Zirconium Ramming Material

Zirconium ramming material is an amorphous refractory material manufactured using zircon (ZrSiO₄) or electro-fused zircon-corundum (AZS) as the primary aggregate, combined with binders and additives. It is installed via on-site ramming to form a monolithic furnace lining structure.

Zirconium ramming material features a refractoriness of ≥1700°C and a maximum service temperature range of 1600–1700°C. Upon decomposition, the zircon component generates monoclinic ZrO₂, which further enhances high-temperature stability. The material exhibits excellent resistance to erosion by molten glass, alkaline slags, and non-ferrous metal melts; specifically, the AZS-based variant forms a passivation layer at the glass-melt interface, offering superior resistance to corrosion. Furthermore, the material is easy to install: as an amorphous refractory, it requires only the addition of water and mixing before ramming, making it suitable for complex or irregularly shaped sections. It simplifies repair and maintenance, allowing for the rapid formation of a monolithic refractory layer on-site, thereby reducing the number of brick joints and minimizing the risk of cracking or spalling.

Widely utilized in the glass industry, this material is frequently applied to the bottoms and walls of glass furnace melting tanks, forehearths, and feeder channels, as well as for filling expansion joints and serving as material transition layers within furnaces, thereby resisting erosion by molten glass and extending the furnace's service life. It is also extensively employed in the metallurgical industry as a lining material for steel ladles, the slag lines of LF refining furnaces, RH vacuum degassers, and induction melting furnaces for non-ferrous metals (such as aluminum, copper, and zinc); in these applications, it prevents contamination of the molten metal and resists erosion by molten steel and slag. Additionally, it is suitable for use in the combustion chambers and separators of circulating fluidized bed boilers, the high-temperature transition zones of cement and ceramic kilns, waste incinerators, and high-temperature chemical reactors. In essence, it finds widespread application in the lining of various industrial high-temperature furnaces characterized by extreme heat, severe corrosion, and high abrasion.