Kev rov ua dua thiab ua cov khoom seem thiab lwm yam txhuas feem ntau ua raws li plaub txheej txheem hauv qab no.
(1) Kev npaj ntawm cov khoom seem aluminium: Ua ntej, ua thawj qhov kev txheeb xyuas ntawm cov seem aluminium thiab categorize nws cia, xws li ntshiab txhuas, deformed aluminium alloys, cam khwb cia txhuas alloys, thiab cov khoom sib xyaw. Rau cov khoom seem aluminium, lawv yuav tsum tau disassembled kom tshem tawm cov hlau thiab lwm yam tsis yog -ferrous hlau qhov chaw txuas nrog txhuas, thiab tom qab ntawd ua tiav los ntawm kev ntxuav, crushing, sib nqus sib nqus, ziab, thiab lwm cov kauj ruam los ua cov khoom seem txhuas. Rau nyias, xoob daim ntawv- zoo li cov khoom seem ntawm txhuas, xws li xauv caj npab ntawm lub tsheb, ceev iav bushings, thiab txhuas shavings, lawv yuav tsum tau compressed rau hauv bales siv hydraulic hlau baler. Rau steel-core aluminium stranded hlau, cov tub ntxhais hlau yuav tsum tau muab cais ua ntej, thiab tom qab ntawd cov hlau txhuas yog coiled.
Hlau impurities muaj teeb meem heev rau smelting ntawm seem aluminium. Thaum cov ntsiab lus hlau ntau dhau, nkig hlau crystals tsim nyob rau hauv aluminium, txo nws cov khoom siv dag zog thiab ua rau nws tsis muaj zog corrosion. Cov ntsiab lus hlau feem ntau tswj tau qis dua 1.2%. Cov khoom siv hlau nplaum nrog cov ntsiab lus hlau siab tshaj 1.5% tuaj yeem siv los ua deoxidizer hauv kev lag luam steel, tab sis kev lag luam aluminium alloys tsis tshua siv cov khoom siv txhuas nrog cov ntsiab lus hlau siab rau smelting. Tam sim no, tsis muaj txoj hauv kev zoo tshaj plaws hauv kev lag luam txhuas kom txaus siab tshem tawm cov hlau ntau dhau los ntawm seem txhuas, tshwj xeeb tshaj yog thaum cov hlau muaj nyob rau hauv daim ntawv ntawm stainless hlau.
Cov khib nyiab txhuas feem ntau muaj cov organic uas tsis yog{0}} hlau impurities xws li xim, roj, yas, thiab roj hmab. Ua ntej remelting, cov no yuav tsum tau muab tshem tawm. Rau cov khoom seem ntawm txhuas nyob rau hauv daim ntawv ntawm cov xov hlau, kev sib tsoo tshuab los yog kev tshem tawm, cua sov stripping, los yog tshuaj stripping feem ntau yog siv los tshem tawm cov rwb thaiv tsev. Tam sim no, cov tuam txhab lag luam hauv tsev feem ntau siv siab - kub kub incineration kom tshem tawm cov ntaub ntawv insulating. Cov txheej txheem no ua rau muaj cov pa phem ntau heev, ua rau huab cua phem heev. Yog tias kev sib xyaw ua ke ntawm qis- qhov kub thiab txias yog siv, cov khoom siv insulating yog thawj zaug softened los ntawm tshav kub, txo nws cov neeg kho tshuab zog, thiab tom qab ntawd mechanically tshem tawm los ntawm rubbing. Txoj kev no tsis tsuas yog ua kom huv si xwb tab sis kuj tso cai rau kev rov qab los ntawm cov ntaub ntawv rwb thaiv tsev. Cov coatings, roj stains, thiab lwm yam kab mob nyob rau saum npoo ntawm cov khoom siv txhuas tuaj yeem ntxuav tau siv cov kuab tshuaj organic xws li acetone. Yog tias lawv tseem tsis tuaj yeem raug tshem tawm, yuav tsum siv lub qhov cub tshem tawm xim. Qhov kub siab tshaj plaws ntawm lub qhov cub tshem tawm cov xim yuav tsum tsis pub tshaj 566 degree. Tsuav cov khoom seem nyob hauv lub cub tawg ntev txaus, feem ntau cov roj thiab cov txheej txheem tuaj yeem raug tshem tawm kom huv si.
