Process Sinter plant

main feed sinter plant base mix, consists of iron ore fines, coke fines , flux (lime stone) fines. in addition base mix, coke fines, flux fines, sinter fines, iron dust (collected plant de-dusting system & esp) , plant waste mixed in proportion (by weight) in rotary drum, called mixing , nodulizing drum. calcined lime used binder of mixed material along water (all in particular proportion weight) form feed-sinter of 5 7 mm in size. sinter globules fed sintering machine , burnt there-in produce blast furnace feed sinter.

sintering material

circle cooler cooling hot sinter

material put on sinter machine in 2 layers. bottom layer may vary in thickness 30 75 millimetres (1.2 3.0 in). 12 20 mm sinter fraction used, referred hearth layer. second, covering layer consists of mixed materials, making total bed height of 350 660 millimetres (14 26 in). mixed materials applied drum feeders , roll feeders, distributes nodules in depth throughout sinterring machine . upper layer smoothed using leveler. material, known charge, enters ignition furnace rows of multi-slit burners. in case of 1 plant, first (ignition) zone has eleven burners. next (soaking/annealing) zone typically offers 12 burners. air sucked bottom of bed of mixed material throughout sintering machine. fire penetrates mixed material gradually, until reaches hearth layer. end point of burning called burn through point (btp). hearth layer, nothing sinter in smaller size, restricts sticking of hot sinter pallets. btp achieved in zone of sinter machine, optimize process, means of several temperature measuring instrument placed throughout sinter machine. after completion of burning, mix converts sinter, breaks smaller size sinter breaker. after breaking small sizes, cools down in cooler (linear or circular) means of forced air. @ discharge of sinter cooler, temperature of sinter maintained low, hot sinter can transported conveyor belt made of rubber. necessary precautions taken trace existence of fire in belt , necessary extinguishing done spraying water. product being passed through jaw-crusher, size of sinter further reduced (~ 50 mm) smaller size. complete mixture being passed through 2 screens. smallest sinter fines (< 5 mm) stored in proportioning bins , reused preparing sinter again through mixing , nodulizing drum , fed sinter machine burning. part of smaller 1 ( 5 - 20 mm) used hearth layer in sinter machine , rest taken blast furnace along biggest sized sinters.

the temperature typically maintained between 1,150 , 1,250 °c (2,100 , 2,280 °f) in ignition zone , between 900 , 1000 °c in soaking zone prevent sudden quenching of sintered layer. top 5 mm screens goes conveyor carrying sinter blast furnace and, along blast furnace grade sinter, either goes sinter storage bunkers or bf bunkers. blast furnace-grade sinter consists of particles sized 5 12 mm 20 mm , above.