Find out how our application accurately predicts SAG Mill performance to recommend the bearing pressure set point, when to add the balls and when to check the liners.
It is commonly assumed SAG mill control can only be successfully .... capability in the event of bearing lubrication problems or power failures. Read more Autogenous mills, …
BrainWave Control solutions for SAG mills. 02 The solution: Measure. Control. And profit. BrainWave SAG mill is a unique control package using patented model-based predictive adaptive control technology. It is well known within the mining industry ... ing feed rate to keep bearing pressure at set point. Testing and analysis by plant staff
Parts of SAG Mill to be lubricated: Trunion Bearing (feed end) Motor Bearings Gearbox Pinion Bearings Fig.1 : SAG mill Diagram Trunion Bearing (dis. end) 7. Lubricant Data: Masbate Gold Project’s SAG mill uses Compounded Gear Oil as their main lubricant. But a different class of Gear oil is use in every operating system of the SAG mill.
1. Empty mill start-up set-point for Toe Angle = 145o. Enter this set point and start auto-feed control. 2. As the mill fills, observe how bearing pressure & power increase over time (see trends). 3A. If power or bearing pressure begin to reach their maximum limits, increase the toe set point. o i.e. change toe angle set point from 145 to 147o ...
We constantly maintain desired operating conditions by monitoring bearing pressure, power, recycle pebbles, mill density and mill acoustics. On average, expect a 3-6% increase in SAG mill throughput over an operator/DCS system.
Void Fill Sag Mill . discharge bearing pressure in a sag mill – Grinding Mill … discharge bearing pressure in a sag mill ... This is the world's biggest SAG mill equipped with ... Contact Supplier
adjust mill speed. • New rules for the expert system speed control: High LDL signal and low bearing pressure, reduce speed and prevent “metal on metal” operation. • Two vibration systems installed and in operation at Gold Corp Peñasquito on their two 2265 TPH SAG mils.
Model Predictive Control on a SAG Mill and Ball Mills The solution for the SAG Mill is an adaptive controller which controls mill load using direct mill weight measurement or indirectly from bearing oil pressure. The solution automatically controls ore master feed rate and water addition to increase
bearing. Pressure [bar] Slide shoe bearing Depending on the size of mill, its shell is supported at the periphery by two, four or six slide shoes. The self-aligning support of the slide shoes compensates any slide ring wobbling and eccentricity caused by mill sag, thermal distortion and manufacturing tolerances. Hydrodynamic or hydrostatic ...
“Within seconds, SAGwise can analyse audio frequencies as well as on board power usage, mill weight and bearing pressure. It can then automatically take corrective action if needed and adjust parameters such as the mill ore feed rate, mill speed or slurry density.
Ball Mill Trunnion Bearing Lube System View Larger Image On a 11’-6” x 22’-0” Ball Mill, the trunnion bearing lubrication system provides continuous low pressure flood oil for cooling and lubrication of the bearings, and high pressure oil for hydrostatic lift of the feed and discharge trunnions during start-up of the mill.
Increasing the bearing pressure, led to increase the mill speed in order to increase breakage and discharge rate. After some time, as the bearing pressure was increasing continuously, mill feed rate decreased and water flow rate adjusts itself with the feed rate in order to keep SAG mill load solid percent within acceptable limits.
A new monitoring system (MONSAG) intended for indirect measurement of the load filling of a SAG mill is presented. The operating principle is based on the processing of electrical variables of the motor vector-control and process variables, complementing the typical bearing pressure measurement and contributing to the process control quality.
SAG, AG, Mill, Vibration, Process, Control, Optimization INTRODUCTION The vibration sensor based signals are more responsive and have a greater dynamic range than traditional control signals such as electronic ears, bearing pressure and mill power. The increased response
Few attempts have been made to use measurements of bearing pressure in the estimation of absolute values for the parameters that define the state of the mill load (e.g, mass, volume, and dynamic ...
Grinding plant with SAG and tube mill for Gold/copper ore grinding in Australia. This is the world's biggest SAG mill equipped with sliding shoe bearing arrangement and COMBIFLEX® drive system (a favourably-priced alternative to the ring motors normally used with SAG mills of this size).
SAG mill feed is at its maximum, and bearing pressure remains low A positive set point change will be applied if the mill density is high. A positive set point change will be also applied if the mill density is within its range and all of the following conditions are true:
discharge bearing pressure in a sag mill – Grinding Mill … discharge bearing pressure in a sag mill. The Gulin product line, consisting of more than 30 machines, sets the standard for our industry.
HPGR - High pressure ... HPGR - High pressure grinding roll for the minerals industry Introduction During its relatively short history in minerals processing, HPGR technology has undergone significant development in machine roll wear surfaces and ... robbing the SAG mill of volume and creating low capacity issues for the
When the mill conditions become unstable (particularly the mill power and bearing pressure) such as when the throughput is adversely affected by high dolerite level in the feed, the circulating load will be tapped off as a strategy to increase milling rates.
Using Fuzzy Control to Optimize SAG Mill Production Lynn B. Hales, KnowledgeScape Systems, a Division of EIMCO, Salt Lake City, UTAH ... Controlling the feed rate to a SAG mill is at the ... the mill bearing pressure can also be used to control the mill speed. If the
• Maintain SAG mill bearing pressure below limits • Maintain ball mill power draw below limits • Maintain pebble recycle flow below limits • Maintain SAG mill power draw below limits Grinding circuit MPC Manipulated Variable Disturbance Variable Controlled Variable Constraint Variable Maximize Upper Constraint Lower
Outotec Grinding technologies 005 Robust design Outotec mills are designed to produce optimal results, even in harsh environments. Outotec offers both trunnion and shell supported mill design, complemented by a drive solution tailored for optimum performance in any environment. Mill bearings The type of support bearing is selected on the basis of
A Neural Network Model for SAG Mill Control - SGS. is the SAG Mill 1 Bearing pressure. (described later in Figure 3). These fuzzy belief values are used as inputs to ...
SAG Mill Circuit Optimisation at Ernest Henry Mini - Free download as PDF File (.pdf), Text File (.txt) or view presentation slides online. ... Thickener Concentrate Thickener Pressure ... modifications incorporated to Sag Feed Rate Sag Mill Bearing Rate Scats Sag Mill Water Flow Sag Mill Power
Figure 4 – Bearing pressure and power response following SAG mill grind out (inverse relationship) Figure 3 and Figure 4 show real-life examples of the Bell Creek SAG mill being ground-out following mill overloads. In Figure 3, both bearing pressure and mill power can be seen to be increasing up until the mill feed is stopped.
“Within seconds it has analysed the audio frequencies as well as taking on board power usage, mill weight and bearing pressure. It can then automatically take corrective action if needed and adjust parameters such as the mill ore feed rate, mill speed or water usage.
SAG is an acronym for Semi-Autogenous Grinding. SAG mills are autogenous mills but use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.
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.