CNC Tundish Lower Nozzle
1.Extend the life of tundish nozzle
2.Improve the quality of metallurgy
3.Flexible: the nozzle diameter can be changed to meet the needs of the ideal casting speed
Products Description
The tundish is an intermediate vessel positioned between the ladle and the mold. Its function is to regulate molten steel flow, allow inclusions to float to the surface, and serve as a buffer and diverter. The bottom nozzle is a refractory nozzle installed at the bottom of the tundish, used to control the flow of molten steel from the tundish to the mold.
Product Parameters
|
Zirconia Inserts |
|||
|
|
CT-PMD1 |
CT-PMD2 |
CT-PMD3 |
|
Physical Properties |
|
|
|
|
Apparent Porosity (%) |
11-12 |
8-10 |
6-8 |
|
Bulk Density (g/cm3) |
≥4.9 |
≥5.2 |
≥5.3 |
|
Chemical Analysis(%) |
|
|
|
|
ZrO + HfO |
≥94.0 |
≥95.5 |
≥96.0 |
|
SiO |
1.1 |
0.23 |
0.5 |
|
TiO2 |
0.2 |
0.2 |
0.1 |
|
Fe2O3 |
0.5 |
0.05 |
0.05 |
|
Al2O3 |
0.4 |
0.42 |
0.1 |
|
CaO |
0.2 |
0.15 |
0.15 |
|
MgO |
2.5 |
2.4 |
2.4 |
|
Na2O |
0.03 |
0.01 |
0.01 |
|
Outside |
|||
|
|
CT-GL1 |
CT-GL2 |
CT-GY1 |
|
Physical Properties |
|
|
|
|
Apparent Porosity (%) |
18-20 |
16-18 |
18-20 |
|
Bulk Density (g/cm3) |
≥2.8 |
≥2.85 |
≥2.9 |
|
Chemical Analysis(%) |
|
|
|
|
Al2O3 |
75 |
82 |
96.5 |
|
TiO2 |
3.0 |
2.5 |
0.1 |
|
Fe2O3 |
1.5 |
1.2 |
0.1 |
|
SiO |
10 |
8 |
0.1 |
|
CaO |
0.2 |
0.1 |
2.5 |
|
MgO |
0.2 |
0.1 |
0.1 |
|
P2O5 |
2.5 |
2.5 |
0.01 |
Method for Replacing Tundish Nozzle
Shutdown: Halt molten steel pouring. Only proceed after residual molten steel in the ladle is drained and temperature drops to a safe range.
Tools: Prepare new nozzle, sealing gasket, refractory mortar, specialized wrench or hydraulic tool, cleaning tools, and thermometer.
Personnel: At least 2-3 personnel must collaborate, with roles assigned for disassembly, cleaning, installation, and verification to prevent errors from single-person operation.
Non-Quick-Change Type: Loosen the fixing bolts and slowly pry the old nozzle with a crowbar, avoiding damage to the ladle bottom refractory layer.
Quick-change type: Unlock using dedicated hydraulic or mechanical mechanisms, then directly extract the old nozzle module without disassembling surrounding fasteners.
Use an air gun to blow away residues and slag from the ladle bottom mounting seat. Clean the sealing surface with a wire brush to ensure no debris or protrusions remain.
Inspect the integrity of the mounting seat refractory layer. Repair any damage first to prevent molten steel leakage.
Apply refractory mortar or install sealing gaskets on the new nozzle's sealing surface to ensure sealing performance.
Manually insert the new nozzle into the mounting seat, ensuring the nozzle center aligns with the crystallizer center (deviation ≤2mm).
For non-quick-change types, evenly tighten bolts. For quick-change types, lock via the mechanism module to prevent loosening.
Use a thermometer to check temperatures around the nozzle. Absence of abnormal heat indicates proper sealing.
Simulate molten steel flow to inspect for leaks or gas penetration.
For quick-change types, test mechanism flexibility to ensure subsequent rapid switching.
our Products
Why Choose Us?
Anyang Changtai Silicon Industry Co., Ltd. maintains a comprehensive product traceability system to ensure product performance meets the highest quality standards stipulated by ISO9001, ISO14001, and SGS guidelines, managed through our rigorous quality control system.
Our zirconia products feature high purity, exceptional high-temperature corrosion resistance, extended service life, and outstanding quality stability. Furthermore, we tailor designs to meet specific customer requirements for diverse operational environments and conditions. Our products are exported to markets worldwide. Click the button below to request a quote!
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