4 Unlike compression based crushers the AF VSI and GS series crushers do not have closed and open side settings CSS and OSS to specify what size the product will be once it has gone through the crusher The main way to adjust the reduction ratio of the VSI and GS is by adjusting the rotor rip speed
Jaw crushers also have a relatively high cost of maintenance and repairs and may require regular replacement of parts such as the liners and bearings They also have a lower reduction ratio compared to other crushers meaning they are not always the most efficient option for reducing the size of materials Comparison with Other Types of Crushers
HSI Crushers Basic Principles Rotor 4 • HSI crushers have one main method of crushing that of impact This impact comes primarily from a high speed rotating rotor mounted horizontally in the crusher and fitted with replaceable hammers • The hammers are manufactured from a high wearing material that can also withstand the high energy impact
Double roll crushers offer up to a 3 1 reduction ratio in some applications depending on the characteristics of the material Triple roll crushers offer up to a 6 1 reduction Impact crushers Primary impact breakers Primary breakers are noted for large expansion chambers above one or two revolving rotor assemblies As the rock falls into
Roll Crushers In Mineral Processing Design and Operations Second Edition 2016 Introduction Roll crushers consist of two or more adjacent rolls placed parallel to each other and rotated in opposite directions Single roll crushers are also available which rotate a single roll against a fixed breaker plate Mineral or rock particles placed between the rolls are nipped and
The reduction ratio is driven by the Crusher Close Side Setting The actual minimum safe closed side setting of a crusher will vary somewhat for any given crushing machine depending upon the character of the material the amount of fines in the feed and whether the crusher is being operated under choke feed or regulated feed conditions It is
compress particles between them a vertical shaft impact VSI crusher instead relies on impact energy By having the rock particles flung against each other at high rates of speed the resulting impact creates a high chance for areas of the rocks that are sharp and angular to be abraded off The resulting swarm of fragments
Calculate ratio of reduction by dividing feed size 1 by product size 2 Determine impact strength of material by laboratory tests or estimate by use of tables below From Graph No 2 find the horsepower hours per short ton at the reduction ratio of 5 1 Locate the product size as determined in step 2 at the bottom of Graph No 2
The crusher in this work is vertical and is of interest to us as it is known that impact crushers are capable of incredible size reduction ratio that can go up to 40 1 compared to around 6 1 that is typical for the jaw gyratory and cone crushers In impact crushers the hammers or beaters on a rotating shaft transfer kinetic energy to the
The crusher in this work is vertical and is of interest to us as it is known that impact crushers are capable of incredible size reduction ratio that can go up to 40 1 compared to around 6 1 that is typical for the jaw gyratory and cone crushers In impact crushers the hammers or beaters on a rotating shaft transfer kinetic energy to the
Reduction CH540 Net cap 101 mtph Throw 48 mm CSS 10 mm 91% < CSS 78% < 8 mm 97% < mm Reduction No plastic backing To illustrate the benefits of optimising your set up we compare sandvik s CH540 and CH430 crushers Additional sales generated by the CH540 26 mtph x 1500 h/year x 8 Euro/ton = 312 000/year Additional cost
Input parameters like closed site setting gap stone strength and target reduction ratios can be a useful parameter in determining the energy consumption of jaw crushers Similarly different mechanical and physical properties of stone like strength [ 10 ] put have major impact on power consumption of jaw crushers [ 11 ]
Impact crushers rotary or hammer mills have the capacity for high reduction ratios up to 40 1 but are rarely applied to hard rock mines Since they depend on high velocities for crushing wear is greater than for jaw or gyratory crushers With a typical 6 1 reduction ratio the power consumption of a large jaw crusher 48 by 60 is
There are different ways to calculate reduction ratio but the best way is something called the P80 factor The reduction ratio is then calculated by comparing the input feed size passing 80 per cent versus the discharge size that passes 80 per cent The finer the CSS the greater the proportion of fines produced Impact crushers An impact
Hence impact crushers are not recommended for use on ores containing over 15% silica Lewis et al 1976 However they are a good choice for primary crushing when high reduction ratios are required the ratio can be as high as 40 1 and the ore is relatively non abrasive Vertical Shaft Impact VSI CrushersBarmac Vertical Shaft Impact
Previous Post Next Post Contents1 Coarse size reduction of raw materials in Cement Size reduction machinery and A Machinery for size reduction in the coarse range crushers by application of compression B Crushers for size reduction by impact C For comminution in the fines range grinding mills by application of impact D Mills where
In a crusher s design attention to the reduction ratio is critical This ratio reflects the degree to which the material is reduced in size from the feed to the product A high reduction ratio indicates a powerful crushing capacity such as reducing 150 centimeter wide iron ore to a 30 centimeter wide material
Most published literature is focused on the use of cone crushers and several types of impact crushers There is a gap of knowledge regarding the quality of large size aggregates especially coarse aggregates produced in a single stage crushing plant The reduction ratio for each test is calculated as the ratio between the respective screen
material first breaks due to dynamic impact by a moving hammer and then the force of impact accelerates movement of the reduced particles toward breaker blocks and/or other hammers for further size reduction Dynamic impact has specific advantages for the reduction of many materials and it is specified under the following conditions
By referring to equipment manufacturer s bulletin on crushers Fig 1 a crusher producing 80% passing 3/4″ requires a close side setting of approximately 5/8″ The reduction ratio at any percent passing can be obtained quickly Place a piece of the log log paper the same as used in plotting along the percent passing line as
Optimum rock fragmentation from mining to mineral processing must meet the following conditions Zhang 2016a 1 minimum cost in the size reduction chain drilling blasting crushing grinding 2 maximum ore recovery ratio 3 high productivity and 4 minimum negative impact on safety and environment The fragmentation which
The objective of this research was to develop a mathematical model for gyratory crushers to help in the prediction of energy consumption and to analyze dominant parameters that affect this energy
Owning and operating costs not only impact a company s financial bottom line but also influence the overall efficiency and productivity of their operations Factors such as the crusher s throughput capacity reduction ratio and the quality of the final product should be considered Calculating the owning and operating costs of crushers
© Copyright 2024 By Ore Crushing Equipment Manufacturer
