KAMDHENU ISPAT LIMITED - Securities and Exchange Board of India

PROCESS
PROCESS FLOW CHART FOR PRODUCTION OF STEEL BARS
Steel Scrap
Induction Furnace
Ingot (Intermediate Product)
Heating Furnace
Roughing Mill
Hot Rolling Process
Bars
Cooling Bed Twisting for HSD & CTD
Bundles Searing Machine
Testing
Bundling & Dispatch
A. HSD/CTD Bars
The main raw material for the Steel Bars is M.S. Ingot. The Company manufactures about thirty five percent of its
raw material in house and remaining is procured from the domestic market
M.S.Ingot:
Sponge iron and Mild Steel Scrap is fed into induction furnace for melting at the temp of 1550 degree Celsius.
Suitable quantity of Ferro Alloys i.e. Ferro Silicon, Ferro manganese aluminum sorts etc are added as per required
chemical composition. The melted scrap is tapped from induction furnace to C.I. Moulds for manufacturing M.S.
Ingot by bottom pouring process. After the solidification of metal the ingot are taken out from C.I. moulds
Cold Twisted Deformed (CTD)/High strength deformed (HSD) Bars:
The Ingot are charged to reheating furnace for further re-rolling process. Ingot are heated at the temp 1200 to 1250
degree Celsius in oil fired reheating furnace. Hot ingot at the temperature of 1200 degree Celsius is taken out from
the furnace through discharge door and is fed through to roughing mill, of 400mm PCD for further size reduction the
red hot steel is passed in different stands of roughing mills intermediate mill, finishing mill to get the bar size from
8mm to 32mm. The finished bars are allowed to cool at ambient temp at cooling bed. After cooling the required
length of 12 meters or 15meters is cut by bundle shearing machine at cooling bed. Further cold twisting is done by
twisting machine to get Cold Twisted Deform (CTD)/High speed deform (HSD) Bars.
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