85. Qhov kub ntawm zinc molten ntawm zinc slag yog dab tsi? Dab tsi ntawm cov ntsiab lus hlau hauv molten zinc tuaj yeem siv tsis tau lawm?

Thaum molten zinc ncav cuag qhov kub thiab txias, cov hlau tseem ceeb yaj rau hauv nws. Piv txwv li, ntawm 510 degree, 0.10% ntawm hlau yaj, tsim zinc slag uas yog 1.6% ntawm tag nrho cov zinc ntsiab lus nyob rau hauv lub lauj kaub galvanizing. Txawm tias tom qab txias rau 435 degree, cov hlau seem tseem nyob ntawm 0.02%. Thaum lub caij txias, cov hlau no precipitates li feeb hlau-zinc compound crystals uas maj mam nyob ntawm lub lauj kaub hauv qab. Yuav kom txo qis cov crystalline zinc residues (hlau-zinc alloys), cov zinc molten yuav tsum tau khaws cia ntawm 435℃rau kwv yees li ib hnub tom qab-kev kho kub. Txawm li cas los xij, kev tuav ntev ntev yog txwv tsis pub siv hauv kev ua haujlwm, yuav tsum tau txo qhov kub thiab txias thaum lub sij hawm galvanizing txheej txheem.
Thaum qhov kub ntawm zinc molten nce, intensified tshav kub convection nqa zinc slag nce mus rau hauv lub lauj kaub galvanizing, paug cov zinc da dej ntawm immersion qhov tob thiab degrading galvanized txheej zoo. Lub xub ntiag ntawm zinc slag ntxiv cuam tshuam molten zinc ntws, eroding cov hlau -zinc alloy txheej ntawm lub lauj kaub phab ntsa. Qhov no nthuav tawm cov phab ntsa kom nrawm dua corrosion thiab ua rau muaj zog zinc slag tsub zuj zuj.
Kev khaws cia ntev ntawm zinc slag hauv galvanizing pots ua rau nws sintering rau hauv pob, nrog rau qhov tshwm sim zuj zus thaum kub nce. Qhov no tsis tsuas yog cuam tshuam kev tshem tawm tab sis kuj cuam tshuam cov cua sov ntawm lub lauj kaub galvanizing, ua rau overheating ntawm lub lauj kaub phab ntsa (steel daim hlau) thiab tom qab zinc to los ntawm perforation.
Nyob rau hauv ib txwm ua haujlwm kub-dip galvanizing txheej txheem ntau lawm, cov ntsiab lus hlau nyob ze ntawm qhov chaw ntawm zinc molten yuav tsum tsawg, feem ntau tsis tshaj 0.05%. Yog hais tias cov ntsiab lus hlau ncav cuag lossis tshaj 0.2%, kub-dip galvanizing yuav tsum tau txiav. Txij li thaum zinc immersion qhov tob feem ntau yog nyob ib ncig ntawm 400 millimeters, cov ntsiab lus hlau nyob rau hauv cheeb tsam no kuj yuav siab dua, yuav tsum muaj kev tswj xyuas nruj.