SAG mill and two 26 ft ball mills, all made by . The drive systems that enable the mills to operate at benchmark levels of reliability, efficiency and availability were made by ABB, whose solution comprises a 23.5 MW gearless mill drive (GMD) for the SAG mill, and two 13 MW low-speed dual-pinion ring-geared mill drive (RMD) systems for the ...
experiment of a drum mill type SAG 8.5 x 5.3 The investigated target function is the relative energy consumption E, kWh/t, which is a result of the ratio of the power of the mill motor measured by the sensors and the productivity of the mill for the final product per unit time. The relative energy consumption is obtained by the formula:
Summary of Mill Survey Results 80 survey 1, SAG 2 70 Survey 1 2 2 3 60 Blast # 340-319 320-314 320-314 310-316 SAG 1 Muck Load, vol % 26.3 22.8 - 26.9 50 Ball Load, vol % 11.0 13.8 13.8 13.2 40 Ball Size, mm 150 125 125 125 30 Power, KW 4550 4650 3970 4310 20 Bearing Pressure, 3900 3740 3720 3927 10 kpa 0 Mill Speed, rpm 11.42 11.42 10.79 11.50 ...
Table 1 includes the technical data for the Copper Mountain SAG mill. Table 1 - general SAG mill data Specification Data Mill size 10.363 M [34 feet] diameter by 6.096 M [20 feet] long Mill type Wet grinding, grate discharge Mill drive motor size 17,000 HP Mill drive motor type Synchronous 200 RPM Inside diameter 10,363 mm Length 6,096 mm
Figure 5.11 Power variation with mill speed for different media shapes (J=15%).86 Figure 5.12 Power variation with mill speed for different media shapes (J=20%).87 Figure 5.13 Power variation with mill speed for different media shapes (J=25%).87 Figure 5.14 Variation of mill power draw with mill filling, J (cylpebs media)…..88
SAG mill liner development draws primarily on practical experience from SAG milling operations supported by computer-based modeling of charge motion in SAG mills and on established good design practice. Liner design needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e., the impact of shell liners on the grinding action and of grates ...
operation of SAG mills. SAG mills are currently the technology of choice in hard rock milling operations for reducing primary-crushed ore to ball mill feed. In recent years, the trend has been towards larger-sized SAG mills with diameters of 10.4 m (34 ft) and above, with the largest being 12.2 m (40 ft) in
An industrial case study is presented of a 38' diameter SAG mill, which was experiencing challenges associated to liner breakage and low efficiency with the old liner design.
accomplished by primary crushing, SAG milling and pebble crushing followed by ball milling. The concentrator is a single line configuration, comprising of one FL 40 ft. diameter × 22 ft. long (EGL) SAG mill driven by a 24,000 kW gearless drive. The SAG mill feeds two FL ball mills
Sag Mills And Ball Mills Pdf. ... 2019-2-251 x fls sag mill exclotordrive for salere-assignment mill details type of mill fls sag mill mill dimensions 12,192 x 7,620 mm 40x25 diam x l mills, ball mill trunnion lubrication system for each mill, ball mill feed spouts, ball mill braking systems, jacking cradles. ...
adheres to the walls of the mill before cascading off at a given angle causing impact and fragmenting the ore (Nunez F, 2011). There are different types of SAG mills; low aspect, medium aspect and the high aspect. The aspect ratio here refers to the ratio of the mill diameter to length. High aspect mills …
The primary ball/SAG mill discharge is one of the most severe duties in mineral processing. The suction wearplate is subjected to rapid wear due to high solids concentration and the coarse nature of the slurry. Goulds developed a proprietary process to locate and mold ceramic rods into the rubber liner for the optimum combination of hardness
There is a type of plant where the constant throughput SAG mill is sensible. If the SAG mill is not intended to be the rate-limiting step in a process plant, then it is best to adjust the SAG load (and power) to hold a constant tonnage to satisfy another constraint elsewhere.
base of longterm experience in Iranian pipe mills . Introduction : Metalic pipes and tubes are classified in different cataegories depending on the material, size, production technique and applications. Seamless tubes are made directly from the ingot or bar. All other types are produced by rolling and welding the metal sheets or strips .
