ZENITH STEEL GROUP, CHANGZHOU,CHINA
10-STRAND BILLET CASTER
MODERNIZATION

primetals.com

10-STRAND
BILLET CASTER
MODERNIZATION

MAIN BENEFITS•• Improved internal quality•• Reduced center porosity

First Single Roll DynaGap (SRD)segments for long product castingmachines

In January 2019 Primetals Technologies was awarded acontract from the Chinese steel producer ZENITH STEELGROUP Co. Ltd. to modernize their 10-strand billet casterlocated in the steelmaking shop #3 at Changzhou.
Primetals Technologies also supplied a bloom caster forbig round casting sections in 2011 and added the new
casting section 280x320 mm in 2016.
Start-up of the modernized billet caster is scheduled forMarch 2020.

•• Reduced center segration•• Improved surface quality•• Increase of productivity
up to 2 million tons per year

SOLUTIONFirst SRD (Single Roll DynaGap) segments for long productcasting machine worldwide with the possibility of soft andhard reduction of 20 mm and limited deviation of final
casting section.
Modification to air-mist spray cooling and thus improved
surface quality.
DynaPhase Online thermodynamic phase transformation
model for calculation of material properties like thermal
enthalpy, thermal conductivity, density and solid fraction.
Dynacs 3D secondary-cooling model capable of calculating
the full 3D strand-temperature profile at any position along
the strand for optimum adjustment of the secondarycooling setpoints and the determination of the point of
final strand solidification.
DynaGap Soft Reduction 3D fully automatic roll-gap
control system allowing dynamic soft and hard reduction
to minimize centerline segregation for improved internal
strand quality.

KJI

4500

HGFCBA

Longitudinal section

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ist nicht gestattet und wird gerichtlich verfolgt.

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ESCOPE OF SUPPLYPLANT DATA•• Roller blocks

Heat size•• Spray headers

16138 tProject

Modification Contents

PlantZenith 10- Strand Bil
SRD- Segment
Billet casting plantArea•• Withdrawal and straightening units (WSU) with
SRD segments
1502

Revision

Customer Doc No.

14131211

Billet caster capacity
10Machine radius
98

2.0 Mtpy
765410 m•• New hardware for complete Level 1

Metallurgical length•• New soft and hard reduction models for billet casters,
like:
DynaPhase
Dynacs 3D and
DynaGap Soft Reduction 3D

Billet sections

160 x 160 mm

Billet lengths

6 – 12 m

Max. casting speed
Steel grades

31 m

2.4 m/mincold heading, gear steel,wire rod, hard steel wire tyrecord, free cutting

Equipment

Subgroup

Drawing NameMaterial No.

Drwg. No.

3

Longitudinal Section

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