Page 64 - Steel Tech India eMagazine Volume October 2020

81. Ŗ 01 Ŗ 1EVQDGT

6JG VQVCN HQUUKN HWGN EQUV HQT FKHHGTGPV UEGPCTKQU CTG 7.1. Co-injection of NG and PC at constant coke rate
UJQYP KP 6CDNG +PETGCUKPI VJG 2%+ TCVG QH $( NQYGTU 6JG WRFCVGF $( OQFGN = ? has been used to predict the
EQMG TCVG NGCFKPI VQ NQYGTKPI QH EQMKPI EQCN WUG YJKEJ EQMG TCVG CV C IKXGP 0) CPF 2%+ TCVG EQPUKFGTKPI TCY
FGVGTOKPGU VJG EJCPIG KP VQVCN HQUUKN HWGN EQUV HQT DCUG OCVGTKCN ITCFGU WUGF KP +PFKCP +52U 5VCTVKPI HTQO C
ECUG CV FKHHGTGPV QRGTCVKQP OQFGU #V C RCTVKEWNCT DCUG ECUG QH MI 6*/ 2%+ TCVG YKVJ PQ 0) KPLGEVKQP
QRGTCVKQP OQFG KPETGCUKPI WUG QH 0) NQYGTU RQYGT 0) KPRWV KU KPETGCUGF MGGRKPI VJG GORKTKECN UWO QH
EQCN TGSWKTGOGPV DWV 0) EQUV DGKPI CDQWV VJTGG VKOGU KPLGEVGF 0) CPF 2% EQPUVCPV CV %QPUKFGTKPI C
VJCV QH RQYGT EQCN NGCFU VQ CP QXGTCNN KPETGCUG KP VQVCN EQPUVCPV VQR ICU VGORGTCVWTG QZ[IGP GPTKEJOGPV KU
HQUUKN HWGN EQUV 6JG JKIJGUV VQVCN HQUUKN HWGN EQUV KU CFLWUVGF VQ OCKPVCKP CP CNOQUV EQPUVCPV EQMG TCVG 6JG
QDUGTXGF CV MI 6*/ 2%+ QRGTCVKQP OQFG HQT %CUG %1 UJCHV GHſEKGPE[ KU MGRV ſZGF HQT CNN ECUGU YJGTGCU
EQTTGURQPFKPI VQ OCZKOWO 0) WUG YJKEJ KU +04 H UJCHV GHſEKGPE[ KU EQPUKFGTGF VQ DG JKIJGT HQT 0)
6%5 OQTG VJCP VJG DCUG ECUG 2
KPLGEVKQP ECUGU CU QPG OQNG QH %* IGPGTCVGU VYQ OQNGU
4
Table 7:Total fossil fuel cost for each case at QH * YJKEJ KU C OQTG GHſEKGPV TGFWEVCPV VJCP %1 6JG
2
different operation modes EQPUVCPV OQFGN KPRWV RCTCOGVGTU WUGF CTG ECNKDTCVGF
NWOR[ QTG MI 6*/ RGNNGV MI 6*/ ƀWZ MI
BF-BOF route Total fossil fuel cost (INR/TCS)
operation 6*/ DNCUV VGORGTCVWTG u% DNCUV JWOKFKſECVKQP

mode IO 0O JGCV NQUU ), 6*/ VJGTOCN TGUGTXG
BF PCI rate Case 0 Case 1 Case 2 Case 3 \QPG VGORGTCVWTG u% GSWKNKDTKWO %1 %1
2
(kg/THM) (Base) GSWKNKDTKWO * /H 1 6JG RTGFKEVGF EQMG TCVG 4#(6
2
2
CPF DNCUV XQNWOG CV FKHHGTGPV EQ KPLGEVKQP TCVGU QH 0)
11445.5 CPF 2% CNQPI YKVJ EQTTGURQPFKPI 1 GPTKEJOGPV CTG
given in Table 8. 2

+P IGPGTCN VJG OCLQT GHHGEV CRRGCTU VQ DG TGNGCUG QH Table 8: Model predicted coke rate, RAFT and blast
EQMG QXGP ICU RTQFWEGF KP CNN ECUGU QH 2%+ TCVGU YKVJ volume at different co-injections
OCTIKPCN FGETGCUG QH RNCPV GPGTI[ CPF GOKUUKQPU YJGP
0) KU WUGF DQVJ CU HGGF VQ VJG ICU PGVYQTM CU YGNN O PCI rate NG Coke RAFT Blast
2
enrichment rate volume
CU RQYGT IGPGTCVKQP %QMG QXGP ICU KU C TKEJ UQWTEG
3
QH J[FTQIGP CPF OGVJCPG CPF ECP DG TGCFKN[ WUGF % kg/THM Nm / kg/THM °C Nm / 3
THM THM
HQT TGFWEVKQP QH KTQP QTG YKVJ YKVJQWV TGHQTOKPI YKVJ
OKPKOWO GOKUUKQPU 4GICTFKPI VQVCN EQUV QH HWGN VJG
KPFKECVKXG XCNWGU UJQY VJCV YKVJ VJG CUUWOGF RTKEGU
VJGTG KU C EQUV GUECNCVKQP CU EQORCTGF VQ VJG DCUG 15
cases. 125

7. USE OF NATURAL GAS AS BLAST FURNACE
TUYERE INJECTANT
(TQO 6CDNG KV KU ENGCT VJCV YKVJ KPETGCUKPI 0)
'HHGEV QH 0) KPLGEVKQP KP $( CPF KVU OCVJGOCVKECN KPLGEVKQP VJGTG KU C FGETGCUG KP 4#(6 #V JKIJGT DNCUV
OQFGNNKPI JCU DGGP CVVGORVGF GCTNKGT 'HHGEV QH EQ 1 GPTKEJOGPV KP ECUG QH JKIJGT 0) WUG VJGTG KU CNUQ
= ?
2
KPLGEVKQP QH 0) CPF 2% KP $( JCU CNUQ DGGP UVWFKGF C FGETGCUG KP DNCUV XQNWOG TGSWKTGF RGT WPKV JQV OGVCN
extensively = ? 6JG RTGUGPV UVWF[ CKOU CV CPCN[UKPI RTQFWEVKQP 6JG XQNWOG QH DNCUV KPLGEVGF RGT WPKV VKOG
VJG GHHGEV QH UWDUVKVWVKPI JKIJ 2%+ TCVG QH $( MI TGOCKPKPI VJG UCOG VJG FTKXKPI TCVG QH VJG HWTPCEG
6*/ YKVJ EQ KPLGEVKQP QH 0) CPF 2% YKVJQWV CNVGTKPI KPETGCUGU VJGTGD[ KORTQXKPI RTQFWEVKXKV[ 6JG XCTKCVKQP
VJG EQMG TCVG 6JG OCZKOWO TCVG QH 0) KPLGEVKQP JCU QH RTQFWEVKXKV[ GUVKOCVGF HTQO EJCPIG KP DNCUV XQNWOG
DGGP VCMGP CU 0O 6*/ VQ RTGXGPV HCNNKPI QH CNQPI YKVJ VJCV QH VQVCN KPLGEVCPV EQUV UWO QH 0) CPF

TCEGYC[ CFKCDCVKE ƀCOG VGORGTCVWTG 4#(6 DGNQY 2% EQUV HQT FKHHGTGPV ECUGU QH EQ KPLGEVKQP CTG UJQYP
u% KP (KI

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