Natural granite stone press rolls for the paper making machine
Granite stone roller
1: Description
The natural granite press roll is an important part for dewatering
on the paper machine. It has the characteristics of smooth surface,
high hardness, high strength, and resistance to acid and alkali.
The surface of the granite roll is smooth, but there are many small
micro holes , Good air permeability, so wet paper is easy to fall
off, which is especially conducive to paper receiving operation. It
is widely used in various paper machines.
2: main parameters
Specifications: 300-1250mm in diameter, 1-5 meters in length.
Models: 787, 1092, 2880, 1575, 1600, 1760, 1880, 2100, 2362, 2400,
2640, 3150, 3600, 3800, 4500.
Compressive strength> = 98.07MPa; hardness HV> 300;
Tensile strength> = 5MPa; Elastic modulus> = 0.4X1000000 kg /
cm2.
Three: matters needing attention
It is advisable to store it indoors to avoid roller cracks due to
temperature changes in the open air, especially in cold regions.
Pay attention to protect the roller surface when loading the truck
to prevent injuries and scratches.
Granite is a non-homogeneous material. It should be balanced in
force during use to avoid vibration and tension.
During use, the temperature rise of the bearings at both ends does
not exceed 40 degrees, to avoid the large temperature difference
between the inside and outside of the roller caused by the
excessive temperature, which may cause cracks on the roller surface
or cause the core shaft and the roller to loosen and affect the
use, especially the copper shaft or Babbitt shaft.
The linear pressure should not exceed 60KN / M (60Kgf / cm) when
used under pressure.
The granite crushing roller end face is marked with a rotation
arrow and must not be inverted during installation.
