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Nov 27 2019 The extraction of minerals starts with the mining of rich ores which are then cut SAG or autogenous AG mills and in ball or rod mills Get Price GrindingMinerals Research Laboratory mills employ steel or ceramic balls or pebbles The autogenous mills are charged with large pieces of the ore itself which c balls or

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Ball mills and rod mills take steel balls and steel bars as their medium but on the contrary autogenous mills make ores themselves be a medium An autogenous mill is featured by combining mid fine crushing with coarse grinding Ores can be crushed and grinded through mutual impact and grinding with themselves as grinding media.

Get Price### Ball Mills vs Rod Mills

Rods in place weigh approximately 400 pounds per cu ft and balls in place approximately 300 pounds per cu ft. Thus quantitatively less material can progress through the voids in the rod mill grinding media than in the ball mill and the path of the material is more confined.

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Grinding mills Ball Mill Vertical Roller Mill for Semi autogenous grinding mill largest As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size reduction requirements including Semi autogenous grinding mill largest quarry aggregate and different kinds of minerals.

Get Price### What s the Difference Between SAG Mill and Ball Mill

Grinding ratio can reach 4000 5000 more than ten times higher than ball rod mill Application Autogenous mills are common in the primary processing unit for the major large grinding circuits in the mining field separates out some precious metals like gold silver Ball mill

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Autogenous Mills And Ball And Rod Mills In Malaysia Autogenous grinding of glass cullet in a stirred mill the effective sizes of sand required for a slow sand filter and rapid gravity filter are 035 mm and 0612 mm respectively pressure filter media requires a rough microstructure to be able to trap the fi Autogenous Mills

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The innovative designs of Vulco© mill liners are tailored specifically for every customer and are manufactured to the highest industry standards for autogenous AG and semi autogenous SAG mills primary secondary and re grind ball and rod mills. With an integrated approach our skilled teams of engineers designers and chemists consider your entire circuit and custom design a Vulco

Get Price### Rod And Ball Millsledermann bruengger

Rod mills operate at lower speed than ball mills since the rods are rolled and not cascaded For an equivalent grind a rod mill uses less steel than a ball mill because of the lower speed and better contact between the media and ore The rod charge must be maintained in good working condition and broken and worn rods must be removed.

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autogenous mill grinding hazards The mill product can either be finished size ready for processing or an intermediate size ready for final grinding in a rod mill ball mill or pebble mill AGSAG mills can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill

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A Method of C alculating Autogenous Semi Autogenous mills with the rod mill and ball mill laboratory work indices Note in Figure 1 that the rod mill product slope is less than 0.5 due to an extra amount of nes present being ﬁ ﬁ ner than 650 μm These ﬁ nes proceed to the ball mill improving the ball mill

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supported grinding mills up to the largest sizes SAG/ball mill circuit incorporating pebble crushers and a POLYCOM high pressure grinding roll SAG and ball mill for gold ore grinding One of three SAG mills with 9.75 m diameter and 2 x 4000 kW drive power These mills operate in conjunction with ball mills for iron ore grinding in Iran.

Get Price### Predicting the specific energy of autogenous and semi

The Bond equation can predict the specific energy with acceptable accuracy for ball and rod mills but as pointed out by Morrell 2004 this law tends to either over predict or underpredict the

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

There are numerous types of mill designs including autogenous semi autogenous ball rod and scrubber mills This guide will refer to the two most common varieties Semi autogenous SAG and ball mills Key considerations Numerous factors must be considered when selecting a mill liner design including required grinding action mill size as

Get Price### What are the differences between ball mill and rod mill

Ball mill and rod mill are suitable for different materials 1 Selection by material s hardness Ball mill has a strong adaptation of material and it is suitable for grinding hard materials such as slag iron ore copper ore etc Rod mill is suitable for grinding brittle material such as rare metals 2.

Get Price### Autogenous and Semi Autogenous MillsScienceDirect

Some dry autogenous mills operating in Canada are 8.5 m in diameter and 1.5 m in length These are known as Aerofall mills The Cadia Hill Australia wet SAG mill is 12.2 m in diameter with a 20 MW motor and in 2004 was the largest diameter mill in operation in the world.

Get Price### Grinding Mills and Their TypesIspatGuru

Grinding Mills and Their Types satyendra April 9 2015 0 Comments autogenous grinding ball mill grinding mills hammer mill rod mill roller mill SAG Grinding Mills and Their Types In various fields of the process industry reduction of size of different materials is a basic unit operation.

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Semi autogenous Outotec SAG mills as they are often called can accomplish the same size reduction work as two or three stages of crushing and screening Often used in grinding at modern mineral processing plants SAG mills reduce the material directly to the desired final size or prepare it for the following grinding stages.

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Overflow Rod Mills Figure 1 Peripheral Discharge Rod Mills Figures 2 and 3 Compartment Mills Rod and Ball Figure 6 Ball Figure 6a Pebble Mill Figure 6b Overflow Ball Mills Figure 8 Diaphragm Grate Discharge Ball Mills Figure 9 I GENERAL MILL DESIGN A Liners The interior surface of grinding mills exposed to grinding media and/or the

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3 Autogenous and semiautogenous mills 3 Ball mills 3 Rod mills 3 Scrubbers 3 Lime slaking machines Wet grinding Dry grinding 3 AEROFALL mills 3 Ball mills 3 Rod mills 3 Separators 3 Dryers 3 POLYCOM high pressure grinding rolls 3 Roller mills As one of the world s leading companies in the plant engineering field ThyssenKrupp

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Product Introduction A wet autogenous mill that materials as grinding media Feeding Particle Size mm Product improvement High efficiency autogenous mill can realize the second and third stage crushing and screening and part or all crushing and grinding of rod mill or ball mil Low power consumption no dust pollution less auxiliary equipment easy production automation and stable

Get Price### RoM BALL MILLSA COMPARISON WITH AG/SAG

II 314 RoM Ball millsa comparison with AG/SAG Milling Aubrey N Mainza1 and Malcolm S Powell 1 1Mineral Processing Research Unit University of Cape Town Rondebosch 7700 South Africa

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

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.

