strontium sag mill

SAG Mill Components

SAG Mill Components. Once the basic operating conditions have been defined for the mill designer then, and only then, can he begin taking into account shell and head stresses and trunnion bearing sizes required to carry the load and to give the required openings for feeding and discharging the mills. Mill heads are key structural …

Feed Size VS Ball Size

xG is the mill feed d80, not the circuit feed. For SAG mill, the xG value has to be determined by scalping of the full size distribution. The particles larger than the minimum pebble size (given by the pebble extraction grate opening) has to be excluded from the distribution to calculate the top ball size!

Grinding & Classification Circuits

I think in ball mills you can use steel balls which are very resistant to wear rates, but in SAG mills its tricky as the accumulation of small steel balls due to low wear rate in the mill will affect so much your power draw, meaning that your power draw will be high whilst grinding efficiency is reduced as in SAG mills you need larger steel balls, this will cause a …

How to Improve SAG Mill Tonnage

To Improve SAG Mill Tonnage but at the risk of being laughed at, another option not used much is to treat the SAG as an AG mill. Use the hard ore as the main grinding media. A fully autogenous (AG) circuits can operate at much lower operating costs, but with limited throughput. ... Bob2GLTech started Strontium Electrowinning. J. Jorge replied ...

Energies | Free Full-Text | Operation Analysis of a SAG …

As one of the machines widely used in mining, a semi-autogenous grinding (SAG) mill can significantly improve the roughing efficiency of rock. But the SAG mill still faces the obstacles of significant …

Low SAG Mill Critical Speed

A well implemented SAG control philosophy should be able to vary the mill speed, in response to variations in feed characteristics. If the feed ore becomes softer, then the mill control system should respond to reduce the mill speed. You may not need to keep adding grinding media either, if the issue persists too long.

SAG Mill Operating Work Index

A SAG mill operates with a 10000 hp motor. Typical power draw is 80% of maximum. The 80% passing feed size to the mill is 5 inches and the mill discharge has an 80% passing size of 2.1mm. ... Bob2GLTech started Strontium Electrowinning. J. Jorge replied to Elution cycle taking too long to complete - Zaadra. Proman replied to How to Evaluate ...

Grinding & Classification Circuits

As secondary ball mills are usually fed a relatively (compared to SAG mills) fine F80 and have high re-circulating loads and produce product fineness of the P80 - 100 to 160 micron range, fitting a grate discharge needs to be carefully considered. ... Bob2GLTech started Strontium Electrowinning. J. Jorge replied to Elution cycle taking too long ...

SAG Mill Grinding Circuit Design

Outotec MillSense real-time mill charge analyzer

The attached photo shows the sensor and transmitter moments before mill start-up. So far, we have tried the new and improved MillSense on 6 SAG and AG mills around the world, and all installations have been successful. Don't hesitate to ask if you require more information about MillSense or other Outotec products!

SAG mill VS Ball & Rod Mill

SAG mills are used predominantly with feed material with a larger max lump sizes (from primary crushing plant typically in the max lump size range 150 mm to 300mm and a psd to follow) and the ball or rod mills are for smaller feed lump sizes. ... Bob2GLTech started Strontium Electrowinning. J. Jorge replied to Elution cycle taking too long to ...

SAG Mill Ball Sizing

With high aspect ratio SAG mills total charge to ball charge ratio should be greater than 2 (up to 2.5) for a coarse mill feed (say F80 > 110 mm). If the mill feed size is fine, say 50 mm or 30 mm, then you are looking at a total charge to ball charge ratio of about 1.5-1.6. ... Bob2GLTech started Strontium Electrowinning. J. Jorge replied to ...

Why & where to use Metal Liner & Rubber Liner in grinding mill

The way the rubber technology has evolved over the last 30 years, I would tell you that you can use rubber in virtually any ball mill, pebble mill, and most rod mills. In SAG mills the limits are in the size of the mills (larger tend to go to steel) and the top size of the balls (larger tend to go to steel).

SAG Mill Process Control

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 …

Difference Between Sag Mill vs Ball Mill

1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used to grind the pieces of raw material into. powder-like structures. 3.

