• Application research on rough set -neural network in the

    Ball Mill Fault Sample Set The ball mill had very huge job data, so in some selection fault attribute were regarded as the condition attribute of rough set, it need to apply the observation data of field sensors, instrumentation, etc, now it selected part of the fault data as fault sample sets, and had application research of the algorithm.SIMINE Gearless mill drives Siemens,Gearless mill drives. Longer service intervals thanks to low-wear drive processes Fault analysis To facilitate quick and efficient fault analysis, our reliable Whether you’re talking about SAG or a ball mill, space is a delicate issue, especially in the concentrator. That’s

  • Ball Milling for Biomass Fractionation and Pretreatment

    4−5 cm in length and then coarsely milled by an RT 34 disk mill (Taiwan) through 1.00 and 0.50 mm screens, denoted as <1.00 and <0.50 mm, respectively. The <1.00 mm sample was further ground by a vibration ball mill (Qinhuangdao Taiji Ring Nano Products Co., Ltd., Hebei, China) to obtain ultrafine powder. Ultrafine grinding wasBallscrew Troubleshooting Guide Haas Automation,Feb 17, 2020· A properly aligned Ball Screw will exhibit consistent servo loads throughout its travel. If the servo load is not consistent, the following procedure should be used to align the Ball Screw: Break loose then lightly snug the following Bolts: Nut Housing to axis in question Bolts (Saddle, Table, Spindle Head, Etc.) Ballscrew to Nut Housing Bolts

  • Mill Critical Speed Calculation

    Effect of Mill Speed on the Energy Input In this experiment the overall motion of the assembly of 62 balls of two different sizes was studied. The mill was rotated at 50, 62, 75 and 90% of the critical speed. Six lifter bars of rectangular cross-section were used at equal spacing. The overall motion of the balls at the end of five revolutions is shown in Figure 4. As can be seen from theCASE STUDY: PROMINENT HILL Outotec,to perform the mill’s first dual shutdown since installed in August 2008. Both the SAG and Ball mill were scheduled for simultaneous relining to take place early in 2010, to replace the worn liners. MILL RELINE SCOPE As the mill liners had originally . been installed by the Outotec team (then TME), they were aware of the technical

  • Vibration Trouble-shooting Field Guide Reliabilityweb: A

    Also component fundamental is sometimes used; i.e. the bearing's ball pass frequency fundamental is expressed as component fundamental to distinguish it from harmonics in a ball pass problem within the spectra. Always make sure it is defined if used for anything other than running speed.Sigma 1 Axis Servo Motor and Cables Troubleshooting,Feb 14, 2020· Alarm 139 142 190, 273 MOTOR Z FAULT. Alarm 153 156 Z CHANNEL MISSING. Alarm 182 185, 194, 278 AXIS ENCODER CABLE FAULT. Alarm 217, 218, 219 AXIS PHASE ERROR. Alarm 224 228 AXIS TRANSITION FAULT. Faulty encoder cable or connection. Inspect the cables and connectors. Refer to the Main Processor/Encoder Cable section below.

  • McEwen Mining Inc. Operations Fox Complex

    The Stock property is also located along the Destor-Porcupine Fault, between the Lexam property and the Black Fox property. Stock hosts the Black Fox-Stock mill and is the site of the former Stock Mine, which produced 137,000 ounces of gold from an underground operation between 1989 and 2005.Gear Fault Diagnosis by Motor Current Analysis,- the time interval δt of the torque variation is small, i.e. the torque variation is high frequency, 3.2 Gear fault in a ball mill machine This application deals with a ball mill machine driven by two AC motors, each through a 2-stage reduction gearbox. Motors are 2MW power, 5kV voltage and 1000rpm speed. The gears are chevron type.

  • Gear Fault Diagnosis by Motor Current Analysis

    Gear fault in a ball mill. This ap-plication deals with a ball mill ma-chine driven by two AC motors—each through a two-stage reduction gearbox. The motors are 2MW power, 5kV volt-age and 1,000 rpm speed; the gears are chevron-type. During one experiment it was known from the operator that the high-speed pinion of one gearbox had one crackedSample Interval Identification DJB Consultants,Following a successful commissioning and start-up, we believe that two grinding lines at Las Bambas, Perú, each consisting of one SAG Mill and one Ball Mill (this mill combination is uniquely specific to Las Bambas ore types), are operating at design throughput of close to 140,000 tpd and within the range predicted by DJB from a managed multi-sample

