Carson slurries

The Wikon-Thomas method was derived from first principles and does not use empirical correction coefficients. It has proved to be correct for many slurries, but it sometimes overpredicts losses for the Carson slurries (described in Equation 3-52). 

One important probiem about the use of rheometers is that they do not distinguish between Bingham and Carson siurries. This can lead to grave mistakes in the design of a pipehne. Certain slurries have a course of fractions that could also precipitate during a rheometer test. Unfortunateiy, this would give false readings. When there is doubt, the safest approach is to conduct a proper pump test in a loop. 

Want et al. (1982) reviewed the design of a bauxite residue pipeline for Alcoa Australia. The plant disposed 4.75 Mtpy (million tonnes per year) of alumina. Tests conducted on samples confirmed that the rheology of the slurry at concentrations in excess of 45% by weight could be expressed by the Carson equation ... 

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See also in sourсe #XX -- [ , , , ]

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