CPE: Lesson 13. Principle of Size Reduction

The reduction ratio, defined as the relation between average size of feed and average size of product, can be used as an estimate of the performance of a comminution operation. The values for average size of feed and product depend on the method of measurement, but the true arithmetic mean, obtained from screen analyses on samples of the feed and product streams, is commonly used for this purpose.

Mobile Crusher

MOBILE HAMMER CRUSHER. MC-1400HS. Mobile Hammer Crusher equipped with Hammer Crusher Box 1400HS, driven by electricity. Feed inlet opening 1300 × 800. Max feed size (mm) 700. Crusher power (kw) 185. MC-1600HS. Mobile Hammer Crusher equipped with Hammer Crusher Box 1600HS, driven by electricity. Feed inlet opening 1500 × 900.

DEM Simulation of Laboratory-Scale Jaw Crushing of a Gold …

hardness, bulk density, particle size distribution, particle top size and particle strength (toughness) and crushability of the feed material [4]. The design parameters of the crusher include the size of the top opening, the set, the volume of the crushing chamber

Effect of Feed Rock Size Distribution on Crusher Performance

 · Effect of Feed Rock Size Distribution on Crusher Performance. If the ore feed to any gyratory or jaw crusher consisted entirely of large cubes or spheres of a …

Size Reduction Equipment

•Particles of average feed size 50 x 10(-4) m are crushed to an average product size of 10 x 10 (-4) m at the rate of 20 tonnes per hour. At this rate, the crusher consumes 40 kW of power of which 5 kW are required for running the mill empty. Calculate the power

MetE-215 Materials Processing Laboratory EXPERIMENT 1 PARTICLE SIZE …

Factors influencing the energy consumed by crushers: 1) Size of feed, 2) Size of product, 3) Capacity of machine, 4) Properties of rock or ore, 5) Percentage of idling time (the time when the crusher is not in use) etc. Roll Crusher: Not widely used; also


Model Theory. The user is required to define the crusher product in one of three ways: the selection / breakage numbers, which is mathematically more sound, but requires the user to have a large amount of data available. Test data giving the crusher product size distribution for a given feed distribution. The user is required to input both size ...

Understanding the Different Types of Crushers | Agg-Net

Size reduction in an impact crusher relies on energy being conveyed into the rock from the rotor, and it begins with the feed. The initial impact is responsible for more than 60% of the crushing action, with the remainder being made up of impact against an adjustable breaker bar and a …


Minerals Engineering, Vol. 3, No. 5, pp. 517-523, 1990 0892-6875/90 $3.00+00 Printed in Great Britain Pergamon Press plc TECHNICAL NOTE PRIMARY CRUSHER OPTIMAL FEED COMMANDING THE BLAST PATTERNS ...


large feed opening for its size, and an ideal nip angle that offers smooth material flow and high reduction efficiency. Jaw crushers are normally capable of a reduction ratio of 1:2 or 1:3. This ratio is affected by the feed material''s bulk density, crushability, size

Cone Crusher

F = feed size distribution (mass) Equation (11.31) is the widely accepted model of crushers that is used to predict the size distribution of products in different types of crushers. ...


Maximum feed size. Reduction ratio must be limited to 3 (-4). Recommended max feed size is 50 mm. Correct feed distribution. Feed distribution should be non segregated and evenly distributed around crushing cavity. Setting closer to required product

Roll Crusher

Roll crushers apply shear or compression to the material that is going to be reduced in size. This action occurs between two hardened surfaces. The speed and diameter of the rolls, the desired capacity, and the feed and product size distribution are all critical in the ...

Maximize your cone crusher productivity : Pit & Quarry

 · Providing better crusher feed control for the cone crusher through the use of surge piles, hoppers and variable-speed feeding devices such as belt conveyors or vibrating pan feeders can easily increase crusher productivity by a minimum of 10 percent. ''s LT220D combines a crusher and screen onto the same chassis.

Selecting crushing chambers for cone crusher

 · Feed should always be well graded with no gaps in the size distribution, which generally means an even distribution of different-sized feed material up to the defined maximum size. Fines (for example, 0–4 mm) should be screened out before the material is fed to the crusher as the fines may cause packing: this is a force overload and can be seen as adjustment ring movement.

