Objective: To To standardize CCM operation Roles and Responsibilities : Responsi ble Account able Consulte d Informed
Mould Operator/Shift Incharge Manager AGM/DGM GM
Location: Pre-reuisites : !afet" Reuirements: 1. only trained person must carry out checks. #. sage of necessary !!"s. $. sage of standard tools C%ec&s to be carried out before castin' ( 1. #heck for the presence presence of o$ygen cylinders. One trolley trolley containing containing %& num'ers num'ers of cylinder must 'e present at ##M area. !ressure of cylinder should 'e 1(&kg/cm(. Spare trolleys t)o num'ers must 'e present at the site .In case same is not there* report it to o$ygen department for the replacement of trolleys. (. #heck for the presence presence of +!G cylinder .,i-e .,i-e num'ers of cylinder cylinder must 'e present. . #heck for the presence presence of cutting torch. torch. Operator )ill )ill light and and check )hether torch is operational or not. . #heck for the )orking )orking of o$ygen o$ygen regulator regulator .!ressure .!ressure of of same should 'e (.%0 kg/cm(. %. Shift in charge /engineer /engineer of ##M )ill )ill check a-aila'ility a-aila'ility of #I cone cone plug & 2& .Minimum 1& num'ers of #I cone must 'e present. 2. #heck for the a-aila'ility a-aila'ility of copper copper cone plug* (0 num'ers must must 'e at site. 3. #heck for the a-aila'ility a-aila'ility of rapeseed rapeseed oil in the tank.(&& tank.(&& litrs of oil must must 'e present. present. Standard rod to 'e kept for measuring le-el. 4. #heck for the a-aila'ility a-aila'ility of casting casting po)der po)der 0 1& 'ags must 'e present present at site. site. 5. #heck #heck for the the a-aila'i a-aila'ility lity of of slag 'ari of 4 mm. 1&.#heck for the a-aila'ility of chillers 0 % kgs minimum must 'e present at site.
11.#heck for the a-aila'ility of slag 'ari 1(.#heck for the a-aila'ility of ,erro silicon 6 1& kgs minimum must 'e present at site. 1.!repare launder and mould 7acket safety co-er ,. #heck for the a-aila'ility of argon cylinder 6 minimum ( num'ers of cylinder on each caster 6 pressure 6 3kg/cm( . Dummy 'ar is put in mould tu'e 'y Skid 'ank operator 8S9O and then packing is done using as'estos sheet .#aster In0 charge informs mould operator that dummy 'ar is inserted in mould and mould operator can prepare machine .Mould operator does sealing 'y application of tundish 'oard and put in mould tu'e and then chiller is put. Shift in charge does the centering of tundish trolley though motor. ,or this he puts rod in the tundish no;;le and ensure that center of tundish and mould is matched. After this hen Slide gate ladle reaches the ##M platform* purging is done using argon. ?emperature is taken of metal in slide gate ladle and same should 'e 121%0 12(% degree # for ##M( and 121&0121% degree # for ##M 1.If temperature is higher than continue purging and if lo)er the return the ladle to the furnace. +adle is opened and )hen tundish le-el is @ th* then tundish no;;le is opened .#ontinuous slag remo-al is done 'y the mould operator. ?ransfer ladle arri-es 6 +e-el of slide gate ladle is checked 'y using lancing pipe. Marking on lance pipe to 'e checked for estimation of metal -olume in the slide gate. If molten metal is less than ? then transfer is done. If -olume in slide gate is more then transfer ladle is kept on hold. >hen metal is transferred completely into slide gate ladle. ?emperature of slide gate is taken .?emperature must 'e 1%4&05& degree. ,/ If more t%en a !urging reuired ' Addition of chiller c Add some pcs of 7am #/ If less t%en a +adle return to furnace 0urin' castin'
>hen le-el is more than half teamer man tells shift in charge to open tundish no;;le. SI# tells mould operator to open tundish no;;le. Mould operator opens all no;;le seuentially. ,itter notices speed meter of casting in case it sho)s some reading he starts secondary cooling )ater. Mould operator then control casting speed using kno'. Mould operator maintains distance of 1%& mm of liuid metal from the top and accordingly he maintains speed. Once dummy 'ar is cut mould operator maintains the speed and remo-es slag 'y using slag 'ari. ?hen gas cutter )ill cut head of 'illet to make it free from dummy 'ar. >hen 'illet reaches meter or 2 meter gas cutter cuts the piece and then S9O pushed same to cooling 'ed from )here 'illet is lifted using crane. Mould Tube replacement after Campai'n ( CCM 1, ( Mould tube to be replaced after 21 %eats. CCM 1# ( Mould tube to be replaced after 311 %eats. Replaced mould s%all be c%ec&ed a'ainst standard parameter. In case it is
4it%in permissible limits it 4ill be reused else it 4ill be discarded
