Document XKjdw42vkG1x2jrEeVkd418J

FILE NAME: Concrete (CONC) DATE: 1947 Aug DOC#: CONC016 DOCUMENT DESCRIPTION: Journal Article - Recovering ASBESTOS Floats with Dust Collectors We Hear A New Age of Long Rotary Kilns . . Bror Nordberg Rodens Notes-Woes From Unstable Dollars Labor Rela_t-.iLon Trends V NVath, an C. Roekwood This Personal Side of the News Industry News Hints and New Machinery Recovering Asbestos Floats w ith bust Cto. lJle, cWtoierssihhaus 104 Processing Aggregates for Big Dam aCgugmrebgeartleasndfoQr uWarorilefs. reIneck., doapiteiraidteKs etwntoucpklyants to prep-are David Marine. 10$ Supplying Ready Mix and Concrete BlockW.MB.aLrkenehtart 111 Potash Concentration Cement Section -- Jam es A. Barr, Jr, 112 Trends In Cement Manufacture Bror Nordberg 116 Long Kiln vs Short Kiln Performance 122 Barge Haulage and New Terminals Extend Cement Markets 126 Mathematical Problems of Proportioning .Raw M aterials Ralph W. Hubbs 132 High Efficiency in Stack Dust Recovery Bror Nordberg 134 From Aluminum to Cement Manufacture 138 Double Capacity of Sweden's Most Modern Cement Plant 142 Insulation in Rotary Kilns w. r. ante 145 Specific Heat Performance Data for Evaluation of LimeJ, KAi.lnMurray 143 Next Developments in Cement, Lime and Concrete 154 Blo' ck Business Booming in the Pacific NorWth. wB.elesathart 1 9 3 Methods and Machines Which Have Cut Larg Pipe Costs Steam Plus Hot Air for Preshrinking 198 Labor Requirements Data for Concrete Pipe A llred W . Collier and Clyde Stone 200 brand Opera Sells Ready Mixed Concrete W. B. Lenhart 2 0 2 Building Houses Using Large Precast Sections 206 H. M. Goodenow, Dir. of Circulation MC.. PA.. TCeootlste,r,FiCelidrcuRlaetpiorenseSnetarvtiivcee TMhioltronnellMB. aMrnyeesr,sD, iArercttoDr iorefcRtoersearch l f C. M. Hancock, Production Manager District Offices Eagaestre;rnJoAhnreaF--. LEo. cHki.ttS, tA. sJsuiisetsa,ntM, a52n2 rFaiyfthHAillve2-,7N88e8w. York 18, Tel. Mur Cageenrt,ralHAanrenaa-- BF.ldgS.., RCulgegvieelsa,ndMa1n5, f Tel. Main 4362. [- Magiedrw, e3s0t9AWre.a--JacMk.soBn. BNIvycluf.,ndC,hMicaagno- t 6, Tel. Harrison 7890. aWgeesr,ter3n09AWreeas--t LJa. ckCs.onThBaolvnd,.,MCahni-- j| cago 6, Tel. Harrison 7890. : PMaiclilfsic BAldrega..--SDaunncFarnanScicsoctot &4. Cleot.., |t 4G0a8rfiePlders1h-i7n9g50 SIqnuaLroes BAlndgge.,les T1e3l., j; .Michigan t>203. LMoanndaogni,nEgngDlainrde--ctoEr,rneMstacRle.aGn-aHulueny-, Tterra, fLaltgda.,r SSuqnuaLrief,e LofonCdaonna,daS.BWld.gI--, I BOCK PRO DU CTS is published monthly by M A C LEA N -H U N TER Publishing Corporation, XW West Jackson Blvd., Chicago 6 , tHinws worate Hunter, President; John R Thompson. Vice P?es ' dent; J . L F razie r, Secretary. Copyright, Entered as second-class matter, Jan. 3 . * the Chicago, HI. post office under the act 0 3 , 1679. Additional entry at Milwaukee, w is. SU BSCRIPTIO N INFORMATION Subscription P rice : United States Canada, one year, $2 0 0 ; two years, years, $4 .0 0 . Pan American, one year, $ 4 .U v, years, $ 7 .0 0 ; three years, $ 1 0.00. A ll rtM r OT eign, one year, $6 