### Technical Program

Drill-to-Mill Plant Optimization at Altynalmas Pustynnoye Gold Mine Esen Daniel Dzhalolov Bachramov Geronimo Kalmatayev 19 16 15 Maintaining Consistent Performance from Two Identical SAG Mills Receiving Different Size Distribution Draba Improving Single-Stage SAG Circuit Efficiency and Product Quality Through Finish Grinding Get price

### SAG mill feed size distribution manipulation and

SAG mill feed size distribution manipulation and optimization Question In our Gold Plant we have 2 SAG (tubular 24x16 feet) mills operating in parrallel in closed circuit with hydrocylones the mill feed size is 170mm and flactuates up to 200mm (crusher gap) Get price

### sag mill ball design copper lead zinc ore

Mill (grinding) the free encyclopedia in a ball mill A SAG mill is the ore charge SAG mills are primarily used at gold copper and platinum mines with appliions also in the lead zinc Chat Now sag mill ball design copper lead zinc ore sag mill ball design copper lead zinc ore Get price

### Energy Efficient Comminution Circuits

Rod mill discharge can be equated to SAG mill discharge in terms of product size and product size distribution in SABC circuit (SAG mill with recycle crushing and a single stage ball mill) The sample underwent staged grinding using a laboratory scale rod mill and ball mill to produce samples of product sizes ranging from P 80=0 015 m to P Get price

### Optimization and Control of a Primary SAG Mill Using Real

Optimization and Control of a Primary SAG Mill Using Real-time Grind Measurement C W Steyn* K Keet** Optimization of primary milling circuits through application of model predictive control has been implemented the primary mill product in an attempt to control and possibly reduce flotation feed size Get price

### New project in Russia with semiautogenous mill selected

New project in Russia with semiautogenous mill selected according to the results of SAGDesign testing optimization are also given 2 control of SAG mill final grind size (transfer product – T80) and final screening before centrifugal separation 5 Get price

### Improved Relationships for Discharge in SAG/AG Mills

There is currently no accepted pilot test procedure for measuring discharge and product size distributions in AG/SAG mills The existing models and understanding of grate discharge and classification are known to be flawed and have been identified as one of the key limitations in AG/SAG Get price

### KnowledgeScape

Also if underloaded significant throughput will be lost in the fine and mid-size fractions as the surface area for attrition is reduced Typically SAG mill control is performed with respect to bearing pressure and other process variables which are used to estimate volumetric loading in order to optimize the mill Get price

### KnowledgeScape

Even though production was dramatically improved the product size of the secondary ball milling was reduced and recovery increased The results in SAG-Mill line 2 are even more dramatic Because of segregation on the coarse feed stockpile SAG-mill 2 receives a higher percentage of coarse material Get price

### Freda Rebecca SAG milling circuit optimisation

ABSTRACT Simulation work was carried out to analyse how feeding a finer size distribution to a single stage SAG mill in closed circuit with hydro cyclones at Freda Rebecca Gold Mine would affect throughput and specific energy consumption using an Excel based milling process simulator developed by Hinde a comminution specialist who has worked Get price

### Comminution Services

autogenous grinding as well as to SAG mill primary grinding In the SAG mill testwork when the steel is added the SAG product classification size and ore feed size distribution is varied If necessary pebble crushing or mill speed can also be investigated All tests are evaluated on the basis of feed rate power consumption and product size Get price

### how does the sag mill works

How Does A Sag Mill Work - antwerpsehavenpijl How Does The Sag Mill Works Christoartfairnl How does the sag mill works june 15 09 by cnmining 29 comments How does a sag mill work hot products ball mills are used primary for single stage fine grinding regrinding and as the second stage in two Read Get price

### AG Mill SAG Mill_CITIC HIC

Autogenous mills(AG Mill)/ semiautogenous mills(SAG Mill) The CITIC autogenous / semiautogenous mills are utilized to grind run-of-mine rock or primary crusher discharge The feed size to this mill is limited to the maximum size that can be practically conveyed and introduced into the mill Get price

### Outotec MillSense mill charge sensor system

The mill charge volume has a great impact on grinding efficiency For efficient grinding autogenous (AG) and semi-autogenous (SAG) mills need to be operated with the correct charge in order to maximize their throughput while avoiding overloading The Outotec MillSense sensor system gives a precise indication of the mill charge volume Get price

### THE OPTIMAL BALL DIAMETER IN A MILL

The optimal ball diameter in a mill 333 The grinding efficiency of the narrow particle size fractions with ball charge of various diameters has been observed through the constant of milling rate k in the equation of the grinding kinetics law for the first order grinding R=R 0 Get price

### Application of Operating Work Indices in Autogenous

terms such as "SAG mill inefficiency factor " As ore breakage characteristics can be a major factor in AG/SAG mill product size distribution Figure 2 compares only data for porphyry ores Before the true power efficiency of an AG/SAG grinding mill can be properly assessed by using the Wio concept the T 80 used for calculations must be Get price

