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转炉挡渣球的使用要求
2025-09-02
挡渣球为球形体，原理是利用挡渣球密度介于钢、渣之间(一般为4.2-4.5g/cm3)，在出钢将结束时堵住出钢口以阻断渣流入钢包内。外侧分布流钢槽，以随波逐流方式到达出钢口。
挡渣球使用时的一些重要要求：
1、投放挡渣球的时间与位置如何确定？
在出钢至3/4时，用专用装置将挡渣球从出钢口上方离渣面500㎜处投下，挡渣效果好。
2、挡渣球的使用效果如何评定？
挡渣球的使用效果可以通过观察出钢口钢水的形态来评定，挡渣效果好时，出钢口钢水应呈环形散落流下。此外还可通过下渣颜色来判断。
4、使用后如何评价挡渣球的性能？
挡渣球使用后的效果可以通过钢包内渣层的厚度，以及合金收得率来评定。渣层厚度小，合金收得率高，挡渣效果就好。
3、挡渣球上沟槽的作用何在？如何计算？
挡渣球上沟槽的作用是挡渣球在挡渣过程中便于钢水流出。
沟槽体积计算公式为：V1=槽的面积*槽长=πr2/2*L
5、现场试验需要记录哪些数据？
现场试验需要记录的数据有：出钢温度，挡渣球使用时间，渣层厚度，合金收得率等。
Skimming Slag balls are spherical. Their density is between that of steel and slag (generally 4.2-4.5 g/cm³). They block the taphole at the end of tapping, preventing slag from flowing into the ladle. Flow channels are distributed around the outside of the ladle, allowing the slag to reach the taphole with the flow of slag.
Some important requirements for using slag balls:
1. How to determine the timing and placement of slag balls?
When tapping is about 3/4 of the way through, use a dedicated device to drop the slag balls from above the taphole, 500 mm above the slag surface, for optimal slag blocking.
2. How to evaluate the effectiveness of slag balls?
The effectiveness of slag balls can be assessed by observing the shape of the molten steel at the taphole. Effective slag blocking should occur when the molten steel flows out in a circular pattern. The color of the slag can also be used to determine the effectiveness.
4. How to evaluate the performance of slag balls after use?
The effectiveness of slag balls can be assessed by measuring the thickness of the slag layer in the ladle and the alloy yield. A smaller slag layer thickness results in a higher alloy yield, and thus a better slag retaining effect.
3. What is the purpose of the grooves on the slag retaining ball? How is it calculated?
The grooves on the slag retaining ball facilitate the outflow of molten steel during the slag retaining process.
The formula for calculating the groove volume is: V1 = groove area * groove length = πr²/2 * L
5. What data should be recorded during the field test?
Data required for field testing include: tapping temperature, slag retaining ball usage time, slag layer thickness, and alloy yield.
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