0 0 ; two years, 51Z-UU, ,32 years, $1 5.00. Twenty-five cents for single COpio. Indexed in the Industrial A rts Index. Canadian subscriptions aannd remmiititwancwes bep sengt in Canadian funds to ROCK PRODUCTS, Box 100, Terminal "A " Toronto, Canada. To Subscribers-- Date on wrapper indicates j#** with which your subscription expires.. to have address changed, give old as well address. Mimmi C o lle c t io n - : - Recovering A S B E S T O S Floats w ith D ust C o lle cto rs ;i' -ii srieo-ti A1 , i,., . ' ; fceen DUaSsTbcelsotuodsshcarveeatelodngin dtehieiedmielflifnicgienotf and economical collection and it is By L. J. W IESCHHAUS adsubsetstsohsedmsiellrsveiss ttwheo mduasint sphuerd^stofT (1) it serves as a settling chamber^ ajuficdcet illec obenelyn rseuccecnetslsyfultlhyatsotlhviesd.prBoebcleamusehaosf the vast quantities of asbestos lost in tahbeledluasytetro o"ncaakney" ifniltaersomliedd, iiummp.erme 4. Low apparent specific gravity. ftrhoamt athelarcgyeclopnoerstiocnanofsetthtlee out b gravity before it is discharged into th airlieeni ipires hthigehfomrmarkoeft vdaulsute aonfdthbeesceau"sfeloaotfs"thaet the present time, it may be well to 2A.5lt4hotoug2h.59i,tsfinreelayl disvpiedceidficasgbreasvtoistyhaiss an apparent specific gravity of only odpisecnhaargire apnodint(2)to bay rreemmoovteingpotihnet from the mill proper, it seeks to as |-gicou Eppffoapi icnontshiedercoslolemcteioonf otfheasfbaecstotorss. involved The physical properties of asbestos, faibborouut s,1/f4lufofry 1n/a5tuorfe tohfatthfeigumrea.teTrihael is a serious handicap in any settling sriuerde tahwaat ymobsyt othfethewidnudstrwatihllebretchaarn being returned to the working area li efldoafts Ir Fr. awhciolemnbointautinoinquoef ipnrdoivbliedmuasllyw,hpicrhesearnet a tax un the ingenuity of the dust col opTerhaetsioensa.re the principal physical characteristics which are important mOnetehoodbvisiouthsatdiitsapdervmaintstavgaest qofuatnhtiis ties of dust of low particle size to float U isccarlibci r consi' leerctiteosr aenreg:ineei. A few of these prop rfeocrovceornysiidnertihnigs itnhdeusptrroyb. lem of dust ovAerntohtehesrurmroeuthnoddinogf adruesat. prevention i: idniedtei Be ;v; iI tic3.ofFaibfriobures insatthuraet. itThheascahatreancdteenrcisy to interlace and form a mat which In theTmypilelisngofofCaoslbleecsttoosrsthe prin ewshsiicnhg. haTshibseemn ettrhioedd idsoe"sweste"rvperotco eliminate a great deal of the dust nor ; opfarStii - offer t; - .> ma2k.eFs rpianbeiulimtya.ticAshbaensdtolisnghadsiftfhiceulat.bil ity of bieaking down successively into icnipga, l ssiozuinrcgesaonfd dugsrtadairneginotpheeractriuosnhs. All of these are controlled by prelim mtioanll,y haotwteenvdear,ntitonreassublteesdtosinpraelpmaorast insurmountable pioduction difficulties. iwoitthh tant smmaatellleyr carneadtinsmg aalledrusftiborfess,ucthhums inuulttie particle size that it becomes suspect isnuacrcyesscycwloitnhe wtyhpiechcotlhleectodrusstanids trhee moved from the source depends pri Tprhoebletimmse erneqcouuirnetdereadndinthedryhianngdlitnheg material