# ball mills and sag mill problem

We provide a variety of milling equipments and production line. Welcome to consult and purchase.

E-mail: [email protected]

### SAG mill grinding ball

The sag mill grinding ball produced by ZJH minerals is high tech wear resistant products for different mines Our grinding balls are researched relies on the scientific research team composed of experts and scholars in the field of wear resistance sag mill grinding ball has the characteristics of high toughness high strength high wear resistance high corrosion resistance strong impact

Get Price### Ball Mills Brochure

Ball mills designed for long life and minimum maintenance overflow ball mill sizes range from 5 ft x 8 ft with 75 HP to 30 x 41 and as much as 30 000 HP Larger ball mills are available with dual pinion or ring motor drives Our mills incorporate many of the qualities which

Get Price### SAG Mill

2021 10 22 The SAG Mill is a machine added by Ender IO uses Micro Infinity µI to grind or mill items into their crushed variants like Ores into Dusts.The SAG Mill has four output slots recipes can have 1 4 different outputs with different chances of obtaining those outputs Uniquely the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency resulting in

Get Price### Shell vs Trunnion Mounted Mills

2014 9 3 Shell mounted mills with end walls directly above the main bearings are generally stiffer than trunnion mounted mills We have checked this by comparing a 26 ft shell mounted ball mill with a trunnion mounted mill of equal grinding volume and same diameter Detailed finite element models of each mill were created.

Get Price### C

2018 2 20 a Semi autogenous mill SAG operating with a pebble crusher and ball mills commonly referred to as an SABC type comminution circuit Modelling of the SABC circuit using JKSimMet was carried out using known equipment parameters operational data

Get Price### Minerals

The final plan was to increase the ball charge in the SAG and ball mill to 10 v v and 27 v v respectively set the upper limit of the operating power in the ball mill to 5800 kW use a TRIO TC Series crusher without a power /feed rate–controlling device but with a feed bin to crush pebbles for recirculation back to the SAG mill feed

Get Price### ONLINE SAG MILL PULSE MEASUREMENT AND

2006 6 24 Depending on the mill size the SAG mills draws between 2 MW and 17 MW The product from the SAG mill is further reduced in size using pebble crushers and ball mills Hence typical gold or copper ore requires between 2.0 and 7.5 kWh per ton of energy to reduce the particle size Considering a typical mining operation processes 10 000 to 100 000

Get Price### Key considerations when selecting a mill lining system

2020 1 27 SAG mills generate higher levels of impact reduction and ball mills higher levels of abrading action A mill lining system serves two purposes to protect the mill shell from wear caused by the impact and abrasion of the mill charge and to elevate and tumble the mill contents in the necessary manner to create a grinding action.

Get Price### SAG Mill

2021 10 22 The SAG Mill is a machine added by Ender IO uses Micro Infinity µI to grind or mill items into their crushed variants like Ores into Dusts.The SAG Mill has four output slots recipes can have 1 4 different outputs with different chances of obtaining those outputs Uniquely the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency resulting in

Get Price### Modelling Transfer size limits

2020 3 22 For example the SAG mill may have 10 MW of power draw available and the two ball mills each of 7.5 MW of power draw available for a total of ratio of 10 15 1 1.5 The software uses the particular power model Bond/Barratt Morrell Mi etc to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill

Get Price### Turbo Pulp Lifter TPLTM

2016 3 9 In ABC/SABC circuits the AG or SAG mills are in closed circuit with screens and pebble crushers The mill discharge from these mills consists of slurry which goes to ball mills for further grinding and coarse pebbles/rocks which are crushed and sent back to the mill.

Get Price### Unlike Sag Mills And Ball Mills

Ball Mills And Sag Mill Problem Sagball mill optimization grindingexpert automatically adjust feed rate mill speed and water addition to reduce upsets eliminate grindouts and increase tonnage in sag ball mills we constantly maintain desired operating conditions by monitoring bearing pressure power recycle pebbles mill density and mill.

Get Price### Electronic ear in SAG mill

2004 8 25 We have an application in a SAG Mill where we have installed an electronic ear in order to listen the noise produced by the balls falling to the bottom of the mill Our idea is to convert the amplitude and frequency of noise to a 4 20mA signal or something else in order to determine if the ball is crushing the mineral or the mill lining.

Get Price### 2020

2020 10 15 The mill lube systems will be identical for both mills see Figure 1 Derek White President and CEO of Ascot commented The Ascot team has worked diligently over the summer to complete all of the engineering work to put us in a position to place the order for the SAG Ball mills.

Get Price### CITIC Heavy Industries Co

CITIC HIC has received an order for SAG Mill Ø11m x 5.4m LG 2 x 6 325kW Ball Mill Ø7.9m x 13.6m LG 2 x 8 500kW These mills will 29 August 2008 Gyratory Crusher Order

Get Price### TECHNICAL NOTES 8 GRINDING R

2009 7 30 the mill is used primarily to lift the load medium and charge Additional power is required to keep the mill rotating 8.1.3 Power drawn by ball semi autogenous and autogenous mills A simplified picture of the mill load is shown in Figure 8.3 Ad this can be used to establish the essential features of a model for mill power.

