Traditional modeling of iron ore pellet strength utilizes micromechanical models such as Rumpf’s equation, which correlate attractive forces and pellet properties into an average expected pellet strength. These models combine with repulsive forces within pellets to predict that pellet strength decreases with the introduction of these forces. However, naïvely applying Rumpf’s equation readily leads to incorrect predictions about the resulting behavior. Pellets created with strong repulsive forces arising from dispersion conditions are observed to be significantly stronger overall than pellets formed in the absence of dispersants. A new model is required to understand and predict the effects of these additives within the iron ore pelletization process. This model can be developed by expanding on the coordination number term within Rumpf’s equation utilizing information from the repulsive forces of dispersants. In particular, pellet strength roughly doubles under dispersion, which is most strongly promoted by anionic polymers.
|Advisor:||Kawatra, S. Komar|
|Commitee:||S., Gowtham, Rogers, Tony|
|School:||Michigan Technological University|
|School Location:||United States -- Michigan|
|Source:||MAI 82/3(E), Masters Abstracts International|
|Subjects:||Chemical engineering, Chemistry|
|Keywords:||Dispersion, Hematite, Pelletization, Surface chemistry|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be