PRODUCTS
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.
GUOLIANG BOF Sliding Gate Plate is a high-performance functional refractory used in the taphole sliding gate system of basic oxygen furnaces. It is designed to control molten steel discharge during converter tapping and support effective slag retention at the end of the tapping process.
Also known as a Converter Sliding Gate Plate or BOF Taphole Slide Gate Plate, the product must withstand severe thermal shock, high-temperature molten steel erosion, slag corrosion and repeated mechanical sliding.
GUOLIANG provides multiple refractory material systems and customized slide gate plate designs according to converter capacity, taphole dimensions, steel grade and operating conditions.
Share:
PRODUCT ADVANTAGES
Strong thermal shock resistance
Erosion resistance
Good flow controleffect and long service life
TECHNICAL SPECIFICATIONS
|
Products |
Unburned |
Unburned |
Fired at medium temperature (impregnation) |
Fired at high temperature (impregnation) |
||||
|
Materials |
Al2O3-C |
MgO-Al2O3-C |
Al2O3-ZrO2-C |
Al2O3-ZrO2-C |
||||
|
Al2O3 % |
≥ 90 |
≤12 |
≥80 |
≥75 |
≥77 |
≥75 |
≥75 |
≥75 |
|
ZrO2 % |
-- |
--- |
≥4 |
≥8 |
≥4 |
≥6 |
≥6 |
≥8 |
|
C % |
≥ 3 |
≥3 |
≥5 |
≥5 |
≥6 |
≥6 |
≥6 |
≥6 |
|
MgO % |
-- |
≥80 |
--- |
--- |
||||
|
CCS MPa |
≥120 |
≥80 |
≥100 |
≥100 |
≥120 |
≥120 |
≥120 |
≥120 |
|
BD g/cm3 |
≥ 3.05 |
≥2.90 |
≥3.12 |
≥3.12 |
≥3.10 |
≥3.10 |
≥3.12 |
≥3.15 |
|
AP % |
≤ 11 |
≤10 |
≤10 |
≤10 |
≤10 |
≤10 |
≤10 |
≤10 |
During BOF tapping, molten steel flows from the converter through the taphole into the steel ladle. As tapping approaches completion, converter slag may begin to enter the taphole.
The BOF Sliding Gate System enables the tapping opening to be adjusted or rapidly closed, helping control steel discharge and reduce unwanted slag carryover into the ladle.
The sliding gate plate therefore performs several important functions:
Converter slag contains oxidizing components and refining products that should ideally remain in the BOF rather than entering the steel ladle.
Excessive slag carryover can negatively affect downstream refining operations and increase the burden on secondary metallurgy.
A properly operated BOF Taphole Sliding Gate can help stop tapping before excessive slag enters the ladle, supporting cleaner steel transfer and more controlled steelmaking operations.
GUOLIANG provides different refractory compositions according to operating conditions.
Available material systems include:
Different formulations provide different balances of thermal shock resistance, erosion resistance, corrosion resistance and mechanical strength.
The appropriate material should be selected according to converter conditions rather than chemical composition alone.
Alumina-zirconia-carbon sliding gate plates can be selected for demanding BOF tapping applications where strong erosion resistance and structural stability are required.
Zirconia-containing refractory compositions are particularly useful in the critical bore area, which experiences severe high-temperature molten steel flow and rapid wear.
Material composition and zirconia content can be adjusted according to the required application and expected service conditions.
A Converter Sliding Gate Plate operates under multiple simultaneous stresses:
For this reason, BOF slide gate refractory selection should consider the complete operating environment rather than only Al₂O₃ or ZrO₂ content.
Although both products use refractory slide gate technology, their installation locations and process functions are different.
| Factor | BOF Sliding Gate Plate | Ladle Sliding Gate Plate |
|---|---|---|
| Installation | BOF converter taphole | Steel ladle bottom |
| Process stage | Converter tapping | Ladle-to-tundish casting |
| Main function | Tapping and slag control | Steel flow control during casting |
| Flow destination | BOF to steel ladle | Steel ladle to tundish |
| Key concern | Slag carryover and taphole erosion | Stable casting flow and steel protection |
| Operating environment | Converter tapping | Continuous casting |
A BOF Sliding Gate Plate should therefore not be treated simply as another ladle slide gate plate. Its refractory design must match converter tapping conditions and slag-control requirements.
GUOLIANG provides custom BOF Sliding Gate Plates according to existing slide gate systems and customer drawings.
Customization may include:
For replacement projects, customers can provide existing plate drawings, samples or operating data for technical evaluation.
GUOLIANG specializes in refractory materials and functional refractory products for iron and steel production.
Our BOF and EAF refractory solutions are designed according to actual steelmaking conditions, with attention to material selection, product geometry, manufacturing consistency and operating performance.
For sliding gate applications, GUOLIANG can evaluate existing plate specifications, converter tapping conditions and refractory failure patterns to recommend an appropriate product solution.
A BOF Sliding Gate Plate is a functional refractory component installed in the converter taphole sliding gate system to control molten steel discharge during tapping and help limit slag carryover.
A BOF slide gate controls steel tapping from the converter into the ladle, while a ladle slide gate controls molten steel flow from the ladle into the tundish during continuous casting.
Reducing converter slag carryover helps limit unwanted slag entering the ladle and supports more controlled downstream secondary refining.
GUOLIANG supplies Al₂O₃-C, MgO-Al₂O₃-C and Al₂O₃-ZrO₂-C material systems, including different fired and impregnated grades.
Yes. Plate dimensions, bore size, refractory composition and structural design can be customized according to existing converter slide gate systems and customer drawings.
Please provide the slide gate plate drawing or dimensions, bore diameter, converter capacity, operating temperature, steel grades, current service life and required quantity.
Send us your plate drawing, bore size, converter capacity and current service conditions. GUOLIANG can recommend a suitable BOF Sliding Gate Plate material and structure for your tapping system.
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.
Get A Free Quote
