# factor affect sag mills

...### SAG Mill Grinding Circuit Design

Jun 06, 2016· SAG mills have a higher installed power density for a given plant footprint relative to AC mills. With the combination of finer grind and a lower installed power density (based on the lower density of the mill charge), a typical AG mill has a lower

Ask for price### Factor Affecting Characteristic of Voltage Sag Due to

3 Factors Affecting Sag Characteristics 1. Type of fault: Type of fault in the power system is the first factor which affects sag characteristic. Depending whether the fault type is balanced or unbalanced, sag will be balanced or unbalanced in all three phases. The magnitude and phase angle of sag will also depend on the type of fault [2]. 2.

Ask for price### Modelling: Transfer size limits SAGMILLING.COM

The model assumes all SAG mills are variable-speed; if a fixed-speed mill encounters this condition, it will completely grind out and operators will probably be forced to stop the SAG mill. The actual factors that affect transfer size, such as grate dimensions, screen apertures and ore breakage rates, are not part of the power-model toolkit

Ask for price### Autogenous and Semi-Autogenous Mills ScienceDirect

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

Ask for price### Sag & Tension in overhead Line? Definition & Factors

May 25, 2016· Tension -The sag is inversely proportional to the tension in the conductor. Higher tension increases the stress in the insulators and supporting structures. Wind It increases sag in the inclined direction. Temperature The sag is reduced at low temperatures

Ask for price### Optimizing your SAG mill operation International Mining

Mar 21, 2007· Similar to the impeller design affecting pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of AG and SAG grinding mills. Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm).

Ask for price### Factors Affecting Ball Mill Grinding Efficiency

Oct 25, 2017· Impact breakage may occur as a result of a particle being smashed between balls or between a ball and the mill lining, but is also generally defined to include slow compression fracturing, or crushing of particles between grinding media.

Ask for price### Grinding Mills an overview ScienceDirect Topics

SAG mill product feeds two parallel ball mills of 6.6 Pulverizer Wear Allowance: A final factor affecting pulverizer system design is a “capacity margin” that would compensate for loss of grinding capacity as a result of wear between overhauls of the pulverizer (Figure 4.6). A typical pulverizer-sizing criterion is 10% capacity loss due

Ask for price### A Method of C alculating Autogenous/ Semi-Autogenous

of the energy required by a SAG mill. Put another way, the SAG mill energy required according to this statement, is 2.5 times more than the Ab value to produce the same degree of particle breakage. There is a speci ﬁ c gravity factor that affects AG/SAG power

Ask for price### factors affecting the performance of the sag mill

the SAG mills throughput, power consumption and accordingly, speciﬁc energy. The feed size distribution together with the ore characteristics (hardness, lithology, alterations, etc.) are the most important factors affecting the SAG mills performance. Some oper-ations have recognised an opportunity in the relationship between. Get Quote

Ask for price### Improving Autogenous/Semi-Autogenous Grinding

principal factors that cause inefficient grinding in AG/SAG mills, which are summarised in Table 1. The effects of each of these factors on energy efficiency in grinding mills are discussed here. Flow-back and energy efficiency Flow-back is the inevitable phenomena associated with the conventional pulp lifter designs radial and curved

Ask for price### Modelling: Transfer size limits SAGMILLING.COM

The model assumes all SAG mills are variable-speed; if a fixed-speed mill encounters this condition, it will completely grind out and operators will probably be forced to stop the SAG mill. The actual factors that affect transfer size, such as grate dimensions, screen apertures and ore breakage rates, are not part of the power-model toolkit

Ask for price### Dynamic modelling and simulation of semi-autogenous mills

Jan 01, 2009· The proportion of grinding media is another factor affecting mill operation. It has undergone an important evolution lately. Originally it was considered that a SAG mill should work at 8–10% ball content. Later-on, larger mill sizes and larger

Ask for price### Optimizing your SAG mill operation International Mining

Mar 21, 2007· Similar to the impeller design affecting pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of AG and SAG grinding mills. Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm).

Ask for price### A Method of C alculating Autogenous/ Semi-Autogenous

of the energy required by a SAG mill. Put another way, the SAG mill energy required according to this statement, is 2.5 times more than the Ab value to produce the same degree of particle breakage. There is a speci ﬁ c gravity factor that affects AG/SAG power

Ask for price### Grindin' at the Mill investigating bottleneck in

The SAG mill feed is controlled by the mill weight, measured by 4 load cells on the mill bearing system. Therefore if the ore does not grind quickly enough in the SAG mills, the mill weight increases and the control system reduces feed to the mill to maintain the desired mill weight. There are multiple factors that can affect mill

Ask for price### Mill Filling Prediction tool addresses productivity

Apr 02, 2020· SAG mills are a key asset for mineral processing operations as one of the critical stages of extracting mineral out of ore, and their continued stable operation is central to productivity. However, the performance of a SAG mill changes rapidly in response to conditions such as feed size and hardness as well as longer-term variability due to

Ask for price### Six factors affecting the output of grinding mill

Aug 16, 2020· The grinding mill is one of the important mining machines. When grinding materials, the output of grinding mill will be affected by many factors, mainly by the particle size of the finished product, the hardness of the material, the humidity of the material, the composition of the material, the viscosity of the material, the working efficiency of the supporting measures of the equipment, etc.

