Thaum koj hnov ​​galvanized flange, feem ntau cov neeg tam sim ntawd xav txog kev tiv thaiv corrosion, tej zaum tus nqi. Lub kaum sab xis ib puag ncig? Feem ntau ib qho kev xav tom qab, lossis phem dua, nkag siab yuam kev. Kuv tau pom cov khw muag khoom siv tshuaj tua hluav taws xob tso dej tso dej tsuas yog lwm txoj kab dej, thiab qhov ntawd yog qhov tseeb zaj dab neeg - thiab qhov teeb meem tiag tiag - pib. Nws tsis yog hais txog zinc.

Qhov teeb meem tseem ceeb tsis yog hlau xwb

Cia peb paub meej: thawj qhov chaw ib puag ncig los ntawm electroplating galvanized flanges tsis yog cov zinc txheej nws tus kheej. Zinc yog qhov zoo tib yam piv rau lwm cov hlau plating xws li cadmium lossis hexavalent chromium. Qhov cuam tshuam yog nyob rau hauv tus txheej txheem. Cov theem ua ntej-kev kho cov kua qaub rau kev tshem tawm xeb, alkaline tu rau roj-tsim thawj nthwv dej ntawm cov pov tseg. Koj tab tom cuam tshuam nrog siv cov kua qaub da dej hnyav nrog hlau chlorides thiab sulfates, thiab alkali da dej loaded nrog roj thiab surfactants. Yog tias qhov ntawd mus rau qhov dej tsis kho, koj tab tom saib kev cuam tshuam pH hnyav thiab oxygen depletion hauv dej. Kuv nco qab txog lub khw me me nyob ze ntawm qhov chaw ua lag luam tau raug nplua tsis yog zinc, tab sis rau pH meter nyeem tawm ntawm cov kab kos los ntawm lawv cov pob pov tseg tank.

Ces los plating da dej. Thaum alkaline tsis-cyanide zinc plating tam sim no tus qauv (cyanide da dej yog npau suav phem ntawm yav dhau los, ua tsaug), da dej tseem degrades. Brighteners, complexing agents, thiab wetting agents tawg, tsim cov organic tebchaw uas xav tau kev kho mob. Lub luag-tawm-uas nyias zaj duab xis ntawm kev daws clinging rau flange thaum nws racked tawm-yog ib tug uas ntsiag to culprit. Nws drips, kis kab mob hauv pem teb. Peb tau xav tias ib qho yooj yim drip tais yog txaus kom txog rau thaum ib tug thib peb-tog ntsuam xyuas taw qhia txog kev sib kis kab mob nrog coolant los ntawm lub machining cheeb tsam. Nws yog ib qho mess.

Cov txheej txheem rinsing yog qhov tseem ceeb. Kev ywg dej tam sim no txuag dej, tab sis yog tias tus nqi ntws tsis raug ntsuas, koj tsuas yog txav cov kab mob ntawm ib lub tank mus rau lwm qhov. Qhov yuam kev loj tshaj plaws uas kuv tau pom? Piv txwv tias cov dej ntshiab huv txhais tau hais tias dej huv. Dissolved solids thiab complexed metals yog tsis pom. Kuv tau sim cov dej ntshiab uas tseem tuav 20-30 ppm ntawm zinc, zoo tshaj qhov tso tawm. Qhov ntawd yog hom kev nthuav dav uas koj tsuas yog ntes nrog qhov tsis tu ncua, kev tshuaj xyuas kom raug, tsis yog kev kuaj pom.

Cov kwj deg thiab cov nqi zais

Sludge. Qhov ntawd yog qhov khoom kawg uas tsis muaj qhov kawg. Thaum koj neutralize dej khib nyiab, yaj zinc precipitates li hydroxide sludge. Nws raug cais raws li cov pov tseg txaus ntshai hauv ntau thaj tsam vim nws cov ntsiab lus hlau thiab lub peev xwm rau leaching. Tus nqi tsis yog nyob rau hauv nws tiam; Nws yog nyob rau hauv kev tuav, cov ntaub ntawv (manifest tracking), thiab cov nqi pov tseg. Ib qho kev lag luam nruab nrab plating flanges rau kev siv cov qauv tuaj yeem tsim ntau tons ntawm cov sludge no ib xyoos. Cov nqi pov tseg tau nce siab. Kuv nco qab txog ib qhov project uas tus nqi pov tseg rau sludge pib sib tw cov nqi raw khoom rau zinc anodes. Qhov ntawd yog ib qho kev hu xov tooj los saib kev rov qab los.

