|
|
 |
| |
|
 |
|
|
|
CARBON INJECTION: Carbon injection in EAF is now a
day adopted world wide .In this process the carbon
particles are pressurized in a vessel through dry
compressed air and injected into the bath .With this
practices following benefits are achieved. By injecting
carbon on oxidized slag CO2 formation takes place
.Evolution of CO2 bubbles makes the slag foamy and as a
result submerged arching takes place which in turns gives
better energy utilization. Oxidizing slag erodes the
furnace refractory and thus by calculated injection of
carbon the O2 level of slag can be maintained to the
desired extent to achieved good life of furnace
refractory. The formation of CO2 is is an exothermic
reaction, which liberate good amount of heat energy .Thus
by these post combustion process the good source of energy
getting wasted as CO is converted to CO2 in the bath
itself. With all the above benefits the carbon injection
has become popular practice in primary steel making
through EAF.
|
|
OXYGEN LANCING : In EAF oxidizing period of steel
making is carried out in which oxygen is blown in the
Furnace .In the conventional method of lancing oxygen is
blown manually , which is costly and time taking process.
With this process the possibility of boiling in the
furnace is more due to formation of differential carbon
layer through sallow blowing .To over come this method of
lancing with supersonic lance has become a common
practice. In this process lancing is done through a
specially designed lance which ejects O2 at a velocity of
app. 1.5 Mach (i.e 1.5 times velocity of sound .) With
this the oxygen is penetrated 700MW deep into the bath
which avoids formation of differential carbon layer and
50NM3 oxygen can be blown safely into the furnace.
Major benefits :
Reduces oxygen blowing time .
Avoid boiling in furnace due to differential carbon
layer.
Easy and safe in operation
Cost effective as less consumables are required .
|
|
| |
|
|
|
