Ceramic Rollers

Our Ceramic Rollers are hi-tech advanced ceramic products made with patented cool isostatic pressing technology, With superior strength in high temperature and excellent performance, Ceramic Rollers has gained very good reputation in the Market.

Application

Ceramic Rollers are widely used in roller kilns for firing of :-

  • Wall Tiles,
  • Floor Tiles,
  • Vitrified Tiles,
  • Sitalll Tiles,
  • Magnetic Materials etc.

Rollers with diameter from Ø 21 mm to 65mm, length up to 4800 mm are available in four types of quality range.

Ceramic Rollers


Ceramic Rollers - VF - 95


Ceramic Rollers - DF - 95


Ceramic Rollers – GF - 95


Ceramic Rollers - GF - 98


Ceramic Rollers - VJ - 95


Rectifying Roller



    USER GUIDE

    How to use the roller affects not only the service life of the roller but also smooth work of the kiln. Generally,we select the type of roller depending on the maximum firing temperature and load of the roller,Meanwhile,the rotate speed,span of roller and atmosphere in the kiln are also important factors for us to consider,as well as the factors of the gas,molten materials and thermal shock. Considering the factors mentioned above,our suggestions are the following
  • Before using the roller,apply protective coating on the surface evenly
  • Place the roller beside or on the kiln for drying. Only after the roller has been dried can it be put into kiln
  • Inserting coated roller to kiln should be completed in a short time,in order to avoid the roller to be heated too long in nonrotating state .
  • Inserting ceramic fibre to both poles at depth 50-60mm
  • Keep the temperature in the kiln at a stable level.Change the new roller whenever any roller broken
  • When the kiln is warmed up to 300-400℃,Please insert the rollers and increase temperature steadily
  • Whenever glaze droplets or alike deposits appear,the roller should be pulled out for cleaning and then applied with new protective coating.
  • While the roller is pulled out from high temperature kiln,its bending should be avoided.Place it to a stand matted with thermal insulating material, rotate it continuously until it cools down to below 600℃,or cover it with thermal insulating blanket.
  • Contact between hot roller and cold metal must be avoided.
  • Don’t use hard tool to knock at roller while cleaning
  • Keep the exhausting fan on and roller rotating after shutting down of kiln,turn off the other fans and prevent cold air coming.after 24 hours,increase the fan speed and take out the roller when the temperature in the kiln is 500℃ or below
  • For the kiln using coal gas,be sure to turn down exhausting fans in time after turning off coal gas and combustion air The operation of the exchange heat fans depends on the pressure in the klin in order to prevent leakage of the cold air and cool the kiln stably
  • Prevent the cold air coming into the kiln when it is cooling, special for the kiln used the heavy oil.Adjust the fan speed to balance the pressure in the kiln in a stable level,and slow air current to cool the klin in a stably
  • Avoid using the roller in the alkali atmosphere and the corrosion of alkali materials in order to prolong the service time of roller

Characteristics Items Types
    VJ95
VF95
DF95
GF95
GF98
Physical
Properties
Bulk Density(g/cm3 2.5-2.7 2.5-2.7 2.5-2.7 2.6-2.9 2.7-3.0
Apparent Porosity (%) 17-22 17-22 15-20 14-18 14-18
Water Absorption(%) 6-8 6-8 6-8 4-6 4-6
Bending Strength(MPa) Indoor Temp
High Temp
45~55 45~55 50~60 55~65 60~70
> 30 > 40 > 40 > 50 > 60
1300℃ 1350℃
Thermal Expansion Coefficient(*10-6/℃)(25~1000℃) 5.7-6.0 5.6-5.9 5.7-6.0 5.6-5.9 5.6-5.9
Thermal Shock Resistance Very good Very good Very good Very good Very good
Max.working Temp.(℃) 1200 1250 1300 1350 1400
Composition Al2O3 (%) 74- 76 74- 76 70-72 70-72 72-74
SiO2 (%) 22-24 22-24 21-23 21-23 17-19
ZrO2 (%) --- --- 4~7 4~7 5~8
Fe2O3 (%) 0.4~0 6 0.4~0 6 0.3~0.4 0.3~0.4 0.2~0.3
Application Roller Kiln    
Glazed Wall Tile    
Glazed floor Tile    
Porcelain Tile
Tableware  
Magnetic Ceramics    
Sitall Tile    
Sanitary Ceramics    
Hi-tech Ceramics      
Specification O.Dφ 21-70mm,Length up to≤ 4800mm
Linearity ≤0.07%*L

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