Kev siv dej yog lwm qhov cuam tshuam zais. Electroplating yog nqhis dej. Rau ib txoj kab racking, cov dej ntws yaug tuaj yeem ua tau ntau yam. Hauv cov cheeb tsam uas muaj dej tsis txaus lossis cov nqi se siab, qhov no dhau los ua tus nqi khiav lag luam ncaj qha thiab qhov teeb meem sustainability. Peb tau ua haujlwm nrog lub chaw, tsis zoo li qhov koj yuav pom ntawm lub hauv paus loj xws li HANDAN ZITAI FREWER RAUG UA MOV., Ltd. nyob rau hauv Yongnian, qhov uas cov tub ceev xwm hauv zos tau pib nruj cov ntawv tso cai rho tawm dej hauv av. Lawv yuav tsum tau nqis peev rau hauv lub voj kaw kaw nrog kev sib pauv ion, uas muaj lub siab capex tab sis txiav lawv cov pleev dej ntau dua 70%. Nws them tawm hauv qis dua ob xyoos.

Lub zog yog qhov sib tham tsawg dua. Tank cua sov, rectifiers rau DC lub zog, qhov cua rau huab cua tswj-nws tag nrho ntxiv. Cov pa roj carbon hneev taw txuas rov qab rau hauv daim phiaj xwm hauv zos lub zog sib xyaw. Hauv ib cheeb tsam uas siv hluav taws xob ntau los ntawm cov thee, qhov cuam tshuam ib puag ncig ntawm plating lub thawv ntawm flanges tuaj yeem yog qhov tseem ceeb. Nws yog qhov sib txawv ntawm kev xav hauv lub neej: peb tsom mus rau chav da dej chemistry tab sis feem ntau tsis quav ntsej txog cov hluav taws xob hluav taws xob tso tawm tom qab hluav taws xob khiav kab.

On-Site Realities and Practice Failures

Hauv kev xav, kev kho mob yog cov lus teb. Hauv kev xyaum, lawv feem ntau tsis muaj kev tswj xyuas lossis nkag siab yuam kev. Ib qho kev pom zoo hauv cov nroj tsuag laus: tus neeg ua haujlwm kho dej khib nyiab kuj yog tus tsav tsheb forklift. Lawv muab pov tseg pH hloov kho raws li kev sim nrawm nrawm, ua rau cov tsiaj qus viav vias uas ua rau cov txheej txheem nag lossis daus. Qhov tshwm sim? Zinc plam los ntawm kev qhia meej, lossis tsim cov sludge uas yuav tsis lim kom zoo. Kuv tau pom cov ntxaij lim dej txhaws nrog cov gelatinous mess vim tias pH tsis raug thaum nag lossis daus, khi tag nrho cov txheej txheem pov tseg rau hnub.

Tom qab ntawd muaj kev ntxias kom txiav cov ces kaum. Evaporation nyob rau hauv qhib tso tsheb hlau luam kom txo cov dej khib nyiab suab zoo li lub tswv yim pheej yig. Nws yog, kom txog rau thaum koj paub tias nws tsuas yog tsom rau cov kab mob sib kis thiab tso txhua yam tsis zoo rau hauv huab cua ncig lub khw. Tsis yog ib qho kev daws teeb meem zoo. Lwm qhov kev sim ua tsis tiav kuv tau ua pov thawj koom nrog siv cov khawv koob polymer kom coagulate txhua yam. Nws ua haujlwm zoo heev, ntxiab dej ntau heev uas cov sludge ntim tau nce 40%, rhuav tshem lub hom phiaj. Tsis muaj kev kho universal; nws yuav tsum tau ua kom haum rau qhov tshwj xeeb da dej chemistry thiab yaug teeb.

Cov khoom siv los ntxiv lwm txheej. Qhov twg zinc anode tuaj ntawm? Puas yog nws los ntawm thawj smelting los yog siv dua? Cov mining thiab smelting hneev taw ntawm nkauj xwb zinc yog colossal. Siv cov khoom siv thib ob, rov siv cov zinc anodes tuaj yeem txo qis cov dej ntws ib puag ncig. Nws yog qhov kev txiav txim siab yuav khoom uas ntau lub khw plating tsis tswj, tab sis cov tuam txhab loj dua cov khoom siv plated, zoo li lub tuam txhab fastener tswj hwm nws cov saw hlau, muaj peev xwm thiab yuav tsum xav txog. Lub website rau Zitai Fasteners (https://www.zitaifasteners.com) qhia txog lawv qhov chaw nyob hauv Suav teb tus qauv loj tshaj plaws; xws li cov neeg tsim khoom loj muaj peev xwm thov cov khoom siv huv huv los ntawm lawv cov neeg muag khoom plating, thawb tag nrho cov saw hlau mus rau kev coj ua zoo dua.

Cov kev cai thiab lub hom phiaj txav

Kev ua raws cai tsis zoo li qub. Hauv EU, REACH thiab ELV cov lus qhia tsis tu ncua kev tsim cov txheej txheem, tsom rau cov ci ci tshwj xeeb lossis cov khoom ntxiv. Hauv Teb Chaws Asmeskas, POTW hauv zos (Publicly Owned Treatment Works) txwv yuav nruj dua li tsoom fwv EPA cov lus qhia. Kuv tau muaj ib tus neeg siv khoom uas tau ua raws li ntau xyoo, tom qab ntawd txoj cai tshiab hauv zos tau txo cov zinc tso cai los ntawm ib nrab. Lawv yuav tsum tau rov kho lawv cov nroj tsuag kho mob tag nrho. Qhov takeaway? Koj tsis tuaj yeem nruab ib qhov system thiab tsis nco qab nws. Koj yuav tsum tau saib xyuas cov kev cai sib txawv. Kev cuam tshuam ib puag ncig yog ntau npaum li kev pheej hmoo raug cai raws li nws yog hais txog ecology.

