The Influence of Tundish Preheating on Tundish Casting Temperature
2026-04-15
中文：中间包预热对中间包开浇温度的影响
English: The Influence of Tundish Preheating on Tundish Casting Temperature
中文：中间包预热是连铸生产前的关键预处理工序，其核心目的是提升中间包内衬温度，减少钢水注入后因衬体吸热导致的温度损耗，进而稳定并保障中间包开浇温度达标。开浇温度的稳定性直接决定钢水流动性、铸坯质量及生产顺行，而中间包预热的效果是控制开浇温度偏差、避免温度过低或波动过大的核心因素，直接关联整个连铸工序的稳定性。
English: Tundish preheating is a key pre-treatment process before continuous casting production. Its core purpose is to increase the temperature of the tundish lining, reduce the temperature loss caused by heat absorption of the lining after molten steel is poured, and then stabilize and ensure that the tundish casting temperature meets the standard. The stability of the casting temperature directly determines the fluidity of molten steel, the quality of cast billets and the smooth progress of production. The effect of tundish preheating is the core factor to control the deviation of casting temperature and avoid excessively low or fluctuating temperature, which is directly related to the stability of the entire continuous casting process.
中文：中间包内衬（耐火材料）在常温状态下，若直接注入高温钢水（1500℃以上），会因巨大的温度差快速吸收钢水热量，导致钢水温度瞬间下降，进而造成开浇温度偏低。而通过科学的预热工序，可实现“提前蓄热”，从根本上减少钢水注入后的热量损耗，其影响机制主要体现在两个方面：
English: When the tundish lining (refractory material) is at room temperature, if high-temperature molten steel (above 1500℃) is directly poured into it, it will quickly absorb the heat of the molten steel due to the huge temperature difference, resulting in an instantaneous drop in the temperature of the molten steel and thus a low casting temperature. Through a scientific preheating process, "advance heat storage" can be achieved, which fundamentally reduces the heat loss after molten steel is poured. Its influence mechanism is mainly reflected in two aspects:
中文：降低衬体与钢水的温差，减少热损耗：预热后的中间包内衬温度提升，与注入钢水的温差缩小，钢水传递给衬体的热量大幅减少，从而降低钢水降温幅度，确保开浇时温度达到工艺要求。常规情况下，未预热的中间包注入钢水后，温度损耗可达30~50℃，而充分预热后，温度损耗可控制在10~20℃，有效保障开浇温度达标。
English: Reduce the temperature difference between the lining and molten steel to decrease heat loss: After preheating, the temperature of the tundish lining increases, the temperature difference with the injected molten steel decreases, and the heat transferred from the molten steel to the lining is greatly reduced, thereby reducing the temperature drop of the molten steel and ensuring that the temperature meets the process requirements during casting. Under normal circumstances, the temperature loss can reach 30~50℃ after molten steel is poured into an unpreheated tundish, while after full preheating, the temperature loss can be controlled within 10~20℃, effectively ensuring that the casting temperature meets the standard.
中文：稳定开浇温度波动，避免局部降温不均：均匀预热可使中间包内衬（包壁、包底、水口区域）温度一致，避免局部衬体温度过低导致钢水局部降温过快，进而防止开浇时钢水温度波动过大，保障钢水平稳注入结晶器，为后续铸坯质量控制奠定基础。
English: Stabilize the fluctuation of casting temperature and avoid uneven local temperature drop: Uniform preheating can make the temperature of the tundish lining (ladle wall, ladle bottom, nozzle area) consistent, avoid excessive local temperature drop of molten steel caused by excessively low local lining temperature, thereby preventing excessive fluctuation of molten steel temperature during casting, ensuring the stable injection of molten steel into the mold, and laying a foundation for the subsequent quality control of cast billets.
中文：预热温度是影响开浇温度的最关键参数，需根据钢种、衬体材质及生产工况确定，常规预热温度控制在800~1100℃。
English: Preheating temperature is the most critical parameter affecting the casting temperature. It needs to be determined according to the steel grade, lining material and production conditions. The conventional preheating temperature is controlled at 800~1100℃.
中文：预热温度达标（符合工艺要求）：衬体充分蓄热，钢水注入后降温幅度可控，开浇温度能稳定在工艺规定范围（如普碳钢1540~1560℃），无需额外升温即可正常开浇，保障生产顺行。
English: Preheating temperature meets the standard (in line with process requirements): The lining fully stores heat, the temperature drop of molten steel after injection is controllable, and the casting temperature can be stably maintained within the process-specified range (such as 1540~1560℃ for plain carbon steel). Normal casting can be carried out without additional temperature increase, ensuring the smooth progress of production.
中文：预热温度过低（低于800℃）：衬体蓄热不足，钢水注入后热量损耗过大，易导致开浇温度偏低，超出工艺允许偏差（通常不允许低于规定值5℃以上），引发钢水流动性变差、水口堵塞、铸坯裂纹等问题。
English: Preheating temperature is too low (below 800℃): Insufficient heat storage of the lining leads to excessive heat loss after molten steel injection, which is likely to cause the casting temperature to be too low, exceeding the allowable process deviation (usually not allowed to be more than 5℃ below the specified value), resulting in problems such as poor fluidity of molten steel, nozzle clogging, and cast billet cracks.
中文：预热温度过高（高于1100℃）：虽能进一步减少钢水降温，但会增加衬体热应力，导致耐火材料剥落、开裂，不仅缩短中间包使用寿命，还可能因衬体脱落混入钢水，影响铸坯质量，同时增加预热能耗，提升生产成本。
English: Preheating temperature is too high (above 1100℃): Although it can further reduce the temperature drop of molten steel, it will increase the thermal stress of the lining, leading to spalling and cracking of the refractory material. This not only shortens the service life of the tundish, but also may cause the lining to fall off and mix into the molten steel, affecting the quality of cast billets. At the same time, it increases preheating energy consumption and production costs.
Previous Page:
Real-time Information
—
2026-04-15
Feedback
Leave a message now, and we will arrange for a specialist to contact you as soon as possible.
HENAN SINO INDUSTRIAL REFRACTORY NEW MATERIAL CO. LTD
Factory Address:
Mazhai, Zhengzhou, China
Nanlou, Dashiqiao, China
Xinmi, Zhengzhou, China
Samut Sakhon， Thailand
Klang ，Malaysia
Copyright © Henan Sino Industrial Refractory New Material Co. Ltd
Privacy Agreement Supports IPV6 SEO
Business License