What is Kick law?
The amount of energy required to crush a given quantity of material to a specified fraction of its original size is the same no matter what the original size.
What is Kick’s law equation?
which, on integration gives: E = KKfc loge(L1/L2) (11.2) Equation (11.2) is a statement of Kick’s Law. It implies that the specific energy required to crush a material, for example from 10 cm down to 5 cm, is the same as the energy required to crush the same material from 5 mm to 2.5 mm.
Which of the following equation is rittinger’s law?
Correct Answer: ratio of feed opening to discharge opening.
What is meant by crushing efficiency?
Crushing efficiency : It is defined as the ratio of surface energy created by crushing during crushing to the energy absorbed by the solid . This crushing efficiency is constant and for a given machine and material , is independent of the sizes of the feed and product .
What are the factors affecting Sizereduction?
Size reduction is influenced by various factors. These include various physical properties like moisture content, hardness, stickiness, toughness, slipperiness, abrasiveness etc.
Which mode of size reduction is used by jaw crusher?
Size reduction in jaw crushers occurs mainly by a compression mechanism and to lower extent by impact. While in a jaw crusher breaking of feed lumps takes place mainly by compression, some crushers operate on an impact principle.
What are the laws governing size reduction?
It may not be well known, but there are three physical laws that describe the energy required for size reduction. They are the Bond’s Law, Rittinger’s Law, and Kick’s Law. Rittinger’s Law — The energy required for reduction in particle size of a solid is directly proportional to the increase in surface area.
Is there any limit for particle size reduction?
In other words, the force required to split a particle by crushing rises as its size reduces, tending to infinity at some small but finite diameter. This comminution limit is a real effect, encountered in the crushing and grinding of particles. It represents a lower limit on the sizes of particles that can be produced.
What do you mean by size separation?
Size separation is a unit operation that involves the separation of a mixture of various size particles into two or more portions by means of screening surfaces. Size separation is also known as sieving, sifting, screening.
Which is the correct definition of kick’s law?
Kick’s law. The law that the energy needed to crush a solid material to a specified fraction of its original size is the same, regardless of the original size of the feed material. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
What is the goal of the derivative kick project?
The goal is to eliminate a phenomenon known as “Derivative Kick”. The image above illustrates the problem. Since error=Setpoint-Input, any change in Setpoint causes an instantaneous change in error.
Is the volume reduction ratio the same as kick’s law?
By Kick’s law, since the volume-reduction ratio is the same in both cases, the ratio of energy would be 1 to 1. This discrepancy is great enough to challenge a test by actual experiment, of which there has been, hitherto, but little compared with the amount of argument.
How is kick and Rittinger’s law related?
Since the first operation produces only one-sixteenth as much new surface as the second, the ratio of energy expended in the two operations would be by Rittinger’s law as 1 to 16. By Kick’s law, since the volume-reduction ratio is the same in both cases, the ratio of energy would be 1 to 1.