Ball mill： Ball mills are the most widely used one. Rod mill： The rod mill has the highest efficiency when the feed size is
WhatsAppGet PriceGet A Quote
A Bond ball mill work index is then performed on the mill product for the design of SAG-ball mill circuits. This is important because it was found that there was a 1–1.5 kWh/t higher ball mill work index if the –3.35 mm ball mill test feed size is obtained by SAG mill grinding compared with crushing.
WhatsAppGet PriceGet A Quote
Used SAG Mills For Sale EquipmentMine. UNUSED METSO 36 X 23 AG Mill w1500 KW Motor and 22 X 41 Regrind Ball Mill 13405 HP Total Power UNUSED FLSMIDTH 40 x 25 Gearless SAG Mill and 26 x 406 Ball Mills BOLIDENALLIS CHALMERS 73m X 274m SAG Mill METSO 96X 194EGL Wet Overflow Regrind Ball Mill. See Details >
WhatsAppGet PriceGet A Quote
Ball Mill And Sag Mill Construction Company. 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.
WhatsAppGet PriceGet A Quote
Sag And Ball Mill - eamir.pl. Ball mill wi test on sag ground ore from the first or sag stage of the test. the sag stage therefore had to use enough material to do the bond wi test. to ensure this, the sagdesign sag mill was designed to be 488 mm 19.2 in diameter and 163 mm 6.4 long egl. other design parameters for the sagdesign sag mill were selected to.
WhatsAppGet PriceGet A Quote
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 tons per day the energy expenditure in grinding is 50 percent of the cost of production of the metal. A research team from
WhatsAppGet PriceGet A Quote
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. Amstar SAGAG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
WhatsAppGet PriceGet A Quote
SAG mills of comparable size but containing say 10% ball charge (in addition to the rocks), normally, operate between 70 and 75% of the critical speed. Dry Aerofall mills are run at about 85% of the critical speed.
WhatsAppGet PriceGet A Quote
The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill’s
WhatsAppGet PriceGet A Quote
respect with SAG mills being increasingly less sensitive as the ball charge is increased (Morrel S and Valery W, 2001). 2.2. EFFECT OF FEED SIZE DISTRIBUTION ON SAG MILLING The qualitative effect of changes in particle size distributions (PSD) on the SAG mill performance can be addressed by using the grind curves. The operation of SAG mills is
WhatsAppGet PriceGet A Quote
SAG mills of comparable size but containing say 10% ball charge (in addition to the rocks), normally, operate between 70 and 75% of the critical speed. Dry Aerofall mills are run at about 85% of the critical speed.
WhatsAppGet PriceGet A Quote
mill speed and shell liner/lifter simulations and, particularly, ball charge volume and ball top size, both of which are dependent upon the contingency applied to the transfer size in the SAG circuit product. Iterations of these para-meters can be performed in some models (e.g., DJB’s “Reduced Recovery” and “Millpower2000”) to determine
WhatsAppGet PriceGet A Quote
other methods. The ball mill correction factor (CFnet) is empirical and one way of estimating it was presented by Amelunxen at the Procemin 2013 Short Course by Doll & Amelunxen. The SGI equation uses a transfer size between a SAG and ball mill; it is proposed that a synthetic transfer size of 2100 µm be used to model single-stage SAG mills. 5.9ˇ
WhatsAppGet PriceGet A Quote
Attrition mill is a type of grinding mill by kinds of media to crush lump to powder-like substances. The impact can be rock on rock such as in an Autogenous Grinding (AG) mill, rock and a small ball charge (~10%), used in Semi Autogenous Grinding (SAG) mills, balls of various sizes in Ball Mills and less commonly these days, steel rods in Rod Mills.
WhatsAppGet PriceGet A Quote
Ball Mill And Sag Mill Construction Company. 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.
WhatsAppGet PriceGet A Quote
The ball mill accepts the SAG or AG mill product. Ball mills give a controlled final grind and produce flotation feed of a uniform size. Ball mills tumble iron or steel balls with the ore. The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds. The feed to ball mills (dry basis) is typically 75 vol
WhatsAppGet PriceGet A Quote
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
WhatsAppGet PriceGet A Quote
SAG Ball consumption is “average” at 400 g/t while Ball Mill grinding media (3″ balls) usage in 550 g/t. Yet, you add steel and nothing seems to happen, tonnage is not noticeably improved. You need more tonnage and could actually use a larger/coarser transfer size from the SAG to Ball Mill.
WhatsAppGet PriceGet A Quote
to 40 ft diameter in multiple SAG mills, and ball mill sizes varied from 7 ft to 27 ft in diameter. Calculated SAG pinion energy for full scale plant benchmark tests were within 3% of actual plant power consumption when SAG feed samples are tested using the SAGDesign test. The test method reproducibility is also 3%. As a result, this technology should therefore be considered for every new SAG
WhatsAppGet PriceGet A Quote
Before making a change in the SAG mill ball size it is important to test it first in simulation.
WhatsAppGet PriceGet A Quote
Large size grinding ball for SAG mill Published on April 3, 2015 April 3, 2015 • 0 Likes • 0 Comments
WhatsAppGet PriceGet A Quote
By combining with SAG discharge and screening on the SAG discharge screens, top size control to the ball-mill circuit feed is maintained while still unloading the SAG circuit (Mosher et al, 2006). A variant of this method is to direct pebble-crushing circuit product to the ball-mill sump for secondary milling: while convenient, this has the disadvantage of not controlling the top size of feed
WhatsAppGet PriceGet A Quote
The ball mill accepts the SAG or AG mill product. Ball mills give a controlled final grind and produce flotation feed of a uniform size. Ball mills tumble iron or steel balls with the ore. The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds. The feed to ball mills (dry basis) is typically 75 vol
WhatsAppGet PriceGet A Quote
SAGDesign testing provides SAG pinion energy grindability in kWh/t to within +/- 5% from 152 to 1.7 mm, and Bond Ball Mill Work Index on SAG ground ore, from the SAG test on the same sample. Starkey & Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client’s own ore samples.
WhatsAppGet PriceGet A Quote
In Grinding, selecting (calculate) the correct or optimum ball size that allows for the best and optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do. Often, the ball used in ball mills is oversize “just in case”. Well, this safety factor can cost you much in recovery and/or mill liner wear and tear.
WhatsAppGet PriceGet A Quote
SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9% to 20%.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially. Interior of the drum uses the lifting plates. These plates
WhatsAppGet PriceGet A Quote
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.
WhatsAppGet PriceGet A Quote
A flowsheet of this circuit is shown in Figure 2 and comprises a SAG mill in closed circuit with a pebble crusher. The feed size distribution is taken from the JKTech library of typical feed size
WhatsAppGet PriceGet A Quote
SAG mills (semi-autogenous grinding mills) TON. 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.
WhatsAppGet PriceGet A Quote
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
WhatsAppGet PriceGet A Quote
WhatsAPP 24h online service
24h Online Chat