Get Price### TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS

2021 2 17 SAG mills have a power higher than 10 MW Even ball mills have a power larger than 10 MW For this reason they have an important impact in energy consumption and in the operation of the power distribution system Figure 1 Picture of a typical GMD system for a SAG mill Figure 2 presents the power circuit of a cycloconverter fed synchronous motor.

Get Price### The influence of mill speed and pulp density on the

2009 8 26 The pilot mill is also equipped with a sensor measuring the ball and pulp toe and shoulder angles see Figure 3 These data are then used to calculate the total pulp and ball charge angle see Graph 5 Graph 5 clearly illustrates how the ball charge stays quite compact till about 73 solids as the total media angle does not change.

Get Price### Literature Review Gearless Motor Failures A Mill

2014 9 10 The Collahuasi motor was for a 40 ft SAG mill The Antamina 38 ft SAG mill was also driven by an ABB motor and the hanger plates had not failed on that machine after several years of operation Similarly the Sossego motor for the 38 ft SAG mill had not failed It too had an ABB motor and it had operated longer than the Collahuasi motor.

Get Price### Ball Mills Brochure

Ball mills designed for long life and minimum maintenance overflow ball mill sizes range from 5 ft x 8 ft with 75 HP to 30 x 41 and as much as 30 000 HP Larger ball mills are available with dual pinion or ring motor drives Our mills incorporate many of the qualities which

Get Price### ARE SAG MILLS LOSING MARKET CONFIDENCE

2021 8 13 Axb values less than 30 A single SABC line was selected for the grinding circuit with the SAG mill motor rated at 13.4 MW and two ball mills each powered by a 7 MW motor The plant ramp up period started in 2006 and in 2009 the design throughput was yet to be achieved The reported contributing factors were reported as

Get Price### SAG mills

SAG milling extends itself to many applications due to the range of mill sizes available They can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work done by a ball mill SAG mills are also an optimum solution for wet grinding since crushing and screening in these

Get Price### Expande

2021 6 21 Current Problem Challenge Wear monitoring of the internal liners of the SAG mill and ball mills is carried out with different methods and instruments taking advantage of scheduled or unscheduled operational stoppages and is performed by personnel who must enter the equipment Consequences Risk of accidents to people entering the mills.

Get Price### The influence of mill speed and pulp density on the

2009 8 26 The pilot mill is also equipped with a sensor measuring the ball and pulp toe and shoulder angles see Figure 3 These data are then used to calculate the total pulp and ball charge angle see Graph 5 Graph 5 clearly illustrates how the ball charge stays quite compact till about 73 solids as the total media angle does not change.

Get Price### STARTLING EFFECT OF BALL SCATS REMOVAL ON SAG

2020 8 6 the ball scats from a single stage SAG mill These scats are non spherical ball fragments resulting from uneven wear of balls with included porosity 30t of scats were removed from a total charge load of 70t Surveying and modelling the mill revealed that the breakage rates had increased dramatically at the coarser end of the size distribution.

Get Price### TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS

2021 2 17 SAG mills have a power higher than 10 MW Even ball mills have a power larger than 10 MW For this reason they have an important impact in energy consumption and in the operation of the power distribution system Figure 1 Picture of a typical GMD system for a SAG mill Figure 2 presents the power circuit of a cycloconverter fed synchronous motor.

Get Price### Modelling Transfer size limits

2020 3 22 For example the SAG mill may have 10 MW of power draw available and the two ball mills each of 7.5 MW of power draw available for a total of ratio of 10 15 1 1.5 The software uses the particular power model Bond/Barratt Morrell Mi etc to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill

Get Price### Mill drives the desire for increased power and the

2021 9 11 The standard method for sizing secondary ball mills usually the overflow type in AG/SAG circuits follows published mill supplier information with aspect ratios in the range 1 1.5 to 1 2.0 depending upon product sizing and pulp flow i.e the highest expected circulating loads Morrell 2001 The applied net power calculated from testwork

Get Price### 2020

2020 10 15 The mill lube systems will be identical for both mills see Figure 1 Derek White President and CEO of Ascot commented The Ascot team has worked diligently over the summer to complete all of the engineering work to put us in a position to place the order for the SAG Ball mills.

Get Price### SAG mill wear optimization using DEM simulation

2018 3 13 Video 1 Mill Showing Surface Wear Modification Case scenario Consider a large SAG mill with a diameter of 10.97 m as shown in Figure 1a The mill has a high definition line design with alternating lines of high and low elevators Figure 1b The mill processes rocks from 200 mm to 300 mm using 350 mm steel balls as the grinding medium.

Get Price### SAG mill grinding ball

The sag mill grinding ball produced by ZJH minerals is high tech wear resistant products for different mines Our grinding balls are researched relies on the scientific research team composed of experts and scholars in the field of wear resistance sag mill grinding ball has the characteristics of high toughness high strength high wear resistance high corrosion resistance strong impact

Get Price### SAG Mill Grinding Circuit Design

2016 6 6 SAG Mill vs Ball Mill As the diameter and length of mills increased several critical problem areas were identified One of the most important was the severe stressing which took place at the connection of the mill shell and the trunnion bearing end plates which is further aggravated by the considerable distortion of the shell and the

Get Price### What is the difference between a SAG mill and ball mill

Principle of SAG Mill operation 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 6 7 The largest SAG mill is 42′ 12.8m in diameter powered by a 28 MW 38 000 HP

Get Price