• Ball Mill vs Rod Mill | How To Choose Ball Mill or Rod

    As grinding equipments, ball mills and rod mills are both high efficiency grinding equipments Their common points are: 1 They have the same function, they are all used to grind materials, so that the materials can reach the state of powder; 2 The shape of ball mills and rod mills are similar, they are all horizontal and rotatable cylinder; 3 The overall design of ball mills and rod mills

  • What are the differences between ball mill and rod mill

    3 In the twostage grinding process, rod grinding machine is generally used as the first grinding equipment, which has the advantages of larger production capacity and higher efficiency Recommendation of ball mill and rod mill Ball mill and rod mill are suitable for different materials 1 Selection by material's hardness

  • A Method of C alculating Autogenous/ SemiAutogenous

    No 1 rod mill/ball mill circuit was operating very effi ciently when comparing the combined operating work indices for both mills with the rod mill and ball mill laboratory work indices Note, in Figure 1, that the rod mill product slope is less than 05 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

  • What's the Difference Between Ball Mills and Rod Mills

    19/11/2019· The rod mill adopts overflow type and open type discharge, does not use grate type discharge The diameter of the rod mill discharge end is larger than that of the same size ball mill When the rod mill speed is lower than the working speed of the same size ball mill, the medium in the rod mill is in a sloping working state

  • Technical Performance and Application of Ball Mill and Rod

    Unlike the ball mill, the grinding medium in the rod mill is a steel rod, so the working characteristics are significantly different from those of the ball mill Since the steel balls are in point contact, the steel rods are in line contact When the steel rods are sandwiched between the steel rods, the coarse particles are first broken, and the fine particles are protected to some extent On

  • Mill (grinding) Wikipedia

    Rod mill A rotating drum Rod mills are less common than ball mills for grinding minerals The rods used in the mill, usually a highcarbon steel, can vary in both the length and the diameter However, the smaller the rods, the larger is the total surface area and hence, the greater the grinding efficiency Autogenous mill Autogenous or autogenic mills are socalled due to the selfgrinding

  • Related items: Mortar and pestle, Expeller, Extruder
  • (PDF) Predicting the overall specific energy requirement

    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 overpredict, or underpredict the

  • Differences Between Ball Mill and Rod Mill Xinhai

    Firstly, ball mill and rod mill have in common is that both are cylinder grinding mill When the cylinder is rotating, the cylinder rotates with the materials fed from the cylinder inlet and crushed by the falling impacts and autogenous grinding of the steel balls and ores in the cylinder Due to the continuously feeding materials, the pressure pushes materials to the outlet and the ground

  • The energy efficiency of ball milling in comminution

    01/11/2002· According to this definition, given that the energy utilization in a ball mill is between 1×10 −3 and 4×10 −3 m 2 /J, and that the crack resistance value is between 30 and 60 J/m 2, the theoretical efficiency of the ball mill should be in the range of 15–12%

  • Ball Mill an overview | ScienceDirect Topics

    The degree of filling the mill with balls also influences productivity of the mill and milling efficiency With excessive filling, the rising balls collide with falling ones Generally, filling the mill by balls must not exceed 30–35% of its volume Productivity of ball mills depends on drum diameter and the relation of drum diameter and length Optimum ratio between length L and diameter D

  • Rod/Ball Mill| Eriez Lab Equipment

    Ball/Rod mill Literature The Ball/Rod mills are meant for producing fine particle size reduction through attrition and compressive forces at the grain size level They are the most effective laboratory mills for batchwise, rapid grinding of mediumhard to very hard samples down to finest particle sizes A horizontal rotating cylinder (vessel) is partially filled with balls/rods (grinding

  • A population balance model of ball wear in grinding

    01/11/2018· Therefore, the stage of fragmentation decisively determines the efficiency of plant operation Austin et al, 1984, Austin and Concha, A Treatise on Internal Mechanics of Ball, Tube, and Rod Mills Constable and Company, London (1958) Google Scholar Sepúlveda, 2004 JE Sepúlveda Methodologies for the evaluation of grinding media consumption rates at full plant scale Min Eng, 17

  • Ball Mills Mineral Processing & Metallurgy

    Metallurgical ContentBall Mill Capacity VS Rod Mill CapacityWorking Principle & OperationRod Mill Capacity TableBall VS Rod Mill ConversionTypes of Mill DischargeBall Mill Trunnion and Mill Grate DischargePeripheral Grinding Mill DischargeLoad Capacity of Trunnion BearingsBall Mill & Rod Mill LinersGrinding Mill GearsGrinding Mill DrivesBall Mill Grinding CircuitBall Mill SpecificationsAll