at the proper temperature ! doBaei : with 5 oaf sbuecicnegsshfualzacrdoolluecs.torThmisusmt eahnasvethaant extremely high degree of efficiency for marararinlygemupeonnt. tUhenfdoertsuignnateolfy,thteheholoowd velocity cyclone type collectors gener cmeardtaeintheamporoucnetssofimhparnadctliincagl. wAalssor,ea quired after the material had been iatnids so tb mpairctriocnles.s of a size smaller than 10 3. Effect of Moisture. As the par arellsypecutsetdo saertetlinogfteonutinthefeficfiinenetr swiziethd particles, and it is in the collection of pdrroievdideansdomite wsoarst sotfilldunsetcecsoslalercytioton methods for the dust created in this "TUhleti medi itnicglleysaizfefecdteecdrebaysems oiitstbuerceomwehsicihn,cwrehaesn present in excessive amounts, causes dcluosntesfrothmat ththeedrisecahl arpgroebloefmthoefseducyst control arises in the asbestos industry. opAernaotitohne.r type of collector which has been used in this industry and which tThheis reve abr'aMtoarrke&t ERqeuseiparmcehnEt nCgoinrpe.er, A m erican W hed- whOicnhe hasescboenednaruysedfoirnm proacf ticcaollllyectaolrl thhaes emleetc twr oiths tacot incsidteyrpaebleofsucocclleescstoirs. edyoetki Etwleocstreorisotautsicdrcaowllbecatcokrss:, hFoiwrsetv, ethr,ehcaovset asbCei othfethdeeogrriegeinoafl ienfsfticailelantciyondeVsairrieeds, wainthd eaki Bi tfhiceienreclyatiios ntshhaipt boeftwaneenaccuotesltyanrdisienfg flouwi . cSuercvoen,d,raftohrermtahxaimn uma setfrfaiciigehncty,linaen. binespt efolerctorpoesrtaattiiocncoaltlecatofar imrluystdbefeindietseigdnuesdt witill! cooffncwehnetnratiitonis aunsdeditast eafnfiycieontchyerdrcoopns ethleuai tcheinstrtaytpioen.toIntheadaaspbteinstgosaincdoullsetcrtioers oitf tinhat( tmiounstanbde hdeensicgenecdannfoort mbeedeixapnecotepdertao operate at its maximum efficiency at bthaeg aglrleatitmvesa.riaTthioenreiansondufsot r lothaids iwshtihche results from variations in rock, rock Fili A tem perature, mill temperature, mois ture conditions, etc. otofs ; Co., tioEnsv,enandu nedseprectihaellymsoostu niddeear l thceonodpi erating conditions which prevail in whi in ttahien aasmbeosutonst ionfduefsftlruye,ntthferoremiselaecctreor moi wa1i lsetacttoicr mcoalylecbteor9s8. oErve9n9 ptheor ucgehnttohveecraolll a si F9 - 1; P o rtio l view of th e c o lle c to r in sta lle d a t the John so n's C o m ill in T h e tto rd M in e s, Q ueb ec. Four of th e six collectors are visible- Inspection window m ay be seen to the right efficient, the effluent is visible, which 104 HOCK PRODUCTS. Auausi iqd.7 5 aofsovceiorylogsimcaallldipsaadiUvacnletageiz,e.anTdhiist tt5irnpcet oafdvcaonltlaegcteor odvoeers mhoasvte ottwheor dcoisl lreecqtuorirsemir>enthtsatanidt hvaesryvleorwy lhoawckppowreesr surAe.nother type of collector which ha apneedn wthriiechd hinas thmeet awsbiethstocsonisniddeursatbryle, csoucllceecstso,rsi,s wthheenfiultseinrg-tyopred.inFairlyterclotythpse. ant,ieonast wa hdeirseadevxatnretamgeelyinhicgehrtateinmopperear etunrceosunotrerehdighor minoicstoullreectcinogntemnatsterairael opfropaervlyiscaopupslienda,ttuhreey, ahroewiedveearl,lywshueitn