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Autogenous Grinding Diameter

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

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  • Semi Autogenous Grinding Mill - an overview
    Semi Autogenous Grinding Mill - an overview

    30.3.1 Leaching. As mined ore is typically less than 0.25 m in size. It is ground to a particle size of 80% passing 100 μm in a semi-autogenous grinding mill then sent on to leaching using sulfuric acid and sulfur dioxide under atmospheric conditions. A schematic flowsheet of this

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  • TECHNICAL NOTES 8 GRINDING R. P. King
    TECHNICAL NOTES 8 GRINDING R. P. King

    autogenous grinding machines fracture of the media particles also occurs by both impact (self breakage) and attrition. ... In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the conical ends

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  • Semiautogenous mill liners: Designs, alloys, and
    Semiautogenous mill liners: Designs, alloys, and

    Large-diameter autogenous and semi-autogenous grinding mills represent the primary thrust of the expanding grinding technology. In spite of initial difficulties, large autogenous and semiautogenous mills have reached an acceptable level of technology that provides the mineral engineer with a reliable, low cost means of ore comminution

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  • Copper Concentrator Autogenous Grinding Practices at
    Copper Concentrator Autogenous Grinding Practices at

    grinding circuit was replaced by two autogenous grinding mills (9.8m diameter x 4.4m length) in June 1991. These mills were originally designed to operate in open circuit or

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  • Semi-Autogenous Wet Grinding Modeling with CFD
    Semi-Autogenous Wet Grinding Modeling with CFD

    May 01, 2021 The object of the study is a semi-autogenous grinding mill SAG 34 17 (the diameter of the mill is 34 feet, the length is 17 feet), which processes charges of copper–nickel ores. The ores that make up the charge are divided into 3 conventional types. For each type of

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  • Predicting the specific energy of autogenous and semi
    Predicting the specific energy of autogenous and semi

    Mar 01, 2004 1.. IntroductionIt is generally recognised that the most accurate means for predicting the specific energy of an autogenous (AG)/semi-autogenous (SAG) mill circuit is to pilot the circuit using a 6 ′ 2 ′ mill (Mosher and Bigg, 2001).However, one of the major drawbacks of this approach is that a relatively large sample is required to do so

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  • Autogenous and Semi-Autogenous Mills | FLSmidth
    Autogenous and Semi-Autogenous Mills | FLSmidth

    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. SAG and AG Mills operate by lifting ore/grinding media and dropping it on the

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  • Small-Scale Continuous SAG Testing Using the
    Small-Scale Continuous SAG Testing Using the

    Fully-autogenous (FAG) and semi-autogenous (SAG) mills were first used on ores in the 1950s, but they were not seriously considered by the mining industry until the 1960s. By the 1970s, most designers of new plants considered AG/SAG grinding, even if it was not used in the final grinding circuit design. In the 1980s, many of the

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  • UZTM-KARTEX - Milling equipment
    UZTM-KARTEX - Milling equipment

    Reliability and user-friendliness; Low consumption of lining materials. Dry and wet autogenous grinding rod mills. Key characteristics: Drum diameter (without lining), mm. 2100 - 3600. Drum length (without lining), mm. 3000 - 5000. Rated drum сapacity, m3

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  • GRINDING MILLS - DOMINION ENG WORKS LTD,CA
    GRINDING MILLS - DOMINION ENG WORKS LTD,CA

    An autogenous grinding mill of large diameter has curved lifters to give improved radially inward displacement of reduced material, after passage through the primary grates; and secondary grates in the form of box sections combined with the curved surfaces of the lifters, for segregation of totally reduced fines, with passage of intermediately sized material back to the mill reduction section

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  • Autogenous mills, semi-autogenous mills and ball
    Autogenous mills, semi-autogenous mills and ball

    Autogenous mills, semi-autogenous mills and ball mills for wet grinding. A company of Polysius ThyssenKrupp ... Grinding plants from Polysius have a long track record in wet grind- ... with 9.75 m diameter and 2 x 4000 kW drive power. These mills

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  • US3404846A - Autogenous grinding mill - Google Patents
    US3404846A - Autogenous grinding mill - Google Patents

    An autogenous grinding mill may receive a coarse run of mine rock feed and discharge it as a finished ground sand or slime product. In order to efliciently break down the rock the mill must provide both impact and attrition forces. ... the ratio of the interior diameter of the drum and the interior length being of the order of 3 to 1, means for

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  • AG Autogenous Grinding - Mineral Processing & Metallurgy
    AG Autogenous Grinding - Mineral Processing & Metallurgy

    Aug 06, 2015 In conventional mills the diameter of the mill is smaller than its length. In autogenous mills the diameter is greater than the length. They can be as much as 40+ feet in diameter. Patented in 1959, AG Mills are not so popular any more. This large diameter of mill is required to achieve the impact necessary to grind the ore

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  • Autogenous Grinding & Semi Autogenous Grinding Circuits
    Autogenous Grinding & Semi Autogenous Grinding Circuits

    Jul 20, 2017 Crusher product is typical feed to a ball mill using large diameter balls but not much grinding of 20-25 mm ore can be accomplished in an autogenous mill. Autogenous plus Pebble Mill are an excellent technique if the ore is uniformly hard and competent but it has not been popular because the porphry copper orebodies do not consistently produce sufficient hard, competent pebbles for the

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  • Autogenous Grinding Mill | Sepor, Inc
    Autogenous Grinding Mill | Sepor, Inc

    Designed for autogenous or semi-autogenous grinding, the 6′ X 2′ continuous feed Autogenous or Semi-Autogenous Mill may be used as a pilot plant to determine the size for larger mills or for small scale milling projects. With the appropriate feed, the AG mill can reduce or eliminate the need for grinding media costs and eliminate iron contamination

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  • Autogenous Grinding | Article about Autogenous Grinding
    Autogenous Grinding | Article about Autogenous Grinding

    In autogenous grinding, a distinction is made between ore and ore-pebble grinding. Ore grinding is carried out in mills with a large diameter (up to 12 m) and short length (the ratio of diameter to length is approximately 3). Ore with pieces having dimensions up to 300 mm

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  • Autogenous grinding mills (AG mills) - Metso Outotec
    Autogenous grinding mills (AG mills) - Metso Outotec

    Autogenous mills, or AG mills, 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, AG mills reduce the material directly to the desired final size or prepare it for the following grinding stages

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  • SAG Mill - Semi-Autogenous Grinding Mill
    SAG Mill - Semi-Autogenous Grinding Mill

    SAG Mill - Semi-Autogenous Grinding Mill A SAG mill is characterized by its large diameter and short length. It rotates, tumbling its contents violently , causing a breaking action. The mill is lined with wear resistant steel liners which are fitted with lifters to assist with raising the load

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