Calculating Power Draw when sizing Ball Mills

On the other hand, for SAG mills with grate discharge, the charge level is a bit more variable, so you do sometimes see higher SAG mill power or mill load levels at higher circulating loads. This why the cyclone feed pump or cyclone cluster is often the bottleneck in capacity-constrained ball mill circuits, but mill load or power draw is often ...

Comparison of Magnetic Materials | First4Magnets

3 - Ferrite (Fe3O4) Ferrite is manufactured using powder sintering technology and is sintered using exact size tooling into a range of industry standard sized discs, rings and block shapes. An industry sized block is a 150mm x 100mm x 25mm. These blocks can then sliced into smaller magnets or ground to tighter tolerances.

SAG Mill Components

SAG Mill Components. Once the basic operating conditions have been defined for the mill designer then, and only then, can he begin taking into account shell and head stresses and trunnion bearing sizes …

Crushing & Screening Questions and Answers for Discussion and …

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN. Use Add New Topic to ask a New Question/Discussion about Crushing. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.

SAG Mill | Autogenous and Semi-Autogenous Mills | FLSmidth

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

Converting a Polymet Mill Liner to Full Steel on SAG Mill

Example: a 26' ø × 11' EGL SAG mill with a 6" effective thickness polymet liner might draw 2,917 kW whereas as a 4.5" effective thickness steel liner might draw 2,991 kW. If you know the power draw and effective thickness of your current liners, use the ratio of (diam new / diam old)^2.5 to get a rough estimate the multiplier (for the same ...

SAG Milling

The main drawback of SAG - high power consumption. To reduce power consumption, I think: The right determine of SAG feed size. This depends on the mill diameter and the ball size. Feed size necessary to take 80% of the maximum piece of ore that will crushed by the balls. For the big SAG more than 8 meters optimal feed size will be - 50mm.

SAG Mill Pulp Dischargers

Modern Semi-Autogenous (SAG) Grinding Mills can be up to 12 metres in diameter (absorbing up to 20 MW of power) and need to discharge over 2500 tonnes per hour of solids via pulp lifters. Pulp lifters take the form of a radial array of "box-section" channels mounted inside the discharge end wall of the mill.

Grinding & Classification Circuits

Ball Mill Media (kg/kWh) = 0.0944*Ai^0.299. Aidan Giblet and J. Seidel published a paper on the 2011 SAG conference (MEASURING, PREDICTING AND MANAGING GRINDING MEDIA WEAR) and they obtained. Ball Mill Media (kg/kWh) = 0.0817x(Ai)0.498. the two equations are very similar.

Grinding & Classification Circuits

The power the mill consumes is a function of the ore and/or ball charge geometry and the mill speed. The motor only supplies the amount of power (or torque really) that the mill demands, and we add some extra power to the motor to deal with 'upset' conditions like a change in ore density or a surge in ore level inside the mill.

SAG Mill for Small Operation

Yes, there is no ball mills in that grinding circuit. The p80 to the SAG mill was at about 6" while its product (flotation feed) was at 40 microns. So the answer to your question is yes, a SAG mill can be installed in an operation milling 2,000 tpd and it can be operated efficiently if the operators have the knowledge to operate it well.

SAG Mill Ball Sizing

Typical SAG mill charge contains between 8% and 12% ball charge. Just looking at your F80, the feed is very coarse and I would think of reducing the F80 to increase the amount …

SAG mill and Pebble mill

SAG mill there will be either steel balls or harder ore as grinding media . There may not be any cone crusher for grinding the vibrating screen oversize and the same is recirculated back to SAG .If the mine has also harder ore and majority softer ore, the harder ore may be utilised as grinding media after size reduction with necessary intermediate bin.

Power-based modelling of single-stage AG and SAG mill …

Most empirical comminution models are calibrated to two-stage AG/SAG mill and ball mill circuits -- this work compares the performance of several commonly used power-based …

PARAMETER OPTIMIZATION OF LARGE SAG MILL …

The authors analyze the influence of the semi-autogenous (SAG) mill parameters on the mill grinding efficiency, energy consumption and the tangential …