Hluav taws xob arc rauv txheej txheem melting

1. Hom piv ntawm smelting raw khoom

Cov khoom siv raw ntawm lub tshuab hluav taws xob hluav taws xob tuaj yeem ua rau lub qhov cub tawg molten hlau, hlau slag, sib nqus sib nqus hlau slag, slag steel, steel ntxuav xuab zeb, seem steel, npua hlau, thiab lwm yam. Lub hom phiaj tseem ceeb ntawm smelting yog zom cov ntaub ntawv uas lub induction melting rauv tsis tuaj yeem ua. Qhov zoo ntawm ntau lub cub tawg yog qhov zoo lossis tsis zoo. Nws cuam tshuam ncaj qha rau lub voj voog smelting, smelting nqi, thiab cov txiaj ntsig ntawm cov hlau molten. Yog li ntawd, muaj cov hauv qab no feem ntau yuav tsum tau rau ntau yam ntaub ntawv them nqi:

(1) Cov tshuaj muaj pes tsawg leeg ntawm ntau yam khoom siv yuav tsum meej thiab ruaj khov.

(2) Txhua yam ntawm cov khoom siv hluav taws xob yuav tsum tsis txhob sib xyaw nrog cov ntim ntim, cov khoom tawg, tawg thiab ntub dej kom ntseeg tau tias muaj kev nyab xeeb ntawm kev pub mis thiab yaj.

(3) Txhua yam ntawm cov nqi yuav tsum huv si, tsis muaj xeb, thiab tsis muaj cov khib nyiab, txwv tsis pub nws yuav txo cov nqi hluav taws xob, ua kom lub sij hawm melting, los yog tawg cov electrode. Yog li ntawd, muaj kev sib txuas tseem ceeb heev hauv kev faib ua feem thiab ntxiv cov khoom siv.

(4) Nyob rau hauv cov nqe lus ntawm tag nrho qhov ntev ntawm ntau yam seem hlau thiab slag steel, qhov hla ntu yuav tsum tsis pub tshaj 280cm * 280cm. Nws yuav cuam tshuam rau lub sijhawm pub mis thiab qhov nyuaj ntawm kev pub mis. Loj loj tsis sib xws thiab ze li ntawm lub voj voog yuav yooj yim tawg thiab tawg thaum smelting. electrode.

(5) Batching yog ib feem tseem ceeb ntawm hluav taws xob arc rauv smelting. Seb lub batching yog qhov tsim nyog txaus uas tus neeg teb xov tooj tuaj yeem ua haujlwm smelting ib txwm ua raws li cov txheej txheem yuav tsum tau ua. Cov khoom xyaw tsim nyog tuaj yeem txo lub sijhawm smelting. Ua tib zoo mloog rau cov khoom xyaw: Ua ntej, qhov loj ntawm tus nqi yuav tsum tau muab sib xyaw ua ke kom ua tiav lub hom phiaj ntawm kev teeb tsa zoo thiab nrawm. Qhov thib ob, txhua yam kev them nqi yog siv los ua ke raws li qhov yuav tsum tau ua ntawm cov hlau molten thiab txoj kev smelting. Qhov thib peb yog tias cov khoom xyaw yuav tsum ua raws li cov txheej txheem.

(6) Raws li qhov yuav tsum tau ua ntawm cov khoom sib txuam rau hauv lub qhov cub: hauv qab yog ntom, sab saum toj yog xoob, nruab nrab yog siab, ib puag ncig qis, thiab tsis muaj qhov loj ntawm lub qhov rooj rauv, kom lub qhov dej. tuaj yeem nkag tau sai sai thaum lub sij hawm smelting thiab tsis muaj cov choj tsim.

