Qhov chaw muab faib
Ib hom yog tshiab khawb tooj liab
uas yog cov pov tseg tsim nyob rau hauv cov txheej txheem kev lag luam tooj liab. Cov khoom seem tooj liab los ntawm cov nroj tsuag metallurgical hu ua "tsev seem" lossis "runaround". Cov khoom seem tooj liab uas tsim los ntawm cov khoom siv tooj liab thiab ncaj qha xa rov qab mus rau tus neeg muag khoom yog hu ua "industrial scrap tooj liab", "prompt" lossis tshiab seem tooj liab.
Lwm hom yog cov khoom qub qub,
uas yog cov khoom pov tseg tom qab siv, xws li cov khoom pov tseg lossis rhuav tshem ntawm cov tsev qub thiab cov tsheb thauj mus los. Cov khoom siv tooj liab thiab tooj liab, txawm tias nyob hauv lub xeev liab qab lossis qhwv hauv cov khoom kawg, tuaj yeem rov ua dua thiab rov tsim dua tshiab ntawm txhua theem ntawm cov khoom lag luam lub neej. Feem ntau hais lus, cov khoom seem tooj liab tshiab rau ntau tshaj li ib nrab ntawm cov seem tooj liab siv rau kev rov ua dua tshiab. Tom qab reprocessing, li ntawm 1/3 ntawm tag nrho cov seem tooj liab rov qab mus rau lub lag luam nyob rau hauv daim ntawv ntawm refined tooj liab, thiab lwm yam 2/3 yog reused nyob rau hauv daim ntawv ntawm unrefined tooj liab los yog tooj liab alloy. Lub hauv paus ntawm kev siv ncaj qha ntawm cov seem tooj liab yog nruj kev faib tawm thiab stacking thiab nruj sorting. Daim ntawv thov ncaj qha ntawm cov seem tooj liab muaj qhov zoo ntawm cov txheej txheem yooj yim, cov cuab yeej siv yooj yim, tus nqi rov qab siab, kev siv hluav taws xob tsawg, tus nqi qis thiab lub teeb muaj kuab paug. Tus nqi ntawm kev thov ncaj qha ntawm cov seem tooj liab feem ntau qhia txog qib ntawm kev siv tooj liab hauv ib lub tebchaws. Hauv qhov sib piv, qhov kev siv ncaj qha ntawm cov seem tooj liab hauv kuv lub teb chaws yog qhov tsawg, kwv yees li 200,000 tons hauv ib xyoos, suav txog tsuas yog 30% txog 40% ntawm tag nrho cov khoom siv tooj liab rov qab, thiab kev tsim cov tooj dag. Cov ntaub ntawv ua haujlwm feem ntau yog ua los ntawm cov tuam txhab hauv nroog, uas txo cov txiaj ntsig kev lag luam thiab ua rau muaj teeb meem hauv kev siv hluav taws xob thiab kev tiv thaiv ib puag ncig.
Classification Standard
Feem ntau, kev faib cov seem tooj liab yog ua raws cov ntsiab lus ntawm cov tooj liab ntshiab,
Bright copper (Cu>99%)
#1 tooj liab (Cu 97%)
#2 tooj liab (95%-96%)
Lub cev muaj zog tooj liab (92 ~ 94%): feem ntau cov tooj liab ntawm lub cev muaj zog hauv lub cev muaj zog.
Liab tooj liab (79-81%)
Smelting qib liab tooj liab (Cu90-92%)
Liab tooj liab cib (CU93%)
Hluav taws kub (95-97%)
Liab tooj liab
H59 tooj liab. Brass yog sawv cev los ntawm + H; (daj) sawv cev H80, H70, H68 H59, thiab lwm yam.
Qhov tseeb, lawv txhua tus hu ua tooj liab liab, tab sis qhov uas tau pauv ntau dua hauv kev ua lag luam hu ua tooj liab liab, nrog cov ntsiab lus tooj liab txog li 80%. Brass kuj yog ib hom khoom seem uas tau pauv ntau zaus. Cov tooj dag dav dav yog 59 tooj dag, uas muaj 59% tooj liab ntshiab, thiab tus so yog zinc. Hom tooj liab no kuj hu ua daj tooj liab.
Main alloy seem tooj liab
Brass{0}}Copper-zinc alloy
Bronze-----Copper-tin alloy, thiab lwm yam. (Tshwj tsis yog zinc thiab npib tsib xee, alloys nrog lwm cov khoom hu ua tooj liab)
Dawb tooj liab-----Copper-cobalt-nickel alloy
