Influence of continuous casting refractories on pure steel and its development

In recent years, the performance requirements of steel is getting higher and higher. The higher the cleanliness of steel, alumina brick the better the performance. Steel impurity content reaches a certain level, the performance of steel will be a qualitative change. Steel oxygen, sulfur, phosphorus, hydrogen, nitrogen content of the five elements should be as low as possible. At present, the sum of the harmful elements coil grout [C, S, P, N, H, TO] in clean steel (IF steel and pipeline steel, etc.) produced at home and abroad advanced process can be controlled below 100 × 10-6, Some scholars have proposed the concept of ultra-clean steel, and defined as inclusions [C, S, P, N, H, TO] and the sum of 40 × 10-6 the following. Clean steel production is inseparable from the hot metal pretreatment, converter decarburization, refining and other secondary refining process optimization and control, and is also closely related to the use of refractory material, refined molten steel is likely to be continuous casting refractory pollution, Oxygen, nitrogen, hydrogen and other elements, so in the production of clean steel, refractory used in the study and reasonable choice is very important.
Continuous casting refractories Ladle Permeable Brick in clean steel production of molten steel in the carbon, nitrogen has a significant impact, the correct selection can be adsorbed molten steel sulfur, phosphorus inclusions, the purification of molten steel. In the production of clean steel should be selected alkaline, especially calcium refractories ladle slide gate, should adopt carbon-free, silicon-free or low-carbon low-silicon material. Metallurgical workers and the future direction of research refractories, refractories are continuous casting with functional, longevity and environmental protection.