US 12,253,309 B2
Rotary kiln and method for burning carbonate-containing material, in particular limestone or dolomite
Carsten Kaczinski, Dortmund (DE)
Assigned to S.A. Lhoist Recherche et Développement, Ottignies-Louvain-la-Neuve (BE)
Appl. No. 18/280,343
Filed by S.A. Lhoist Recherche et Développement, Ottignies-Louvain-la-neuve (BE)
PCT Filed Mar. 7, 2022, PCT No. PCT/EP2022/055696
§ 371(c)(1), (2) Date Sep. 5, 2023,
PCT Pub. No. WO2022/184936, PCT Pub. Date Sep. 9, 2022.
Claims priority of application No. 21161139 (EP), filed on Mar. 5, 2021.
Prior Publication US 2024/0077257 A1, Mar. 7, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F27B 7/16 (2006.01); C04B 2/10 (2006.01)
CPC F27B 7/162 (2013.01) [C04B 2/10 (2013.01); F27B 2007/165 (2013.01); F27M 2003/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotary kiln for burning carbonate-containing material comprising:
a rotary tube comprising:
an inlet end for feeding of material to be burned;
an outlet end for discharging of burned material;
an inlet zone at the inlet end;
an outlet zone at the outlet end; and
a preheating zone and a burning zone arranged between the inlet zone and outlet zone,
wherein a plurality of projections are provided in the inlet zone of the rotary tube, each projection of the plurality of projections having at least one sliding surface inclined to a longitudinal axis of the rotary tube for conveying the material to be burned from the inlet zone into the burning zone, and
wherein the plurality of projections are arranged in a row as a group in such a way that respective sliding surfaces of the projections form a common sliding surface for the material to be burned.