Green Ball Characterization
2005-09-13
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Green Ball Characterization
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2005-09-13
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University of Minnesota Duluth
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Technical Report
Abstract
The objective of this research project was to correlate the physical quality of green balls with their behavior in the elastic region of the deformation curve under load. An understanding of the parameters that are key to the production of these quality standards will help to improve the quality of their products. Green ball quality is accepted by the industry as one of these key parameters. A procedure to further characterize green balls and develop a relationship to current quality assessment procedures will provide insight to the physical attributes and integrity of the green balls. A digital force gauge and compression test stand interlocked with PC based software was used to collect data and develop the relationship with the deformation of the green ball. Data on
both wet and dried green balls were collected on varied bentonite additions and green ball moisture concentrations. The slope of the deformation curve, in the elastic region, was studied with regards to the green ball drop number, moisture content, wet strength and dry strength. The deformation behavior of the green balls is indirectly proportional to the slope of the deformation curve. As the elasticity of the green ball increases, the dry drop number, wet drop
number and dry compressive strength is reduced. Although no significantly strong relationships are present, it is believed that the relationships to green ball quality, by collecting sufficient data over a period of time, can be significant.
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University of Minnesota Duluth, Natural Resources Research Institute, 5013 Miller Trunk Highway, Duluth, MN 55811-1442; Coleraine Minerals Research Laboratory, One Gayley Avenue, Box 188, Coleraine, MN 55722
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Kiesel, Richard F. (2005). Green Ball Characterization. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/188308.
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