Real-time monitoring system to determine wear of grate ribs in semi-autogenous mills, to detect clogging conditions of the grates during the operation and to detect working conditions under direct impact of the balls on the grates
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United States of America Patent
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Dec 27, 2016
Grant Date -
Jun 5, 2014
app pub date -
Jun 12, 2013
filing date -
Dec 14, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A real-time monitoring system to monitor the wearing in the thickness of the ribs (5) of a grate (1) of a SAG mill (9) due to the abrasive action of the ore pulp residing inside the mill and due to the action of the grinding elements during the operation, and which in certain cases also generates obstruction of the slots (4) due to the jamming of said grinding elements inside the slots (4) while the mill is running, and said grate (1) has a screening surface (2) that includes a pulp lifter (3) and an external surface (7) that is not exposed to impacts, and also includes a central trough (6) where the supporting elements fit and which allow securing the grate inside the mill through fitting bolts (12), wherein said system includes: a sensor (16) located on the external surface (7), and said sensor (16) is connected to a sensor adaptor unit (17); a wireless transmitter (18) connected to said sensor (16), and said transmitter transmits the signal from the sensor (16); a wireless receiver (20) receiving the signal from the wireless transmitter (18); and a signal reader (21) connected to said wireless receiver (20) which processes the signals received from the accelerometer. The sensor (16) can be an accelerometer or a strain gage.
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