Sag Mill Bearing Pressure

  • SAG Mill Grinding Circuit Design
    Semi Autogenous Design FactorsSag Mill Operation ExampleProcess Plant DescriptionSag Mill Design and SpecificationOperating Problems Since CommissioningDesign Changes and Future Operating StrategiesThe design of large mills has become increasingly more complicated as the size has increased and there is little doubt that without sophisticated design procedures such as the use of the Finite Element method the required factors of safety would make large mills prohibitively expensive.In the past the design of small mills, up to +/- 2,5 metres diameter, was carried out using empirical formulae with relatively large factors of safety. As the diameter and length of mills increased several crit...
  • Model Predictive Control for SAG Milling in Minerals

    Model Predictive Control for SAG Milling in Minerals Processing 5 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.

  • Calculation Of Sag Mill Weight From Bearing

    » difference between sag mill and ball mill » what is the difference between a ball mill and a sag mill » sag and ag mill power calculation » difference between sag mill from ball mill » ball mill sag mill difference » discharge bearing pressure in a sag mill » calculation of sag mill weight from bearing

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  • OUTOTEC GRINDING TECHNOLOGIES

    acid-resistant mills for grinding in raffinate or with acid-forming feed, as well as special feed and discharge arrangements and special bearing arrangements. Outotec SAG and ball mill Outotec high-performance grinding mills use advanced simulation tools for the best possible process efficiency, mechanical reliability, and maintainability.

  • Mill Lubrication System SlideShare

    Parts of Ball Mill to be lubricated: Trunnion bearing Feed end Gearbox Trunnion bearing Dis. end Pinion Fig.2 : Ball Mill diagram. Motor 21. Gathered Data: This were the alarm gathered during my stay in the Mill. MILL ALARM DATE Diff. High Pressure Trunnion Feed End April 20, 2013 SAG Bearing Recirculation Oil Inlet Temp.

  • Ball Mill Trunnion Bearing Lube System

    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. System monitors including pressure switches and flow monitors are

  • Evolution of SAG Mill Process Control at the Xstrata

    decided to make SAG control one of its priorities in order to further increase throughput and improve stability. The original primary mill control logic delivered by the Optimisation Project in 2005 consisted of a simple PID loop controlling the mill charge (bearing pressure) through feed rate changes.

  • Mill (grinding) Wikipedia

    SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also 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.

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  • Using Fuzzy Control to Optimize SAG Mill Production

    Using Fuzzy Control to Optimize SAG Mill Production Lynn B. Hales, KnowledgeScape Systems, a Division of EIMCO, Salt Lake City, 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

  • Evolution of SAG Mill Process Control at the Xstrata

    decided to make SAG control one of its priorities in order to further increase throughput and improve stability. The original primary mill control logic delivered by the Optimisation Project in 2005 consisted of a simple PID loop controlling the mill charge (bearing pressure) through feed rate changes.

  • Mill (grinding) Wikipedia

    SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also 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.

  • Calculation Of Sag Mill Weight From Bearing

    Weight Ball Mill Crusher Mills, Cone Crusher, Jaw Crushers. Vibrating Feeder. How to calculate the friction between the bearing. ag mill bearing pressure ironbeneficiation. sag mill bearing replacement Feed rate was initially controlled by the SAG mill power draw with bearing pressure as override. Ball loads . egs stand for in sag mill power

  • KnowledgeScape

    Control strategies can now factor in volumetric loading, charge toe angles, and steel-to-liner impacts in the decision tree along with bearing pressure, recycle pebbles, and mill power. Compromising accuracy when selecting an acoustic sensor for your SAG mill will only compromise the integrity of the expert control system for future improvements.

  • SAG Mill Control: It Shouldnt be that Hard

    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, but not the weight of the mill itself. While many mills today are mounted on load cells, others employ bearing oil pressure as a proxy measurement of mill load.