### grinding steel ball for sag and ag mill

SAG Mill A line drawing of the Fort Knox SAG mill liner configuration and spare liners awaiting installation Five and one quarter inch steel grinding balls - cannon balls - occupy 8% of the mill volume and are consumed in the grinding action at the rate of 600 000 pounds per month Get price

### Metallurgy Mineral Processing

Mine-to-mill optimisation effect of feed size on mill throughput No 48 SRK Consulting's International Newsletter One of the most valuable aspects of blasting is the generation of very fine particles (e g smaller than 12mm) that will pass through the primary mills and onto the secondary ball mill circuits alleviating a common bottleneck Get price

### The ABC of Mine to Mill and metal price cycles

22-2-2017Accurate and reliable online particle size monitors and sampling stations to sample and measure the particle size distribution and per cent solids of the total grinding circuit classifier product Acoustic monitoring software to monitor operating conditions in SAG mills and allow optimisation Get price

### sag mill vs ball mill

AG/SAG mills 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 of a ball mill Because of the range of mill sizes available AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill/ball mill circuit A diagram of types of AG/SAG Get price

### Outotec Grinding Mills

We offer autogenous (AG) semi-autogenous (SAG) ball rod and pebble mills in sizes ranging from kWs up to 30+ MW Our product range also includes a number of unique solutions including the world's largest acid-resistant grinding mills which can operate with extremely corrosive slurry Get price

### Optimizing Performance of SABC Comminution Circuit of the

mill Crusher (SABC) This circuit shows a semi-autogenous grinding (SAG)/ball mill circuit where both grinding mills are in closed circuit with the SAG mill closed with a crusher to control the amount of 'critical size' material in the circuit 'Critical size' material also referred to as pebbles represents Get price

### sag mill and a closed circuit ball mill

The feed size for these mills is limited to the maximum size that can be practically conveyed and introduced into the large mill feed chutes And the product of the large AG/SAG grinding is either a finished size ready of processing or an immediate size for further grinding in a ball mill pebble mill or a VERTIMILL or a stirred media Get price

### Gearless mill drives

ABB's GMD is the most powerful mill drive system in the market to power semiautogenous (SAG) ball and autogenous (AG) mills This 'workhorse' for grinding operations combines a robust service-friendly and fit for purpose design to provide highest throughput reliability Get price

### Mineralogy for Optimising Mineral Processing

The circuit consists of top-size control crushing ahead of semi-autogenous milling which also incorporates pebble crushing A portion of the SAG mill feed is crushed to –25mm to increase throughput through the mill Product from the SAG mill circuit is further ground in ball mills before being delivered to the flotation circuit Flotation Get price

### Dynamic modeling and simulation of a SAG mill for mill

The modeling and simulation of semiautogenous (SAG) mills have been widely used in the design and optimization of mill performance in terms of its power draw processing capacity and product size distribution However these models are solved under steady approximation and do not provide any information on mill charge distribution in real time Get price

### Outotec Grinding technologies

Outotec Grinding technologies (SAG) mills autogenous (AG) mills ball together with feed and product size distribution is necessary to optimize mill sizing and design for specific applications Using Outotec's combined expertise in grinding in-house sizing programs and grinding Get price

### Blast fragmentation for maximizing the SAG mill

The crusher product was then subjected to segregation as it occurred in the stockpile during the test work The segregated sag mill feed size distributions which were then submitted to the sag mill model to estimate the sag mill throughput The details of the blast designs and the resultant mill throughput from the simulations are shown in Table 3 Get price

### Energy Efficient Comminution Circuits

Rod mill discharge can be equated to SAG mill discharge in terms of product size and product size distribution in SABC circuit (SAG mill with recycle crushing and a single stage ball mill) The sample underwent staged grinding using a laboratory scale rod mill and ball mill to produce samples of product sizes ranging from P 80=0 015 m to P Get price

### (PDF) Optimization of mill performance by using

Optimization of mill performance by using J o online ball and pulp Figure 5 shows the evolution of the mill discharge product size in relation to the lifting effect of the liners W Slurry pooling and transport issues in SAG mills It is able to finely follow independently Get price

### RESPONSE OF PRIMARY GRINDING MILL PERFORMANCE TO

content is available to mill operations for control purposes leading to periods of lower throughput instability variable product size and accelerated mill liner and lifter wear In response to this need CSIRO has developed an on-line surface vibration monitor for primary grinding mills which produces Get price

### THE OPTIMAL BALL DIAMETER IN A MILL

The optimal ball diameter in a mill 333 The grinding efficiency of the narrow particle size fractions with ball charge of various diameters has been observed through the constant of milling rate k in the equation of the grinding kinetics law for the first order grinding R=R 0 Get price

### Dynamic modeling and simulation of a SAG mill for mill

The modeling and simulation of semiautogenous (SAG) mills have been widely used in the design and optimization of mill performance in terms of its power draw processing capacity and product size distribution However these models are solved under steady approximation and do not provide any information on mill charge distribution in real time Get price

### KnowledgeScape

The key mill performance data is summarized in the following table Clearly the KnowledgeScape adaptive grinding control with has significant financial benefits Using the KnowledgeScape adaptive SAG mill expert system on the grinding circuit operations staff achieved a 2 8% increase in feed rate Get price