapped l-ln. supporting bands of lesd* lino sulfate sduties see* talning frea liO-liO g/1 of sulfuric sold is used as s oooling solution and circulated ss shown on Drawing Mo, 1 through lead pipe and lesd lined equipment, la pusping the gae through to the sdst Cottrell 10 in, of wscuun ere applied. *- -*??jp^gyyjBjgiip,.f 1 LI AC 96 40 f Ctuu^ciX & i.Lr vt-r~. ..,. I*.* ** r-' r K Isstl:-irl In Via &:?* ''Sj /` fr-- 1 CJ "r rs''- ?.' :1 'J ft *. - i * f a rtHKlr"* cssltra &t ssttU-vi, . ..' t: .; Itsi .: r Ct* ** *- C* . .-` C- t " 4# i- * 1 ! 1 C - * ' . T 1 . - '* *.** T c^ -r,z sr.^r si t:.; ms cf ' r . - ' . C r.-,vs? *c^ Crrs >`-S0 T tf*. ;.- jr:c si C."* J Ct ; ': t. . .. C' i V ' C-- r. ' .. ' %l . e.r- f i - i V \ ,3*.. e* ... i v; > its,', . 1. efts? j iL . r . ; *:,' t . - ? . *, ,* t '.'Jxr, l.j n* t ~ 3.. . isvcstsl . *.. ~u* u -- 4* fc'.- i t__ V -. 4 .4 . . ..^, fv. O; b*"-* Lr.. r.. .* ... * frc r :*-? c? 5`! c.' i'-*; . . -? e* ua! sal m esj&twTC'S ccn^t: ;. -'.' .1 tv ... . t IW; ^ L-tii# A *Lc.*4 cl; s re*i'c'* of L-r < ; c. . . V crr ^X rnf tl-*3 vss-;^^ 1*l : . c.?..:. fc_.\ ;. t: tL. c&tu L-,rf t>3 esv r-'M-r i> Is r..:? t t :.:. tl > tj-f-a re - rfi~L^4 fa? tL-8 t... ..V lia%? Lr'i-i-k-'* v.f-* C--'-'.' .V trL-I 1*03 e&. V^vvi tbi vrteZtm ct". :. L cf ca.*icri.o trd oR*?vs?.-.i t; is *l. oto 1a ttk:z~ez to Ktm osif-ij of fcciai osa bi t*4 u ostwa In t". .inj J to lcntut tta sost ef XI .:.* gtoeai In tb* HtUir, Ccns*t?^o Xsci flews 111 r3?r* slti-.js ftrsa ibo li:^d sluiir' trtp st t! bstvca cf thi Tise X34bc X*ed <n tii* slep Ins tllas *111 bs ofported If s srlM of lssd *orrd ttesl strsfs oeo> Ttrfir^ t*rd tiw e*nV*r, In pise* of coo long str^f fros top to bottaa, short trifo *1U3 s 6*la, cap bet**n osAb strop lsn-U. cf 3 ft. *111 bo sod. Alaog snjr drcwfaroaoo, 2u to 304a, mil bo tbs sasiaas dlstsaes bstastu thsss straps* tftor Xosvlnf ths scrub tonr tbs (u nsxt psssss tbroogh too sspend Mbs slot Cottrolls in sorlss *hlch nmons tbs sulfur trlcadds in tbs gss ss S solftrlt sold id st. In tbs Cottroll stsol lssd co**rd star-chspod lns sro suspoodsd In tbs ooivtsr of 10-tn di**t*r lsikd tulos *hlch sro pooltisol/ obsrtod and solloct tbo cist which has bocaM notti*l)r ebsrpod fron ths star vlros. A potoo- tlal of 60,000 to 70,COO volts D.C, is aalntalnod botwson wlro sad tubs. In a tTfleal Cottroll tbaro in 96 load tubs# lO-ln. la dlaaotor, 12 ft. lanf sad two { t t tubas 13-In, In dia&oter *hleh 000Vein the two load eovorod stool swppcrtli* bars i that support ths bottos tram work vhleb kseps the wir* contorod in tbs t^os# 4 ' i Tbs tuboi ars aiposod to the ataospbsro alor^ approxtouituly 2/) of their length shila tosperaturoa Inaldo u.7 fras 25 to U>'J C. Th* shout load fosml&c tbo larfS upper and lo**r cheebors is aupportod by *ant of horlsoi.trl stool strops tr-da. vide on 12-In. contort. Thoro are 32 tons of 10-lb. shoot lend is tbs Cottroll wtdeh Is 2& ft. 9 In. Is hsd^it. Ths ,,as nort passes tbrourh two coke filters todeh ar rsotanfalar ehasbors ; eonstructod of 10-lb. lead. Tbs first of the*, has 6-in. of 2 to 5 swsh coke sad tbo second has ii ft* of eoku varyinf la sis* fro* 1-1/2 in. doon to 20 or 10 *tsh. Drip anid frai those units la takvn through load pip* to ths settler while the SOf i j (as Is passed through drying town, which It tbs first step Is tbs contact proceed for asking eoncontrstsd sulfuric acid. j4 lew oontrlfugrl typa hi ewers, ardo by loots-ConnersvlUo and tbs Clllot Coaporgr are being Installed at prssvnt for 80] *na pspinfi Until rocontly positive dlepUeenent hlowere bare b*a used, i s.nxrcmjct: or it x d e Throughout tho purifUrtlon plant load has given very satisfactory eervlos in tho 17 years cf oper-tiar., Thu gee enuring the scrub to-ur, aenrtrwotod la 1937, st 290 C, (55- f.) is aoeh too Hot for contest with load end sntoro through I s seel iron alscv*, Ro*vr, beyond the sleeve 12-lb, Lead eovurvd by 3 seursus st sold resistant brick has dens the 30b of handling the hot oorroslve 90f and 90) I LIA09841 C&jss&osl BellxVin 25s.. U * wp es tfcsy p** through tte eooURfe liquor. Slss cSy* teller trash!