headlined question should be of great interest for most of the steel
mills producing steel by melting scrap in electric arc furnaces.
of arc furnaces have changed in a radical way the recent years and will
do so even in the future due to new developed equipment and process
prices of electrical energy, electrodes, fuel, carbon, oxygen,
refractory, scrap, lime, etc always change from time to time due to
operation technology, new equipment for improving of furnace operation
and energy savings are developed and are proposed by suppliers.
when the market situation changes with dumped market prices it is
important to trim the furnace operation and reduce the conversion costs
of steel in the furnace(s).
follows some important and interesting questions you may have or will
have in the future:
- Do you
change furnace operation and equipment due to trends in the market?
- Is a DC
arc furnace the correct solution for Your local operation conditions?
- Is a
twin shell furnace an intresting option of a new furnace installation?
- Is a
shaft furnace beneficial from energy recovery, production increase and
- Is a
change of furnace shell geometry, i.e. increased shell height and
decreased shell diameter, beneficial?
oxy-fuel burners and/or Coherent Jet burners beneficial and when and how
shall You use the burners in the most efficient way?
- Is post
combustion with excess oxygen beneficial and when and how shall you use
excess oxygen to have an efficient post combustion?
- Is a
new more powerful furnace transformer with series reactor (fixed or
controlled reactance) a beneficial investment?
- Is a
SVC system for voltage stabilisation, power factor correction and
flicker reduction a beneficial investment?
“off-line” pre-heating and pre-cleaning of scrap a beneficial investment?
does new equipment impact the performance of existing auxiliary
equipment like electrical power supply, power factor correction, media
supply (oxygen, fuel, cooling water), furnace hall ventilation and bag
- Are You
sure that all these new technologies and new proposed equipment are good
and will improve operation, will increase production, will reduce energy
consumption and reduce the overall operation costs for your furnace(s)?
computer programs for simulation of the melting process in arc furnaces
are developed to optimise the furnace operation and to see the real
impact of new equipment on furnace operation, production and production
costs, which together with experiences can tell You in advance, whether
proposals from suppliers of new operation technology and epuipment real
will fulfil the proposed guarantees and operation improvements.