Xstrata Zinc: SAG Mill Power / Load Control

PROJECT OVERVIEW. The new SAG mill at Xstrata’s Zinc/Lead Concentrator had not been performing to expectation. The mill was operating below design power (2100kW), and at lower rock loads – leading to reduced throughput and a shorter liner service life.

Get PriceSAG Mill Control: It Shouldnt be that Hard

2010-4-13 · SAG mill control fundamentally means managing the load in the mill by adjusting the feed rate of ore to the mill and/or manipulating the rotational speed of the mill. The best way to measure load is to mount the mill on load cells. The load cells are calibrated to measure the total weight of water, grinding media (balls) and ore in the mill ...

Get PriceBenefits of process control systems in mineral …

2015-8-1 · Table 1 summarizes the information collected as a function of the type of control system and the commercial control system used, the objective(s) set out for the control system, the manipulated and controlled variables, and a suite of quantitative metrics, including mill load, grinding media wear, power consumption, ore throughput, cyclone performance, recovery benefit, labour, downtime and ...

Get PriceProcess Control in metallurgical plants—From an …

2007-1-1 · Embedded in the control system, power, charge, feed size and assay information are utilised in a fuzzy controller to control SAG feed rate, and grinding circuit density, crusher gap. Addition of mill speed, when possible, further adds to the controller's effectiveness.

Get PriceImproved mill control at Lihir Gold Mine in Papua New ...

At the Lihir Gold Mine, the plant was utilizing mill’s bearing pressure to calculate load measurement for the SAG mill in HGO1. The use of SAG mill weight for process control is additionally complicated at Lihir by compromised and suddenly drifting load cell and bearing pressure measurements on two of the process plant’s three SAG mills.

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