ed for a material such as asbestos floFatrso.m a consideration of the phys isccarlibcehdaraabcotevrei,stiicts wofillasbbeestsoese,nasthdaet cinondseisdiegrnaibnleg acnayretympeusotf fbielteerxteorchisaend dleBtehciasusmeaotefrtihael. fibrous nature of the pofarstiucclhes,athmeatfeilrtiearl manadterwiaelavme uasst btoe otoffethrethfeibrleeasttopionstseirbllaeceenacnoduriangteermloecnkt wtaintht itfhethfeabsrhica.kiTnghismieschvaenriysmimispotro doBaneceafufsiceieonft tjhoeb forfiacbleilaintyinogfthasebbeastgoss. witiitsh iimtsporertsaunlttatnhtatsmthaellclpeaarntiicnlge csyiczlee, asondthcaltetahneiyngleamveechaacneisrmtainbeamdeosuingtneodf "Tfhielte"rficltaekrec"akine"thise thbeagasctautalalflilttiemriensg. mtheedifuinme apnadrtiisclaebssoalrueteltyo nbeecesstsoaprpyedif. Trehvies,rsiencaidirenftlaolwly,dpurroinhgibitthsethceleuasneinogf ccyloctlhe tsoinocceletahnis. practice gets the filterasbCeasrteosmruesatsobenaebxleyrcidsreyd ttoo kpeerepvethnet cakBiangg pinropthoerticoonllsecmtours.t be given careflonwl caopnpsaidreernattiosnpecbieficcaugseraovfitytheofvearsy mbesptorso.poIfrtitohne tboatghelednigatmh eitsert,oothegrbeaagt Isfosrhmakean,tragprepaintlgy shtarumcptuerriengwhtehne cthleuamnbingdeovpeelroapteiodn.duArinugsefuthle ruyleeaorsf t|ohaotpmereattailolnurgisy tbhaagt htohueselsenhgatvhe boefena tbtalegdshiaamllenteort. be greater than 30 times filter Type Operates Successfully A3nfieltxearmtypplee ocof lltehcetorsuicncethssefualsbuesse,97wLdutds.t,ryTibs eptfroesrdenteMdinbeys.JoQhnuseobnec's, in 1oCp^er^a8tiSon now?ufcobr amnorienstthaallnatisoinx months. first step in this installation a ,SaiaH, 5P0u00rcch.af.sme .bcyolJloechtnosrotno'sbeCou.seodf (C o n tin u e d *>n 1 Fig. 2 E le c tn c o l co ntrol p a n el. Ind ivid u a l m anom eters are supplied for eoch collector unit to p ro vide check on com pleteness with w hich collectors ore shut o ff during sh aking operation. To the extrem e rig h t is e le c tric a l tim er controlling sh a kin g cycle Fig . 3 : In le t d u ct w hich corries dust lad en oir into collector hoppers Fig. 4 : Underside of cell plate. Note that none of the tubes ore bridged over in spite of the "dinging" nature of the osbestos fibers For detailed inform ation on Cleveland Screen Section Assem blies write today for B U L L E T IN N o. $. THE C L E V E L A N D WIRE CLOTH & MEG. CO. 3574 C. J8 STBEET i CLEVELAND 5.0HI0 SAUERMAN MACHINES dig, haul and dump for few cents a yard! SAUERMAN SLA CKU N E CABLEW AY Digging g rovel from sHore of loke. SAUERMAN POWER SCRAPER Storing ond silica at re c lo im d ry in g fnplgonTcr.ushed G e t the S au erm a n C a ta lo g ond see fo r yo u rs e lf horv others ho ve cut costs on o il k in d s o f d ig -and - haul w o rk disWtahnecrees molatseerviaelrsalahreuntodrbede mfeeotveodr mororCe,abalewSAayUEcRaMn AcNut Dthraeg cSosctrapperr cthuebiccoymaprdletteo maolvoewmefnigturoef mbeactaeurisael itos ahapnldalnetdorbyto aansdinfgrloemmaascthoicnkep. ilAe raaspsuidr,edstweaitdhy mfilnoiwmumof umseatoefrialalboisr and