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REDUCTION OF SILICA FROM HEMATITE ORE CONCENTRATE PELLETS BY SUPPLEMENTING BENTONITE CLAY WITH STARCH
Date of Award
Campus Access Master's Thesis
Master of Science in Chemical Engineering (MS)
Administrative Home Department
Department of Chemical Engineering
S. Komar Kawatra
Committee Member 1
Committee Member 2
Committee Member 3
The replacement of bentonite as the standard iron ore binder is an important factor in the future of iron processing. Bentonite adds 0.7%-1.0% unwanted silica to the final iron product. Bentonite replacement requires an in-depth understanding of how alternative binders affect the agglomeration process. One such alternative binder is starch, which can be modified in a multitude of ways. It has been observed that the use of a highly soluble starch can greatly increase the dry compressive strength of a hematite concentrate pellet. By heating a starch solution or extruding a starch, its solubility can be altered. When using starch along with bentonite, a suitable pellet can be produced that can withstand all aspects of pellet handling. It was observed that at the highest solubility of starch there was a strength increase of approximately 15 lbf.
McDonald, Jacob, "REDUCTION OF SILICA FROM HEMATITE ORE CONCENTRATE PELLETS BY SUPPLEMENTING BENTONITE CLAY WITH STARCH", Campus Access Master's Thesis, Michigan Technological University, 2017.