* *te834 la th*end tower eas spalling of tte brick which expos-*4 tte Uet, scwisij it to salt oct, to toprerte design has eacplctely elitocidi& tide c-yjiVjs <4 v*-c:;3lj Ir ths alvt Cottrell IdgSt voltages threw .let* salferie scid out c-f t-'s? 4 a&stx& gas ctr&sx m to toad jpdsa# at tospcratarss ras^toe fwa C* f*H mssa length T esswto 1? toot toad tea bean <.*& la totb atr-l- f^v;4i; es? t ': .- -Jb& filte* (flrR es.cs essstraebte to 193} &tb *glis&* tccc-Jsi'Aj . Cometoa tes H*aato tea tel to tte fall sadJO-fs* oatt'-T- ttr"- -.-'"'S hcsdle tea coolant uw4 to ilia 90s ccn*fe9r*eesls? H5 ?? v - s. ;.. . itnlM to too given fcsra by ttes tote liotogt <u& pip# Sssiell*'.-' ts &.v - F&' the foltos&gg escsusin solution et ^s*sS>ic gr-!j taf 14&S >' Z&SS&Jg&SS aw ..................... .,....-- . . )?,; grass per liter CtealV" i-. ! .i> . -- " 2.ii7 * * Iron (ferrous)-- ----------- --...... . U.l Sulfuric Add.. ------ --------------------$6.$ 1 Chlorine-- .............. ........--... 1.? Daring the part 18 Booths ths dreatoat has aontatote to addition te the above, appruxtoately l.S g./l* of fluorine with no apparent effect on th tote lin ings. Tbs abort solution has been tsstte with various bronaaa and durlaot and worthits types of stainless alloys which haws basn found unsatisfactory aa ttey bars corroded at rats* of O.OOb to 0.1 to, par year and cccellas* faster, I. pqtraoa)cs cr crust rmn or u x d syn^sc t 1, Evaporators* Two tubular evaporators art used to tbs toach plant io'concentrate the tine sulfate liquor. These are of l-l/2-in. cart lead and have an (04nt ataaa chest through >< which run a large nusfccr of 1-1/Ii-ln, outsids dtonstsr tides SO-ir.la*. Vs c u u b applied is 20-?}-ln, of rcrc try. Generally only on# of these evaporators is in use at a tins (with the 1 otters as a stand by). Tates to cos evaporator are of carbon costing i,00 each while the otter contains ,17.00 lead cow < ered copper tubes. Tbs cheaper carbon tubes break frequently but tbs lead^ooper tubes fell because of pitting with lares holes forcing and no particular tins rats of failure involved, axespt for the excessive breakage feature ths carbon tubes give excellent service. It is a toss up which is the bettar tuba fros ths standpoint of length of servioa end coat of tube. Tor future design they nay go to 7Jt antlncutkl toad tubas and out abort the length of tubing by using two shorter strew chests in place cf ths Bo-in, chests now to use. ' 2, Cryvtalllt.r. In the leach plant following evaporatica the tine sulfate liquor la crystallised to c rubber lined eoouoa crystalliser, A special )/&-in, hard rubber lining is bonded to ths steel shell wherein the tine sulfate crystal* are ag itated. Tide hard rubber lining r.tlrts abrasion ty the crystals, lucapt for extensive failure around the nanhcls It has given good service with only tenor repair* required to atoost 10 years. " limWjW'iiiyiBtr I' U- in.ny?wynrsjui..Miln [ 1,. J..I mwjitr ."-"In-f --- LIA09842 m Cbapisal fcils*<ia h. - 1* ?-'.-- * ' ' *, ton Mis *n> reE?:-s4 tos V!..i sc; ` i by wa tt 'L,-.'. - .,> rtfisry fi-cva filter* TLr .-'re is in cj/*v/.s-r if 2C% icryct In its }" ys*** c." <yi?*etim t5&3 er:i to# rc"\ii*i no rep-vine r'Arr itoi c*. cs ' r-iSMal WplfiSiMi-Tit cf tis filter cit-til F5&i8? iiMi't), Iti VeA*** in tor?* J**-6 f.t-vx** R-r-'c* Iz.-rra I&s, s';.-',":, ."..''T. - ~ ' . ' . 