An important building material, cement is produced by an energy-intensive process in which large quantities of carbon dioxide are emitted. “At thyssenkrupp we are convinced that CO2-neutral cement production is fundamentally possible and can be achieved in several steps,” says Pablo Hofelich, CEO of the Cement Technologies business unit. “We are already very advanced in many areas on the technology side. We offer our customers products that reduce environmental impact and at the same time reduce costs, making it possible for example to significantly cut CO2 and nitrogen oxide emissions and reduce the use of raw materials, water, or fossil fuels such as coal and gas.”
Under the order, thyssenkrupp is carrying out engineering, procurement, construction and commissioning of the new plant, which will produce 720 tons of activated clay per day. It is the second calcined clay project of Cimpor Global Holdings.
Activated clay significantly reduces CO2 footprint and energy consumption
CO2 is a natural constituent of limestone, the main component of cement. For each ton of cement clinker produced, around 790 kilograms of process-related CO2 is emitted. Around two thirds of this results from the limestone used, which releases CO2 in a chemical reaction in the production process. At the same time the process requires large amounts of energy, because for the production of cement clinker, limestone has to be heated with other aggregates to temperatures of more than 1,400 degrees Celsius.