Grinding mill monitoring instrumentation
AssigneeW. R. Grace & Co.
InventorsRobert F. Dumbeck, Phillip W. Welch
Life of this patent
Estimating the term…
Abstract
A current transformer is coupled about the power feed line of the motor operating a ball mill grinder or the like to sense the motor current. This current is converted to a motor load or horsepower signal which is processed together with mill flow rate information of both raw materials and additives such as chemicals for improving grinding efficiency. Thus, signals representative of mill operating efficiency are derived, and displayed in visual form having a relationship to internal mill conditions and optimum mill operating efficiency. Also the sampled signals are sampled and stored in digital form in a computer memory and in a tape recorder for processing and recall. The samples are identified by a recorded time signal.
Claims18
Instrumentation for monitoring the operating performance of an electric motor driven grinding mill comprising in combination,
- means for monitoring and indicating the electric motor current of the mill drive motor as the mill operates,
- means for calculating from a range of variations of said motor current as an input signal mill operating performance indicia representative of the internal grinding status of the mill and means for displaying the mill grinding status in each of a range of mill loads derived from said performance indicia, so that the mill operating conditions may be adjusted in response to the displayed mill grinding status to operate the mill in a predetermined mill load range.
Dependencies are inferred from the claim text.