Page 42 - Steel Tech India eMagazine Volume October 2020
P. 42
81. Ŗ 01 Ŗ 1EVQDGT
are represented D[ VJG HQTOWNC /I1ŧ#N 1 JCXG C
2
EWDKE ET[UVCN UVTWEVWTG CPF CTG UQNKF CV UVGGNOCMKPI
VGORGTCVWTGU +V JCU DGGP UJQYP VJCV /I1 RKEM
up observed in the inclusions can be related to
FKHHGTGPV HCEVQTU EQPVCOKPCVKQP QH CNWOKPWO WUGF HQT
FGQZKFCVKQP TGCEVKQP QH NKSWKF UVGGN YKVJ VJG /I1 TG
HTCEVQTKGU WUGF KP NCFNGU NKPKPI XCRQTK\CVKQP QH /I HTQO
NCFNG UNCIU FWG VQ CTE JGCVKPI CPF UNCI OGVCN TGCEVKQPU
FWTKPI TGſPKPI QRGTCVKQPU
6Q TGFWEG VJG COQWPV QH URKPGN V[RG KPENWUKQPU
IGPGTCVGF EQTTGEVKXG CEVKQPU OWUV DG CRRNKGF
Ŗ 6Q TGFWEG RTQEGUU VKOG 5WNRJWT CPF PKVTQIGP
EQPVGPVU DGHQTG XCEWWO RTQEGUU UJQWNF DG CNKIPGF
YKVJ VJG OCZKOWO CNNQYGF EQPVGPV RGT UVGGN ITCFG
UQ VJG OCKP RTQEGUUGU WPFGT XCEWWO FWTKPI +(
ITCFG RTQFWEVKQP UJQWNF DG ECTDQP TGOQXCN UVGGN Fig. 7: Hydrogen removal pattern for a 160-t heat,
CPF UNCI FGQZKFCVKQP CPF JQOQIGPK\CVKQP together with one sigma data population: inlet versus
outlet hydrogen content (plant A)
Ŗ .CFNG E[ENG OQPKVQTKPI 0GY NCFNGU UJCNN PQV DG +H KV KU PGEGUUCT[ VQ TGFWEG QXGTCNN UVCVKQP FGNKXGT[ VKOG
CRRNKGF HQT +( ITCFGU 6JKU EQTTGEVKXG CEVKQP KU KPVGTXCN DGVYGGP FGNKXGT[ QH VYQ EQPUGEWVKXG NCFNGU
DGPGſEKCN HQT ECTDQP EQPVGPV RKEM WR CU YGNN
HTQO VJG 86& UVCVKQP C őUOCTVŒ XCEWWO UVCVKQP OC[DG
Ŗ $GUV RTQEGUU TQWVG '#( Ō VCRRKPI Ō .CFNG (WTPCEG KPUVCNNGF YKVJ C EWUVQOK\GF UWEVKQP NKPG CPF RWOR
Ō 8CEWWO 6CPM &GICUUKPI %CUV KPI U[UVGO FGUKIPGF VQ JCXG XCEWWO KP DQVJ VCPMU CV VJG
UCOG VKOG YKVJ C UKPING RWOR U[UVGO 6JKU V[RG QH
*[FTQIGP EQPVGPV DGNQY RRO KU GCU[ VQ CEJKGXG YKVJ
XCEWWO VCPM FGICUUKPI 6CTIGV J[ FTQIGP EQPVGPV CV RWOR CPF UWEVKQP NKPG FGUKIP KU CNTGCF[ FGXGN QRGF
VJG GPF QH VJG XCEWWO RTQEGUU KU UGV D[ VJG OCZKOWO CPF CRRNKGF HQT UVCKPNGUU UVGGN RTQFWEVKQP HQT WNVTC NQY
allowed hydrogen content per grade and based on ECTDQP CPF PKVTQIGP UVGGN UWRGT HGTTKVKE ITCFGU 6JG
J[FTQIGP RKEM WR FWTKPI TGUV UVCIG QH UGEQPFCT[ UWEVKQP NKPG KU UGRCTCVGF KPVQ OGFKWO CPF FGGR XCEWWO
