Optimalizace přesypu odvodněných kalů během redlerové dopravy

Abstract

This thesis deals with the analysis and optimization of chain conveyors (Redler conveyors) designed to transport dewatered sludge generated during the remediation of Cenomanian and Turonian aquifers resulting from historical uranium mining in Stráž pod Ralskem. Specifically, the thesis focuses on the process of neutralizing and decontaminating residual process solutions. The main objective was to combine the experimental determination of the material’s physical properties with a computer simulation of its flow and based on the findings, to propose design modifications to increase the operational reliability of the equipment. During the laboratory phase, key parameters such as moisture content, bulk density, internal and external friction angles, and particle size distribution were determined. These data served as input parameters for calibrating the model in a DEM (Discrete Element Method) environment. Measurements confirmed the high cohesion and stickiness of the conveyed material, which negatively affects the smoothness of the flow. The simulations revealed deficiencies in the geometry of the existing overflow, which cause asymmetric filling of the conveyor and, consequently, uneven loading of the drive chains. The output of this work is a design for an optimized transfer chute, which was subsequently verified by mathematical simulation. This solution contributes to extending the service life of the conveying route and more efficient handling of this specific material. The work provides practical insights applicable to the modernization of conveying systems for handling cohesive materials in industrial operations.