Page 23 - Steel Tech India eMagazine Volume January 2024
P. 23

92/     Ć ,668(   Ć -DQXDU\

             ,W FDQ EH VHHQ IURP DERYH WDEOH WKDW RSHUDWLRQDO FRVW RI   &R LQMHFWLRQ   7KXV   WRWDO  LURQ  ORVV  GXH  WR  FROORLGDO
             &R LQMHFWLRQ LV DOPRVW   WLPHV PRUH H[SHQVLYH WKDQ .5   ORVV LV DOPRVW HTXDO IRU ERWK .5 DQG &R LQMHFWLRQ

             Process time                                       E   (QWUDLQPHQW  ORVV   ,W  UHIHUV  WR  LURQ  WKDW  LV
             'XH WR WKH FRQWLQXRXV FRQWDFW RI UHDJHQW ZLWK KRW PHWDO   HQWUDLQHG ZLWK WKH VODJ
             WKURXJK  PHFKDQLFDO  VWLUULQJ  PHFKDQLVP   VHH  )LJXUH      ,Q FDVH RI .5  WKLFNQHVV RI VODJ LV KLJKHU WKDQ WKDW
                 WKH SURFHVV WLPH RI .5 LV VKRUWHU WKDQ WKDW RI &R
             LQMHFWLRQ  7KH OD\RXW RI WKH SODQW ZLWK SURSHU ORFDWLRQ RI   RI &R LQMHFWLRQ  ,W LV HDVLHU WR UHPRYH VODJ RI KLJKHU
             SUH UDNLQJ VWDWLRQ  .5 VWDWLRQ DQG SRVW UDNLQJ VWDWLRQV   WKLFNQHVV  DV D UHVXOW RI ZKLFK WKHUH DUH PXFK OHVVHU
             PDWFKHV YHU\ ZHOO ZLWK WKH %2) F\FOH WLPH             FKDQFHV RI GUDJJLQJ KRW PHWDO  EHORZ WKH OD\HU RI
                                                                   VODJ   GXULQJ  WKH  VODJ  UHPRYDO  SURFHVV   7KXV   LURQ
                                                                   ORVV  LQ  .5  GXH  WR  HQWUDLQPHQW  ORVV  LV  OHVVHU  WKDQ
                                                                   WKDW RI &R LQMHFWLRQ
                                                                Temperature loss

                                                                7KHUH  LV  D  QRWLRQ  ZLWK  WKH  VWHHO  PDNHUV  WKDW  WKH
                                                                WHPSHUDWXUH  ORVV  LQ  .5  LV  VOLJKWO\  PRUH  WKDQ  WKDW  RI
                                                                &R LQMHFWLRQ ZKLFK UHVXOWV LQ LQFUHDVLQJ KRW PHWDO IHHG
                                                                WR WKH FRQYHUWHU DQG LQFXUULQJ PRUH FRVW  +HDW ORVV LQ
                                                                .5  LV  PDLQO\  GXH  WR  FRROLQJ  GRZQ  RI  UHIUDFWRU\  OLQHG
                                                                LPSHOOHU  GXH  WR  WKH  WLPH  LQWHUYDO  EHWZHHQ  WZR  KHDWV
             )LJ     0HFKDQLFDO 6WLUULQJ 0HFKDQLVP RI .5 3URFHVV  7KLV FDQ EH PLQLPL]HG E\ PLQLPL]LQJ LGOH WLPH DW .5
             ,URQ ORVV
                                                                VWDWLRQ DQG E\ HQVXULQJ FRQWLQXRXV IHHG RI KRW PHWDO WR
             ,URQ LV ORVW GXULQJ WKH SURFHVV RI VODJ UHPRYDO ZKLFK LV   WKH .5 VWDWLRQ  3URSHU VHOHFWLRQ RI OD\RXW RI VWHHO PHOW
             GRQH DIWHU GH VXOIXUL]DWLRQ  7KHUH DUH   ZD\V LQ ZKLFK   VKRS DOVR PLQLPL]HV WKH HႇHFW RI WHPSHUDWXUH ORVV
             LURQ LV ORVW  FROORLGDO ORVV DQG HQWUDLQPHQW ORVV DV VKRZQ
             EHORZ LQ )LJXUH                                    Other costs
                                                                2WKHU FRVWV IRU &R LQMHFWLRQ DUH FRVW RI ODQFH DQG FRVW
             D   &ROORLGDO ORVV  ,W UHIHUV WR LURQ WKDW LV HQWUDSSHG
                                                                RI FDUULHU JDV  6LPLODUO\ IRU .5  RWKHU FRVWV DUH FRVW RI
               LQ WKH VODJ
                                                                HOHFWULFLW\ DQG FRVW RI UHIUDFWRU\ IRU LPSHOOHU  ,Q FDVH RI
                .5  JHQHUDWHV  DERXW          PRUH  VODJ  WKDQ  &R   .5  UHIUDFWRU\ OLQHG VWHHO LPSHOOHU LV XVHG ZLWK UHOLQLQJ
               LQMHFWLRQ GXH WR KLJKHU XVDJH RI OLPH LQ WKH SURFHVV    EHLQJ GRQH LQ KRXVH  ,Q FDVH RI &R LQMHFWLRQ  ODQFH LV
               Based  on  various  operational  plants  which  have   D  ERXJKW  RXW  LWHP  DQG  LV  WR  EH  UHSODFHG  FRPSOHWHO\
               .5 LQ RSHUDWLRQ  LW LV VHHQ WKDW WKH DPRXQW RI LURQ   LQFXUULQJ PRUH FRVW
               LQ WKH VODJ LQ WKH .5 SURFHVV LV DERXW     RI WKH
               WRWDO ZHLJKW RI JHQHUDWHG VODJ  7KH FRUUHVSRQGLQJ   +RZHYHU  WKH DERYH FRVWV DUH YHU\ VPDOO FRPSRQHQW RI
               DPRXQW RI LURQ LQ WKH VODJ LV DERXW     LQ FDVH RI   WKH WRWDO FRVW DQG GR QRW FRQWULEXWH VLJQL¿FDQWO\ IRU WKH
                                                                SXUSRVH RI FRPSDULVRQ



















                                              )LJ     &ROORLGDO DQG (QWUDLQPHQW ORVV


             STEEL TECH
   18   19   20   21   22   23   24   25   26   27   28