Nto Tu Thiab Polishing Cov Tshuab Nqus Tsev

Kev Tu Kom Haum Cov Khoom Siv Kom Qhuav

Kev ntxuav ntawm cov khoom siv lub tshuab nqus yog tshem cov roj adsorbed ntawm cov nplaim los txo cov roj evolution ntawm cov khoom nyob hauv lub tshuab nqus tsev. Cov hau kev yooj yim rau kev tu cov ntaub ntub cov khoom ntim yog cov organic tshuaj hnyav thiab ntxuav ultrasonic. Thaum tu nrog cov organic solvents, feem ntau siv cov tshuaj tu tsev xws li cov dej demineralized, ethanol, acetone, cov tshuaj ntxuav hlau thiab lwm yam.

Ntsiab cai ntawm ultrasonic tu yog muaj nyob hauv Daim duab 1.1. Tom qab ua tus ultrasonic tsis rau hauv cov kua, qhov khaus ntawm cov kua ua rau lub zos qhov sib txawv. Lub siab uas tsis tshua muaj siab yuav tsim cov npuas ntau, thiab thaum twg lub siab tuaj dua, cov npuas no yuav tawg tuaj yeem ua kom tsis muaj kev poob siab hauv cov kua. Cov dej hiav txwv poob siab yuav muab tev tawm ntawm cov roj paug rau ntawm cov khoom nplaum. Ultrasonic ntxuav dej feem ntau siv cawv los yog acetone. Tom qab ntxuav ultrasonic, muab cov khoom ntxuav hauv qhov chaw, qhov dej cawv los yog acetone yuav ua kom qhuav sai sai no, tawm hauv qhov tsis muaj nplai ntawm qhov chaw.

Fig.1 Li Ultrasonic Tu Tej Haujlwm

Polishing Cov Tshuab Ntaub Ntawv

Cov roj tso tawm ntawm lub tshuab nqus tsev thiab cov khoom sab nraud yog ncaj qha ntsig txog thaj tsam ntawm cov khoom siv. Qhov atomic ntom ntawm cov khoom nplaim yog li 2 × 10 ¹⁹ m ^-2 . Xaiv qhov tsis sib haum ntawm qhov saum npoo, qhov tiag tiag qhov tob yuav tawm ntau ntau cov pa roj molecules. Polishing tuaj yeem ua rau saum npoo ziab, thaj chaw deg yuav raug txo kom tsawg, uas yog txo cov roj molecules adsorbed rau ntawm qhov chaw. Polishing tsuas yog suav cov iav txhaj tshuaj tua blasting thiab electrolytic polishing.

Kev tua blasting ntawm iav pellets yog cov uas tsis tshua muaj nqi, tab sis qhov chaw ruaj khov ntawm cov khib nyiab tsis sib haum yog loj, nrog rau cov pa roj emulated, ces nws tab tom siv tsawg dua.

Lub hauv paus ntawm cov electrolytic polishing yog muab cov hlau tso rau hauv cov roj acidic acid, qhov hlau yog txuas nrog anode, electrode thiab lub thawv yog siv cathode, qhov hluav taws xob yog siv los ua lub qhov rooj ntawm cov hlau ib sab cov cathode yaj ua ntej, thiab Fe thiab Ni atoms hauv cov hlau yog yaj mus rau hauv lub tshuab ntshiab kom ua tiav lub hom phiaj ntawm lub qhov tob tshaj plaws (Fig.2). Yog tias lub cathode electrode yog yooj yim pab, ob qho tib si sab hauv thiab sab nraud ntawm tus cylindrical hlau tus neeg yuav tsum tau polished, thiab cov hlau qhov tseem tuaj yeem raug xaiv ua cov xim ib nrab.

Fig.2 Electrolytic polishing schematic

Electrolytic polishing tuaj yeem tshem tawm cov lus tsis zoo (0.01 μm mus ob peb μm) rau ntawm cov hlau, ua kom lub pob zeb ci, tiam sis nws tsis tuaj yeem tua cov teeb meem loj dua. Electrolytic polishing yog hom hlau electrochemical polishing, thiab oxide zaj duab xis ua rau saum npoo kuj txo cov adsorption ntawm cov roj molecules.

Nws tseem muaj qhov tshwj xeeb saum kev kho mob, uas yog, qhia txog cov pa roj tshwj xeeb rau hauv lub qhov chaw nqus tsev kom ntxhe ua pa tawm hauv cov kab noj hniav, thiab cov ion generated tsoo lub qhov ntsa ntawm cov kab noj hniav kom tau ib lub qhov saum npoo.

Cov dej ntws ntawm qhov chaw nqus dej thiab cov khoom yuav tsum tsis txhob kov los ntawm tes kom tsis txhob muaj cov kab mob roj carbon monoxide thiab cov chlorides nyob hauv hws. Dhau li, plua plav thiab dej vov (qaub ncaug) yuav tsum zam kom ntau li ntau tau.