moderate expenditure of power. MaTchheinefirisst rceoasstonoafblea, mSAaUinEteRnManAcNe apmlicoiutyntosf toopevreartyionlitmtlea,keasndit tphoesssibimle teostpliancsetaltlhaetiocnonitnrolthoef ehvaenndsthoef laornge voepreyratfoler.xibMleoraenodveri,s tehaesimlyacahdianpeteids to changes in ground conditions. c a i i f r m a k i r p o c ih ir Asbestos Dust I Continued from pose atosr awn aesxptaeprpimedenitnatloutnhiet dTuhsits I w,, taensdts sbuybjtehcetecdomtpoanay'sseernigeisneoefrs* ^ 5 p1--urpthoese oopftitmheumtestasirw-calos ttho draettieor-irniiTS' 3th--e thceleabnalciknespsreossfutrhees rdeissuchltainrggefST tvhaerioefufsecotipveernaetsinsgopf rtohceedsuhraeksi;nganmde4et_*_ aambosumt .wThhicehfothuertghrepaotienstt wdoasubttheexoisnte eOdnansdevietrarelceoicvceadsitohnesmaossbtersitgoisd ftleosatsts. lwecertoer aucnttuilaltlhye sbhaogvselwedereintsotuftfheed acnold tThheecboallcekctporretshseunreshreutturonffedantdo snhoarkmenal almTohestseimtmesetdsiastheloyw. ed that the filter wpeorulsdquhaarnedlfeooatn oafirclfolothw aonfd4, twi ieth.f.man. mopienruatteisn,gthaendbacckleparneisnsgurceyvclaerieodf b4e0 dtwisecehnarg12edanadir 1xw/2asinw. eolfl wwaittherin. Tthhee sthtaannda10rdmhileliaolnth praerqtiucilreesmsemnatslleorfthleasns 10Omn itchreonbsasiins oofnethecsuebitcesftosoat 4o0-f0,0a0ir0. est.fa.lmle.d utnoit hawnadsle ptuhrechcaosemdpleatnedduinst loaTdhefroemntitrheis imnsitlal.llation was made wreigthulparracotpicearlaltyionno ionftetrhreupmtioilnl. inItthies ehsotuimrsateodf tohpaetraatipnpgrotximime awteelrye tlwosot swwhietnchetdheintdoustthecoslylsetcetmor. was being strFuicgtiso.n 1 atnhdrouogphera4tinsghofweattuhreescoonf tahebcaoglletcytpoer acsoliltecistoirnswtailtlhed.baTghsis oisf dsaiatemenetewr eaanvde 1c7otftto. n6 finab. rliocn,g.8Sipnr.inmg bstaegesl binandalsumhoinldumthecelbl opttloamtesofwhtfhlee tfhroemtopthse ofshtahkeinbgagms eacrheansisumsp.enTdehde tsohrakdinrigvemn ecehccaennistmric cwonhsiicshts torafnasmMitos baaghso. rizTohnetalressuhlatikningg baacgtiomnottioonthies sruimg iliasr tsohatkheant obbytaihnaendd.whTehne aspsmrinalgl csetellel plcaltaemppienrgm itasrraeansgyembeangt reaptlatchee mpleancet. aObneagmoafnthciasntyrpeemoinveleasnsdthraen oneThmerineutaer.e six collecting units ar raalwngaeyds iinn soupcehrataionwawy htihleatthfeivesixatrhe iiss cboenitnrgollceldeaanuetdo.mTathiecalcllyeabnyinagn ceyleclce 2tr,icantdimiitngo-pemreactehsanoinsma pshreodwenterinmiFniegdteilmecetriccyacllec.onAtrtol tmheechparonipsemr ctaimuseesthane electro-pneumatic valve to close the dj,eu]sotwN. dFrroopmpedthdeorewnitinitso cthaerriheodppbeyr m0feathnes ohfopapescrrewwhecroen'ivteydoror ptso tohnroeuegn-hd bneclohwu.teAtodraagc-onchvaeiynorinbotxhiisn ctohnevfelyooorr dcoulcltecctoarrsrietos athecefnltoraatls pfrooinmt oafll dsiisx cfohrarsgheipwmheenrte. it is graded and bagged enOconulynteornedce ihnasthaenymdaiifnftiecnulatnycebeeonf pwrhoepneranbacekxcepprteisosnuarlely. ' Twheist boactccuhrreodf mroockistuwreascobneteinngt opf rtohceesdseudst wanads stuhfe