신규사업
NEW BUSINESS

Refractories for Steel Industry

Products
SN refractories for Tundish
Upper
Nozzle
  • ◦ Slab Caster : Porous material application for anti-clogging to ensure high quality steel
  • ◦ BT/BL Caster : dense Al2O3-C structure for long lifetime
Plate
  • ◦ High abrasion resistance Material
  • - Non-SiO2 type Al2O3-C material
  • - High Ca contained steel : MgO-C material
  • ◦ Dense & homogeneous structure due to high pressure vacuum pressing
Technical Data
Slab Caster BT/BL Caster
Porous U-Nozzle Plate Upper Nozzle Plate
Material base Al2O3-ZrO2-Cr2O3 Al2O3-C
MgO-C 		Al2O3-C MgO-C
Al2O3-C
Lifetime (Heats) 5 ~ 15 5 ~ 15 20 ~ 160 20 ~ 160
ONQC (Open Nozzle Quick Changer) System for Tundish
Nozzle exchange speed < 0.3초
Available bore sizes Ø14 ~ Ø22mm
Weight ≒ 28 kg
Cylinder specifications St. 130, Ø40 x Ø22
Weight : 4.5 kg

Open Casting

QC SEN

SEN Holding

Continuous Casting

CCN Refractory (Continuous Casting Nozzle Refractory)

- A CCN refractory is used to control the flow of molten steel and prevent reoxidation between the ladle and tundish or tundish and mold during continuous casting.

- Typical products include the shroud nozzle, stopper, and submerged entry nozzle (SEN).

Type of Submerged Entry Nozzle
Slab Caster BT / BL Caster
Tube Changer
Type		 Holder Type Stopper Tube Changer
Type		 Holder Type
Figure
Nominal nozzle diameter 80 mm 80 mm 80 mm 30 mm 30 mm
Lifetime 4 ~ 15 Heats 4 ~ 8 Heats 4 ~ 8 Heats 15 ~ 30 Heats 15 ~ 30 Heats
TSG Type P-AQC-125 AZC-125 Stopper P-AQC-90 AZC-90
Slot & Slit Plug

Al₂O₃-Spinel

Al₂O₃-Spinel-Cr₂O₃

200~450 Nℓ/min
Porous Plug

Al₂O₃-Cr₂O₃

100~200 Nℓ/min
Segment Plug

Al₂O₃-Cr₂O₃

200~450 Nℓ/min
Chosun Refractories Taphole Clay history

- Taphole clay has been on sale since 1976 (Pohang Blast Furnace-Blow in 1973)

- Development and supply of taphole clay optimized for the Change of BF Environment



Chosun's Taphole Clay Supply Solution
Step1.
Survey
BF

Trial

- Trial step by Step
- Design with Optimized Materials

Step2.
Stable
Supply

Supply for Operating

- Track Operation condition and Properties
- Regular Visit of Engineer
- Monitoring of Taphole clay Application Suggesting solution based on changes of operating

Step3.
Improving
BF life

Performing Stable Operation

- Designing Proper Materials by BF life
- Expecting Taphole clay’s Quality and expending BF life
- Taphole clay for controlling BF temp. and for securing taphole Length