Grinding method and system with material inlet detection
AssigneeGebr. Pfeiffer AG
InventorsMathias Dülfer, Saskia Kuner, Florian Tanzmann
Life of this patent
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Abstract
A method for grinding feed material (1) in the form of particulate bulk material is disclosed. In the process, particle sizes of the feed material (1) are detected, and the feed material (1) is ground in a mill (3) on the basis of at least one manipulated variable. The at least one manipulated variable is modified when the proportion of small particle sizes in the detected particle sizes increases. A system for grinding feed material (1) in the form of particulate bulk material is also disclosed.
Claims15
A method for grinding feed material (1) in the form of particulate bulk material, including the steps of:
- detecting particle sizes of the feed material (1),
- grinding the feed material (1) in a mill (3) on a basis of at least one manipulated variable, and
- modifying the at least one manipulated variable if a proportion of small particle sizes in the detected particle sizes of the feed material (1) increases.
A method for grinding feed material (1) in the form of particulate bulk material, including the steps of:
- detecting particle sizes of the feed material (1),
- grinding the feed material (1) in a mill (3) on a basis of at least one manipulated variable,
- modifying the at least one manipulated variable if a proportion of small particle sizes in the detected particle sizes of the feed material (1) increases,
- calculating a parameter which is indicative of the proportion of small particle sizes, wherein the parameter is calculated from a cumulative distribution function with respect to the particle sizes, and
- wherein the cumulative distribution function is volume-based, and wherein the volume-based cumulative distribution function has a diameter limit value as a function argument, and a quotient of a sum of volumes of all detected particles having a diameter smaller than a diameter limit value divided by the sum of the volumes of all detected particles as a function value, wherein the parameter is the diameter limit value where the function value of the cumulative distribution function corresponds to a fixed shortfall proportion.
A method for grinding feed material (1) in the form of particulate bulk material, including the steps of:
- detecting particle sizes of the feed material (1),
- grinding the feed material (1) in a mill (3) on a basis of at least one manipulated variable,
- modifying the at least one manipulated variable if a proportion of small particle sizes in the detected particle sizes of the feed material (1) increases,
- detecting a vibration generated by the grinding, and
- storing a time history of at least one parameter in view of the vibration, at least one parameter in view of the detected particle sizes, and at least one parameter in view of a grinding power as an operational data set.
Dependencies are inferred from the claim text.