'to:; ` " to1- :t r!.rr. tv -V - v,;1 C-/" ' . " io i"id Ji (_y, :_ '. . t v ..... - t G / ?' * C'' * Atoto V-., ,; r toto ... ;'M . to; ' to 2 c l - lii'Md frsa V.5 ft : to. \.. f`. ' c . .it j..<: -' r. ew.sci - a sr;..;? Kr. ' * v, * . Ir;: teto? ciSz'.iai&i to ii jif (jr^ton,, ! \ > ^s.tc.: f-s raises Jp gca iiassise ar-crri cfp:-' - rtv-l sr*2ta* She e fl is trsjrviUy cy-MM-i end ttizASg Gto&si fcy tere&-4 ths cir cular Xjd ewsrod etol plats fOJ to tha pcth of the e*s flew* 5. Jleeotica -filter Arcs?. 6?erel lead lined racttca tELia^Ss'Cfc.u^ieSa i'iL::nis5o,'t^*n asosilcsst witioc, hand- lifts tno&S Otto? c*Urials s dilate sulfuric sdd. Tbs colony cn^inotr* trs particularly cartful t.n coswintciing ttoo* le*d lined tanks to that ths sheet lead is fixaly pressed against a eaecth stscl surface, Zt Is iwcr.tlwe that there he d o h'jr edu behind the lead tank linlai* ill eld Htei, slag platters, ocmer* etc. are chipped, tta (round saooth before Urt lead sheet it applied, Another pl-rrt practloe here that la net (enerslly obeersed alaearfaere la tlo uae of voodea foma cut on a proptr redlua to preea tha sheet load final/ t|dntt tha tank, A lead fllttr press has also sletn (ood serriee filter 'i ing oat lead gulfate suspended in track add. This lead aonpoond j la shipped to tha oaapeny's Usd works in Klseourl for rcflnin*, 6, Dorr TMckner, Leseh plant cqulpocnt Includes a 60-ft, dtsaeter Bc-rr IhickriLr. The tank is of oonereVo lined with 6-lb, lead which in turn is eovertd with add-proof brick. The rake Mechanic* is of steel, lead centred. The rakta then*Ires era of hard Uad cootdnlnc s dispersion of threat on resistant refrrxtory (reins. This rckc octal is kna to tbs trade ad *pl\ari>ala** i coKvsicn Vhsn the teoperaturt cf the cerrodrs SOj and $0\ sapors Is reduced by ths Scrub tower to a rang* suitable for contact with lead, the cases, wet or dry, bare been handled in lead ducts and equipment fabricated fra* sheet lead for aUoet 17 yesre with no a.preeleble corrosion, Thle also applies to the esrresit* circultnt of analysis given4bo*e In d. A newly const rusted scrub tower, built in 1937, with #d*<fu*to brick lining over the lead to handle the high tasp*relure Involved is expected to Ust indefinitely* LIA09843 SKa*''"' T "r"'~ r'T7" I* W ', %& bet SW* C (S& F.) e ORtBP, * CSS* iHB Ubv* IS ti**U 2. %r ths tot pse* PM* eoscterrrrront t* tUa cealmt Up *t short ?3> F tlr?w i''.:s?3o ef trlcl; tsssi ewr tto 1W&, 5ssat Urs fcttte. tod * tt&su esses# eS ^ tekdt la ss4 war the 14,-Oa, Isxd fcLdiw* V- 3, XB tto psifea# tSaafee? eat esS&e? ls4 &?** f --: fcrlclc la ssd e?ar to&d* la {Is %C3*4!%t aettlsr tea tto lft2&a Saad ISaSsg e tto Jfr. elel$% r-15-- it s^l rtrc;$?s4* - E<k 3Ss b' ettoiaS*?saaitsl fei&aws te-jaso tto ra&Lsj, ge^s ts iiie ez es& strap la breissa e? a 4a gsp at intervals e J ft* SUsta bald tasks, l**d Un*i, tove fcsld s? U over tto IT year parted of pleat cjwrctiea ff fcr.ve otter lead ltesa ecat u filter prsoee*, Ccsst Ircd vsjwretora are czocHtat in service tot tto 5?0-ia. tutoi c? 1-1/1*in cstrici dlaaetor era a aearos ef triable. tee-cc,'i> tutoa fall fra* extensive pitting and are sore costly than tto carbon tetoa taieh fccsrsvsr fcrss-k eerily. A re'stor Head crystalliter haa givsa exponent asreloe ec&tottlag the atoadca Area agitated dne fulfils crystala. -< Ixcollant service free load lined aqulpoest is often the result ef proper 1 car* in laetallstlcn, Kero, wooden fora* curved to fit the tank* are used to press the shoot load finsljr to tto carefully saoothod tank surface. Vfesa a lining of brick ii installed, aaple ceaeet la daubed owr tto brick wrfsoe that will sake tto brick to lead contact. `i /'i -i t- i 1 3 ****r~ \: I. LI A09845 SPS$ L: j i: LI AO 98 46