Ferro Alloys

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Ferroalloy refers to various alloys of iron with a high proportion of one or more other element, manganese or silicon for example. It is used in the production of steels and alloys as a raw material.

The main ferroalloys manufactured by us are:

Ferro Silicon (Fe Si ) , Silico Manganese(Si Mn) and Ferro Manganese (Fe Mn) .The chemical composition of these alloys is as follows:

  • Ferro Silicon (Fe Si) : is an alloy of mainly Silicon and Iron with a small percentage of Al, C, Ph.
  • Silico Manganese (Si Mn) : is an alloy of mainly Manganese, Silicon and Iron with a small percentage of C, Ph and Sulphur.
  • Ferro Manganese (Fe Mn) : is an alloy of mainly Manganese and Iron with a small percentage of C, Ph and Sulphur All these Alloys are used in the production of various steels to get the required properties, but the quantities will vary depending upon the type of Steel and generally it is 4 to 16 %

Process

Ferro Alloys are smelted at about 1350 – 1500 deg.C Temperature. This is achieved by a conventional, Open Submerged Electric Arc Furnace. The three Carbon Electrodes, partially submerged in the charge, are supported on hydraulic cylinders for upward and down ward movements to maintain the desired electrical parameters.

The body of the furnace is cylindrical in shape, and is lined with Firebricks, Silicon carbide bricks and Carbon tamping paste. Three tap – holes are provided at 120 degree apart for drawing out both the molten alloy and Slag. During the repair works of one of the tap – holes the other will function as stand by. The Raw materials are conveyed through Conveyors and stored in Day Bunkers. The charge mix is weighed Electronically and it is thoroughly mixed in the proper proportion before being charged through Skip, Telfer hoist and charging chutes into the Furnace. The charge is being pushed near to electrodes on Furnace top by a Charging Stoker manufactured by M/S. Godrej India Ltd. As the charge enters the smelting zone, the alloy formed by chemical reactions of the oxides and the reductants, being heavy, gradually settles at the bottom. At regular intervals the furnace is tapped. The tap hole is opened by Oxygen lancing pipe and after tapping is completed, it is closed by clay plugs.

The liquid Metal and Slag are collected in a Ladle and Slag will be over flowed to sand beds.The Metal being retained in the ladle having a Nozzle at the bottom which allows metal flows on to C.I. Pans. After solidification the cakes are broken manually to required lump size.

All the Ferro Alloys could be produced in the same furnace with minor modifications in Furnace Equipment. Among all Ferro Alloys Ferro Silicon is a Slag free Process.

Quality Policy

Ferro - Silicon

Chemical Composition
  • Si 70 – 75%
  • C 7 – 8%
  • S 0.05%
  • P 0.4%
Physical
  • Size 10 to 50 mm

Silico - Manganese

Chemical Composition
  • Mn 59 – 65%
  • Si 13% -15%
  • C 2% - 3% max HC
  • C 0.3% - 0.5 max LC
  • S & P 0.03% - 0.05%
Physical
  • Size 10 to 50 mm

Ferro - Silicon

Chemical Composition
  • Ferro - Manganese
  • Mn 70 – 75%
  • Si +1.5%
  • C 7 – 8% HC / 0.5 – 0.8% LC / 1.5 – 2.5% MC
  • S 0.05% - 0.08%
  • P 0.4% - 0.6%
Physical
  • Size 10 to 50 mm