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Guoliang company owns three wholly-owned subsidiaries and one branch. It is a high-tech enterprise specializing in the integrated solution of refractories for high-temperature industry, providing customers with general contracting services and refractory products.
The ladle filler sand is filled with bulk material at the bottom of the ladle. The main varieties are siliceous, magnesia, chromium and forsterite based.
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PRODUCT ADVANTAGES
Good liquidity
High specific gravity
Fast speed strong resistance to steel corrosion
High refractoriness
Easy to produce mild sintering with molten steel, and does not block
TECHNICAL SPECIFICATIONS
|
Index |
TN-YL-1 |
TN-YL-2 |
TN-YL-3 |
|
SiO2 % ≥ |
--- |
46 |
35 |
|
MgO % ≥ |
--- |
-- |
--- |
|
Cr2O3 % ≥ |
--- |
25 |
32 |
|
C % ≥ |
1.0 |
1.0 |
1.0 |
|
Refractoriness ℃ ≥ |
1750 |
1750 |
1750 |
|
Bulk density g/cm3 ≥ |
1.5 |
1.8 |
1.9 |
Before molten steel enters the ladle, filler sand is placed in the ladle well above the slide gate nozzle. During steel holding and secondary refining, the upper layer of the sand is exposed to high temperature and forms a controlled sintered layer.
When the sliding gate is opened, the unsintered filler sand below this layer should flow out smoothly. The molten steel pressure then breaks through the sintered layer and allows steel to flow through the nozzle.
A properly selected ladle well filler sand therefore contributes to:
Reliable free opening is one of the most important performance requirements for steel ladle filler sand.
If the filler sand sinters too strongly, it may become difficult for molten steel to break through the layer when the slide gate opens. If its sintering is insufficient or its structure is unsuitable, molten steel may penetrate deeper into the sand and affect the nozzle area.
The goal is therefore not simply to use a highly refractory material, but to achieve the correct balance between:
Flowability → Controlled Sintering → Steel Penetration Resistance → Easy Breakthrough → Stable Free Opening
This balance is influenced by filler sand composition, particle size distribution, steel temperature, holding time and actual refining conditions.
Different filler sand systems can be selected according to the steel grade, refining process, holding time and operating temperature.
Chromite ladle filler sand is commonly considered for demanding steelmaking conditions because of its high refractoriness and thermal stability. Its formulation can be adjusted to obtain suitable sintering and free-opening characteristics.
Silica ladle filler sand provides good flow characteristics and can be used in suitable steel ladle operating conditions. The silica content and particle distribution should be controlled according to the required sintering behavior.
Magnesia ladle filler sand can be selected for operating environments where basic refractory characteristics and compatibility with particular slag or steelmaking conditions are required.
Forsterite-based formulations provide another option for specific ladle and steelmaking requirements.
The best filler sand should therefore be selected according to actual operating data rather than choosing only by raw material type.
Several factors should be considered when selecting a refractory filler sand for steel ladles.
Different steel compositions can affect the interaction between molten steel and filler sand. Carbon steel, alloy steel and special steel applications may therefore require different formulations.
Higher steel temperatures can increase the degree of filler sand sintering and change opening behavior.
Longer contact between molten steel and filler sand can influence sintering. Ladles undergoing longer LF or secondary refining processes should be evaluated accordingly.
The size and shape of the ladle well, nozzle bore and slide gate system influence the amount and particle characteristics of filler sand required.
When replacing an existing filler sand, buyers should provide their current free-opening performance and any problems such as excessive sintering, nozzle blockage or inconsistent opening.
Even when the same filler sand is used, operating conditions can influence actual performance.
Important factors include:
For this reason, troubleshooting a low ladle free opening rate should consider both the filler sand and the complete ladle operating process.
For consistent performance:
Storage conditions are also important. Ladle filler sand should be kept dry and protected from moisture before use.
GUOLIANG supplies ladle filler sand and steel ladle refractory materials for steelmaking and continuous casting operations. Available products cover different refractory compositions and operating requirements, while technical selection can be based on actual steel grade, temperature, refining time and ladle conditions.
For steel plants experiencing unstable free opening, excessive filler sand sintering or nozzle blockage, operating data can be reviewed together with material selection to identify a more suitable filler sand solution.
Ladle filler sand is a granular refractory material placed inside the ladle well above the sliding gate nozzle. It isolates molten steel from the slide gate system before casting and should discharge when the gate opens to allow molten steel to flow.
In steelmaking applications, terms such as ladle filler sand, ladle well filler sand, nozzle filler sand and slide gate filler sand are often used to describe refractory granular materials used around the ladle well and nozzle opening system.
Common formulations include silica-based, chromite-based, magnesia-based and forsterite-based filler sands. Selection depends on steel grade, temperature, refining conditions and required opening performance.
Free opening means that when the slide gate is opened, the filler sand discharges and molten steel begins flowing through the nozzle without additional manual opening operations.
Possible reasons include excessive sintering, inappropriate material composition, prolonged steel holding time, abnormal temperature, moisture contamination or problems with the ladle well and nozzle system.
Provide the steel grade, ladle size, operating temperature, refining process, holding time and current free-opening performance. These factors are more useful for product selection than considering chemical composition alone.
Send us your steel grade, ladle capacity, operating temperature, refining time and current free opening performance. GUOLIANG can recommend a suitable ladle filler sand grade and provide a quotation according to your steelmaking conditions.Get ladle filler sand Price
If you are interested in any of our products or would like to make your customized order, please feel free to contact us. We are looking forward to establish successful business relations with you.
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