As cement is the most widely consumed building product in the world, a huge volume is produced. Cement production is responsible for about 8% of man-made CO2-emissions. The International Energy Agency (IEA) has highlighted four principal CO2 reduction levers.
Future green cements will be produced from less clinker; and the clinker will be produced with new technologies releasing less and at someday zero CO2. Cement suppliers will be challenged to maintain consistent clinker reactivity at a lower CaCO3 content in the raw materials and with fuels emitting less CO2.
The use of calcined clay in cement production has been around for decades, but the method has been attracting increased attention in recent years due to the associated environmental benefits. A key contributing factor to the delay in widespread commercial uptake has been the pursuit of an adequate color control strategy to minimize the reddish hue that can be present in calcined clays, to instead retain the traditional ‘cement grey’ coloring.
The consequences of failing to control fugitive materials include unplanned downtime, excessive cleaning costs, regulatory actions, poor public relations and safety incidents. Addressing the issues with workable long-term solutions improves availability, housekeeping and safety, ultimately enhancing the company’s cash flow.
The utilisation of recycled gypsum is becoming even more important with the upcoming loss of FGD gypsum. While RC gypsum (mainly from recycled gypsum plasterboard) is already being used in some cases for plasterboard, its use for other gypsum products is almost unresearched. Research results on a RC gypsum plaster will be presented.
In the global push towards net-zero emissions, optimizing the use of coal combustion residuals (CCR) is crucial. Repurposing coal ash, a byproduct of thermal power plants, within the cement industry offers both environmental and economic benefits.
The cement industry still earns a huge amount of money. But it is getting more difficult to make money with cement because of the industry’s carbon footprint and the necessity for a transition to a green industry.
Planeteers, a Hamburg-based Climate Tech startup, is pioneering ocean alkalinity enhancement (OAE) for carbon dioxide removal and decarbonisation of hard-to-abate industries, such as lime or cement.
To support the initiative of becoming a climate neutral economy and thus contribute to strengthening the competitiveness of German industry, Open Grid Europe GmbH (OGE) presents a CO2 pipeline infrastructure for Germany.
stela Laxhuber Trocknungstechnik regularly trains its engineering team in the respective fields of application. For some years now, the drying of alternative fuels (AF) and refuse derived fuels (RDF) has been increasingly in focus, and not just in the cement industry.
