- POSCO developed 'PosLM', a heat insulation facility that can store high-purity molten ferromanganese alloy
- The use of molten alloy instead of solid alloy shortened process time and improved profitability
- Successful commercial production case utilizing synergies out of cooperation among POSCO's technology research institute, steel mills, and affiliates
POSCO succeeded in the world's first commercialization
of high manganese steel production process technology based on molten ferromanganese
POSCO Technical Research Laboratories completed
a commercial production test of "high manganese steel using molten manganese
alloy" and finally transferred the equipment and operations to the Plate
Rolling Department of Gwangyang Works. The steelmaker succeeded in commercializing
it and opened up a new era of high manganese steel production technology by
investing a total of 55 billion won in R&D over four years that began in
The high-manganese production process developed
by POSCO is characterized by the use of PosLM (POSCO Liquid Manganese), a special
hot-air furnace facility capable of storing molten manganese iron.
High manganese steel has been produced by melting
sold manganese iron in the steelmaking process(a process that removes impurities
from molten iron from furnaces and gives the molten iron special properties).
At this time, when the solid manganese alloy iron is injected into a converter(a
large container for storing molten iron), the temperature of the molten iron
is lowered and the temperature of the converter should be increased again. This
fact leads to additional energy costs and extends process time. On top of that,
this process has a disadvantage where refractories in the converter become seriously
worn away as manganese oxide is generated in the process of melting.
POSCO became able to store molten manganese alloy
with PosLM, a special thermal insulation furnace facility that was proprietarily
developed by POSCO, halving the time required for steelmaking in high manganese
steel production. As a result, slab production efficiency for high manganese
steel can be raised more than 10%, thus greatly contributing to profitability.
In addition, by producing high manganese steel
with various properties depending on manganese content, POSCO plans to apply
it to innovative steel products such as cryogenic toughness steel for LNG tanks,
wear-resistant steel for energy transport, and non-magnetic steel for transformer
The commercialization of 'high-manganese steel
production process using molten ferromanganese alloy' is a good example of the
successful completion of the process, jointly achieved by POSCO Technical Research
Laboratories, steel mills and POSCO M-tech, from its planning stage to its design,
operation technology and commercial production. Moreover, the technology has
received the Innovation Award at the 2016 POSCO Family Technology Awards.
Meanwhile, POSCO paved the way for the full-scale
expansion of the high-manganese steel market on March 22 by applying high-manganese
steel of its own development as a material for oil sand slurry pipes of Exxon
Mobil, the world's largest oil company.