Cement, Energy and Environment

PROTECTIVE LININGS Hans M. Christensen, Product Manager. Densit a/s, Denmark, All cement plants know that unscheduled shutdowns must be avoided, as they increase production loss and maintenance cost. To ensure a plant is economical wear protection linings are a useful tool in the ongoing battle to keep plants running and at a minimum cost. Reliable wear protection linings are essential for effective maintenance planning and Densit wear protection offers both reliability and long life, less frequent planned maintenance, no unscheduled maintenance and no unexpected leaks. In 1983, Densit a/s a part of FLS Industries began business activities in wear protection of processing parts. On the basis of Densified System containing ultrafine homogeneously arranged Particles (DSP) technology it has developed products special!y designed for wear protection in cement and other industrial plants. Densit can be formed at room tempera ture. It is supplied in powder form, which only has to be mixed with water to achieve the required properties. The inherent brittleness of ceramic materials is overcome by the use of s teel fibres and other steel reinforcements. Densit material is simple to use and demands a minimum of special equipment. Its intrinsic nature means that it is completely jointless, and can be formed into any geometry and enables seamless linings of variable thickness to be installed. The Densit wear protection solution can be u sed in many components and processing parts in a cement plant, which are as follows: • Separators. • Cyclones. • Mills. • Pipes/bends. • Ducts. • Filters. Courtesy: World Cement Apr. 2002, P60, Enquiry no.9 Fax: +44(0)1252718992 E-mail: mail @ worldcement.com Web: www. worldcement.com PROACTIVE PREVENTION Jeff Shel ton and Chris Landers, H;llcyon Technologies, USA A significant problem in dry process .cement plants consists of buildup in the preheater and riser duct areas. This buildup can choke feed pipes and cyclones and greatly affect the performance of the kiln, even to the point of causing unscheduled shutdowns. Historically, attempts to solve this problem have included air cannons, C0 2 explosions (power shots), manual air lances, manual jackhammers, and high pressure water blasting. All of these methods cause damage to the refractory wall and expose the operators to dangerous conditions. These me thods are a reaction to the buildup problem. The PowerClean from Halcyon Technologies is the only system designed to be proactive and prevent the buildup from occurring, and to automatically remove it_ it if it does occur. The system is a cleaning device that combines three different cleaning techniques; high pressure air (in some cases water) drilling, and pushing force. These combine to form an