  • SIMINE Gearless mill drives Siemens

    Gearless mill drives. Longer service intervals thanks to low-wear drive processes Fault analysis To facilitate quick and efficient fault analysis, our reliable Whether you’re talking about SAG or a ball mill, space is a delicate issue, especially in the concentrator. That’sBallscrew Troubleshooting Guide Haas Automation,Feb 17, 2020· A properly aligned Ball Screw will exhibit consistent servo loads throughout its travel. If the servo load is not consistent, the following procedure should be used to align the Ball Screw: Break loose then lightly snug the following Bolts: Nut Housing to axis in question Bolts (Saddle, Table, Spindle Head, Etc.) Ballscrew to Nut Housing Bolts

  • BEARING FAILURE: CAUSES AND CURES

    Ball path I \ or deposits on dngs. Redlbrown areas on balls, race- ways, cages, or bands of ball bearings are symptoms of corrosion. This condition results fmm exposing @ bearings to corrosive fluids or a cor- rosive atmosphere. The usual result is increased vibration followed by wear, with subsequent increaseVibration Trouble-shooting Field Guide Reliabilityweb: A,Also component fundamental is sometimes used; i.e. the bearing's ball pass frequency fundamental is expressed as component fundamental to distinguish it from harmonics in a ball pass problem within the spectra. Always make sure

  • HIGH INTENSITY GRINDING ISSUE 32 AT ITS FINEST

    mill means it is suitable for a wide variety of processes and offers other benefits such as minimised energy usage of up to 40-50% compared with traditional ball mills (see Fig. 1 overleaf). HIGH INTENSITY GRINDING AT ITS FINEST Authors: Mattias Åstholm, Andres Paz, Eddie Jamieson Illustration of 3 x Outotec HIG3000.Vibration Analysis Reporting Bearing Failure Stages,Example 1. A furnace combustion fan, which supplies billets to a rolling mill, is highly critical and a Stage 2 defect will require that planning begin to replace the bearing. The next opportunity for replacement could be in 6 to 12 months, by which time the fault may have progressed to a higher stage. Example 2.

  • Sigma 1 Axis Servo Motor and Cables Troubleshooting

    Feb 14, 2020· Alarm 139 142 190, 273 MOTOR Z FAULT. Alarm 153 156 Z CHANNEL MISSING. Alarm 182 185, 194, 278 AXIS ENCODER CABLE FAULT. Alarm 217, 218, 219 AXIS PHASE ERROR. Alarm 224 228 AXIS TRANSITION FAULT. Faulty encoder cable or connection. Inspect the cables and connectors. Refer to the Main Processor/Encoder Cable Permeability reduction in granite under hydrothermal,these results support the fault valve model of ore deposit for- mation at the base of high-angle reverse faults [Sibson, 1992, 20011 and also the hypothesis that fault seals form in less time than the recurrence interval for large earthquakes at the base of the seismogenic zone. In this paper, we continue the investigation of Moore el al.

  • CASE STUDY: PROMINENT HILL Outotec

    to perform the mill’s first dual shutdown since installed in August 2008. Both the SAG and Ball mill were scheduled for simultaneous relining to take place early in 2010, to replace the worn liners. MILL RELINE SCOPE As the mill liners had originally . been installed by the Outotec team (then TME), they were aware of the technicalOptimum choice of the make-up ball sizes for maximum,Sep 01, 2013· smallest ball size in the mill [mm] d max. largest ball size in the mill [mm] f j. weight fraction in size interval i in the feed to the mill [–] f 90. 90% passing size of the feed [L] F 50.8. optimum weight fraction of 50.8 mm balls in the make-up [–] g i. weight fraction in size interval i in the feed to the circuit [–] J

  • Application of Model-Based Deep Learning Algorithm in

    The coal mill is one of the important auxiliary engines in the coal-fired power station. Its operation status is directly related to the safe and steady operation of the units. In this paper, a model-based deep learning algorithm for fault diagnosis is proposed to effectively detect the operation state of coal mills. Based on the system mechanism model of coal mills, massive fault data areGear Fault Diagnosis by Motor Current Analysis,Gear fault in a ball mill. This application deals with a ball mill machine driven by two AC motors each through a two-stage reduction gearbox. The motors are 2MW power, 5kV voltage and 1,000 rpm speed; the gears are chevron-type.

