ACRONI D.O.O., SLOVENIAAOD CONVERTER AND DEDUSTINGSYSTEM

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NEW AOD CONVERTERAND DEDUSTINGSYSTEM

MAIN BENEFITSReduction of production costs• Less expensive charging materials• Lower refractory consumption on EAF & VOD

Acroni d.o.o
Jesenice, Slovenia• Lower energy consumption• Higher yield
Productivity increase• Up to 50% more heats per day due to reduced
tap-to-tap time for stainless steel grades• Process managed in fully automatic mode
• Longer casting sequences especially forstainless steel
Energy & environment• From waste heat recovery possible• Lowest dust emission levels
AOD converter

Acroni d.o.o., a Slovenian steel producer belonging to
the Slovenian Steel Group (SIJ), awarded Primetals
Technologies an order to supply a new 95 metric ton
AOD converter and dedusting system to its steel works inJesenice.
SOLUTION
In the previously existing plant setup the crude steel wasproduced in an electric arc furnace, and decarburized
in a VOD plant with a capacity of 95 metric tons. As theduration of treatment is significantly longer than for carbon
steels, this plant configuration represented a bottleneckin the stainless steel production that has been eliminatedby installing an AOD converter, which increased both theproduction capacity and the flexibility of the steel works.

Dedusting plant

Additional advantages of an AOD converter are the low
degree of slagging of alloying elements and the option ofusing cheaper ferrochromium grades with a higher carbon
content as an alloying addition. The new material handlingsystem for the converter has been integrated into theexisting system.

PLANT DATASCOPE OF SUPPLYAOD Converter• Engineering

Specific reaction volume0.485 m³/t

The scope of Primetals Technologies supply also included
a process automation system specifically designed for
AOD converters. The dedusting system, which has been
installed at the same time as the AOD converter, has not
only ensured that emissions are below the current limits,
but also increased the energy efficiency and occupationalsafety in the production environment.

Oxygen blowing capacity

120 Nm³/min• Advisory services for start-up and commissioning

Charge-to-tap time

80 to 100 min

Electrics and automation

Annual possible AOD
production approx.

349,000 t/y• Basic automation systems

Nominal heat size

95 t

Number of tuyeres

5Duplex (Stainless Steel) or Carbon SteelFlow rate
Clean gas content

ScrapFeCrHC
Nickel• Erection• Training on site

• Process optimization systems, including process models

Dedusting Technology for AOD and material handling
Dry technology• Equipment manufacturing and supply

Pulse jet filter with forced draft
cooler with optional heat recovery
approx. 1,000,000 Am³/h
max. 10 mg/m³• Condition monitoring solutions
With the new advanced stainless steel making facility
Acroni is now able to expand its production of highlyspecialized stainless steel grades and improve its positionon the market.
For more information watch the reference
video.
meta.ls/New-AOD-Converteror spout

optional

Duplex (Stainless Steel)
Triplex (Stainless Steel)Carbon SteelAll Steel Grades

Triplex (Stainless Steel)

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