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Particle Size Distribution and Hopper Flow Rates

1966; Elsevier BV; Volume: 55; Issue: 12 Linguagem: Inglês

10.1002/jps.2600551224

1520-6017

Edward D. Sumner, Herman O. Thompson, W. Kenneth Poole, James E. Grizzle,

Heat and Mass Transfer in Porous Media

The rate of flow of varying ratios of four sieve size fractions of rock salt through the hopper of a rotary press was represented by a second degree polynomial equation. This fitted polynomial accounted for 90 per cent of the variation in the mean flow rates. No correlation was found between the tangent of the angle of repose and flow rate. High positive correlation was found between flow rate and bulk density, while high negative correlation between flow rate and porosity was observed. There was no significant increase or decrease in flow rates with regard to the quantity of rock salt remaining in the hopper. The rate of flow of varying ratios of four sieve size fractions of rock salt through the hopper of a rotary press was represented by a second degree polynomial equation. This fitted polynomial accounted for 90 per cent of the variation in the mean flow rates. No correlation was found between the tangent of the angle of repose and flow rate. High positive correlation was found between flow rate and bulk density, while high negative correlation between flow rate and porosity was observed. There was no significant increase or decrease in flow rates with regard to the quantity of rock salt remaining in the hopper.