Kev tshaj tawm thiab kev pom pom tau dhau los ua ib feem ntawm qhov cuam tshuam. Cov neeg koom nrog, los ntawm cov neeg siv khoom mus rau cov zej zog, xav paub. Kuv tau pom ntau dua RFQs (Thov Kom Hais) rau cov khoom siv flange uas suav nrog ntu ntawm kev tswj hwm ib puag ncig thiab pov thawj pov tseg pov tseg. Nws tab tom hloov los ntawm qhov teeb meem kev ua raws li lub chaw ua haujlwm rov qab mus rau qhov tsim nyog muag khoom tom ntej. Tus neeg tsim khoom muaj peev xwm qhia tau tias lawv tswj hwm li cas kev cuam tshuam ib puag ncig ntawm cov txheej txheem zoo li electroplating yog dhau los ua kev lag luam sib txawv.

Qhov no ua rau lub tswv yim ntawm kev hloov lub nra. Los ntawm kev ua lub flange ntau dua corrosion-resistant los ntawm galvanizing, koj tuaj yeem txuas nws lub neej kev pab cuam, txo qhov zaus ntawm kev hloov thiab cuam tshuam kev tsim khoom. Qhov ntawd yog qhov zoo ntawm lub neej kev sib pauv hloov pauv. Tab sis yog tias cov txheej txheem plating nws tus kheej yog qias neeg, tej zaum koj yuav tsim teeb meem loj dua los daws qhov me me tom qab. Qhov sib npaug yog qhov muag heev thiab xav tau kev ncaj ncees, kev ntsuam xyuas tag nrho, tsis yog kev tsom mus rau qhov kev cob qhia tam sim ntawd.

Mus Rau Kev Txom Nyem: Tsis muaj cov mos txwv nyiaj, tsuas yog ua haujlwm nyuaj

Yog li, dab tsi ua haujlwm? Ua ntej, qhov txo qis. Kev ua kom zoo ntawm cov tshuaj da dej kom ua kom lub neej ntev, txhim kho racking kom txo qis qis, thiab txhim kho cov tshuaj tsuag los yog cov riam cua ua ntej lub tank tuaj yeem txiav cov kab mob ntawm qhov chaw los ntawm 30% lossis ntau dua. Nws yog unglamorous engineering, tab sis nws yog qhov ua tau zoo tshaj plaws.

Qhov thib ob, rov qab los. Kev sib pauv ion, evaporative rov qab, los yog cov txheej txheem membrane tuaj yeem rub zinc thiab dej rov qab rau hauv cov txheej txheem. Kev lag luam tam sim no muaj txiaj ntsig zoo hauv ntau qhov xwm txheej. Tus yuam sij yog tsim qhov rov qab los rau koj cov dej khib nyiab tshwj xeeb. Ib qho system tsim los rau da dej uas muaj cov tshuaj chloride yuav ua tsis tiav ntawm lub da dej sulfate.

Thaum kawg, kho qhov kawg ntawm cov yeeb nkab, qhov loj me kom raug thiab ua haujlwm los ntawm cov neeg ua haujlwm raug cob qhia. Qhov no yog kev ruaj ntseg net. Kev koom tes nrog tus neeg tuav pov hwm lub npe pov tseg yog tsis sib tham. Lub hom phiaj yuav tsum yog ua kom lub vas me me li sai tau los ntawm thawj ob kauj ruam.

Thaum kawg, qhov cuam tshuam ib puag ncig ntawm electroplating galvanized flanges yog qhov kev sib tw ua lag luam, tab sis nws nyob deb ntawm qhov tsis tseem ceeb. Nws xav tau kev nkag siab txog txheej txheem uas mus dhau qhov ua tiav ntawm ntu. Nws yog hais txog chemistry nyob rau hauv lub tank, dej nyob rau hauv lub yaug, sludge nyob rau hauv lub tank, thiab cov kev txiav txim siab ua txhua txhua hnub nyob rau hauv lub khw hauv pem teb. Tsis quav ntsej nws yog qhov txaus ntshai; tswj nws tsuas yog ib feem ntawm kev ua cov khoom ruaj khov ua lub luag haujlwm. Kev lag luam hubs, zoo li ib qho hauv Handan uas cov tuam txhab xws li Zitai ua haujlwm, muaj qhov ntsuas kom muaj txiaj ntsig zoo rau kev hloov pauv yog tias qhov tsom mus rau qhov ntawd. Nws tsis yog hais txog kev tshem tawm cov txheej txheem, tab sis hais txog kev sib koom ua ke nws cov nqi tseeb - ib puag ncig thiab kev ua haujlwm - rau hauv txoj kev peb tsim khoom.