Capacities and perforiDance characteristics of jaw …
The final equation for the capacity of jaw crushers can now be written as (9) where K1• K2 and K3 are related to the parameters Fav/G, T/ G and the nature of the material. respectively. Using the data of Hersam ( 1923). quantitative relationships between these.
bond work index equation for jaw crusher
Rittinger. The Bond work index (Bond, 1960) is based on Bond's law, ... (Bond, 1985). The equation is commonly written as: ... Air-dried limestone was crushed continuously in a laboratory single-toggle Blake jaw crusher designed to provide a throw of 228 mm.
Metallurgist & Mineral Processing Engineer
Example Jaw Crusher Size Calculations Calc No: Title: Primary jaw crusher sizing Purpose: Basis / Assumptions: Crushing work index (Wi C) kWh/tonne kWh/st Design criteria Solids bulk density t/m³ Bulk density is the apparent density F100 (max opening) mm µm of a loose pile of unconsolidated F80 (blasted rock) rocks. It is not "specific ...
Crusher Efficiency Calculations
A jaw crusher, like 2036 in the Jaw Crusher Table here above, would be able to take the maximum 12 in. size quarry stone but it would not have the required 70 tph capacity needed. To have the needed capacity a jaw crusher like the 2042 or 2436 sizes will have to be selected overloading the secondary crusher.
sbm/sbm jaw crusher equation.md at main · redmik40/sbm
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Development of a New Generation High Crushing …
A jaw crusher is a kind of size reduction machine which is widely used in mineral, aggregates and metallurgy fields. The performance of jaw crusher is mainly determined by the kinematic features ...
Distribution of impact (crushing) work index for selected …
Characterization of rocks for selection of crusher can be done in different ways, and the most commonly used is Bond work index (Tavares and Carvalho 2007). Holmes (1957) proposed a modification ...
Jaw Crusher
Designs of different types of jaw crushers such as Blake, Dodge with single and double toggles used for initial comminution of minerals, as received from mines, are described in detail. The method of calculating operating variables such as the critical speed, toggle frequency and throw and power consumptions are explained and illustrated with practical examples with …
Drive power calculation of a crushing machine …
Fig. 1. Scheme of a rotary-cone crusher: a – sectional view of the crusher; b – section A-A. The power spent on material crushing is consumed to overcome the moment of force M: М = Р .l, (2) where P – magnitude of the force required to carry out crushing; l= R+h – moment arm P
Compare and Understand Rod/Ball/Impact-Crushing/Abrasion BOND Work Index
Anyone wondering how Bond ball mill work index compares versus SPI or JK A*b? Well, M. Doll says, several comparisons have been published, such as at CMP 2011 and Procemin 2009 and in general, the Wi_BM is not compatible with the other two because they measure different size classes. The Bond ball mill work index measures the grindability in the 2 …
Bond Work Index Formula-Equation
The basic work index equation is: W = 10 Wi/√P – 10 Wi/√F(1) where W is the work input required in kilowatt hours per short ton to grind from 80% passing F microns to 80% passing P microns, and Wi is the work index, or the grinding resistance parameter. It represents the energy input required in kilowatt hours to reduce a sh…See more on 911metallurgist
Simulation of Energy Consumption in Jaw Crusher Using …
feeding of a crusher is applied which is usually undesirable. Crushing in closed circuit operations produce more undesirable fine material than do open circuit operations. The crushing action comes from stresses applied to rock particles by moving parts of the machine. One of the most famous and old crushers is the jaw crusher.
DETERMINATION OF THE INFLUENCE OF JAW …
VELOCITY OF THE ECCENTRIC SHAFT OF JAW CRUSHERS Fig. 1 shows a drawing of a jaw crusher with an eccentric shaft. When the moving jaw is removed from the static [4], the crushed product is freely discharged through the disharge port of the crusher under its own weight. With each move of the jaw, only ore pieces located below the level
To Study The Operation of Jaw Crusher | PDF | Nature
This document provides instructions for operating a jaw crusher. It begins with safety warnings and then provides details of the machine components, operating procedures, and calculations for determining crushing efficiency. The key steps are to measure the size of the feed material, adjust the jaw opening, power on the machine and record energy meter readings with and without …
Crushing of coal and calculation of size reduction efficiency.
The document discusses the history and evolution of coal crushers. It begins with an overview of the importance of crushing coal and the early developments starting in the 1800s. Key crushers discussed include the Cornish rolls, jaw crushers, gyratory crushers, single and double roll crushers, rotary breakers, impact crushers, and hammer mills.
