ArcelorMittal Bremen (Bremen, Germany):

Mehrl J., Manager

Clouth-Gummiwalzen GmbH & Co. KG (Bergheim, Germany):

Beesley R., e-mail: r.beesley@clouth-gummiwalzen.de

Clouth-Gummiwalzen company for several decades is busy in the field of coating of rolls used in steel making. According to the requirements of customers, the company has developed the new material allowing to increase service life of drying rolls at rinsing unit of pickling line. The results of investigation of this new material have been tested at the works of ArcelorMittal Bremen and presented in this paper. Three parameters having influence on rolls service life have been revealed: operating pressure, roll shape and coating material. Qualitative parameters of rolls with different coating (NBR, PU Standard and Clouth Pired), such as wear, elasticity, elongation and strength, are compared. Therefore, Clouth Pired coating has displayed the best results. The conducted experiments allowed to formulate the following recommendations: it is necessary to use the rolls for pickling line only with cylindric barrel; operating pressure should be restricted; NBR-coating is required for rolls operated in acidic media (including sewages, pH < 1) for rising their service life, for other applications Clouth-Pured-coated rolls can be used.