Ziel des Forschungsvorhabens war es, den Einfluss von Nebenoxiden aus Brennstoffaschen auf die Bildungstemperaturen der Klinkerschmelze und auf die damit verbundene Klinkermineralogie herauszuarbeiten. Ebenso sollten die Auswirkungen der verringerten Prozesstemperatur und der veränderten Eigenschaften der Klinkerschmelze auf die notwendige Bildung von Coatingschichten sowie die Feuerfestkorrosion und damit auf die Haltbarkeit der feuerfesten Zustellung in der Sinterzone des Drehrohrofens aufgeklärt werden.

The future of concrete recycling is taking shape here: through the targeted sequestration of CO₂ in demolition concrete, the project is investigating an innovative approach to improving the separation of aggregate and cement stone during demolition. The optimized separation of aggregate and hardened cement paste enables the recovery of valuable secondary materials and, thus, makes an important contribution to strengthening the circular economy in the construction sector in order to achieve sustainability goals.

As plans are progressing for the CCUS infrastructure for transporting, storing and using CO₂, it is becoming increasingly clear that the separated CO₂ must be very pure in order to be used or stored. CC technologies are currently being planned with considerable engineering effort and electricity consumption for gas cleaning systems to separate unwanted accompanying substances. This is where this project comes in. It aims to investigate an innovative concept that could significantly reduce this effort.

Precise material balances and up-to-date transfer factors are essential for evaluating trace element emissions in cement clinker production. Outdated data makes it difficult to use modern, CO₂-neutral raw materials and fuels. The project aims to update the transfer factors to support industry, the environment and climate protection.

In this advanced seminar, you will look at the current challenges facing cement chemistry in terms of resource efficiency and climate neutrality. The focus will be on the use of alternative raw materials and fuels in clinker production. You will learn about the origin, composition and properties of these materials and understand their influence on the clinker burning process. You will also be introduced to modern methods of clinker analysis to assess the effect of alternative raw materials and fuels on cement properties. Finally, you will discuss the hydration behaviour of complex composite cements and quality assurance methods in a practical way.

This online seminar equips you with the knowledge and tools needed to systematically evaluate CO₂ capture technologies applied to industrial processes such as the clinker burning process. You will be introduced to the key benchmarking methodology and will learn how to assess technical performance, economic feasibility, and site-specific applicability in a structured way. Through practical examples and case studies, you will see how data-driven benchmarking can support informed decision-making on the path toward climate-neutral production.

In this training you will become familiar with all relevant aspects concerning the use of alternative fuels in cement plants. Starting with the main political drivers such as the circular economy and the European waste fuel strategy, you will get a detailed insight into the current state-of-the-art-situation with regard to the use of alternative fuels in the EU. In this context, pre-treatment and suitable quality control of alternative fuels will be also explained and presented to you. You will focus on all the relevant aspects of the use of alternative fuels in the burning process (e.g. drivers and barriers of their use, available process technology and latest developments) and discuss them in the sessions. You will acquire knowledge about technical feasibility and optimisation potential, and have the possibility to discuss case studies.

The 9ᵗʰ International VDZ Congress took place in Düsseldorf on 6 – 8 November 2024. The VDZ Congress is the international scientific forum for the cement industry and its suppliers. Delegates from all over the world discuss the latest developments concerning the transformation of the industry on its way towards climate neutrality.