  • SOFT SENSOR MODELING OF MILL LOAD BASED ON

    Keywords: Ball Mill, Mill Load, Feature Selection, Synergy Interval Partial Least Square 1 INTRODUCTION Ball mills are widely used for grinding in most comminution circuits. The crushed crude ores are grinded into enough fine slurry to ensure good liberation of the value minerals to be recovered. MillCASE STUDY: PROMINENT HILL Outotec,to perform the mill’s first dual shutdown since installed in August 2008. Both the SAG and Ball mill were scheduled for simultaneous relining to take place early in 2010, to replace the worn liners. MILL RELINE SCOPE As the mill liners had originally . been installed by the Outotec team (then TME), they were aware of the technical

  • Ball mill

    Ball mill: Parameter JinPeng Others Working life: 8-10 years: 3-4 years: Quality: JinPeng design institute constantly pursuing creativity and breakthrough in technology, especially on modification, energy saving, improve the capacity of ball mill.Vibration Trouble-shooting Field Guide Reliabilityweb: A,Also component fundamental is sometimes used; i.e. the bearing's ball pass frequency fundamental is expressed as component fundamental to distinguish it from harmonics in a ball pass problem within the spectra. Always make sure it is defined if used for anything other than running speed.

  • Ball Mill Maintenance & Installation Procedure

    Metallurgical ContentBall Mill Maintenance ManualOn Mill Installation and MaintenanceBall Mill Concrete FoundationsGrinding Mill FOUNDATIONGROUTINGBall Mill Sole Plate Am sure your Ball Mill is considered the finest possible grinding mill available. As such you will find it is designed and constructed according to heavy duty specifications. It is designed along sound engineering principlesVibration Analysis Reporting Bearing Failure Stages,Example 1. A furnace combustion fan, which supplies billets to a rolling mill, is highly critical and a Stage 2 defect will require that planning begin to replace the bearing. The next opportunity for replacement could be in 6 to 12 months, by which time the fault may have progressed to a higher stage. Example 2.

  • Fault Tree Analysis (FTA) and Event Tree Analysis (ETA)

    A fault tree diagram is drawn from the top down. The starting point is the undesired event of interest (called the ‘top event’ because it gets placed at the top of the diagram). You then have to logically work out (and draw) the immediate contributory fault conditions leading to that event.Application of Model-Based Deep Learning Algorithm in,The coal mill is one of the important auxiliary engines in the coal-fired power station. Its operation status is directly related to the safe and steady operation of the units. In this paper, a model-based deep learning algorithm for fault diagnosis is proposed to effectively detect the operation state of coal mills. Based on the system mechanism model of coal mills, massive fault data are

  • Solution of OC1 fault occurs during the frequency inverter

    Fault Name:OC1 fault occurs during the frequency inverter’s operation.Fault explanation: The OC fault is a sudden change in current detection during frequency inverter operation. In order to prevent it from being damaged by an excessive current, the frequency inverter internally collects the current signal and protects itself. Specifically, OC1 (over-current fault during acceleration), OC2Fault Detection of Electric Impact Drills and Coffee,Jan 11, 2019· The values of the RMS of acoustic signals “Healthy EID” and “EID with a rear ball bearing fault” were similar. It will be difficult to recognise these two classes. In the presented analysis (please see Section 3 ) the author used 50 1-s samples for each class of the CG-A.

  • Girth Gear Inspection Pre and Post Manufacture

    spray interval is also important for long gear life. Reviewing bolt torques at the split joint and mill mounting flange is also required. Inspection steps—manufacturer side: Given the critical service these gears per-form, quality assurance is an integral part of the manufacturing process. The process begins with chemical analysisCondition monitoring and fault diagnosis of ball mill gear,Ball mill is a typical representative of mineral processing equipment in mining machinery. This paper was concerned with the deterioration process of monitoring of gear, including the change of vibration and the spectrum characteristics. The common failure causes of gear and the methods of monitoring and diagnosis are given, which is of significance for reducing accidents, reducing maintenance

  • Assessment of the Functionality of Selection and Breakage

    For the case of wet grinding in a ball mill where all the top size is ground away during a small time interval, mu and Pt must bothbezero. With these constraints, the number of unknowns in the mill matrix are reduced. The mill matrix becomes: s Imij=l.O for 5;::j;:: 1;;1 (4) 00000 mZ1 m'}2 0 0 0 M = m31 m32 m33 0 0 ~1~Z~3~0 mS1 msz mS3 mS4 mss,