Qhov tseem ceeb tshaj plaws cuam tshuam rau tus nqi ntawm aluminium coils yog seb nws puas yooj yim tshem cov roj thiab hmoov av thaum ua cov khoom siv txhuas. Niaj hnub no, peb yuav ua tib zoo saib yuav ua li cas tshem cov roj thiab tshauv los ntawm cov khoom siv txhuas.
Tam sim no, muaj ntau yam roj thiab tshauv txoj hauv kev ua lag luam aluminium khoom: alkali method, acid-base method; peb txhua tus paub tias caustic soda yog siv los ua kom alkali etching, polishing thiab plua plav tshem tawm hauv 15--20 nitric acid tov, tab sis qee cov nroj tsuag ua haujlwm Vim tias tsis muaj txoj hauv kev zoo los tuav, feem ntau yog vim qhov tso tawm ntawm txhuas oxide. thiab cov concentration thiab teeb meem ntawm nitric acid. Tsis tas li ntawd, caustic soda thiab nitrate yog ob yam khoom txaus ntshai. Thaum siv, tsis hnov tsw ntawm nitrate yog piv rau cov dej qab zib caustic. Cov loj loj feem ntau tsis tuaj yeem ua rau cov neeg ua haujlwm siv, thiab lwm yam. Qee cov nroj tsuag ua tiav siv cov kuab tshuaj kom tshem tawm cov roj, uas yog volatile thiab muaj cov roj tshem tawm tsis zoo. Tshwj xeeb tshaj yog tam sim no extrusion thiab stretching roj muaj ib tug complex muaj pes tsawg leeg thiab tsis tuaj yeem raug tshem tawm los ntawm qee cov kuab tshuaj degreasing.
1. Soaking, roj tshem tawm thiab tshem tawm plua plav:
1. Ntxiv me me ntawm cov kais dej ua ntej siv, thiab tom qab ntawd muab cov khoom siv txhuas tso rau hauv pas dej ua ke; (Kho cov tshauv tshem tawm)
2. Ntxiv cov khoom siv txhuas kom tshem tawm cov roj thiab cua sov hauv 5-10 vib nas this.
3. Tom qab tshem cov roj rau 2 mus rau 3 feeb, muab tso rau hauv dej kais dej thiab ntxuav nws;
4. Kev tshem tawm plua plav nrog cov hmoov tshauv tshem tawm (tsis pub tshaj 30 vib nas this);
5. Kev ntxuav dej ---- ziab (qhuav) lossis oxidation.
Nyob rau hauv cov txheej txheem no, thaum lub cua kub kub ntawm cov roj yog siab, cov roj degreaser yuav tsim nyog diluted.
ob. Txau tshem cov roj thiab hmoov av:
1. Ntxiv cov dej kom tsim nyog rau dilute tus neeg saib xyuas degreasing thiab degreasing tus neeg sawv cev raws li.
2. Kho lub kaum sab xis ntawm lub nozzle.
3. Xyuas kom lub sij hawm txau (tsis pub tsawg tshaj 30 vib nas this);
4. Xyuas kom muaj cov dej ntws ntws tawm;
Cov khoom uas tsis dissipate txaus tshav kub thaum stretched thiab extruded yuav tsum ncua roj thiab plua plav tshem tawm lub sij hawm.
Yeej tsis muaj nag lossis daus tom qab siv cov khoom, thiab nws tuaj yeem noj tag nrho nrog tsawg dua emissions thiab muaj kuab paug tsawg. Tom qab cov roj raug tshem tawm, qhov chaw ntawm cov khoom tsis puas thiab tsis muaj corrosion ntawm qhov chaw. Tom qab cov plua plav raug tshem tawm, qhov saum npoo ntawm cov khoom yog dawb thiab muaj kev tiv thaiv zoo. Tsis muaj corrosion (tsis muaj oxidation) hauv 30 hnub.
