Cone crushers have a crushing chamber that is revolved around its centre axis and crushing does not occur all at once but in a circular motion This property gives rise to a potential non optimal crushing in the form of power draw fluctuations due to the variance in feed across the crushing chamber with respect to mass flow particle size
However this detection method has poor timeliness and cannot quantitatively classify and identify the characteristic parameters of feeding metallic foreign objects Therefore there is an urgent need to address this issue and a predictive fault diagnosis method for detecting feeding metallic foreign objects in crushers needs to be proposed
More uniform feed distribution was obtained by changing the shape of feed chute from cubic to cylindrical decreasing its surface area from to m² and increasing the cylinder length
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 method of taking photos of the feed material when it was loaded onto the feeder limited
Cone crushers use various support mechanisms to generate an imaginary pivot point which allows for a larger feed entry to the crushing zone However as the eccentric angle and the pivot point control the degree of eccentric motion at any height in the crusher the height of the pivot point is a key design decision
As to cone crushers Evertsson 2000 developed an analytical model for estimating the performance of cone crushers Huang et al 2007 established a multi objective model for the crushing chamber output and particle size reduction based on a new production calculation method Bengtsson 2009 proposed two models to predict the shape of crushed
provide a new feeding arrangement solution A slight variant of the systems engineering approach seen in Figure 5 was applied given the specific circumstances existing solution ideas and time constraints 2 Method The Discrete Element Method The discrete element method is the dominating methodology for the simulation of particles and
The discussion of future trends brings attention to the discrete element method model based control plant wide and mine to mill optimization and machine learning applications for data acquisition and process optimization However the CSS is set manually by an operator Operating cone crushers at the choke feed point is recommended by
feed crusher different methods of starting are used to reduce the starting current of the induction motor of the device In addition a number of measures must be taken to stabilize the supply voltage 2 Methods One of these methods is the method of controlling the speed of the asynchronous motor of feed crushers using a frequency converter [3]
6 A full working method statement and specific risk assessment should be produced for all works involving a mobile crusher The method statement should cover all the issues raised in this article as well as prevailing site environmental and regulatory conditions The key risks are; Machinery Guarding; Clearing Blocked or Stalled Crushers; Slips
Fig 2 Excavator feeding mobile stone crusher Blocked crushers Causes Causes of crusher blockages can be grouped under two main headings Stalling due to Bridged crushers The preferred method of clearing a bridged crusher is by the use of a hydraulic arm typically a360 excavator fitted with a quick hitch bucket attachment and either
In all of three types of crushers the fractal dimensions and crushing rate of the ore were increased with an increase in feeding feed size distribution and by increasing the amount of particles
Discrete element method can be used to quantify the segregation and misalignment in the incoming feed making it possible of evaluating different design alternatives such as rotating discs rock
The effect of feed chute design on tertiary cone crusher performance at the Sarcheshmeh copper complex was studied by an in house developed DEM software called KMPC DEM © To simulate the overall crushing circuit the multi geometry procedure by improving the routines of object files importing into the simulation environment was implemented in DEM codes
In response to the difficulties and poor timeliness in detecting feeding metallic foreign objects during high yield continuous crushing operations in coal mines this paper proposes a new method for detecting metallic foreign objects combining pulsed eddy current testing with the Truncated Region Eigenfunction Expansion TREE method This method is
Feed material already contains variable amount of circuit product fractions Theoretical circuit throughput varies Approach This paper proposes a novel circuit wide mass balance con trol method to address the mass balance control problem of a crushing circuit The method is based on a mass balance con
for miss fed crushers is an important result of the simulations The correlation between the DEM simulations and full scale results is already on a level where it has proven its usefulness to solve
3 Not Too High Feeding For cone crushers the height of the material falling from the feeding equipment to the feed port should not be too high If the feeding height is too high the stone tends to rush into the crushing chamber at high speed causing an impact load on the crusher and the crushing force that exceeds the design limit
