ball mill and rod mill designing
Tubular Rod Mills
The design characteristics of industrial rod mills are similar to ball mills. Most rod mills used in mineral processing are of the overflow discharge type as illustrated in …
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Rod Mill
Tubular Rod Mills. In Mineral Processing Design and Operations (Second Edition), 2016. 8.3.1 Rod Mill Charge. Rod mill charges usually occupy about 45% of the internal volume of the mill. A closely packed charge of single sized rods will have a porosity of 9.3%. With a mixed charge of small and large diameter rods, the porosity of a static load could be …
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Rod Mill Design Calculations
EF5 Fine Grinding in ball mills to product sizes finer than 80% passing 200 mesh (75 micrometers). EF6 High or low ratio of reduction rod milling. EF7 Low Ratio of …
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Ball Mill Design/Power Calculation
The bottom parameters used in ball milling design (power calculations), rod mill or any tumbling mill page is; material to be ground, property, Bond Employment Card, bulk density, specific density, wish mill tonnage capacity DTPH, operates % stables or pulp density, feed extent as F80 and maximum 'chunk size', product size as P80 and …
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Grinding & Classification Circuits
Hello everyone. I am working on a new mining project in Bolivia. The listed mills are: 9x13 Feet Ball Mill with 500 HP motor 10.5x14ft Rod Mill with 700 HP motorThe design of the foundation for dynamic equipment consists of two parts, t...
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MODULE #5: FUNCTIONAL PERFOMANCE OF BALL …
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 efficiency through functional performance analysis*. This Introduction is seven pages long.
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Ball Mill
Cylindrical Ball Mills differ usually in steel drum design (Fig. 2.11), which is lined inside by armor slabs that have dissimilar sizes and form a rough inside surface. Due to such juts, the impact force of falling balls is strengthened. ... Ball and Rod Mills. Jean-Paul Duroudier, in Size Reduction of Divided Solids, 2016. 3.1.2 Operation ...
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Grinding Mills
Grinding Mills: Ball Mill & Rod Mill Design & Parts Common types of grinding mills include Ball Mills and Rod Mills. This includes all rotating mills with heavy grinding media loads. This article focuses on ball and rod mills excluding SAG and AG mills. Although their concepts are very similar, they are not discussed here. Photographs of a glass …
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Design, Construction and Performance Analysis of a 5 …
Since for the ball mill design we are using 80% passing, the required value of C2 for the ball mill will be equal to1.20. C3 is the correction factor for mill diameter and is given as; 𝐶𝐶3 = 2.44 𝐷𝐷 0.2 (3) However, it is important to note that C3 =0.914 vessel used in producing the ball mill was got from a
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SAG Mill Testing
mill. As such, primary ball mills should be designed with the rod mill work index, and single-stage ball mills should be with both the rod mill and ball mill indices. This is because it is common to observe a difference (sometimes significant) between the rod mill and ball mill index values for a given ore type (McKen, Verret, & Williams, 2006). On
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AMIT 135: Lesson 8 Rod Mills – Mining Mill …
Introduction Rod Mill Used as the primary comminution unit in a grinding circuit. Rods are placed parallel along the length of the rod mill. Rods are 150mm shorter than the mill length. Breakage occurs more from …
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Comparative Analysis of Rod Mill and Ball Mill
Rod mill VS ball mill-shape and internal structure. The shape design of the rod mill and the ball mill are similar, and both adopt horizontal rotatable cylinders. The internal structure of the two is basically the same. There are grinding media in the barrel, as well as feeder, gears, feed end, discharge end, transmission device, etc. ...
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Comminution Theory & Process Equipment
Two main categories of grinding equipment, namely rod mills and ball mills, have also been mentioned. Whether grinding is to be performed wet or dry, or in a ball mill or rod mill, a choice must be made between open or closed circuit. ... Mills are essentially cylindrical in shape and this design has been selected for very definite reasons.
