Paper Title
Complex Process Flow For Complete Bottom Ash Recycling

Abstract
Bottom ash resulting from coal combustion in coal-fired power plants is a waste material with important recycling potential. However, its complex and contradictory properties limit considerably the applicability of complete recycling procedures. An advanced recycling technique is recovery of carbon from the bottom ash with the purpose of obtaining synthetic graphite. Graphite is a crystalline allotrope of carbon with applicability in many hi-tech industries. As a raw material it is not a renewable resource. Therefore, in the context of increasing demand, synthetic graphite becomes an interesting option. We propose a process flow for obtaining a carbon concentrate that can be used as raw material for graphitization procedure. In order to achieve full recycling of the bottom ash, various secondary waste materials resulting from separation and concentration phases of the process flow must be further processed and sorted in order to ensure properties that guarantee recyclability. We propose a complex process flow that incorporates the graphitization process flow in such way that all secondary waste fractions can be recycled in various directions. Keywords - Bottom ash, Unburned carbon, Recycle, Synthetic graphite