Zinc DROS yog feem ntau cov khoom ntawm cov tshuaj tiv thaiv ntawm cov tshuaj tiv thaiv ntawm zinc thiab hlau. Nws muaj pes tsawg leeg tsuas yog cov hlau-zinc alloy theem tsim tom qab kev sib xyaw ntawm zinc thiab hlau. Yog li ntawd, Zinc Dross feem ntau muaj txog 3 txog 6% hlau thiab txog 94 txog 97% zinc. Hauv qee qhov kub-dip galvanizing cov txheej txheem, txhuas yog ntxiv los tiv thaiv cov lauj kaub galvaning. Nyob rau hauv cov xwm txheej zoo li no, Zinc DROSs tuaj yeem muaj 1.5 rau 2% txhuas (tsis yog hais txog cov hmoov txhuas ua ke). Feem ntau, hauv cov kub-dip galvanizing ntawm cov kav hlau steel, txhuam yog txhob txwm ntxiv kom tau txais lub galvanized txheej. Yog li ntawd, zinc dross tej zaum kuj tseem muaj qee qhov nyiaj ntawm txhuas.
Cov kav hlau steel tsuas tuaj yeem tsuas yog muab tso rau hauv cov da dej zinc tom qab pretreatment. Thaum lub sij hawm pretreatment, kev ntxuav ua tsis tiav yuav ua rau cov khoom siv hlau kom ua raws li lub npoo ntawm cov yeeb nkab steel los ua galvanized. Ntawm Galvanizing kub, cov khoom siv hlau xws li kav hlau steel, steel galvanizing tshuab, thiab cov yeeb nkab Galvanizing Galvanizing hauv Dinc Da dej. Kev sib nrig sib sib zog ntawm hlau thiab zinc atoms cov txiaj ntsig hauv kev tsim ntawm cov hlau-zinc alloy txheej. Ntawm lawv, lub phase phastals tuaj yeem detach los ntawm substrate thiab tog rau hauv qab ntawm cov lauj kaub galvanizing, sau kom zinc dross. Feem ntau, hauv txoj kev ua kom qhuav "kub-dip galvanizing zus tau tej cov kav hlau steel, tus nqi ntawm zinc poob nyiaj rau txog li 10 txog 20% ntawm tag nrho zinc tau.
Thaum lub sij hawm tsim cov zinc dross, cov kev tawm tsam muaj raws li hauv qab no:
(1) cov tshuaj tiv thaiv tshwm sim los ntawm cov ntsev hlau
Fecl₂ + 8 Zn → zncl₂ + fezn
Fecl₂ + 14 Zn → zncl₂ + fezn₁₂
(2) cov tshuaj tiv thaiv tshwm sim los ntawm cov hlau
Fe₈c + 21 zag zn → 3fezn₇ + cfe₈
C + 39 zag zn → 3fe₈zn₁₈ + c
