A Physical Explanation of the Empirical Laws of Comminution
KnowChem 386 subscribers 4.8K views 2 years ago By watching this video you will definitely clear some of your important topics like LAWS OF COMMINUTION | RITTINGER'S LAW | KICK'S LAW | BOND'S.
PPT Energy Use in Comminution PowerPoint Presentation, free download
Colorado School of Mines. Occupation (s) mining engineer, laboratory director, consulting engineer. Known for. advancing the applied science of comminution. Fred Chester Bond (June 10, 1899 - January 23, 1977) was an American mining engineer. A graduate of the Colorado School of Mines, he worked in the mining equipment and ore milling.
PPT What is Comminution PowerPoint Presentation, free download ID
Discusses the three laws of comminution, namely the Rittinger's law, the Kick's law and the Bond's law, and the general formulation by Walker et al. Also discusses the concept of work.
[PDF] Aspects of comminution flowsheets design in processing of mineral
Holmes's law, which modifies Bond's law by substituting the square root with an exponent that depends on the material. [2] Forces There are three forces which typically are used to effect the comminution of particles: impact, shear, and compression . Methods There are several methods of comminution.
PPT Energy Use in Comminution PowerPoint Presentation, free download
in comminution is proportional to new sur-face produced. 3) Bond's theory13 Bond's so called third theory of comminution states that the energy required is proportional to the length of crack initiating breakage. Each of the three well known laws of comminution can be represented as a special case of general equation (1) derived by Walker, Lewis.
Comminution mechanism
There are three laws of comminution to be taken into account. The laws date back to the 19th and mid-20th century, yet are still widely used. Let's start with the Kicks law, it can be applied to the crushing of solids and states that the amount of energy required to crush a given quantity of material to a specified fraction of its original.
A Physical Explanation of the Empirical Laws of Comminution
The pioneering effort came in 1867, when the Austrian mineral scientist Peter R. von Rittinger proposed the first of the three models that came to be known as the "laws of comminution." The second such model was proposed by Friedrich Kick, also an Austrian-born investigator, in 1885.
PPT What is Comminution PowerPoint Presentation, free download ID
Laws of comminution: It is almost impossible to find out the accurate amount of energy requirement in order to affect size reduction of a given material, mainly because 1. There is wide variation in the size and shape of particles both in feed and product 2. Some energy is wasted as heat and sound which cannot be determined exactly.
Size Reduction, the Three Laws of Comminution, and the Bond Equation
Grade Efficiency (Tromp) Curves. 00:36:51. Thank you! This presentation deals with size reduction - a technique found in virtually every industry from mining to pharmacueuticals. We will briefly deal with the long history of size reduction before outlining comminution theories and their applicability. This presentation deals with size reduction.
PPT Energy Use in Comminution PowerPoint Presentation, free download
As with any material, rock particles only break when the applied tensile stress exceeds the tensile strength of the rock. However, in terms of comminution, the main interest is to derive reliable ways of assessing how a particular material breaks in a comminution device such as a crusher or a mill [].In general, the breakage of rock particles is dependent on two factors: the "hardness" of.
LAWS OF COMMINUTION RITTINGER'S LAW KICK'S LAW BOND'S LAW
1 Principles of Size Reduction 1.1 Introductory Aspects In many food processes it is frequently required to reduce the size of solid materials for different purposes. For example, size reduction may aid other processes such as expression and extraction, or may shorten heat treatments such as blanching and cooking.
PPT Energy Use in Comminution PowerPoint Presentation, free download
Starting from the simplifying suppositions of both geometrical similarity of the particles undergoing comminution and similarity of the states of stress and strain, a relationship is obtained between initial particle size and energy investment for a distinct material. On additional simplifying assumptions this leads to Rittinger's law.
Laws governing for comminution YouTube
0:00 / 30:23 Laws of comminution: Examples-1 Mechanical Operations 3.32K subscribers 11K views 6 years ago Mechanical Operations Two worked examples are considered to illustrate the computation.
Lecture1Laws of Comminution PDF Mill (Grinding) Secondary
278 22K views 6 years ago Mechanical Operations Three laws of comminution or size reduction such as Kick's law, Rittinger's law and Bond's law are defined and its objectives in industrial.
PPT What is Comminution PowerPoint Presentation, free download ID
In particular, it is shown that: (1) the conventional energy laws are generally not applicable over initial grinding intervals; (2) a sufficient condition for energy laws to hold is that the size distributions of comminuted particles are self-preserving; (3) many common descriptive measures of fineness, for example mean, median, percentiles, spe.
A Physical Explanation of the Empirical Laws of Comminution
Abstract. Fragmentation over a wide range of size scales has been discussed in previous papers. A variety of statistical powerโlaw relations have often been used successfully to describe scaling laws of the size distribution and shape (surface roughness) of fragments, indicating that fragmentation is a scale invariant process.