2. Lub sijhawm yaj

Nyob rau hauv cov txheej txheem hluav taws xob arc rauv smelting, lub sij hawm txij li pib ntawm hluav taws xob mus txog rau thaum tus nqi yog melted kiag li hu ua lub sij hawm melting. Lub sij hawm melting account rau 3/4 ntawm tag nrho cov txheej txheem smelting. Lub luag haujlwm ntawm lub sijhawm melting yog kom yaj sai sai thiab ua kom sov cov nqi nrog kev siv hluav taws xob tsawg tshaj plaws thaum ua kom lub neej ntawm lub cub tawg. Thiab xaiv lub slag nyob rau hauv lub melting lub sij hawm nyob rau hauv thiaj li yuav stabilize lub zoo submerged arc nyhuv ntawm hluav taws xob arc rauv, uas yog ib tug ntawm cov tsim nyog tej yam kev mob rau kev txhim kho lub neej kev pab cuam ntawm lub cub tawg. Nws yog ib qho tsim nyog yuav tsum tau ua kom lub neej kev pab cuam ntawm lub cub tawg. Vim hais tias tus thawj molten hlau yog smelted nyob rau hauv ib tug hluav taws xob arc rauv, nws yog nyob rau hauv ib tug alkaline smelting cua. Txawm hais tias tsis muaj txiv qaub ntxiv thaum lub sij hawm melting, cov nyhuv slag tsim nyob rau hauv lub cub tawg yog zoo dua, thiab cov slag kuj yog me ntsis alkaline (hluav taws xob arc rauv refractories). Cov yam ntxwv kuj yog alkaline). Yog li ntawd, slagging yam tsis muaj txiv qaub muaj me ntsis cuam tshuam rau lub neej kev pab cuam ntawm lub cub tawg. Thaum lub sij hawm melting lub sij hawm, lub arc rauv siv arcing cov ntaub ntawv raws li cov khoom tseem ceeb, thiab oxygen yog siv los ua ib tug pab txhawb cov khoom nyob rau hauv lub txias cheeb tsam nyob ib ncig ntawm lub cub tawg phab ntsa kom luv lub sij hawm melting.

3. Lub sijhawm rov qab los

Lub sij hawm los ntawm qhov kawg ntawm melting mus rau tapping yog lub sij hawm txo. Thaum lub sijhawm txo qis, ntxiv qhov tsim nyog ntawm silicon carbide (cov khoom siv raw 4% -5%) kom tsis txhob tshuab pa oxygen, thiab lub qhov cub lub qhov cub raug kaw, kom qhov chaw zoo txo ​​qis hauv qhov cub los ntawm qhov tsis tshua muaj hluav taws xob thiab siab tam sim no. . Ntev-arc stirring yog tsim los deoxidize thiab txo cov oxides nyob rau hauv lub slag rau saum npoo kom nce yield ntawm alloy. Feem ntau, lub sij hawm txo yog tswj ntawm 10-15 feeb, thiab thaum kawg qhov yuav tsum tau kub yog tswj kom tso cov slag, thiab tag nrho cov txheej txheem smelting tiav.

4. Melting nqi

Tus nqi ntawm smelting raw molten hlau nyob rau hauv hluav taws xob arc furnaces ncaj qha cuam tshuam rau kev siv tus nqi ntawm hluav taws xob arc rauv. Txawm hais tias kev xaiv cov khoom siv raw rau hluav taws xob arc rauv yog dav dua li ntawm induction melting furnaces, tus nqi ntawm cov hlau smelting yuav tsum tau ua ke nrog cov nqi qis. Nqe tsom xam ntawm induction melting rauv thiab hluav taws xob arc rauv, thiab cov khoom siv raw; tsuav yog qhov hluav taws xob arc cub tawg tau zoo sib xws nrog tus nqi sib piv, tag nrho cov nqi yuav qis dua li ntawm induction melting rauv. Raws li tus nqi hluav taws xob tam sim no hauv xeev Shandong, nws kwv yees tias txhua tuj ntawm cov hlau molten tuaj yeem raug txo los ntawm 130 yuan txog.

Los ntawm cov lus saum toj no, nws tuaj yeem pom tias kev siv hluav taws xob zoo ntawm duplex smelting tuaj yeem txuag tau 230Kwh ntawm hluav taws xob, nce mus txog 37% piv nrog induction melting rauv smelting tons ntawm molten hlau. Lub zog ntsuab-txuag nyhuv ntawm cov txheej txheem no yog qhov zoo heev.