Kinematic and Dynamic Analysis of the Moving Jaw for …
DYNAMIC ANALYSIS OF JAW CRUSHER. External Forces acting on the jaw crusher system is shown as in Fig. 5.1. Fig. 5.1: External forces acting on the jaw crusher system. Where, T. is the torque on the crank due to (F. s ) t. F. ext. is the external force acting due to crushing action . Mg. is the force due to weight of pitman . Ma. com. is the ...
Analysis of the Single Toggle Jaw Crusher Force …
According to Chinese jaw crusher manufacturer's data, the PE 400 by 600 single toggle jaw crusher has 30 kW motor power and an input eccentric shaft speed of 275 rpm or 28.7979 radians per second. Assuming that the input speed is constant, the input torque is found to be 1.0417 kNm.
Bond F.C., 1961. Crushing and Grinding Calculations
Title: Bond F.C., 1961. Crushing and Grinding Calculations.pdf Author: can Created Date: 4/2/2009 4:00:03 PM
(PDF) Design and Operations Challenges of a Single Toggle Jaw Crusher …
A review on the design and operations challenges of a single toggle jaw crusher is presented. Strength and fracture toughness of the material to be crushed are intrinsic properties that determine the time and energy required to crush the material. ... Nigerian Journal of Technology C. Okechukwu, et al Taking into account equation (2), either ...
Jaw Crusher QJ241
Equipment: Single toggle C10 jaw crusher: Feed opening: 1,000 x 650 mm (40 x 26 in.) Max. feed size: 520 mm (21 in.) Capacity (up to) 225 mtph (248 stph)
bonds law equation in crusher
bond work index equation for jaw crusher. Bond s law for flotation machine mills,crusher.Deze pagina vertalen.Bond work index formula-equation basic equationssize distribution and exposure ratioequations for work index variationswork index and crack energy the basic work index equation isw 10 wip 10. Consulta; bonds law equation in crushers
Capacities and perforiDance characteristics of jaw …
Hersam (1923) proposed a method for calculating capacities using a Dodge-type jaw crusher. The equation proposed by Hersam includes a number of constants that are only qualitatively …
Crushing in Mineral Processing
Primary crushers are designed so that the maximum size that can be presented to the crusher is approximately 80% of the gape. Jaw crushers are operated to produce a size reduction ratio between 4 :1 and 9 : 1. Gyratory crushers can produce size reduction ratios over a somewhat larger range of 3 :1 to 10 :1.
Gyratory and Cone Crusher
Thus, as in jaw crushers, the performance of gyratory crushers will be affected by ... The expression is claimed to be applicable for gyratory crushers as well. Equation (5.5) indicates that once ... A long shaft suspended spindle gyratory crusher 12.7 cm × 127 cm was commissioned to crush limestone with a work index of 13.2 kWh/t. The crusher ...
Jaw Crusher
Jaw crushers are designed to impart an impact on a rock particle placed between a fixed and a moving plate (jaw). The faces of the plates are made of hardened steel. Both plates …
Crusher Reduction Ratio
As an example, suppose that it is required to make a reduction of 7:1 in two stages of crushers, one a standard gyratory and the other a fine-reduction crusher. We know from our examination of the crushing characteristics of these types that, for equal reduction ratios, the volume-reduction-ratio in the standard gyratory is considerably higher ...
Bond Work Index
For operating a jaw crusher it is necessary to know the maximum power required consistently with the reduction ratio and the gape and closed side settings. The maximum power drawn in a …
(PDF) DESIGN AND OPERATIONS CHALLENGES OF A SINGLE TOGGLE JAW CRUSHER
Jaw crusher machines are used in the mining and construction industry for crushing rocks and mineral ores to the appropriate sizes for direct application or further processing.
A quick method for bond work index approximate value determination
crusher and roll crusher in a cl osed cycle with screening to size -3.327 mm. Composite samples of andesite and lim estone were prepared in ratios: limestone : andesite = 25 : 75,
Index Equation Work Bonds To Jaw Crusher Ball
Mib = Provided by data from the standard Bond ball work index test using the following equation (Morrell, 2006): ... work index than the crusher (ie the ball mill is less energy efficient than a crusher and has to input more energy to do the same amount of size reduction). Hence from equation 7, to crush to the ball mill circuit feed size (x 2 ...