Tundish Lining Dry Vibration /Dry Vibration Refractories
2025-11-17
Environmental Friendly Tundish Lining Dry Vibration/Dry Vibration Refractories
1. What are Tundish Dry Vibration Refractories?
Dry vibration refractory refractory refractory refractory materials are monolithic refractory materials applied using mechanical vibration methods, primarily used in the working linings of continuous casting tundishes in the iron and steel metallurgy industry. This material uses magnesia and corundum as main raw materials, achieving non-sintering molding through optimized particle size distribution. It features convenient construction, strong thermal shock stability, and resistance to slag penetration.
2 Optimization ways for Dry Vibration Refractories
Some manufacturers use silicon nitride and boron carbide as composite additives to replace aluminum powder. This effectively avoids the technical problem of excessive bubble formation at high temperatures when using aluminum powder as an additive, leading to excessive porosity in the product and affecting its corrosion resistance. Silicon nitride contains some free iron; a small amount of iron can promote sintering, but excessive iron content leads to the formation of a large amount of low-melting-point material, significantly reducing corrosion resistance. By compounding with boron carbide, physical strength can be improved on the one hand, and low-melting-point material formation can be significantly reduced on the other. By selecting silicon nitride iron and limiting the Si, N content to >90% and Fe, O content to ≤10%, the corrosion resistance of the product formed by the tundish dry vibratory feedstock is improved through effective parameter setting. Compared with using aluminum powder (20,000-30,000 RMB/ton) or Si, N (15,000-20,000 RMB/ton), using silicon nitride iron (7,000-9,000 tons) can reduce the price of the tundish dry vibratory feedstock and improve economic efficiency while ensuring performance.
2) The addition of organic fibers can improve porosity without affecting strength, enhance the thermal insulation performance of the product, and prevent thermal expansion cracking.
3) The addition of sintering accelerators can control the thickness of the sintered layer and improve the strength after high-temperature firing.
4) The addition of silicon nitride and boron carbide also helps to improve the corrosion resistance of the tundish dry vibratory feedstock.
3 . According to industry standards, the indicators of tundish dry vibratory feedstock are as follows:
4 Characteristics of Tundish Dry Vibratory Material
Dry vibratory material is a magnesium powder vibratory material mixed with an organic binder. Under high-temperature baking, the binder binds the magnesium powder into shape, which is then bonded to the permanent layer of the tundish to form the working layer. It has advantages such as not requiring water mixing, rapid baking, good disintegration properties, no contamination of molten steel, and long service life.
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HENAN SINO INDUSTRIAL REFRACTORY NEW MATERIAL CO. LTD
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Mazhai, Zhengzhou, China
Nanlou, Dashiqiao, China
Xinmi, Zhengzhou, China
Samut Sakhon， Thailand
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