Lagerung und Transport von HBI

Research output: ThesisMaster's Thesis

Abstract

¿Hot Briquetted Iron¿ (HBI) is produced by direct reduction of iron ore with a subsequent hot briquetting process. The resulting briquettes have a high mass due to their high density (>5000 kg/m3) and relatively large dimensions (approx. 30 × 50 × 110 mm). This results in significant wear of the equipment and particles during transportation, handling and storage. In the course of this master thesis, the fracture, wear and friction behavior of HBI was investigated depending on different energy levels. The subsequent design and simulation of storage silos is based on the results of these tests, with the focus on minimizing particle breakage and thus the resulting fines content. Numerous drop tests with single particles showed a clearly recognizable and mathematically well approximable correlation between drop height and the resulting fine fraction, which was integrated into a fracture model in the following discrete element simulation. The particle breakage can be reduced by minimizing the drop heights at transfer points. The friction between HBI and various wear protection materials was investigated, which revealed large differences depending on the surface condition. Cold and humid ambient conditions have a negative influence on the friction coefficient and increase them drastically. The findings shall be used in the future design of equipment and processes in order to minimize wear of equipment as well as HBI particles.

Details

Translated title of the contributionStorage and Transport of HBI
Original languageGerman
QualificationDipl.-Ing.
Awarding Institution
Supervisors/Advisors
Award date31 Mar 2023
Publication statusPublished - 2023