Hnub Luam Ntawv: Lub Rau Hli 24, 2025
Nrog kev ruaj ntseg ntawm qhov ua ntej ntawm txoj cai kev lag luam, galvanizing mills thiab seem cov txheej txheem kom muaj ob npaug ntawm kev ua haujlwm tshiab rauGalvanized steelCov. Cov tswv yim tshiab ua rau rov qab zoo zinc Txheej txheej thiab steel substrates ntau dua, txiav cov khib nyiab thiab txo qis ntawm lub sijhawm ua haujlwm tag nrho.
Traditionally, the challenge has stemmed from separating the zinc plating from the underlying steel without incurring high energy costs or secondary pollution. Recent pilot programs in Scandinavia, led by Sweden's LKAB Recycling, have demonstrated a closed‐loop hydro‑metallurgical process that dissolves zinc layers in mild acid baths, precipitating zinc oxide for reuse. The regenerated zinc meets premium purity specs (>99.5%) thiab txau rov qab los rau hauv cov kab galvanizing, txo qhov kev cia siab rau cov mined concentrates txog li 12%.
Ib txhij, German steelmaker steeltech tau sib koom tes nrog kev lag luam ncig-kev lag luam startup greenstel tshuab mus sim "electro-scrap" mus kom ze. Kawg-ntawm-lub neej galvanized panels yauv tsawg-kub electrolysis theem, hle zinc ua cov duab ua yeeb yaj kiab. Cov khoom siv hlau uas seem, pub dawb, pub rau hauv hluav taws xob arc nrog kev ua ntej ua ntej, ua kom nrawm rau 20% piv rau cov kev sib tw.
Nyob rau hauv Asia, tsis-ferrous hlau Chinco tau tsim cov kev sib koom ua ke ntawm Japomese cov ecometals los tsim lawv thawj kab ke hla ciam teb zinc rov qab cog hauv Malaysia. Lub chaw yuav ua tiav cov txheej txheem 200,000 tons ntawm galvanized seem ib xyoos ib zaug, siv zog rau kev taug kev hauv hydromet thiab electrochemical. Cov tub ceev xwm uas rov ua dua tshiabGalvanized steelCov ntsiab lus nyob rau hauv thaj av Aseets tuaj yeem nce ntawm 8% hauv 2024 txog 1825 los ntawm 2027, kho kom haum rau lub hom phiaj kev lag luam ncig-kev khwv nyiaj txiag.
Cov neeg siv kawg tseem tau sau ntawv. Cov tuam txhab siv loj hauv tebchaws Askiv thiab Australia tam sim no qhia qhov tsawg kawg 30% rov ua cov ntsiab lus rau galvanized steel txheej txheem. Los ntawm hais txog cov voj kaw-lub tshuab, cov neeg muaj feem xyuam hla tus nqi ntawm cov khoom siv tawm los ntawm cov qauv zoo nkauj los ntawm cov qauv sib dhos rau hauv ib qho kab ke tag nrho.