  • Mills about | Article about mills about by The Free

    The efficiency of a mill is directly proportional to power consumption (for equal coarseness of the initial material and the product) Material with a particle size of up to 30 mm is handled by ball and rod mills; selfgrinding mills are suitable for particle sizes up to 300 mm The particle size of the product may be less than 004 mm The wear of the steel balls in grinding is 1–3 kg per

  • autogenous mill Spanish translation – Linguee

    Suggest as a translation of "autogenous mill" Copy; DeepL Translator Linguee EN Open menu Translator Translate texts with the world's best machine translation technology, developed by the creators of Linguee Linguee Look up words and phrases in comprehensive, reliable bilingual dictionaries and search through billions of online translations Blog Press Information Linguee Apps Linguee

  • autogenous mill Traducción al español – Linguee

    Autogenous mills, semiautogenous mills and ball mills for wet grinding (? 1581) polysius polysius Molinos autógenos, semiautógenos y molinos de bolas para la molienda por vía húmeda (? 1581) polysius polysius For diamond ore comminution, many diamond mines are using equipment supplied by Polysius Depending [] on the specific requirements, POLYCOM® high

  • 7 Major Differences between Ball Mill and Rod Mill

    The most frequently used ball mills are lattice ball mill and overflow ball mill (they are named from their different discharge structure) However, Rod mill doesn’t use grating to discharge ore and there are only two kind of Rod mill—overflow type and open type Moreover, the diameter of the hollow shaft of Rod mill is larger than that of ball mill of the same specification

  • Optimization of mill performance by using

    Figure 2 shows that there is no linear relation between mill absorbed power and ball filling degree As indicated on the graph, a small variation in power could be the result of a significant variation of balls filling degree As the ball wear rate depends directly on the surface of the media charge, a small variation in power will lead to an important increase of wear rate The risk of

  • TECHNICAL NOTES 8 GRINDING R P King

    These mills exist in a variety of types rod, ball, pebble autogenous and semiautogenous The grinding action is induced by relative motion between the particles of media the rods, balls or pebbles This motion can be characterized as collision with breakage induced primarily by impact or as rolling with breakage induced primarily by crushing and attrition In autogenous grinding machines

  • Bond EfficiencyGMGICEv1r04 Determining the

    dard Circuit, assume 244 m diameter overflow mills, and use a rod mill F80 of 16,000 µm and a rod mill P80 of 1,000 µm Note that—in order for no correction factor for ball mill product fineness to apply—the ball mill circuit P80 should be no less than approximately 70 µm (Bond, 1962) This

  • MODULE #5: FUNCTIONAL PERFOMANCE OF BALL MILLING

    efficiency In rod milling, you can use work index analysis to relate design and operating variables to overall circuit efficiency However, you cannot use work index analysis for the same purpose on ball mill circuits because of the complex interactions between grinding and classification In this module, you will learn how to relate design and operating variables to ball mill circuit

  • How to Choose a Ball Mill or a Rod Mill? by

    29/08/2019· There is a point contact between the steel balls of the ball mill, and the steel rods of the rod mill are in line contact, so the working characteristics of the two are significantly different 4

  • How to ensure energy efficiency in mining Mining

    Therefore, a really energyefficient circuit may mean three stages of grinding instead of only two, and each stage can be slightly smaller and more efficient than one big one, eg a SAG mill (or HRC) followed by a ball mill and with a tertiary Vertimill These options should at least be considered in the prefeasibility stage to see if the energy savings overcome the cost of an extra stage of

  • BALL & ACME LEAD SCREW TECHNICAL INFORMATION I

    the performance of ball screws is far superior The rolling action of the balls versus the sliding action of the ACME nut provides significant advantages Advantages of ball screw drives are increased efficiency (typically up to 90 – 95%) which allows required motor torque to be lower, predictable service life, low wear rate and maintenance

  • Ball mill Wikipedia

    A ball mill is a type of grinder used to grind or blend materials for use in mineral dressing processes, paints, pyrotechnics, ceramics, and selective laser sintering It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell A ball mill consists of a hollow cylindrical shell rotating about its axis The axis of the

  • Ball Mills | Industry Grinder for Mineral Processing

    Ball Mills 【Capacity】 From 0290 T/H 【Advantages】Designed for long service life, minimum maintenance, can grind and homogenize mineral ores down to the nano range, large volume of processing capacity 【Max Feeding size】 <25mm 【Discharge size】007504mm 【Types】overflow ball mills, grate discharge ball mills 【Service】 24hrs quotation, custom made parts, processing

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