R-Zement Pilot plant (planning stage)

Description
The R-Zement pilot plant is part of a project funded by the Baden-Württemberg government. It is under construction and should be commissioned in the second half of 2023.

Its main purpose is the production of an alternative low-carbon belite clinker from secondary raw materials. This belite clinker is to partially substitute Ordinary Portland Cement in new cementitious construction materials. Concrete fines (<4mm) from waste concrete processing, limestone, and flux are used as raw materials. These materials are then dried, ground up and mixed to produce the belite clinker in in an electric rotary kiln operating at 1000°C. After grinding this clinker will be used for application testing by external partners.

The plant will consist of four main process units: big-bag handling facilities, a batch drying cabinet, a batch mill for raw meal and product grinding, and a rotary kiln with indirect electric heating. The overall capacity will be 100kg per day or up to 1t per month of belite clinker.