Chemical Engineering November 2021 - 7

Blast-furnace technology aims for carbon neutrality
(London,
P
rimetals Technologies,
Ltd.
U.K.;
www.primetals.com) and thyssenkrupp AG
(Essen, Germany; www.thyssenkrupp.com)
have signed an exclusive, worldwide coopRO-3066I
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eration agreement that sees both parties commit to
bringing the Sequence Impulse
Process (SIP) technology to the
market. The SIP technology has
been developed by thyssenkrupp
AT.PRO tec GmbH, a company
of thyssenkrupp Materials Services
GmbH (www.thyssenkruppmaterials-services.com),
and is
well established for use in foundry
cupola furnaces. The underlying
principles of this proven technology
have been adapted and
specifically tailored to the blast-furnace process. To
prove the technology, thyssenkrupp Steel Europe has
installed the first ever full system on their blast furnace
#1 at Schwelgern, Duisburg in Germany (photo).
Blast-furnace operators can conventionally lower
operating costs through injection of alternative fuels
with the hot-air blast (most commonly pulverized coal)
in order to reduce the required coke rate in the burden.
Additional O2 enrichment is required to promote
combustion for the added fuel. While benefiting the
economic aspects for the furnace, this also results in
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a number of process and operational challenges. Combustion
of the fuel localized in the raceway entry leads
to higher heat loads on the shell, and uncombusted
material (char) can accumulate in the burden. This impedes
gas flow and drainage, ultimately reducing the
furnace performance efficiency.
The patented SIP technology
acts to repurpose the enrichment
O2, and deliver a series of controlled,
high-energy pulses, increasing
local concentration in the
raceway. The resulting action is
improved combustion and conversion
of fuel, leading to better gas
distribution and drainage potential.
Additionally, through higher
penetration of the oxygen, the
Thyssenkrupp
heat load generated is moved more to the central
zone of the furnace. The small coke proportion in the
burden can be increased without loss of permeability
or increased overall pressure drop. These conditions
permit an increase in the replacement of coke with injectant
and higher production potential while avoiding
deterioration of the process conditions.
" By optimizing the consumption of the reducing agents
coke and coal, we have a major lever for efficiency improvements,
cost and CO2 savings, " says Jörg Glebe,
managing director of thyssenkrupp AT.PRO tec.
Scan to learn more.
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM
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NOVEMBER 2021
7

http://www.primetals.com http://www.thyssenkrupp.com http://www.thyssenkrupp-materials-services.com http://www.thyssenkrupp-materials-services.com http://adlinks.chemengonline.com/80075-03 http://WWW.CHEMENGONLINE.COM

Chemical Engineering November 2021

Table of Contents for the Digital Edition of Chemical Engineering November 2021