Want to control grinding mill feed, Automatically? The MillMinder Audio Signal Converter listens to the sound levels generated by the impact inside the grinding mill and provides the operator with an output signal that allows automatic material feed control to the mill. ... (Sag) Mill - Single Compartment.pdf : Airswept - Single Compartment.pdf ...
load, lubrication type and method as outlined in ISO 15312. This standard has been established for oil lubrication but is also valid for grease and uses the fol-lowing reference conditions: • A temperature increase of 90° F (50° C) above an ambient temperature of 68° F (20° C), (thus a bearing temperature of 158° F (70° C), measured on
Jul 01, 2019· An optimization is carried out to minimize the yearly cost of energy for the operation of the SAG mill. This cost includes the energy consumption cost in $/kWh and the capital cost for the PV-BESS infrastructure, prorated over the life of the battery system, accounting for the discount rate through an annuity factor (Pamparana et al. 2019a, b).The energy requirements are defined by the SAG ...
Jan 01, 2016· The SAG mill had a 6–8% ball charge and the power consumption was 8 kWh/t, which agreed well with the expected value. 9.6. Problems. 9.1. In an SAG mill the dimensions of the mill were 9.75 m × 3.5 m and the specific gravities of the mineral and …
the SAG mill, another for its specific energy consumption and a third for the tonnage of fresh ore fed to the milling circuit. The development of these models and their validation, are based on operational information from 4 SAG grinding circuits corresponding to 3 chilean copper concentration plants.
Model types: mill power draw. Austin SAG model (hybrid phenomenological and empirical model) Morrell C-model for SAG & ball mills (phenomenological model with empirical fitting). Sub-divided into: a simplified model with 'typical' defaults and; a full model with all parameters editable.
type seals which can be installed with little or no site assembly. Seals however have precision ground and honed components with finished accuracy of 2 microns (0.08 mils) they do not tolerate operation in a poorly aligned condition, face rubbing, elevated temperatures and ingress of contaminants quickly damage expensive components. Seal
SAG mill lined with 48 rows of Hi-Low type liners. Because of breakage of Low type liners and cold welding, the liner replacement task of Low with new Hi type liners has become very difficult and time-consuming. With the objective of finding a new design
Feb 27, 2017· Grinding is one of the most important and expensive steps of mineral processing. Therefore, different types of grinding mills such as rod mills, ball mills, semi-autogenous (SAG) mills and autogenous (AG) mills can be utilized for comminution of mineral ores [].Up to today, SAG mills and AG mills have been widely used to reduce operation costs and increase throughput.
involves replacing the mill charge several times throughout the test. The Bond tests are typically run for a minimum of seven cycles, while the MacPherson and pilot plant tests are operated for about 6-10 hours. The achievement of steady-state is desirable in a grinding test, because harder components may build up over time. For AG/SAG mills,
May 01, 2021· The object of the study is a semi-autogenous grinding mill SAG 34 17 (the diameter of the mill is 34 feet, the length is 17 feet), which processes charges of copper–nickel ores. The ores that make up the charge are divided into 3 conventional types. For each type of
The SAG mill was installed with a low ball charge, no variable speed and a fine grind was targeted (P80 106 m). High circulating loads and difficulty achieving the target grind size were experienced. This type of ore should have been treated in a high ball charge SAG mill with variable speed capability.
Jan 13, 2014· 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. SAG Mill Components Type Characteristic Motor Bearings Omala 150 Gear oil. 150 viscosity at 40 C and 15 viscosity at 100˚C Gearbox Omala 320 Gear oil. 320 ...
• Mill type: SAG, FAG, Rod mill, primary ball mill, secondary ball mill, regrind, …) • Ore feed size (F80,F100) and required product size (P80) determining the grinding mechanism to be favoured • Mill size (diameter, length) • Maximum ball top-up size • Mill rotational speed …