OGVCNNWTI[ CPF ECUVKPI RTQEGUU ECWUGF D[ NKOG RCTVU YKVJ VJG RQUUKDKNKV[ VQ JCXG OGFKWO RTGUUWTG KP
CFFKVKQP ECUVKPI UGSWGPEG RGT VWPFKUJ GVE ŗ (KIWTG QPG VCPM CPF FGGR XCEWWO KP CPQVJGT VCPM (KIWTG
UJQYU J[FTQIGP EQPVGPV DGHQTG CPF CHVGT XCEWWO UJQYU VJG TGCN RTGUUWTG KP DQVJ VCPMU CV VJG UCOG VKOG
VCPM FGICUUKPI QPG UKIOC FCVC RQRWNC VKQP VQIGVJGT HQT VYQ EQPUGEWVKXG JGCVU RNCPV &
YKVJ V[RKECN J[FTQIGP TGOQXCN RCVVGTP HQT C JGCV UK\G 9KVJ KPETGCUKPI FGOCPFU HQT JKIJ RGTHQTOKPI CPF CV VJG
QH V UCOG VKOG GHſEKGPV CPF NQY QRGTCV KPI EQUV XCEWWO
FGICUUKPI GSWKROGPV FT[ OGEJCPKECN RWORU JCXG DGGP
#TIQP UVKTTKPI GHſEKGPE[ GZRQUGF UVGGN VQ VJG XCEWWO
UNCI VJKEMPGUU FWTCVKQP QH RWOR FQYP VKOG CPF UNCI EQPſTOGF CU VJG RTQRGT EJQKEG VQ EQORNGVGN[ HWNſNN VJG
VJKEMPGUU VQIGVJGT YKVJ GSWKROGPV FGUKIPGF HQT GZRGEVCVKQPU QH UVGGNOCMKPI EQORCPKGU YQTNFYKFG #U C
RTQRGT UWEVKQP ECRCEKV[ CTG MG[ RCTCOGVGTU TGSWKTGF OCVVGT QH HCEV CJGCF QH VJG TGRNCEGOGPV QH YKFGURTGCF
VQ TGCEJ NQY J[FTQIGP EQPVGPV CV VJG GPF XCEWWO VCPM CPF TGPQYPGF UVGCO GLGEVQT RWORU VGEJPQNQI[ YKVJ
degassing. VGEJPQNQI[ GODQFKGF D[ VJG FT[ OGEJCPKECN XCEWWO
RWORU YGNN GUVCDNKUJGF OGVCNNWTIKECN RGTHQTOCPEGU KP
High Productivity and Quality with a Modern VGTOU QH ECTDQP J[FTQIGP PKVTQIGP 5WNRJWT TGOQXCN
Secondary Metallurgy Station have been repeatedly attained. (KIWTG UJQYU C
#U OGPVKQPGF CDQXG VJG OCKP TGCUQPU VQ JCXG 4* őUOCTVŒ OGEJCPKECN XCEWWO RWOR CRRNKECVKQP UOCTV
FGICUUGT CU RCTV QH CP KPVGITCVGF RNCPV CTG RWOR U[UVGO YKVJ FWCN OCPKHQNFU URGEKCNN[ FGUKIPGF
VQ UGTXG VYQ KPFG RGPFGPV 8& 81& UVCVKQPU Ō XCEWWO
Ŗ 5JQTV VCR VQ VCR VKOG HTQO VJG $1( CPF UNKIJVN[ FGICUUKPI CPF UVCKPNGUU UVGGN RTQEGUU
UJQTVGT ECTDQP TGOQXCN VKOG CV VJG 4* EQORCTGF
YKVJ 86& UVCVKQP Secondary Metallurgy Advanced Process Control
Ŗ *KIJGT RTQRQTVKQP QH WNVTC NQY ECTDQP ITCFGU # OQFGTP 86& UVCVKQP KPUVCNNGF KP CP GNGEVTKE OGNV UJQR
UJQWNF DG GSWKRRGF YKVJ UVCVG QH VJG CTV VGEJPQNQIKGU
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