5. Kev pab cuam lub neej

Raws li cov yam ntxwv ntawm hluav taws xob arc rauv smelting, lub hnub nyoog ntawm lub cub tawg tuaj yeem ncav cuag lub hnub nyoog ntev. Kev tsom xam tshwj xeeb yog raws li hauv qab no:

(1) Cov nyhuv ntawm qhov kub thiab txias: lub hauv paus ntawm lub qhov cub feem ntau yog qhov kub thiab txias siab tshaj 1600 ℃, thiab nws yuav tsum tiv taus cov cua txias thiab cua sov sai uas yuav ua rau muaj kev puas tsuaj loj rau hauv lub qhov cub; Thaum lub tshuab hluav taws xob arc rauv smelting molten hlau, qhov kub thiab txias feem ntau tswj tau ntawm li 1500 ℃, yog li qhov kev puas tsuaj ntawm qhov kub siab rau hauv lub qhov cub hauv ob sab phlu yog qhov tseem ceeb negligible. Vim yog qhov sib txuam txuas ntxiv ntawm cov hlau molten los tsim cov smelting tsis tu ncua thiab tib lub sijhawm kom ncav cuag 1550 degrees ntawm oxidation oxygen tshuab kub tawm ntawm lub qhov cub, qhov kev pab cuam lub neej ntawm lub qhov cub hauv ob sab phlu tuaj yeem txhim kho zoo heev.

(2) Kev cuam tshuam ntawm cov tshuaj lom neeg muaj pes tsawg leeg: Cov hluav taws xob arc rauv refractories yog alkaline refractory khoom. Qhov sib piv ntawm cov ntaub ntawv raw yog tias cov hlau slag nrog ntau cov alkaline slag, uas ua rau tag nrho cov nqi ntawm lub cub tawg tsis muaj zog alkaline. Cov phab ntsa yaig kuj me me. Lub alkaline smelting ib puag ncig yog qhov tseem ceeb rau kev txhim kho lub neej ntawm lub cub tawg, tab sis cov slag yog tuab heev, uas yuav ua rau thaj tsam ntawm qhov kub thiab txias, uas yuav txo qhov kev pab cuam lub neej ntawm lub cub tawg.

(3) Cov hluav taws xob ntawm lub arc yog tshwm sim los ntawm kev cuam tshuam ntawm cov npuas dej slag submerged arc thaum smelting, uas tuaj yeem ua rau luv luv smelting voj voog ntawm lub cub hluav taws xob. Nyob rau tib lub sijhawm, cov txiaj ntsig zoo submerged arc tuaj yeem txo cov hluav taws xob hluav taws xob rau lub tshuab hluav taws xob hauv ob sab phlu, yog li ua rau lub cub tawg ua rau lub neej ntev.

(4) Kev sib tsoo tshuab thiab kev co kuj yuav cuam tshuam rau lub neej kev pab cuam ntawm lub cub tawg. Tsim nyog txoj kev pub mis yuav ua rau kom lub neej kev pab ntawm lub cub tawg. Kev them nyiaj thiab kev faib tawm yog qhov tsis tsim nyog, lossis cov khoom siv lub tank yog siab dhau, thiab qhov cub hauv qab txoj kab nqes tuaj yeem nqa cov khoom loj thiab hnyav. Kev sib tsoo, kev vibration thiab cuam tshuam rau hauv lub qhov dej, tag nrho cov no txo ​​qis lub neej ntawm lub qhov cub hauv ob sab phlu. Tsis tas li ntawd, raws li cov hluav taws xob arc rauv phab ntsa yog qhov chaw kub, qhov kev them nyiaj tuaj yeem nthuav tawm cov khoom siv rau peb lub ntsiab lus no, uas tseem yuav ua rau lub neej ua haujlwm ntawm lub qhov cub hauv ob sab phlu.

(5) Txoj kev tshuab pa oxygen kuj tseem cuam tshuam rau lub neej kev pab cuam ntawm lub cub tawg. Oxygen ua raws li kev pabcuam arc-pab roj hauv lub tshuab hluav taws xob smelting. Feem ntau, ob sab ntawm lub qhov cub hluav taws xob thiab lub qhov rooj rau qhov cub yog qhov chaw txias, thiab cov electrode yog siv los xa cov khoom siv tshuaj. Lengthened thiab tsim nyog oxygen tshuab cov tswv yim tuaj yeem ua rau luv luv lub voj voog smelting thiab ua rau lub neej ntawm lub cub tawg (raws li cov khoom siv sib txawv, cov khoom siv loj loj raug xaiv rau tshuab, thiab cov nplaim hluav taws xob tsis yog cua tshuab tawm ntawm lub cub tawg hauv qab thiab lub cub tawg phab ntsa kom ntau li ntau tau ), thiab tshuab rau tib lub sijhawm Lub sijhawm oxygen yuav tsum tsis txhob ntev dhau los kom tsis txhob muaj qhov kub thiab txias nyob ze ntawm lub qhov cub phab ntsa thiab yaig ntawm phab ntsa ntawm lub cub tawg.