Pulley lagging model selection in cement plant

Part I: Drive pulley of mine conveyor line

The cement plant is divided into mine, powder workshop and clinker workshop. The application environment of conveyors in different working conditions is very different. A reasonable choice of pulley lagging model can not only save costs, but also improve production efficiency. 

Many conveyors in mine have a length of more than 3 kilometers, the conveying capacity is also more than 1,200 tons/hour, and the belt speed is more than 3 meters/second. The type of pulley lagging must be able to meet the requirements of this working condition.

The mine conveyor line is also the lifeline of the cement plant. The pulley lagging should have the characteristics of high safety and quick replacement, which can allow the conveyor to achieve less downtime and improve production efficiency. In addition, limestone with a diameter of 8-15 cm may fall into the non-working surface of the conveyor belt. The pulley lagging on bend pulley and tail pulley also need the ability to prevent damage.

Ceramic SLIDE® lagging is our first choice for drive pulley of mine conveyor lines. The 8mm thick high wear-resistant ceramic sheet can ensure a 5-8 service years of the pulley lagging, and the replacement frequency of the pulley lagging is greatly reduced.

In general cold bonding lagging construction process, it takes 16 hours to replace the pulley lagging on a D1200*L1800 pulley, plus need a curing time of ≥8 hours. However, the first installation of the Ceramic SLIDE® lagging only takes 16 hours, and no additional curing time is required. The second replacement can be completed within 8 hours. Greatly reduce downtime and increase production efficiency. 

In addition, the hardness of the ceramic is as high as ≥9T, which can resist the damage from the limestone and effectively protect the pulley surface from damage.

In our practical research, it has been found that the cold bonding glue opening problems on heavy conveyor lines are usually caused by insufficient curing time and failure in meeting the installation requirements. When the pulley lagging is in contact with the conveyor belt, the huge pressure brought by the conveyor belt will cause The rubber lagging squeezed and deformed, which is a huge test for the adhesives. DCCD® engineers optimized the Ceramic SLIDE® lagging. For the 4mm thickness rubber layer between the ceramic and the metal plate, this part is in contact with the adhesive. DCCD® choose neoprene rubber with the highest viscosity. The rubber hardness was increased to Shore 80A. By reducing the rubber deformation rate and enhancing the bonding strength, the pulley lagging glue opening is reduced when the pressure of the conveyor belt is applied, and the safety of the pulley lagging is assured.