Ask for price### Application of Operating Work Indices in Autogenous

in the AG/SAG mill product that can be considered as final circuit product, or Fines Fraction. The Fines Factor is the Fines Fraction expressed as a percentage of circuit feed (Q). T1’ is the 80% passing size of the Fines Fraction. • Q2 is the fraction of material in the AG/SAG mill product that needs additional grinding in the ball mill,

Ask for price### TECHNICAL NOTES 8 GRINDING R. P. King

LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the

Ask for price### Operation Analysis of a SAG Mill under Different

Oct 09, 2020· the inﬂuence of these factors on speed, lining board, ﬁll level ratio, and steel ball diameter of a SAG mill. Li [7] controlled the cone crusher’s eccentric speed and closed side setting (CSS) parameters in the semi-autogenous grinding process by dynamically modeling the SAG mill-pebble crusher loop to improve the SAG mill throughput.

Ask for price### 4 factors that affect milling machining accuracy

Apr 19, 2016· 4 factors that affect milling machining accuracy. Everyone is very concerned the machining accuracy in milling process.How to make precision to meet quality requirements,how to reduce the external factors for precision machining,we must consider all this problems before

Ask for price### Improving Autogenous/Semi-Autogenous Grinding

principal factors that cause inefficient grinding in AG/SAG mills, which are summarised in Table 1. The effects of each of these factors on energy efficiency in grinding mills are discussed here. Flow-back and energy efficiency Flow-back is the inevitable phenomena associated with the conventional pulp lifter designs radial and curved

Ask for price### Dynamic modelling and simulation of semi-autogenous mills

Jan 01, 2009· The proportion of grinding media is another factor affecting mill operation. It has undergone an important evolution lately. Originally it was considered that a SAG mill should work at 8–10% ball content. Later-on, larger mill sizes and larger

Ask for price### Modelling: Transfer size limits SAGMILLING.COM

The model assumes all SAG mills are variable-speed; if a fixed-speed mill encounters this condition, it will completely grind out and operators will probably be forced to stop the SAG mill. The actual factors that affect transfer size, such as grate dimensions, screen apertures and ore breakage rates, are not part of the power-model toolkit

Ask for price### SINGLE STAGE SAG/AG MILLING DESIGN Orway

SAG/AG milling option is ideal for starter projects with significant exploration and expansion potential. Currently a number of the largest SAG mills designed are installed in single stage configuration. This paper discusses the challenges associated with the process design of single stage SAG/AG milling circuits, the design flexibility required to

Ask for price### Semi Autogenous and Autogenous Grinding Mills Market

As a result, SAG mills are ideal for treating wide variety of feed materials as well as sticky ores. Semi-Autogenous and Autogenous Grinding Mills (SAG Mills) Market: Drivers. One of the key factors driving this market is the need for energy efficient solutions as grinding is one of the most energy consuming stages in mining.

Ask for price### TECHNICAL NOTES 8 GRINDING R. P. King

LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the

Ask for price### Six factors affecting the output of grinding mill

Aug 16, 2020· The grinding mill is one of the important mining machines. When grinding materials, the output of grinding mill will be affected by many factors, mainly by the particle size of the finished product, the hardness of the material, the humidity of the material, the composition of the material, the viscosity of the material, the working efficiency of the supporting measures of the equipment, etc.

Ask for price### Factors affecting wear in tumbling mills: Influence of

Apr 01, 1988· Factors that affect ball wear can be summarized under three headings: (1) the ore --where hardness (abrasiveness), mineralogy, e.g., the presence of corrosive species, and particle size are the more important parameters; (2) the mill -- where composition, microstructure and mechanical properties of the balls and liner, quantity and size of

Ask for price### Sag and Tension in overhead transmission line

Mar 28, 2020· SAG. The difference in level between the points of supports and the lowest point on the conductor is known as sag. If the sag is very small compared to the span, its shape is parabola. The factor affecting the sag in the overhead transmission line are as follows: Weight of the conductor: Heavier the conductor, greater will be the sag. In case

Ask for price### Factors Influence Ore Grinding Mill Efficiency JXSC Mining

May 10, 2019· Grinding mill medium is the main factor affecting grinding efficiency. In industrial production, the type, shape, size ratio and filling rate of grinding medium should be determined according to the grain size characteristics, hardness characteristics and

Ask for price### Optimization of a SAG Mill Energy System: Integrating Rock

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

Ask for price### Grindin' at the Mill investigating bottleneck in

The SAG mill feed is controlled by the mill weight, measured by 4 load cells on the mill bearing system. Therefore if the ore does not grind quickly enough in the SAG mills, the mill weight increases and the control system reduces feed to the mill to maintain the desired mill weight. There are multiple factors that can affect mill

Ask for price### 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.

Ask for price### Operation Analysis of a SAG Mill under Different

Oct 09, 2020· the inﬂuence of these factors on speed, lining board, ﬁll level ratio, and steel ball diameter of a SAG mill. Li [7] controlled the cone crusher’s eccentric speed and closed side setting (CSS) parameters in the semi-autogenous grinding process by dynamically modeling the SAG mill-pebble crusher loop to improve the SAG mill throughput.

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