Yuav ua li cas yog PTFE Exchangers Deployed nyob rau hauv Zinc Electrowinning Cell Cooling Systems?

Zinc electrowinning, zoo li tooj liab, siv cov sulfuric acid electrolyte thiab tsim kom muaj zog ohmic cua sov. Tab sis zinc yog qhov cuam tshuam rau qhov kub thiab txias thiab muaj cov tshuaj fluoride impurities los ntawm zinc concentrates nthuav tawm lwm qhov teeb meem corrosion rau cov khoom cua txias.

Zinc Electrowinning
Nyob rau hauv zinc electrowinning zinc yog tso los ntawm kev daws ntawm sulfuric acid, feem ntau nyob rau hauv 150-200 g / L H2 SO4 ntau yam. Qhov kub ntawm electrolyte yuav tsum tau khaws cia nyob rau hauv ib qho kev txwv qhov rais ntawm 35-40 ° C los tiv thaiv cov undesired evolution ntawm hydrogen roj thiab kom ua tau ib tug zoo deposition tus nqi. Txhua qhov kev hloov pauv ntawm qhov ntsuas kub no tuaj yeem ua rau muaj txiaj ntsig zoo rau kev ua haujlwm ntawm electrolytic cell, txo cov zinc rov qab thiab nce kev siv zog.

Cov tshuab cua txias yog siv los tswj qhov kub thiab txias thiab tswj kev ua haujlwm zoo. Cov khoom siv no yog qhov tseem ceeb ntawm kev khaws cov electrolyte nyob rau hauv qhov kub ntawm lub hom phiaj thiab kom ua tiav cov khoom siv hluav taws xob ohmic uas tsim thaum lub sij hawm electrowinning.

Kev Sib Tw Tshwj Xeeb ntawm Cov Kabmob Fluoride
Kev taw qhia ntawm fluoride ions (feem ntau nyob rau hauv zinc concentrates) rau hauv electrolyte ua rau zinc electrowinning txias txheej txheem nyuaj dua. Fluoride ions yog qhov ua siab phem rau cov hlau feem ntau, thiab tuaj yeem ua rau muaj kev xeb loj heev (ob peb ppm txog kaum ntawm ppm). Fluoride ions kuj hnov ​​​​mob nrog ntau lwm yam khoom siv hauv cov tshuab ua kom txias, ua rau lawv sai sai thiab tsis ua haujlwm.

Kev xaiv cov khoom siv rau cov khoom siv hluav taws xob sib txawv yuav tsum tiv taus cov sulfuric acid thiab fluoride ions vim qhov hnyav ntawm electrolyte. PTFE (Polytetrafluoroethylene) yog cov khoom siv zoo tshaj plaws rau kev siv vim nws cov tshuaj tiv thaiv zoo heev. PTFE yog resistant rau fluoride nres ntawm qhov kub thiab txias nyob rau hauv zinc electrowinning (35-40 ° C) thiab yog li ntawd zoo tagnrho rau cov tshav kub exchanger daim ntaub ntawv nyob rau hauv cov chaw no.

PTFE Configuration Thaum tshav kub kub Exchanger
Qhov nrov tshaj plaws cua txias system nyob rau hauv zinc refineries yog lub plhaub thiab lub raj kub exchanger. PTFE raj yog siv rau txoj hauv kev hauv cov kua dej thiab cov dej txias ntws ncig ntawm lub plhaub sab. Qhov kev tsim no tso cai rau kev hloov pauv kom zoo thiab txo qhov txaus ntshai ntawm corrosion thiab khoom degradation. Cov raj PTFE kuj tseem muaj kev ncaj ncees zoo nyob rau lub sijhawm, tshwj xeeb tshaj yog nyob rau hauv muaj cov tshuaj fluoride- muaj sulfuric acid, uas ua kom ntseeg tau tias kev ua haujlwm ntawm cov cua txias.

Lub plhaub - thiab - raj siv nrog PTFE hlab yog siv vim nws muab kev yooj yim los tswj cov nqi sib txawv thiab qhov kub thiab txias sib txawv, thaum ua corrosion resistant. Lub plhaub sab nrauv feem ntau yog ua los ntawm cov hlau tsis muaj steel lossis lwm yam corrosion resistant alloys thiab PTFE raj raug xaiv rau lawv cov tsis kam mus rau tus cwj pwm nruj ntawm cov electrolyte.

Nco tseg ntawm Cov Khoom Siv Tau: PTFE piv rau Lwm Cov Khoom
Cov Khoom Siv Ua Haujlwm rau Sulfuric AcidTeflon Fluoride Resistance Daim ntawv thov nyob rau hauv Zinc ElectrowinningExcellent Kev xaiv zoo tshaj plaws, vim nws yog resistant rau sulfuric acid thiab fluoride ions.
Stainless Hlau Zoo Tsis Txaus Siab rau corrosion los ntawm fluoride ions thiab tsis tsim nyog rau kev siv mus sij hawm ntev hauv fluoride bearing nqis.
Titanium zoo heev tsis zoo tiv thaiv Sulfuric Acid, tab sis raug tua los ntawm Fluoride. Tsis pom zoo rau cov tshuaj fluoride uas muaj electrolyte.
Graphite Nruab Nrab Nruab Nrab Graphite tiv taus sulfuric acid, tab sis tuaj yeem hnav nrog cov tshuaj fluoride, yog li tsis yog ib txwm haum rau cov kev siv no.
PTFE heat exchangers yog unsurpassed nyob rau hauv lawv tsis kam mus rau corrosive los ntawm ob qho tib si sulfuric acid thiab fluoride ions nyob rau hauv zinc electrowinning txias systems.

Xaus
PTFE heat exchangers yog qhov zoo tagnrho rau txias zinc electrowinning tov vim lawv tiv taus ob qho tib si sulfuric acid thiab fluoride ions. Cov electrolyte muaj fluoride ions. Cov ntaub ntawv siv yuav tsum muaj peev xwm tiv taus tshuaj lom neeg thiab kub ntxhov siab yam tsis muaj kev cuam tshuam rau kev ncaj ncees ntawm lub cev. PTFE exchangers tau raug pov thawj los ua qhov zoo tshaj plaws kev daws teeb meem los tswj cov electrolyte kub, kom ntseeg tau tias zinc deposition thiab limiting hydrogen evolution.

Kev xaiv cov khoom siv yog ib feem tseem ceeb ntawm kev ua haujlwm hydrometallurgical, tshwj xeeb tshaj yog thaum cuam tshuam nrog cov kab mob xws li fluoride. Kev xaiv cov tshuaj lom neeg sib raug zoo ntawm cov ntaub ntawv xws li PTFE ua kom lub neej ntev tshaj plaws thiab kev cia siab ntawm cov cua txias, uas ua rau muaj txiaj ntsig tag nrho ntawm cov txheej txheem zinc electrowinning.