Today the global raw material markets are more volatile due to oligopolistic market structures in certain areas. The price increases in rare earth elements are dramatic, but price increases in certain often used industrial metals are similar, because the development is influenced by the same market mechanism. Recycling processes that were not economical in the past are pushed today by increasing prices. Steel and cast iron recycling processes in closed loops are already realized today. More complicated processes are necessary, if valuable metals are contained in waste materials in low concentration, because more complex problems need to be solved.