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comparison statement with ball with rod mill

ball mills- mineral processing & metallurgy

Rod mills have usually a length/diameter ratio of at least 1.4. Tube Mills. Tube mills are in principle to be considered as ball mills, the basic difference being that the length/diameter ratio is greater (3—5). They are commonly used for surface cleaning or scrubbing action and fine grinding in open circuit

compareand understandrod/ball/impact-crushing/abrasion

Mar 17, 2017 · Relation of Bond rod mill work index and crushing work index. Similar to the ball mill work index, the rod mill work index is a tumbling test that includes both attrition and abrasion breakage mechanisms. Unlike the ball mill work index, the size of the feed to a rod mill test (10 mm–12 mm) is closer to the size of the crushing test

overflow vs grate discharge ballormill- why retrofit

Apr 24, 2018 · A general statement can be made that the closer the discharge is to the periphery of the shell, the quicker the material will pass through and less overgrinding will take place. This is important in both rod mill and ball mill grinding. First, regardless of how …

abrasion test| sgs

Wet rod mill: Rods: lb/kWh = 0.35(Ai – 0.020) 0.2: Liners: lb/kWh = 0.035(Ai – 0.015) 0.3 : Wet ball mill: Balls: lb/kWh = 0.35(Ai – 0.015) 0.33: Liners: lb/kWh = 0.026(Ai – 0.015) 0.3: Dry ball mill: Balls: lb/kWh = 0.05Ai 0.5: Liners: lb/kWh = 0.005Ai 0.5: Crushers (gyratory, jaw, cone) Liners: lb/kWh = (Ai + 0.22)/11: Roll crushers: Roll shell: lb/kWh = (0.1Ai) 0.667

grinding media - 911metallurgist

Ball size distribution is governed by the wear law of the mill and by the wear characteristics through the cross-section of the balls charged to the mill. With this in mind, it is interesting to make a qualitative comparison of the ball size distributions which should be generated by 76 mm pearlitic carbon steel balls versus 76 mm martensitic alloy steel balls in the 2.93 m mills. The 76 mm pearlitic carbon steel balls …

multiple choice questions on mechanical operations

Ball mill ; Tube mill ; Question 15 of 20. 15. Question 1 points. Crushing efficiency is the ratio of the. surface energy created by crushing to the energy absorbed by the solid. energy absorbed by the solid to that fed to the machine.

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 length. New feed entering at one end of the mill causes the rod charge to spread at that end. This produces a series of wedge shaped slots tapering toward the discharge end. The tumbling and rolling rods expend most of their crushing force on the

what are the differences between ball mill and rod mill

Ball mill and rod mill are the common grinding equipment applied in the grinding process. They are similar in appearance and both of them are horizontal cylindrical structures. Their cylinders are equipped with grinding medium, feeder, gears, and transmission device. Similar appearence and working principle of ball mill and rod mill

7 differences between ball mill and rod mill - xinhai

Although they have the similar working principle, there are many differences between ball mill and rod mill on details. 1. Configuration of ball mill and rod mill. The proportion of cylinder shape is different. The cylinder length-diameter ratio of rod mill is generally 1.5-2.0, while the cylinder length-diameter ratio of ball mill is smaller, only slightly greater than 1

in chart formatcomparethe operation (including d

In chart format compare the operation (including differences and similarities) of a Rod Mill and a Ball Mill. (Marks: 10 marks) Question is worth 10 marks so, please write minimum of …

ball mills- an overview | sciencedirect topics

The ball mill is a tumbling mill that uses steel balls as the grinding media. The length of the cylindrical shell is usually 1–1.5 times the shell diameter ( Figure 8.11 ). The feed can be dry, with less than 3% moisture to minimize ball coating, or slurry containing 20–40% water by weight

a comparative study on the effects of dry and wet grinding

Sep 01, 2019 · Chapman et al. (2013) compared the effects of using different circuits HPGR (dry) -rod mill (wet) and cone crusher (dry) -rod mill (wet) on the flotation of base metal sulfides. They indicated that apart from the grinding environment, HPGR could produce finer particles than a cone crusher. This difference was higher in the fully dry system

(pdf)selection and design of mill liners

The one of main problem in cement industry is the continouse abrasion in lining plates of cement mill as a result of impact, abrasive and erosion by steel balls grinding media inside cement mill