3 Selected Definitions paration: . les.
It is a process that involves the separation of particles of desired size from the mixture of various size
rsize: The particles that get remain on screening surface ersize: The material that pass through screening surface powder: It is powder in which all the particles pass through a No. 10 sieve and not more than 40 percent through a • -t4 sieve rately coarse powder: It is powder in which all the particles pass through a No. 22 sieve and not more than 40 percent gh a No. 60 sieve. erately fine powder: It is powder in which all the particles pass through a No. 44 sieve and not more than 40 percent gh a No. 85 sieve. powder: It is powder in which all the particles pass through a No. 85 sieve . . Ilne powder: It is powder in which all the particles pass through a No. 120 sieve h: These are the holes in the screen. h number:
This indicate number of holes included in a length of 1 inch.
perture of screen: It is the clear space between wires of screen opening and it is given in term of mm. reen Number: It is number of meshes in a linear length of 25.4mrn. 'ominal aperture size: It is gap between two adjacent wires. llindred settling: When particles are so close and continuosly collide with each other. This cause pushing of lighter particles by heavy particles.
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