US 12,313,598 B2
Monitoring liner wear in industrial mills
Zhigang Sun, Greenfield Park (CA); Kuo-Ting Wu, Brossard (CA); Cheng Hu, Richmond (CA); and Silvio Elton Krüger, Brossard (CA)
Appl. No. 18/008,212
Filed by National Research Council of Canada, Ottawa (CA)
PCT Filed Jun. 21, 2021, PCT No. PCT/CA2021/050844
§ 371(c)(1), (2) Date Dec. 5, 2022,
PCT Pub. No. WO2022/000072, PCT Pub. Date Jan. 6, 2022.
Claims priority of provisional application 63/047,958, filed on Jul. 3, 2020.
Prior Publication US 2023/0236154 A1, Jul. 27, 2023
Int. Cl. B02C 17/18 (2006.01); B02C 17/22 (2006.01); G01N 29/24 (2006.01); G01N 29/34 (2006.01)
CPC G01N 29/2437 (2013.01) [B02C 17/1805 (2013.01); B02C 17/22 (2013.01); G01N 29/348 (2013.01); B02C 2210/01 (2013.01); G01N 2291/0258 (2013.01); G01N 2291/02854 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of monitoring both liner wear and charge impact in a mill comprising:
deploying a sensing probe through an opening in a shell of a mill into a liner of the shell, the sensing probe comprising a sensor and an elongated element having a proximal end and a distal end, the sensor mounted on the proximal end of the elongated element outside the shell, the distal end of the elongated element situated inside the liner inside the shell so that the distal end of the elongated element is impacted by charge during operation of the mill, the elongated element wearing at a same rate as the liner under conditions within the shell, the sensor capable of detecting impact of the charge on the elongated element during operation of the mill;
using the sensor to determine whether the elongated element has decreased in length since a previous length determination and relating a decrease in the length of the elongated element to liner wear; and,
using the sensor to determine variations in charge impact on the elongated element over time and relating the variations in charge impact over time to a force of impact events in the mill and/or a location of the charge in the mill.