Steel Shots & Grits

The overall process requires duration of approximately ten to Ten hours inside the kiln, during which iron ore is optimally reduced and discharged to a rotary cooler for cooling below 120°C., before coming out into the finished product circuit.

Samples of Cast Iron Scrap and cutting from rolling mills or scrap from user units is taken from raw materials storage. This is then tested for its chemical composition and noted. Before preparation of charge necessary ingredients like Ferro Alloys, Sponge Iron, Scrap etc. are added by weight. Charge is taken up in bucket and by means of Hoist/Skip charger, charge is put into Furnace. Charge is retained in Furnace for calculated time which causes the melting of charge. As Soon as the molten pool is formed very pronounced stirring action in the molten metal takes place which helps in accelerating the melting. Deoxidising agents and sometimes specific alloying elements are also added at suitable intervals during melting.

Melting of homogeneous mass occurs at 1200’C. If necessary superheating up to 1650-C. is done from specific time. After completion of melting cycle of an hour the homogeneous mass is poured into the bottom pouring laddle and carried to the shots making machine where it is poured into the rotating mechanism to form round spherical STEEL shots ranging from 0.425 dia to 2.50 mm dia. The shots are then removed from the water granulation tank and dired in a Rotary Dryer to segregate the different sizes and the over size shots are taken to the crushing sector for manufacture of CI/ Steel Grits.

The different sizes of STEEL shots are then dried in a Rotary Dryer/Furnace and for annealing carried to another set of Rotary furnace.

The product is again passed through Auto Riddles with stainless steel sieves to assure correct sizes.