Metallurgical coke feem ntau yog siv los ua tus neeg sawv cev txo qis rau ferrosilicon smelting. Metallurgical coke yog coke tsim ntawm qhov kub ntawm coking ntawm 1100 txog 1300 degree thaum lub sij hawm coking txheej txheem, yog li nws tseem hu ua high-temperature coke los yog tag nrho coke. Coke tsim ntawm qhov kub ntawm 600 mus rau 800 degree yog hu ua low-temperature coke lossis semi-coke. Gas coke yog ib hom uas tsis muaj qhov kub thiab txias. Lub npe hu ua gas coke yog ib qho khoom siv los ntawm cov roj rho tawm.
Cov khoom ntawm cov roj coke thiab metallurgical coke yog muab piv rau hauv qab no:
1. Kev tiv thaiv
Cov kev sib raug zoo ntawm cov resistivity thiab kub ntawm cov cokes sib txawv nrog ib tug particle loj ntawm 10 mus rau 15 mm yog qhia nyob rau hauv daim duab 4 raws li qhov tseeb ntsuas. Qhov tsis kam ntawm cov roj coke yog siab dua li cov coke metallurgical. Txawm nyob rau ntawm qhov kub thiab txias, nws kuj tseem siab dua li cov coke metallurgical. Ib qho txiaj ntsig tseem ceeb ntawm cov roj coke yog nws qhov ua haujlwm siab. Kev xyaum tau pom tias ferrosilicon smelting siv ib feem ntawm cov roj coke, thiab cov electrode tuaj yeem muab tso rau hauv qhov tob dua, uas tuaj yeem txo qhov kev siv hluav taws xob.
2. Tshuaj muaj pes tsawg leeg
Gas coke muaj tsawg dua cov pa roj carbon ntau thiab ntau cov tshauv, thiab hais txog cov tshuaj lom neeg, nws tsis zoo li coke metallurgical. Qhov no yog vim qhov qis coking kub ntawm cov roj coke. Cov pa roj carbon ntsiab lus ntawm coke roj yog tsawg, yog li thaum siv nws los ua tus neeg sawv cev txo qis, nws yuav tsum tau ntxiv cov pa roj carbon ntau. Nyob rau tib lub sijhawm, vim muaj cov hmoov tshauv siab ntawm cov roj coke, tus nqi ntawm slag hauv smelting nce. Ntawm qhov tod tes, vim cov ntsiab lus ntawm cov pa roj carbon tsawg ntawm coke, nws lub zog txhua yam yog tsawg. Thaum lub sij hawm smelting, feem ntau tsis muaj carbon nyob rau hauv thiab nyob rau hauv lub crucible. Raws li tuaj yeem pom, roj coke yog siv los ua tus neeg sawv cev txo qis hauv ferrosilicon smelting, thiab qhov xwm txheej ntawm lub cub tawg yog qhov nyuaj rau kev tswj xyuas.
3. Porosity thiab Reactivity
Cov porosity ntawm cov roj coke yog 40-60% ntawm cov coke metallurgical. Qhov no tsis yog tsuas yog ua kom muaj zog ntawm cov roj coke, tab sis kuj nthuav cov tshuaj tiv thaiv cheeb tsam. Ntawm qhov tod tes, qhov reactivity ntawm cov roj coke kuj siab dua, uas muaj cov txiaj ntsig zoo ntawm cov tshuaj tiv thaiv.
