Page 40 - Steel Tech India eMagazine Volume October 2020
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81.     Ŗ 01    Ŗ 1EVQDGT






















            Fig. 2: Sulphur removal during vacuum tank degassing   Fig. 3: Average nitrogen removal under vacuum per
            process (plant A)                                   different Sulphur level (active surface) element before
                                                                vacuum tank degassing process (plant A)

            VJG  OQNVGP  DCVJ  DGEQOGU  C  ETKVKECN  RQKPV   GURGEKCNN[   RCVVGTP   OQNVGP  DCVJ  CIKVCVKQP  NGXGN   KPVKOCVG  OKZKPI
            HQT VJG WNVTC NQY 0 UVGGN UWEJ CU 'ZVTC &GGR &TCYKPI   DGVYGGP UNCI CPF UVGGN KU RWTUWGF  CPF UNCI XQNWOG
            ITCFGU  '&&  QT +( ITCFGU  YJGTG ſPCN 0 NQYGT VJCP   .QYGT  5WNRJWT  EQPVGPV  CV  VJG  GPF  QH  NCFNG  HWTPCEG
               RRO KU KPETGCUKPIN[ KP FGOCPF D[ ſPCN UVGGN WUGTU    RTQEGUU OC[DG CEJKGXGF KP VJG HCUVGUV YC[ D[ CRRN[KPI
            %QORCTGF  YKVJ  VJG  4*  RTQEGUU   VJCPMU  VQ  KPVGPUKXG   RTG HWUGF UNCI  OCKPN[ VJCPMU VQ C NQYGT UNCI OGNVKPI
            EQPVCEV  UVTQPI OKZKPI  DGVYGGP UVGGN CPF UNCI  FWTKPI   RQKPV  CPF  VWPGF  UNCI  EQO RQUKVKQP   9KVJ  KPLGEVKQP  QH
            VJG  XCEWWO  VCPM  FGICUUKPI  RTQEGUU  KV  KU  RQUUKDNG  VQ   RQYFGTGF OCVGTKCN  NKOG  5K%C  KV KU RQUUKDNG VQ TGCEJ
            TGOQXG  5WNRJWT  EQPVGPVU  CU  YGNN   5WNRJWT  TGOQXCN   WNVTC NQY  5WNRJWT  EQPVGPV   DGNQY      RRO   CV  VJG  GPF
            FWTKPI XCEWWO RTQEGUU CPF KORCEV QH 5WNRJWT EQPVGPV   QH NCFNG HWTPCEG RTQEGUU  (KIWTG   UJQYU VJG 5WN RJWT
            KP UVGGN DGHQTG CPF CHVGT XCEWWO QP PKVTQIGP TGOQXCN   TGOQXCN TCVG  RRO RGT OKPWVG  FWTKPI VJG NCFNG HWTPCEG
            OWUV  DG  EQPUKFGTGF  CU  RCTV  QH  VJG  '#(  CRRNKECVKQP    RTQEGUU YKVJ CRRNKECVKQP QH RTG HWUGF UNCI  CPF (KIWTG
            (KIWTG    UJQYU 5WNRJWT TGOQXCN FWTKPI XCEWWO VCPM    UJQYU  VJG  TGUWNVU  QH  RQYFGT  OCVGTKCN  KPLGEVKQP  CU  C
            FGICUUKPI RTQEGUU CPF (KIWTG   UJQYU VJG KORCEV QH   TGUWNV QH 5WNRJWT TGOQXCN
            5WNRJWT EQPVGPV KP UVGGN QP PKVTQIGP TGOQXCN ECRCDKNKV[
                                                                7UG  QH  XCEWWO  VCPM  FGICUUKPI  VQ  RTQFWEG  WNVTC NQY
            5WNRJWT  TGOQXCN  FWTKPI  VJG  NCFNG  HWTPCEG  RTQEGUU  KU   ECTDQP ITCFGU KU CNTGCF[ EQPſTOGF D[ OCP[ CWVJQTU
            EQPVTQNNGF D[  VGORGTCVWTG  VKOG CXCKNCDNG HQT RTQEGUU          +V KU YGNN MPQYP  VJCV FWG VQ FKHHGTGPV FGICUUKPI
            UNCI  DCUKEKV[   QZ[IGP  EQPVGPV  KP  UVGGN   CTIQP  UVKTTKPI























                                                                Fig. 5: Sulphur removal rate with pre-fused slag ap-
            Fig. 4: Sulphur removal with injection of powdered
            material (SiCa) – plant C – Ladle Furnace process   plication (plant B) – Àxed temperature and total process
                                                                time and Àxed Ànal Sulphur content in range of 40 ppm
                                                                – Ladle Furnace process

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