Cement, Energy and Environment

). Fig.1: Loading equipment used for raw material transport in cement plants. need to employ additional maintenance measures in this area. This measure of wear protection is often implemented in the plant, but paid for with machine downtime. In order to reduce these downtimes, or if larger areas must be protected, wear plates are a more efficient solution. These wear plates have been coated with the same hard facing material and are manufactured industrially on a large scale. They can be purchased at the exact size and shape required for mounting. This results in cost savings and reduced downtime. Screw conveyors Screw conveyors are used for transporting materials in brick making plants and power plants. They are also used during the Figure 2. Screw conveyor with spiral crown hardfacing. construction of tunnels and for unloading ships. Abrasive, and to a lesser extent, corrosive wears often occur during the transport of these devices. Hardfacing with VAUTID 150 can increase the service life when using the equipment in the ceramic industry, since this hardfacing has a good combination of abrasion and corrosion resisting materials. Here, the edges of the equipment are subject to very heavy wear. An additional hardening layer with VAUTID Rg.3: Screw conveyor with cash iron spiral ULTRA 303, which is produced on a tungsten carbide basis, is recommended as edge protection. Another option would be to manufacture the screw spiral with VAUTID composite plates (can be purchased pre-cut and bent ready for installation). For a larger number of units, VAUTIO-castings are also recommended as a potential solution and are already being used successfully by other manufacturers. This is how the screw spiral is manufactured with iron cast components for an 800 mm dia. screw conveyor system used for 15