Rau cov ntawv txhuas ntawv ci, nws yog qhov nyuaj rau kev sib cais cov ntawv txhuas txheej los ntawm cov ntawv fiber ntau siv cov khoom siv khib nyiab zoo tib yam. Ib txoj hauv kev zoo yog ua ntej tso cov ntawv txhuas ntawv ci rau hauv cov dej aqueous rau cua sov thiab lub zog, tom qab ntawd tso tawm sai sai rau hauv qhov chaw qis - siab rau decompression, thiab ua txhua yam stirring. Txoj kev sib cais no tso cai rau kev rov qab los ntawm ob daim ntawv fibers thiab aluminium foil.
Lub liquefaction thiab kev sib cais ntawm cov seem aluminium yog cov kev taw qhia yav tom ntej rau kev rov ua dua hlau hlau. Nws muab cov khoom ua ntej ntawm seem aluminium impurities nrog remelting, uas tsis tsuas yog shortens cov txheej txheem tab sis kuj txo cov pa phem thiab ua rau kom rov qab zoo ntawm cov hlau ntshiab.
Cov cuab yeej muaj lub lim uas tso cai rau cov pa roj kom dhau mus. Nyob rau hauv lub liquefaction txheej, txhuas precipitates nyob rau hauv qab, thiab cov organic tshuaj xws li cov xim txuas mus rau cov seem txhuas decompose rau hauv cov pa roj, tar, thiab cov khoom carbon ntawm kub siab tshaj 450 degree, uas yog ces tag nrho cov hlawv los ntawm oxidation ntaus ntawv nyob rau hauv lub separator. Cov khoom seem yog nplawm los ntawm lub nruas rotating thiab tov nrog cov tshuaj nyob rau hauv lub tank, nrog impurities xws li xuab zeb thiab gravel sib cais rau hauv cov xuab zeb thiab gravel sib cais cheeb tsam, thiab cov tshuaj nqa tawm los ntawm cov khoom seem yog xa rov qab mus rau lub liquefaction tank los ntawm ib tug rov qab kiv cua.
(2) Raws li kev npaj thiab zoo ntawm cov khoom seem aluminium, cov khoom xyaw raug xaiv thiab tus nqi ntawm txhua hom khoom raug xam raws li cov kev xav tau ntawm cov khoom siv rov ua dua tshiab. Thaum npaj cov khoom sib xyaw, cov qib ntawm cov hlau oxidation thiab hlawv yuav tsum raug txiav txim siab; qhov kub hnyiab ntawm silicon thiab magnesium yog ntau dua li ntawm lwm yam alloying ntsiab lus, thiab qhov poob ntawm ntau yam alloying ntsiab yuav tsum tau txiav txim siab sim ua ntej. Lub cev specifications thiab deg huv si ntawm seem aluminium yuav cuam tshuam ncaj qha rau qhov zoo ntawm cov khoom siv dua tshiab thiab cov khoom siv hlau tiag tiag. Rau cov seem txhuas uas tsis tau ntxuav cov roj, txog li 20% ntawm cov khoom siv tau zoo yuav xaus rau hauv cov slag.
(3) Recycled deformed aluminium alloys. Scrap aluminium alloys siv los ua deformed aluminium alloys suav nrog 3003, 3105, 3004, 3005, 5050, thiab lwm yam, nrog 3105 alloy yog cov khoom tseem ceeb. Txhawm rau kom ntseeg tau tias cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov hlau ua tau raws li cov kev xav tau thiab cov txheej txheem xav tau rau kev tsim siab, nws yuav tsum tau ntxiv ib feem ntawm cov thawj aluminium ingots.
(4) Recycled casting aluminium alloys. Tsuas yog ib feem me me ntawm cov khoom siv txhuas rov ua dua rau hauv deformed aluminium alloys; kwv yees li 1/4 yog rov ua dua rau hauv deoxidizers rau steelmaking, thaum feem ntau yog siv rau rov siv dua casting aluminium alloys. Hauv cov teb chaws xws li Tebchaws Meskas thiab Nyij Pooj, dav siv tuag-casting aluminium alloys xws li A380 thiab ADC10 yog qhov pib siv los ntawm cov khoom siv txhuas.
