Kev nyob zoo tam sim no hauv lub ntiaj teb niaj hnub yuam kom ntau thiab ntau tus neeg xav txog kev siv cov khoom pov tseg, tshwj xeeb yog ib qho muaj cov ntaub ntawv tsis yooj yim. Hauv qhov no, ib lub lag luam rau kev txais tos ntawm cov khoom siv rov ua dua tshiab thiab nws cov txheej txheem tshwm sim.
Dab tsi tuaj yeem nqa mus rau kev rov ua dua tshiab
Tau ntau xyoo, cov ntawv pov tseg tau txais - cov ntawv ntim, ntawv, ntawv xov xwm, ntawv xov xwm, duab los qhia, chaw ua hauj lwm ntawv. Muaj ntau lub ntsiab lus rau txais cov iav - cov fwj, cov kaus poom, cullet. Peb kuj tseem tau txais cov ntawv sau los ntawm cov hlau lim thiab cov hlau tsis huv, txhuas poom hlau. Muaj cov ntsiab lus uas koj tuaj yeem tso koj cov khaub ncaws qub qub, ntaub, cov khoom ua si thiab khau.
Cov pheej yig thiab yooj yim ua cov yas tau ua nws ib qho ntawm cov ntaub ntawv nrov tshaj plaws ntawm lub ntiaj teb: lub hnab, zaj duab xis, ntim thiab lub raj rau cov khoom noj thiab dej haus, cov tais diav, cov rooj plaub, cov khoom siv, rooj tog thiab ntau ntxiv yog tsim los ntawm nws. Nrog kev tsim ua ntau zuj zus thiab kev siv ntau, kev sib kis ntawm cov yas thoob plaws. Cov peev txheej ntim ntau ntawm cov yas ntim pov tseg (piv txwv li cov zaub mov muag hauv nws) thiab xaus rau hauv lub thoob khib nyiab tuaj yeem tam sim ntawd tom qab tshem cov khoom muag. Txhawm rau pov tseg nyob rau hauv ntuj tsim, yas yuav siv sij hawm ntau dua ib puas xyoo, thaum nws tseem yuav lom cov av. Zoo hmoo, muaj cov ntsiab lus uas cov khoom lag luam yas tau txais thiab xa mus rau cov chaw tsim khoom siv rov ua haujlwm. Muaj, cov ntaub ntawv nyoos tau los ntawm nws nyob rau hauv daim ntawv ntawm polymer granules, los ntawm cov khoom yas uas tom qab ntawd rov ua dua.
Cov khib nyiab zoo tsim nyog xav tau tshwj xeeb: cov roj teeb roj, cov khoom siv roj av, cov teeb roj mercury thiab cov cuab yeej siv. Kev rov qab siv dua yog qhov nyuaj thiab tsis kim, yog li muaj tsawg dua cov khoom muaj kev phom sij khaws cov ntsiab lus ntau dua li qhov xav tau thiab nws tsis tshua pom muaj nyob ze. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tau khaws cov khib nyiab thiab rov ua nws kom tsis tu ncua, vim nws muaj kuab paug ntau thiab tsim kev puas tsuaj rau tib neeg kev noj qab haus huv. Lawv tau txais ntau me hauv cov khw loj thiab cov khw muag khoom.
Tseem muaj qhov chaw uas muaj ntau qhov pov tseg tshwj xeeb: cov khoom siv hauv tsev, khoos phis tawj thiab khoos phis tawm, cov khoom siv hluav taws xob, lub log tsheb, lub thawv rau cov khoom siv hauv chaw ua haujlwm, thiab lwm yam.
Cov ntsiab lus
Txhawm rau hais txog cov khoom pov tseg rov ua dua, kuj muaj cov lus hais rov ua dua tshiab, rov ua dua tshiab, cov khoom siv rov ua dua tshiab, cov khoom siv pov tseg. Nws muaj feem xyuam nrog kev rov siv cov khoom siv hauv tsev thiab cov pov tseg ntau lawm. Kev ua tiav tuaj yeem yog theem nrab, tertiary, thiab lwm yam.
Txhawm rau cov khoom siv raw kom tsim nyog rau kev coj ua, lawv yuav tsum ua raws li qee qhov xav tau. Yog li, daim ntawv pov tseg yuav tsum muaj qhov tso cai pom zoo ntawm cov impurities, uas txawv rau kev tsim cov ntawv sib txawv. Daim ntawv pov tseg yuav tsum tau muab rau yuav tsum tsis txhob muaj lwm cov ntsiab lus ntxiv nrog cov ntawv - txhawm rau ntawv tom qab, cov ntaub polymer thiab zaj duab xis, cov ntsiab ntoo thiab hlau. Cov thawv ntim khoom yas yuav tsum tsis muaj cov ntawv lo, ntxuav huv, thiab lwm yam.
Yog li, ua ntej xa khoom, cov khoom siv rov qab yuav tsum npaj thiab txheeb kom lawv tuaj yeem txais los ntawm qhov tsis muaj teeb meem. Koj tuaj yeem tshawb xyuas qhov yuav tsum tau ua ntej ntawm qhov chaw txais tos.
