ThyssenKrupp has patented a method for producing cement clinker using oxygen-containing gas with specific nitrogen and oxygen proportions. The process involves preheating, calcination, firing, cooling, and feeding oxygen gas into the cooler and rotary furnace. The innovation aims to optimize combustion processes and improve efficiency. GlobalData’s report on ThyssenKrupp gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on ThyssenKrupp, Hydrogen fuel cells was a key innovation area identified from patents. ThyssenKrupp's grant share as of January 2024 was 60%. Grant share is based on the ratio of number of grants to total number of patents.

Method for producing cement clinker with oxygen-containing gas

Source: United States Patent and Trademark Office (USPTO). Credit: ThyssenKrupp AG

A recently granted patent (Publication Number: US11878950B2) outlines a method for producing cement clinker that involves preheating a starting material, calcination, firing in a rotary furnace, cooling, and feeding an oxygen-containing gas into a cooler. The method specifies the composition of the oxygen-containing gas, with a proportion of 15% or less nitrogen and at least 50% oxygen. The patent emphasizes the use of oxygen to create an excess at the main burner, with residual amounts entering the calciner for combustion. The method also details the regulation of oxygen and fuel based on combustion temperature and gas volume flows, ensuring efficient production of cement clinker.

Furthermore, the patent describes a plant for producing cement clinker that includes a preheater, calciner, rotary furnace, and clinker cooler. The plant is designed to feed gas streams with over 75% oxygen content into the cooler, with specific configurations for introducing oxygen into the rotary furnace and calciner. The plant's innovative design eliminates the need for tertiary air supply to the calciner or separate means for supplying enriched oxygen, streamlining the production process. Overall, the patent highlights a comprehensive approach to cement clinker production, focusing on oxygen utilization, energy efficiency, and optimized combustion processes to enhance the overall production efficiency and environmental sustainability of cement manufacturing.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.