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Concentrators vary similarly A new large concentrator unit typically consists of a semi autogenous grinding mill high pressure grinding rolls two ball mills and a flotation circuit It can treat up to 170 000 tonnes of ore per day Sartain 2010 Larger concentrators consist of

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semi autogenous mills and ball millsMC World Semi Autogenous Mills And Ball Mills ball Mill Autogenous Grinding Mills Ghana Sag is an acronym for semiautogenous 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 128m in Semi

Get Price### What s the difference of Ball mill SAG mill AG mill

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.

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The special characteristics of the Autogenous mill are stated and a suitable type of model for the mill is presented An Autogenous Milling defined as used in this study the term Autogenous

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Rod Mills Grinding Mills Dove Dove rod mill also referred to as steel rod mill shape is similar to dove ball mill and is characterized by the use of steel rods instead of steel balls as grinding media it is highly efficient grinding mill used as dry grinding mill and wet grinding mill dove rod mill consists of five major components including cylinder shell feeding.

Get Price### A Method of C alculating Autogenous Semi

mills with the rod mill and ball mill laboratory work indices Note in Figure 1 that the rod mill product slope is less than 0.5 due to an extra amount of nes present being ﬁ ﬁ ner than 650 μm These ﬁ nes proceed to the ball mill improving the ball mill efﬁ ciency Also the plotted rod mill P80 value as shown in Figure 1 is 2900

Get Price### Autogenous grinding mills AG mills Outotec

AG 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 done by a ball mill AG mills are also an optimum solution for wet grinding since crushing and screening in these cases can be difficult if not impossible.

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AUTOGENOUS AG SEMI AUTOGENOUS SAG AND BALL MILLS S.Morrell Citic SMCC Process Technology Pty Ltd PO Box 337 Indooroopilly Centre Queensland 4068 Australia steve.morrell citic hic The slurry level in AG/SAG and ball mills has an influence on their power draw which in some instances can be profound.

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Autogenous and Semi Autogenous Mills Autogenous AG and Semi Autogenous SAG milling has seen increased use in recent years especially in large mineral processing operations These mills typically have a large diameter relative to their length typically in the ratio or 2 or 2.5 to 1 AG mills employ ore as the grinding media.

Get Price### Autogenous Grinding Semi Autogenous Grinding Circuits

Figure 2 shows a typical conventional crushing grinding circuit with three stages of crushing followed by ball mills or rod mill ball mill combination This flowsheet is typical of many mills that have been built throughout the world Figure 3 shows a typical semi autogenous SAG circuit with feed coming directly from a primary crusher and

Get Price### Autogenous GrindingMining Fundamentals

Autogenous grinding is a process of grinding ore in a rotating cylinder using large pieces of the same ore Autogenous mills operate mechanically like ball mills however the media used for grinding differs Simply put in autogenous grinding the media is also the material that is being ground whereas in other milling methods steel or

Get Price### semi autogenous mills and ball mills

Autogenous Mills And Ball And Rod Mills In Malaysia Autogenous grinding of glass cullet in a stirred mill the effective sizes of sand required for a slow sand filter and rapid gravity filter are 035 mm and 0612 mm respectively pressure filter media requires a rough microstructure to be able to trap the fi Autogenous Mills.

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Starting as small as 13 feet 4 m in diameter on 330 HP and as large as 24 14.5 m in diameter on 3 300 HP the 911MPE Semi Fully Autogenous Mills tumble crushed ore without iron or steel grinding media They are used when the crushed ore pieces are hard enough to perform all the grinding SAG mills tumble mainly ore but they use up to 15 volume of steel balls to assist grinding

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Rely on our proven track record of SAG and AG Mill superiority Since the early 1980s we have been designing and manufacturing Semi Autogenous SAG and Autogenous AG Grinding Mills under the Fuller Traylor brand Semi autogenous grinding uses a minimal ball charge in the range of 6 15 while autogenous grinding uses ore only.

Get Price### AMIT 135 Lesson 6 Grinding CircuitMining Mill

The mill product can either be finished size ready for processing or an intermediate size ready for final grinding in a rod mill ball mill or pebble 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.

Get Price### Autogenous and semi autogenous mill circuits

IntroductionIn autogenous mills grinding of the ore feed is accomplished by the direct action of the variously sized rocks making up the feed on each other and the mill interior Size reduction is achieved without the addition of grinding media foreign to the mill feed differing in this respect from rod ball

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Autogenous mills semi autogenous mills and ball supported grinding mills up to the largest sizes sagball mill circuit incorporating pebble crushers and a polycom high pressure grinding roll sag and ball mill for gold ore grinding one of three sag mills with 9.75 diameter and 4000 kW drive power these mills operate in conjunction with ball mills for iron ore grinding in iran.

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The ball milling process prepared by rod mill sag mill autogenous semi autogenous grinding mill jaw crusher cone crusher and other single or multistage crushing and screening.Ball mill manufacturerWith more than 35 years of experience in grinding balls mill technology JXSC design and produce heavyduty scientific ball mill

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