Consumption mechanism ntawm graphite electrode nyob rau hauv hluav taws xob rauv steelmaking txheej txheem

Raws li cov khoom siv hluav taws xob hauv hluav taws xob arc rauv smelting, kev noj ntawm graphite electrodes yog proportional rau kev siv hluav taws xob. Niaj hnub nimno hluav taws xob arc rauv steelmaking siv hluav taws xob thiab tshuaj lub zog raws li thermal zog qhov chaw kom ua tiav cov hom phiaj ntawm plaub qhov kev txo qis (P, C, O, S), ob qhov txo qis (gas, impurities), thiab ob qhov kev hloov kho (kub, muaj pes tsawg leeg) hauv steelmaking txheej txheem. Qhov kev ua tau zoo ntawm graphite electrodes yog qhov tseem ceeb hauv lawv qhov kev tsim nyog thiab kev siv ntawm cov neeg siv, thiab kev siv cov electrodes ncaj qha cuam tshuam rau lawv tus kheej zoo. Kev siv graphite electrodes hauv hluav taws xob arc rauv smelting feem ntau muaj cov hauv qab no.
1. Kev siv cov graphite electrode kawg thiab txheej ncig sab hauv lub qhov cub hluav taws xob

Lub arc generated los ntawm graphite electrodes nyob rau hauv hluav taws xob arc rauv yuav muab faib mus rau hauv ntev, nruab nrab, thiab luv arcs, thaum lub melting ntawm furnace cov ntaub ntawv thiab kub nce nyob rau hauv lub arc zog. Qhov ntev arc yog ncaj qha proportional rau qhov nruab nrab voltage thiab inversely proportional rau theem nrab tam sim no thiab cua sov tus nqi. Txhawm rau kom luv luv lub sijhawm smelting thiab txhim kho cov smelting ceev, cov tshuaj siv hluav taws xob siab ua haujlwm ntawm kev quab yuam oxygen tshuab tau txais, uas tso siab dua cov kev xav tau ntawm oxidation tsis kam thiab thermal poob siab ntawm graphite electrodes. Qhov kawg noj ntawm graphite electrodes nyob rau hauv smelting muaj xws li sublimation generated thaum lub sij hawm kub arc thiab tshuaj lom neeg tshwm sim generated thaum lub sij hawm sib cuag nrog molten steel thiab steel slag. oxidation poob ntawm graphite electrodes account rau li 2/3 ntawm tag nrho cov noj, uas yog cov khoom ntawm chav tsev oxidation tus nqi thiab cheeb tsam thiab yog proportional rau lub sij hawm. Lub sij hawm cua sov nyob rau hauv smelting ntev dua, qhov kev noj ntau dua. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau nruab ib lub tshuab dej txias rau ntawm cov electrodes ntawm hluav taws xob arc furnaces. Nyob rau hauv ib txwm smelting, cov ntsiab lus carbon ntawm graphite electrodes nkag mus rau hauv cov hlau molten feem ntau nyob ib ncig ntawm 0.01%, thiab nws yog ib txwm rau qhov kawg noj hloov mus rau ib tug tsis conical zoo.
2. Residual noj ntawm graphite electrodes generated thaum smelting

Residual noj yog hais txog qhov tsis muaj txiaj ntsig ntawm cov khoom siv hluav taws xob qis tshaj plaws hauv smelting, uas poob rau hauv qhov cub vim qee qhov laj thawj thiab dhau los ua cov khoom pov tseg zaum kawg, tawm hauv cov txheej txheem ntau lawm. Lub cim ntawm cov khoom seem tsis yog tsuas yog cuam tshuam rau qhov zoo ntawm cov pob qij txha thiab cov electrodes, tab sis kuj muaj feem cuam tshuam ncaj qha rau cov khoom xws li kev faib cov ntaub hauv qhov cub, cua hauv qhov cub, thiab lub zog xa hluav taws xob. Lub ntsiab tshwm sim yog: muaj "tib neeg" zoo li cov kab nrib pleb thiab loj longitudinal los yog splitting kab nrib pleb nyob rau hauv qab ntawm lub residual lub cev; Qhov kev sib txuas tsis nruj txaus, ua rau kev sib koom ua ke oxidize thiab poob los yog tawg ua ntej; Kev sib txuas tsis nyob hauv qhov chaw lossis qhov haum tsis zoo, ua rau muaj kev sib tsoo lossis tawg; Cov electrode tawg nyob rau hauv qab ntawm qhov sib koom los yog lub qhov vim yog sab nraud quab yuam; Cov electrode yog raug rau sab nraud quab yuam, ua rau cov pob qij txha los yog qhov tawg; Kev faib khoom tsis raug rau hauv lub cub tawg tuaj yeem ua rau thaj tsam loj ntawm cov khoom tawg tom qab dhau los ntawm qhov dej, lossis kev ua haujlwm tsis raug ntawm lub zog xa hluav taws xob tuaj yeem ua rau muaj kev puas tsuaj loj heev; Cov electrode nws tus kheej muaj qhov tsis zoo, thiab lwm yam ntawm qhov kev poob no tsis yog qhov tseem ceeb hauv kev tsim khoom ib txwm muaj thaum ua kom ntseeg tau qhov zoo ntawm cov electrode, tab sis cov neeg siv ncaj qha muab qhov tseem ceeb rau nws.