Refining txoj kev ntawm ferrochrome
Nruab nrab, qis thiab micro-carbonferrochromeFeem ntau yog ua los ntawm silicochrome alloy, chromite thiab txiv qaub li raw cov ntaub ntawv, refined thiab desilicated los ntawm 15{{10}}}0 ~ 6000 kVA hluav taws xob rauv, thiab ua los ntawm siab alkalinity slag (CaO/SiO2 yog 1.6 ~ 1.8 ). Tsawg - thiab micro-carbon ferrochrome kuj yog tsim los ntawm thermal blending ntawm ib qho loj. Hauv kev tsim khoom, ob lub tshuab hluav taws xob tau siv, ib qho smelting silicon chromium alloy, lwm yam slag melting li ntawm chromium ore thiab txiv qaub. Cov tshuaj tiv thaiv refining yog nqa tawm nyob rau hauv ob theem nyob rau hauv ob lub thoob: ① Tom qab lub slag ntawm lub slag rauv yog txhaj rau hauv thawj lub thoob, cov silicon chromium alloy uas tau preliminarily desiliconized nyob rau hauv lwm lub thoob yog ntxiv. Vim tias qhov ntau dhau ntawm oxidizer hauv slag thiab txaus desiliconization, micro-carbon ferrochrome nrog silicon cov ntsiab lus tsawg dua 0.8% thiab cov ntsiab lus carbon tsawg li 0.02% tuaj yeem tau. ② Lub molten slag (muaj li ntawm 15% Cr2O3) tom qab cov tshuaj tiv thaiv nyob rau hauv thawj lub ladle yog tsiv mus rau lub thib ob ladle, lub silicochrome alloy (muaj 45% silicon) ua los ntawm lub silicochrome hluav taws xob rauv yog rhuab rau hauv lub slag, thiab thawj desiliconized. silicochrome alloy (muaj li ntawm 25% silicon) tau txais tom qab cov tshuaj tiv thaiv, thiab ntxiv desiliconized ntxiv rau hauv thawj lub ladle, thiab cov slag uas muaj tsawg dua 2 ~ 3% Cr2O3 tuaj yeem tso tseg.
Oxygen tshuab refining nruab nrab thiab qis carbonferrochrome, siv cov kua roj carbon ferrochrome ua cov khoom siv raw, ntxiv me me ntawm cov txiv qaub thiab fluorite rau lub pas dej molten ua slag, ntxiv silicon chromium alloy los yog ferrosilicon ua ntej hlau rho tawm kom rov qab tau cov chromium hauv slag. Lub tshuab ntawm micro-carbon ferrochrome yog ua tau nyob rau hauv ib lub tshuab nqus tsev kawm ntawv.
Nqus khoom lub xeev decarburization refining, siv finely av high-carbon ferrochrome li raw khoom, nyob rau hauv uas ib feem ntawm lub finely av high-carbon ferrochrome yog oxidized thiab calcined raws li ib tug oxidizing neeg sawv cev, nrog dej iav los yog lwm yam binder, nias rau hauv ib tug loj, Tom qab tsis tshua muaj kub kom qhuav, rhuab thiab txo nyob rau hauv lub tsheb-hauv qab lub tshuab nqus tsev rauv ntawm lub tshuab nqus tsev kawm ntawv ntawm 0.5 ~ 1{{10}}} hli Hg thiab kub ntawm 1300 ~ 1400 degree rau 35 ~ 50 hnub. Cov microcarbon ferrochrome muaj cov pa roj carbon tsawg dua 0.03% lossis tsawg dua 0.01% tuaj yeem tau txais.
