rittinger law specific grinding

Rittinger - an overview | ScienceDirect Topics

Noting that the specific surface area of a (spherical) particle is inversely proportional ... Rittinger's equation is said to fit better fine milling while Kick's expression describes ... Kick's law, valid for particles greater than 0.5 cm, was used less than ...

Grinding and cutting - Unit Operations in Food Processing - RL Earle

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 ...

Relationships between comminution energy and product ... - SAIMM

grinding. The Third Law states that the net energy required in comminution is propor- tional to the total ... is applicable for crushing, Rittinger's equation may be used for finer ... between the product P80 and the net specific grinding energy.

UNIT OPERATION Size Reduction

Rittinger's Law (2). As the specific surface of a particle (the surface area per unit mass) is proportional to 1/L, equation (2) postulates that the energy required to ...

Energy requirements in size reduction of solids - Semantic Scholar

cting experiments on grinding that the theories propounded by Kick ... specific surface production are obtained by crush- ing single particle at low ... Rittinger's theory E = C ( 1 /x2 —1 /x1 ). Kick's law. E. — / n (x2 / x1 ) . . . Bond. E — 2 C (1/NT2.

Comminution - Wikipedia

Comminution is the reduction of solid materials from one average particle size to a smaller average particle size, by crushing, grinding, cutting, ... Rittinger's law, which assumes that the energy consumed is proportional to the newly generated ...

Development of size reduction equations for calculating ...

6 Jul 2018 ... Specific energy input to the hammer mill increased from 1.4 kWh t−1 (5.2 J g−1) for large 25.1-mm screen to 25 kWh ... power input for grinding pine wood chips using hammer mill ... equations of Kick, Rittinger, and Bond have built-in funda- ... The following general equation represents the scaling law that.

This article appeared in a journal published by Elsevier. The ... - ORBi

In Eqs. (1)e(5), E1e2 (specific energy) is the milling energy needed for a ... Von Rittinger's, Kick's and Bond's laws were collated by. Charles [11], who stated that ...

How Material Size Directly Affects Size Reduction Energy | Powder ...

25 Mar 2015 ... There are many reasons to pursue jet milling as part of your size reduction plan. ... Rittinger's Law — The energy required for reduction in particle size of ... a given quantity of material to a specified fraction of its original size is ...

Fine Grinding - A Refresher - SAGMILLING.COM

grinding include the “signature plot”, Von Rittinger's model and Charles' equation. ... mapped the consumption of specific energy from a “large” size, roughly ...

Modelling the processing of gasifier feed - Digital Refining

The application of Kick's, Rittinger's, and Bond's laws is limited to a certain range of particle size: Rittinger's Law <0.05 mm (fine grinding); Bond's Law 0.05-50 ...

Identification of Optimal Mill Operating Parameters during Grinding ...

parameters. With the use of population balance modeling the specific rate of breakage and the cumulative ... between specific energy and size reduction in comminution are those of Rittinger ... breakage follows a first-order law. That is, the rate ...

Comminution of Dry Lignocellulosic Biomass: Part II. Technologies ...

22 Jun 2018 ... Von Rittinger [25] states that the specific energy Em (energy by unit of mass) ... In general, the Kick's law is used for coarse grinding, Bond's for ...

Energy consumption of two-stage fine grinding of Douglas-fir wood ...

12 Mar 2018 ... The specific energy consumption increased with the decrease of ... Rittinger's law states that the energy required for breaking a material is ...

PRODUCTION OF ORGANIC PIGMENT NANOPARTICLES BY ...

and Dr. Abbas Zaman for their insightful discussions on milling and serving as ... benefits are derived form the high specific surface area of nanoparticles. ... Rittinger's law states that as the particle size decreases the energy required to fracture ...

The Theory and Practice of Pharmaceutical Technology | Digitális ...

Size reduction increases specific particle surface significantly, which is important for ... Crushing, grinding, pulverizing of solid state materials are also disintegrating ... WR the work required for size reduction, according to Rittinger's Law.

Energy requirements for comminution of fibrous materials ... - DiVA

Key Words. Biomass, wood, comminution, specific energy, total specific energy, effective specific ... Rittinger's law is more suitable for fine grinding, where there ...

Size Reduction Laws - Mineral Process Engineering

4 Jun 2013 ... The cost of power is a major expense in crushing and grinding, so the factors that control this cost are important. Size Reduction laws: Rittinger's ...

Claudio Schneider - Cetem

At the time of Gaudin, Kick's grinding law had been disproved, and all ... energy specific selection function required by the Herbst-Fuerstenau scale-up ...

Breakthrough in Clinker Grinding - Concrete Sustainability Hub - MIT

The standard work indices of Kick, Bond and Von Rittinger each work within specific particle size ranges based on empirically derived factors. To date ... Griffith's Law also requires a characteristic length scale to define a fracture process zone.

measuring the efficiency of the tumbling mill as a ... - Mountain Scholar

Grinding mills used in the mining industries are the most energy-intensive ... The law of von Rittinger indicates that the net energy required in a certain process of.

DE-11: Lesson 43. SIZE REDUCTION

27 Sep 2012 ... Reduction to a definite size range may be a specific product requirement; e.g. ... Rittinger's law has been found to hold better for fine grinding.

Grinding Laws | Mill (Grinding) | Blade - Scribd

3 Apr 2012 ... Rittinger's Law gives better results for fine grinding where there is a much greater change ... cutting sheeted material into individual muesli bars ...

Measurement of energy requirements for size ... - Academic Journals

while Kick's equation showed a higher R2 value for groundnut shell. ... Where: E is the total specific net energy for milling a unit of dry ... Kick's Law: (3).

Chapter 1 - RUcore

other grinding media and the individual particles as a function of critical bond strength. ... it is common to find both Rittinger's law and Bond's law match well with ...

analysis of the breakage rate function for selected process ...

Keywords: ball mill, specific grinding rate, grain morphology, contact points ... expenditure necessary for particle comminution and the basic laws governing ... the studies carried out by Bond (1952), Brach (1962), Kick (1885), Rittinger (1867).

11 Crushing and classification - Particle Technology

the processes of crushing, grinding, milling, micronising, etc. Changing the size of the ... In Summary, Kick's law is better for larger particles and Rittinger's.

The size reduction theories of solid foods

The most important grinding laws were discussed. ... ties have the greatest influence on grinding energy. ... Rittinger's law [5] states that the energy required for.

Evaluation of grinding circuits for iron ore - SciELO

The second grinding circuit involved two mills operating in parallel, both in direct ... AUSTIM, L. G. A Commentary on the kick, bond and rittinger laws of Grinding.

Energy consumption of two-stage fine grinding of Douglas-fir wood

12 Mar 2018 ... Rittinger's comminution law for rotor impact mill grinding tapped density to aerated bulk density, both increased with decreasing particle size in ...