Galvanized steel is a zinc coated steel that is used in many applications including construction and household appliances. The zinc coating provides protection against corrosion. Galvanized steel strips can be produced through a continuous hot-dip galvanizing process in which the steel is immersed in a container of molten zinc.
Prior to the immersion, the steel strip is heated in a roller annealing furnace that is located in front of the galvanizing section. The furnace temperatures are between 650°C and 850°C and the atmosphere is a mixture of hydrogen and nitrogen while the zinc bath is around 400°C.
ZYAROCK® metallurgy roller
The ZYAROCK® metallurgy roller is a ceramic based product used in horizontal continuous heat treatment processes for steel strip such
as silicon steel treatment, galvanizing lines or other various annealing systems. The ZYAROCK® metallurgy roller has been engineered to optimize the conveying of the metal steel strip inside the furnace up to 1100°C improving the surface quality and increasing the line productivity.
ZYAROCK® metallurgy roller benefits
- Increased productivity and easy installation
Due to the outstanding resistance to thermal shock the product can be installed in hot furnaces without preheating and does not require furnace shut down, thus increasing the overall line efficiency.
- Extended life time
No wear on the roller surface even after many changes to different widths of steel strips, resulting in a longer lifetime of the roller. We refurbish the roller by reconditioning the shaft and installing a new ceramic sleeve.
- Cleaner surface
Surface build-up is greatly reduced compared to metal rollers. The high purity fused silica ceramic material used to manufacture the smooth and precise machined ceramic sleeve ensures a long standing performance with clean surface thus increasing production efficiency.
- Engineered solution
Tailored design and years of experience lead to a product that matched highest operating conditions and line speed up to 180 m/min. Depending on operating conditions and care life time of 3 and more years is reached.