GRANITE ROLL MATERIAL AND SURFACE REQUIREMENTS

• Granite has long been used for paper machine press rolls due to its exceptional release properties.
• The use of granite for press roll construction dates back to at least the 1700s and the first granite was probably quarried in Scotland near Aberdeen.
• The intent of this paper is to familiarize mill personnel with the properties of granite and serve as an aid in troubleshooting granite roll problems.
• Granite has relatively low tensile strength, but very high compressive strength. To avoid any stress on the granite during roll application, the granite roll is always pre-compressed by a steel central shaft of tension bars.

It Provides information:

• Material properties.
• Granite roll operation and troubleshooting.
• Rapid profile loss or wear.

It Benefits:

• Researchers.
• Laboratory Personal.
• Chemist.
• Analyst.