LADLE FURNACE is employed to heat up, to hold and to finish
all kinds of metal melts.

The main physical principle of an electric arc furnace is
the transfer of energy from electric line to the furnace through heat radiation
and conduction generated by an electric arc.

The Ladle furnace employs two systems namely:

1. Arc Regulatory System- incorporates Marcos, which is a
control system for 3-phase arc furnace.

2. Auxiliary systems- this system includes temperature
control, cooling systems, energy optimization, voltage and current control. The
parameters and process control is commenced by automation systems (PLC based).

The focus of ladle furnace is to keep the molten iron scrap
at constant temperature of 1640.38 degree Celsius.

__CONSTRAINTS:__

- Impurities.
- Distance of electrode from the molten scrap iron.

The distance between the electrodes and molten iron scrap
plays a vital role as only at particular arc length the electrodes produce the
perfect temperature of arc, which is required to maintain the constant
temperature for the molten iron. The arc length depends on the current and
voltage.

Let us now take two extreme conditions of arc length.

1. When the electrodes and the molten scrap iron is on
contact then it carries the maximum
current, as the air resistance is negligible. Therefore it doesn’t give us the
required energy.

2. When there is
infinite gap between the electrode and the molten iron scrap then the resistance becomes infinite and there is
negligible current flowing.

So, we see taking in account of the two extreme conditions
that for optimization of electrode energy we are required to maintain certain
required air gap (arc length).

## No comments:

## Post a Comment

Note: Only a member of this blog may post a comment.