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Research on Comminution Processes and Simulation.

PB295191

Publication Date	1978
Personal Author	Fuerstenau, D. W.
Page Count	62
Abstract	The report presents the results of an investigation of comminution process simulation and scaleup of parameters in the population balance grinding model. It was found that grinding kinetics are highly correlated with the net power input to the mill. A normalized form of the model in which the energy input per unit mass of material being ground is the independent variable was obtained and this is shown to provide relatively accurate predictions of the product-size distribution over the normal range of ball mill operating conditions. Experimental data obtained in three different mills demonstrated the usefulness of this form of the model in the scaleup design of ball mills. Material flow through continuous ball mills was studied in mills of different lengths by using tracer techniques. The adequacy of the lumped-parameter population balance model for the simulation of the open circuit grate discharge ball mills at steady-state is demonstrated. Useful engineering design scaleup criteria are established and their applicability evaluated.
Keywords	Comminution Grinding(Comminution) Simulation Ball mills Mathematical models Design
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 94G - Manufacturing Processes & Materials Handling
Corporate Authors	California Univ., Berkeley.; Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Final rept. Jun 71-Jun 77.
NTIS Issue Number	197918
Contract Number	H0111821

Research on Comminution Processes and Simulation.

Research on Comminution Processes and Simulation.
PB295191

Publication Date	1978
Personal Author	Fuerstenau, D. W.
Page Count	62
Abstract	The report presents the results of an investigation of comminution process simulation and scaleup of parameters in the population balance grinding model. It was found that grinding kinetics are highly correlated with the net power input to the mill. A normalized form of the model in which the energy input per unit mass of material being ground is the independent variable was obtained and this is shown to provide relatively accurate predictions of the product-size distribution over the normal range of ball mill operating conditions. Experimental data obtained in three different mills demonstrated the usefulness of this form of the model in the scaleup design of ball mills. Material flow through continuous ball mills was studied in mills of different lengths by using tracer techniques. The adequacy of the lumped-parameter population balance model for the simulation of the open circuit grate discharge ball mills at steady-state is demonstrated. Useful engineering design scaleup criteria are established and their applicability evaluated.
Keywords	Comminution Grinding(Comminution) Simulation Ball mills Mathematical models Design
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 94G - Manufacturing Processes & Materials Handling
Corporate Authors	California Univ., Berkeley.; Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Final rept. Jun 71-Jun 77.
NTIS Issue Number	197918
Contract Number	H0111821