1. Dab tsi yog qhov poob mechanism?
Feem ntau,Magnesia carbon cibyog ua los ntawm high-zoo magnesia xuab zeb, high-purity graphite, silicon, silicon carbide thiab lwm yam additives, thiab yog nias nrog phenolic resin raws li ib tug binder. Lub hauv paus yuav tsum tau ntawm hluav taws xob rauv rau magnesium carbon bricks yog:
(1) Tsawg thermal conductivity kom ntseeg tau tias tsis tshua muaj cua sov thiab txhim kho thermal efficiency ntawm lub cub hluav taws xob;
(2) Kev tiv thaiv siab rau thermochemical thiab thermophysical yaig coefficients, uas yog, yuav tsum muaj qhov ntim zoo;
(3) Anti-slag, tiv thaiv stripping, tiv thaiv oxidation thiab siab compressive zog, thiaj li kom tau txais tsawg noj thiab siab lub neej.
Thaum ci lub tshuab hluav taws xob tshiab, cov kev cuam tshuam tseem ceeb hauv qab no yuav tshwm sim thaum lub qhov cub hauv ob sab phlu kub txog 750 degree:
MgO(s) + C(s) → → Mg(g) + CO (g)
Mg(g) +Rn0m →MgO ・R "O (m-1)(s)
Cov tshuaj tiv thaiv 1 feem ntau yog kev tsiv teb tsaws ntawm magnesium gas thiab carbon monoxide gas raws lub qhov hws mus rau qhov kub thiab txias. Cov tshuaj tiv thaiv 2 yog tias cov roj magnesium nyob rau ntawm phab ntsa ntawm lub cub tawg yog oxidized dua los ntawm oxides rau magnesium oxide, thiab tsim cov ntsiab lus siab melting point petrographic compound nrog lwm cov kab sib txuas hauv magnesia carbon cib. Yog li ntawd, kev tswj xyuas qhov kub thiab txias ntawm lub cub tawg kom tiv thaiv qhov tshwm sim ntawm cov tshuaj tiv thaiv 1 hauv ntau qhov ntau yog tus yuam sij rau kev tswj lub ntim ruaj khov ntawm magnesium carbon cib. Qhov no tseem ceeb heev txawm nyob rau hauv converters los yog hluav taws xob furnaces. Qhov tshwm sim ncaj qha ntawm qhov cub tsis ua hauj lwm yog qhov tawg ntawm lub qhov cub hauv ob sab phlu los yog qhov txo qis hauv lub neej ntawm lub qhov cub hauv ob sab phlu. Feem ntau cov tuam txhab tsim khoom hauv tsev muaj ntau qhov kev paub thiab cov lus qhia hauv qhov no.
2. Dab tsi yog qhov ua rau yaig?
Thaum lub sij hawm ib txwm smelting, lub qhov cub hauv ob sab phlu yog nyob rau hauv kev sib cuag nrog high-temperature molten steel thiab slag, thiab cov kev ua hauj lwm yog hnyav heev. Cov laj thawj ntawm kev puas tsuaj rau hauv ob sab phlu yog:
(1) Thermal spalling tshwm sim los ntawm arc hluav taws xob thiab tshuaj lom neeg yaig nyob rau hauv lub xeev kub.
(2) Cov nyhuv scouring ntawm slag, molten steel thiab rauv roj rau ntawm lub qhov cub hauv ob sab phlu.
(3) Lub slag ntawm lub cub tawg hauv ob sab phlu Chemical yaig.
(4) Peeling tshwm sim los ntawm kev hloov kub.
(5) Txheej tawg tshwm sim los ntawm decomposition ntawm cov ntxhia muaj pes tsawg leeg ntawm lub qhov cub hauv ob sab phlu cib lawv tus kheej.
(6) Kev cuam tshuam thiab kev cuam tshuam ntawm lub qhov cub hauv ob sab phlu thaum ntxiv cov khoom seem thiab cov hlau molten.
3. Dab tsi yog qhov cuam tshuam rau slag tsis kam?
Magnesia carbon bricks hnov mob nrog slag los tsim cov txheej txheem ntom ntom, thiab lawv cov slag yaig kuj tseem yuav txhim kho. Lub slag yaig tsis kam ntawm cov khoom yog tsis zoo dua li nws oxidation tsis kam. Tom qab siv, lub koom haum cov qauv yuav tsum xoob, thiab cov slag yuav ntxeem tau cov khoom siv sab hauv, ua rau cov txheej cib qub thiab ua kom puas tsuaj tag nrho.
Tom qab nkag siab txog kev puas tsuaj ntawm cov khoom siv refractory ntawm lub tshuab hluav taws xob hauv ob sab phlu, peb tuaj yeem xaiv cov khoom tsim nyog thiab lub neej ntev refractory raws li qhov no. Cov phab ntsa ntawm lub qhov cub hluav taws xob feem ntau yog ua los ntawm cov khoom siv magnesia carbon refractory, thiab lub qhov cub hauv qab ntawm lub qhov cub hluav taws xob feem ntau yog tsim nrog cov ntaub ntawv ramming, feem ntau magnesium calcium qhuav ramming cov ntaub ntawv, thiab yuav tsum muaj cov yam ntxwv ntawm sintering ceev, tsim cov khoom. txheej txheej ua haujlwm, muaj peev xwm tiv thaiv slag nkag mus rau qhov siab tshaj plaws thiab ua kom cov khoom sib sib zog nqus xoob xoob.