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Grinding Mills – Harcliff
GRINDING MILLS – BALL Mills, SAG Mills, AG Mills & ROD Mills. We refurbish, design and manufacture an extensive range of high-quality mills and mill components to exacting standards, offering you a turnkey service that's backed by two decades of engineering expertise. BROCHURE. Finite Element Analysis (FEA) Ball Charge Trajectory Modelling ...
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Ball Mill Design/Power Calculation
The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, …
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Ball Mill Design/Power Calculation
The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific ...
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Grinding Mill Liners- An Overview
The design of a mill liner is driven by application, materials of construction, casting technology and handling issues. ... These are 550 BN hardness and were used in rod mills and ball mills ...
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Determination of work index in a common …
[Show full abstract] different characteristics of rod mill and ball mill, solving the grinding problem of difficult attrition bauxite. Compared with the traditional one-stage grinding, the power ...
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The Selection Design and Application of Mill Liners for …
(picture is a "hump" design commonly used in ball mills) > Correct wave angle needs to be specified ... > 600 – 700 BHN Cr iron- rod mills and ball mills > Excellent abrasion resistance. Provide the best combination of toughness and …
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Ball Mill Parameter Selection & Calculation
1 Calculation of ball mill capacity. The production capacity of the ball mill is determined by the amount of material required to be ground, and it must have a certain margin when designing and selecting. There are many factors affecting the production capacity of the ball mill, in addition to the nature of the material (grain size, hardness, …
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Using the Bond work index to measure operating comminution …
Austin, L.G., Klimpel, R.R., and Luckie, P.T., 1984, Process Engineering of Size Reduction — Ball Milling, SME, Chapter 4, p.76. Google Scholar . Bond, F.C., 1952 ...
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(PDF) Selective comminution and grinding mechanisms of
At 5 min grinding time, the maximum selective comminution factor (β) values of ball milling and rod milling were 2.00 and 1.63, respectively, indicating a higher degree of selective comminution ...
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The essential grind
The Bond Ball Mill Work Index remains today as the only tool used for ball mill scale-up design. For an (only nominally, not at all materially modified) update on its use for industrial mill sizing, see " Selection of Rod Mills, Ball Mills, Pebble Mills, and Regrind Mills," Rowland, C. A., Jr., 1982, Chapter 23, Design and Installation of ...
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Grinding Mill Design & Ball Mill Manufacturer
If N is taken to be the gross mill power, values of the factor c in wet grinding mills will be. rod mills 1/1800 ball mills, grate discharge 1/1200 ball mills, overflow type 1/1470 pebble mills 1/1200. W for rod and ball mills shall be taken as the weight of the rod or ball charge, i.e. the weight of the pulp is to be ignored.
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Ball Mills
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How to design a Ball Mill
WebYou also need a rod mill work index to design a ball mill operating on a coarse feed, above about 4 mm. Q1: You design for a typical percentage of critical speed, usually …
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Ball Mills vs Rod Mills
Ball Mills vs Rod Mills When the mill is rotated without feed or with very fine feed, the rods are in parallel alignment and in contact with one another for their full …
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Grinding Mills Ball Mill Rod Mill Design Parts | PDF
The gradient is steeper than in an Overflow type mill. A Diaphragm ball mill has a higher capacity and requires more power than an Overflow ball mill of equal ball charge. The Overflow rod mill is applied to wet grinding. The Center Peripheral Discharge rod mill is also used for wet grinding but produces a coarser product than the overflow type.
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Autogenous Grinding & Semi Autogenous Grinding …
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 ...
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Rod Mills
These mills may be divided into three types ROD MILLS, BALL MILLS and AUTOGENOUS MILLS. In the first type, the ROD MILL, the ore is introduced into the mill. ... There are many different patterns and types of liners depending upon the job that they are doing and the design of the mill. Later for interest sake we will explain the difference in ...
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Comparison of Ore Hardness Measurements for …
standard Bond crushing, and rod mill work indices, abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed, and Standard Autogenous Grinding Design (SAGDesign) Tests, patented by Outokumpu. (See reference 8 below). The comparison of these results gives context to how the various measurements relate to …
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