Exp 1 Flashcards
What is the aim of sieve analysis?
To determine and analyze the size distribution of mixture of granular solids using a test sieve stack and a vibratory shaker.
What are the flow and handling characteristics of granular materials relevant to?
Chemical process industries, particularly in the handling of powders, pellets, crystals, and aggregates.
What does each test sieve consist of?
A woven wire screen with square apertures of known size used for the measurement of particle size.
How is the necessary vibrating motion for sieving imparted?
By a mechanical shaker.
What does particle size specification involve?
Quoting the size of two screens: one through which the particles have passed (Undersize) and the other on which they are retained (Oversize).
What is the primary purpose of sieving in this context?
To measure size spread or particle size distribution of a mixture of particles.
Name the equipment required for sieve analysis.
- Vibratory shaker and sieves (CEN-MKII-13)
- Scales
- Scoop
- Tray
- Ungraded mixed size granular material
- Digital balance
What is the first step in the sieve analysis method?
Note down the diameters of given meshes and initial weight of sample.
How should the nest of sieves be assembled on the vibratory shaker table?
With the coarsest mesh at the top and the finest mesh at the bottom, and a receiver pan below the bottom sieve.
What should be done after transferring the sample to the top sieve?
Cover with a lid and clamp the whole assembly to the shaker by tightening the straps.
For how long should the sieve stack be shaken?
20 minutes.
What should be done after removing each sieve and the receiver pan?
Tip out the contents into the digital balance pan to weigh the amount of material trapped by each sieve.
How should the amount of material retained by each sieve be calculated?
As a percentage of the total sample weight.
In what forms should the results of sieve tests be presented?
Both in tabular and graphical forms.
Fill in the blank: The initial weight of sample material is denoted as M: _____ g.
[initial weight of sample material]
