Page 33 - Steel Tech India eMagazine Volume April 2022

VOL. 16 • NO. 3 • April 2022

QSP (Quality Strip Plant) is the technology implemented homogenous microstructure and physical properties
by Danieli in 16 plants.It has two major differences over the length and width of the strip. It also can ensure
from the cSP and these are (1) Vertical curved caster close tolerances on strip thickness, width, profile and
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in place of full vertical caster and (2) Roughing and flatness. QSP is equipped with vertical curved casting
Finishing Mill trains are separated in place of all mill
stands in a single cluster (see Figure 3). strands which allow production of crack sensitive
grades like peritectic steel.
QSP also can consistently produce hot strips with

Fig. 3: Schematic Diagram for a Danieli QSP (earlier known as fTSR or Flexible Thin Slab Rolling)

the first 2.9mtpy Danieli QSP in India is under Figure 4) installation at G-Steel, thailand (recently
construction at NMDC Nagarnar Steel Plant, acquired by Nippon Steel, Japan). The concept of this
chhattishgarh and on completion this plant will be quite QSP is very good and with a coil box separating the
similar to MMK Atakas plant in turkey. roughing mill train from finishing mill train. It can compete

Danieli also developed endless rolling for production with almost all product grades from conventional hSM.
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of hot rolled coils and they named it DUe (Danieli this QSP is equipped with Sumitomo caster, MhI
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Universal endless). One such DUe is in operation in Mill stands and other equipment from SPcO (tunnel
chinaand one under installation in Russia. Furnace, Descaler, crop shear, laminar cooling and
JP Steel Plantech co., Japan has only one QSP (see Delivery section equipment, etc.).

Fig. 4: Schematic Diagram for a JP Steel Plantech Co. (SPCO) QSP

the first endless Strip Plant (eSP) for hRc production With a length of just 180 – 200 meters, the plants also
was developed by Primetals Austria and installed at have considerably more compact dimensions than
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Arcciaieria Arvedi plant, Italy. In this type of plant, the conventional casting and rolling mills like cSP or QSP.
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energy consumption and the associated costs are up line length of a cSP or QSP will vary between 400 to
to 40 percent lower than those of conventional hot strip 450 meters. A wide range of high-quality and ultra-thin
mills or casting and direct rolling processes. this also steel grades can be produced with the endless cast-
means a significant reduction of cO2 emissions. rolling process (Schematic Diagram in Figure 5).

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