  • OOKING INSIDE YOUR MILL Process IQ

    • MILL FILL LEVEL CONTROL Use the Mill Feed Rate to control the Mill Fill Level (rather than bearing pressure). The Mill Fill Level setpoint can be pushed to a safe maximum to optimise the throughput. Stabilize all Fill Level Signals (input, output, shell) for effective 'what goes in goes out' operation. • SAFETY CONTROL

  • SAG Mill Control at Northparkes Final Semantic Scholar

    SAG Mill Control at Northparkes Page: 1 mipac.au SAG Mill Control at Northparkes Mines (Not So Hard After All) Bearing oil pressure suffers from inaccuracy. Load cells are expensive to retrofit to existing mills and, if they stop working, are difficult to repair.

  • Mill scanner Charge Detection Sensor LinkedIn

    10-3-2017· We should also always remember that bearing pressure and power are used only as proxies to estimate volumetric load. This approach has several weaknesses, which become particularly apparent when ore properties vary (e.g. imagine how ore size can change the charge shape / loading profile on a SAG mill for the same bearing pressure/speed/etc).

  • Modelling SAG milling power and specific energy

    Modelling SAG milling power and specific energy consumption including the feed percentage of intermediate size particles in the SAG mill feed (Scw); rectly measured with bearing pressure measurements, it was decided to discard it as an input variable.

  • What's the Difference Between SAG Mill and Ball

    Difference Between SAG Mill and Ball Mill, from the working principle, application, the service life of the bearing Bush is prolonged. The pressure indication of the high pressure oil circuit can be used to reflect the load of the mill indirectly. When the mill stops running, the high pressure

  • What's the Difference Between SAG Mill and Ball

    Difference Between SAG Mill and Ball Mill, from the working principle, application, the service life of the bearing Bush is prolonged. The pressure indication of the high pressure oil circuit can be used to reflect the load of the mill indirectly. When the mill stops running, the high pressure

  • Automated SAG Mill Speed Control Using On-contact

    The two main variables for controlling the SAG mills are feed and speed. Feed is presently controlled automatically via an expert system that adjusts the amount according to readings taken off of multiple bearing pressure load cells on each mill. Speed control was initially desired to be

  • Performance enhancement tools for grinding mills

    Impact level as a function of speed and bearing pressure †SAG analyser patent pending in Australia, Canada, Chile, South Africa and USA. PERFORMANCE ENHANCMENT TOOLS FOR GRINDING MILLS 109 uncertainty may be very misleading for the operator. It is possible that a load composed largely of balls may be interpreted as a ‘very hard ore

  • MONSAG: A new monitoring system for

    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 and ball mill controls ontwerpbureau

    Sag and ball mill controls. Model Predictive Control for SAG Milling in Minerals Processing 5 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

  • Toe angle measurement for SAG mill control at

    Description. SAG Mill process control classically maintains the SAG mill volumetric filling within a set operating range. Typically a SAG mill weight measurement, by either bearing pressure transducers or load cells, is used as an inferred measurement of volumetric filling.

  • OPTIMAL SAG MILL CONTROL USING VIBRATION & DIGITAL

    Figure 4 Mill Conditions: Too Fast, Too Empty, Full Mill (left to right) After the polar plot is checked to determine if a mill is operating at too high an RPM, the fill levels are monitored. Figure 5 illustrates a trend taken from a SAG mill running under expert system control using bearing pressure

  • How To Install A Ffe Trunnion Of A Sag Mill

    Home >News > How To Install A Ffe Trunnion Of A Sag Mill . How To Install A Ffe Trunnion Of A Sag Mill . Prompt : Caesar is a famous mining equipment manufacturer well-known both at home and abroad, major in producing stone crushing equipment, Discharge Bearing Pressure In A Sag Mill

  • A Method to Determine the Ball Filling, in Miduk Copper

    autogenous (SAG) Mill via an utilized method. Miduk SAG Mill circuit is shown in Figure 1. Figure 1: Diagram of Miduk Copper Complex SAG Mill Methods The following methods were utilized in this research work for ball filling calculation. To fulfill this aim, three approaches were investigated. Surface load photograph,

  • Robust Multivariable Predictive Control Strategy on

    Manipulated variables · Fresh Feed (MV1): This variable has a fundamental impact on the control of the SAG mill circuit. Variations in fresh feed flow affect the SAG mill fill level, and thus its bearing pressure. SAG Mill Speed (MV2): This variable affects the ore residence time in the mill and, consequently, the other operating variables.