COMMINUTION MODELING
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COMMINUTION KINETICS AND VELOCITY. Second order with delay
By Ph.D. Igor Bobin, February 12, 2017
Now we can’t say that there is enough knowledge about the problem of the development and the use of mathematical models in relation to the grinding and crushing processes. Currently, there are no universal models for crushing and grinding processes. Throughout the world there is an objective need for the development of mathematical models of crushing and grinding. More...
CURVES OF COMMINUTION KINETICS (grinding, crushing)
By Ph.D. Igor Bobin, January 22, 2017
UNIVERSAL EQUATION OF GRINDING KINETICS
By Ph.D. Igor Bobin, Ph.D. Natalia Petrovskaya, January 23, 2017
Today unconventional types of ores are involved in the processing in large quantities. The main trend now is to obtain ultra fine grinding of ores. This has led to the fact that crushing and grinding operations are the most costly at the plant. Costs for grinding can reach 60% of the total cost of ore processing.
FORMULA FOR THE DIRECT CALCULATION OF THE COMMINUTION VELOCITY
By Ph.D. Igor Bobin, December 27, 2016
In previous articles [1-3] we have talked about the modeling of comminution kinetics (crushing and grinding kinetics) C = f (t), where C – is the content of the size fraction (size class) of final product, %; t – is time, secs.Now we are acquainting with сomminution velocity vc.
Comminution velocity (rate) vc is ratio of the size fraction content C to unit of time t. Comminution velocity is derivative of time vc = dC/dt (%/secs).
Our modeling approach to comminution kinetics allows to carry direct calculation of сomminution velocity, pioneering move. A visual representation of the сomminution velocity in time is very important for solving the optimization problem of the mineral processing technology. More...
EQUATION OF COMMINUTION KINETICS WITH DELAY
By Ph.D. Igor Bobin, Ph.D. Natalia Petrovskaya, December 18, 2016
Rock is a variety of different minerals united together. A comminution process is used to liberate one mineral from another. The size of the pieces of rock decreases with the comminution and mineral particles are released.
The purpose of the comminution is to obtain the finished product of a certain size. The finished product is directed to the separation of one mineral from another.
Crushing and grinding operations are expensive, so the kinetics of grinding (сrushing, comminution) is very important for the management.
The comminution kinetics reflects the change of the content of the size fraction (size class) of finished product in time: C = f(t). More....
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