fciackieenttotobucialudseupaninatlhmeosbtagims.peTrhmiseawbales cshorurtetcintegd obffy tthhee wsiemt prloeckexapneddiecnitrcouf luanttiinlgthderypredsussut rethrreotuugrhnedtheto cnoollremctaolr. wiTthhisthies annece"saslalryprepsrseusrseu'r'e sybseteinmg stourpspluiesdedthinrouthgeh gtrhaedicnygclopnroecessesp.aNrao swuhpepnlethmeendtuarsyt cfoalnlesctworerweasreaqddueidretdo qthueiresdystteomo. vTerhceomadedtihtieonraelsipsotawnecre roef tIhmeprsoyvsetdemtywpaes pofrovfiadned wbhyeeulsinwghicahn Ijfnfcicreieansceyd tothseucfhana dpeegrfroeermtahnactenoatnda ;sointagllefahnorlsoeapdo. wer was added to the erNedo sseinricoeusthteroiunbsltealhlaatsiobneewn eennteoiunntosnpgeroatpioenrataeldthoaut gah 1it0 ispecrurcreennttlyovbeer-iofadm. aArkpeptraobxleimaastebleysto2s2 tiosnbseipnegr cdoalyetncdtedb.agTgheids macactoerrdiainlg istoaliltsremgraardkeedt lassifieation. dement Production uBctuiorneauofoffinMisihneeds rpeoprotlratns dthcaetmperon-t 'ublr.inogr A15prpile,r 1c9e4n7t, gtorteaalteedr 1th4,a5n66t,0h0a0t empeontrsterdeacfoherd A1p5r,4il1,4,0109046b. blM.,ilal fisghuirpe sf>steAntpiarilllyofthtehesapmreeviaosusthyaetarr.epSotorctekds f0.fi1n9i4s7h,edweproert2la1n,3d30c,0em00enbtblo.,n aAn pirnil cnatesde ofof r 34Appreilr. c1e9n4t6.ovDeermtahnadt froer wWieerntinwansinhe,igthhearninth1a0t diinstrAicptsrilanodf netiyoenar.ofThfeinilsohnegd-teprmorttlraenndd cinemperon-t m**tlfnirusets fouuprwamrdo,ntihnscroefas1in9g47 dautrinang renrtahg.e rate of 2,989,000 bbl. per NTahtieonfoolflopwroindguctsitoantetmoecnatpagciivteys, atnhde ieciot.vmaptartehde cwloitshe othf eApesritli,m1a9te47d acnadPril> 1946. RATIO (PER CENT) OF PRODUCTION TAOprC.APAApCr.ITYMar. Feb. Jan. e Tftonth 1947 1946 1947 1947 1947 74.0 64.0 60.0 68.0 66.0 Oilthq 73.0 50.0 72.0 71 0 70.0 "POWER KING" TRANSMISSION BELTING . . . made of pre-war quality natural rubber to give it the extra strength, grip and long life that guarantees steady power to your primary or intermediate crushers. Friction surface, raw edge construction, espe cially designed for m inim um stretch and firm contact with pulleys at high speeds. Plies of specially built duck provide exceptional longi tudinal strength. High quality friction between plies contains rich skims of rubber to assure maximum flexibility and to elim inate all risk of "bootlegging". Edges treated to keep out moisture. Available from stock in all widths to 48", in 33- and 35-ounee duck. Can be made endless if desired. Contact Our Nearest Branch for Prices GOOPALL RUBBER CO.,INC. THE GOODALL-WHITEHEAD COMPANIES Philadelphia Trenton New York Boston Pittsburgh Chicago St. Paul Los Angeles San Francisco Seattle * Salt Lake City Houston Factory: Trenton, N. J. Est. 1870 LONGER PROD FARREL-BA< CRUSHERS cPieenrmcyanisenent gsitnreeenrgedthinatnodtohepseeracrtuinshgeersffait einvderuystvriitaallupnoiitnsto. rFcaorrmelp-lBeatecloyndwesililgnperodvaindde etoqrusipapnedd cpolannvtesy,oirnsc. luAdlisnog ostchreerentsy,peelsevoaf cmhiinnee,ryq.uaWrrryit,esafonrd caonmdpglertaeveilnfoprlamnattimona. ROCK PRODUCTS, August, 1947 17?