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator …

Primary, coarse grinding (up to 400 mm feed size) Grinding media is grinding feed plus 4-12% ball charge (ball dia.100- 125 mm) High capacity (short retention time) Less sensitive to feed composition (critical size material) Semi-Autogenous Mill Note the size of

(PDF) Screening and Sieve Analysis | Ithuteng Khoza

The losses are mainly due to blinding, type and condition of panels, and the effects of the 3.03 t/h feed rate. . The industrial screen had a wide particle size distribution (PSD). In addition to the feed rate, the phenomena of stratification and probability may be cause

Process engineering: Particle size reduction techniques and …

 · There are many choices for a size-reduction process, depending upon the feed material, the desired product, hazards, costs and common practices in the given industry. Size-reduction equipment can range from very large and rugged jaw crushers, capable of reducing boulders to sand, to very precise cutting mills.

Cone crusher basics in 4 minutes — SRP

It''s hard to overstate the importance of feed size in a cone crusher. It is vital that you know, as accurately as you can, the size distribution of the raw material. The CH cone crusher can be calibrated to achieve specific results, maximize productivity and minimize wear, but any calculation will be undermined without a solid understanding of what is going in to the crusher.

Dynamic Modeling and Analysis of a Novel 6-DOF Robotic Crusher Based on Movement Characteristics

 · This paper proposes a novel 6-DOF robotic crusher that combines the performance characteristics of the cone crusher and parallel robot, such as interparticle breakage and high flexibility. Kinematics and dynamics are derived from the no-load and crushing parts in order to clearly describe the whole crushing process. For the no-load case, the kinematic and dynamic equations are …


To determine and analyze the size distribution of a fixed granular solid by using a Vibratory Shaker. 04-07 3 Crushing of Ore in the Jaw Crusher, and Determination of average size by sieving. 08-09 4 Crushing of Coal in the Jaw Crusher, and5

Modelling SAG milling power and specific energy consumption including the feed percentage of intermediate size particles

different size distributions, because different size distributions can have the same F80. The feed size distribution is also the implicit result of the ore competence (affecting blasting and crushing performance). This distribution affects the SAG mill load and the load


6 CV200 RANGE (VSI) MANUAL CRUSHER SELECTION 1. Determine the maximum feed size. 2. The minimum feed size to the crusher, must always be less than 25mm (1"), in either open or closed circuit. 3. Determine the total tonnage throughput of

Chapter 18. Feed Milling Processes

Grinding or particle-size reduction is a major function of feed manufacturing. Many feed mills pass all incoming ingredients through a grinder for several reasons: (a) clumps and large fragments are reduced in size, (b) some moisture is removed due to aeration, and

Principle of a cone or gyratory crusher. | Download Scientific …

In mineral crushing operations, the feed rate and feed size distribution affect the crushing rate and particle size distribution of the crushed products. In the present study, copper ore feed ...

A Dynamic Model of Inertia Cone Crusher Using the Discrete …

Product size distribution Crusher dynamic response Drive shaft Connecting shaft Main shaft Concave Rubber absorbers Mantle Globe bearing Feed chute Bottom main frame Top main frame Feed Product Partial block vibrator Operational settings (DEM) Figure 1

Calculate the Reduction Ratio and the Number of Milling Stages

 · I usually develop size-reduction flowsheets for ore processing. I set a series of crushers and/or mills to get the suitable size distribution from the run of mine. To do so, I have to know the number of milling stages, the suitable equipment, and their arrangement. The ...

Cone Crusher

Crusher - an overview | ScienceDirect Topics

Crushing Chamber Application Guide C5-1086:01ENG by 9

 · BASIC CRUSHING PRINCIPLES FEED OPENING The size distribution of the raw material is called the particle size distribution, or PSD for short. It …

Mineral Processing

 · 3. Size distribution of feed. 4. Crushing properties of ore. CAPACITY OF A JAW CRUSHER T ( Tones/ hr) = 3.75 LS. L- Length of feed opening ( cm). S- Length of set opening ( cm) . ENERGY REQUIREMENTS OF A JAW CRUSHER. Depend on Size of the feed, Size