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Where Monitoring for High Pressure Grinding Rolls (HPGR)

IP.com Disclosure Number: IPCOM000240696D
Publication Date: 2015-Feb-19
Document File: 1 page(s) / 11K

Publishing Venue

The IP.com Prior Art Database

Abstract

The current documents suggests to use one or more ultrasonic position sensors instead of the optical or inductive position sensors which I installed close to the surface of the rules and measured the distance between the roll surface and the sensor. Furthermore, it is possible that the sensor moves in axial direction in order to obtain the full picture of the road the rolls her face.

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Where Monitoring for High Pressure Grinding Rolls (HPGR)

High pressure grinding rolls (HPGR) are used for hard rock grinding as well as in the cement industry. In the cement industry, the rolls are mainly driven by direct online machines. In contrast the HPGR systems used for hard rock grinding are driven by variable frequency converters, which allow the rolls to be driven at variable speeds in order to meet the requirements of the ore or the grinding process.

Nevertheless, it has been experienced that the rolls do not show identical wear rates, which leads to unequal roll diameters. Therefore, it is beneficial to be able to measure the roll diameter while the machine is operating.

The state of the art in DD201501A1, DE000004222085A1, DE102007004004, EP0509809A2, EP2724779, and WO2005005048A1 suggest monitoring devices for measuring the roll diameter which measure the distance between the defined position of the sensor and the roll surface using optical or inductive position sensors.

The current documents suggests to use one or more ultrasonic position sensors instead of the optical or inductive position sensors which I installed close to the surface of the rules and measured the distance between the roll surface and the sensor. Furthermore, it is possible that the sensor moves in axial direction in order to obtain the full picture of the road the rolls her face.