Kiln And Method For Burning Carbonate Rock
Patent No. EP4330614 (titled "Kiln And Method For Burning Carbonate Rock") was filed by Maerz Ofenbau on Apr 25, 2022. The application was issued on Jun 4, 2025.
Patent Summary
A method for firing materials, such as carbonate rocks, in a one- or two-shaft kiln (e.g., PGR or annular shaft furnace) involves material flowing through preheating, burning, and cooling zones. Cooling gas is introduced into the cooling zone, while exhaust gas is discharged via an outlet in or above the preheating zone. This exhaust gas is recirculated into at least one shaft after being partially cooled in a cooling device (optionally following dedusting) and then heated by a heating device (e.g., solar or electric) to $\le$200°C (specifically 50–160°C, preferably 70–120°C). Finally, the gas is heated in a downstream heat exchanger to 400–800°C (particularly 600°C) before introduction into the shaft's preheating or combustion zones.
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Date
Description
EP4330614
- Application Number
- EP22726003A
- Filing Date
- Apr 25, 2022
- Status
- Granted And Under Opposition
- May 2, 2025
- Publication Date
- Jun 4, 2025
- External Links
- Slate, Register , Google Patents