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If the raw materials are tungsten and tin ore, rod mill is a better choice, while if the raw materials are aluminum ash, lime, slag, molybdenum ore, ball mill has stronger processing capacity. 2. Selecting the ball mill and rod mill according to the granularity and effect of the finished product.
Rod milling in the size range utilized is more efficient than ball milling in that the desired product is obtained at a lower cost per ton. This is due to several
Dec 30, 2012#0183;#32;Rod milling within the size range utilized is more efficient than ball milling because the specified method is obtained better value per ton. #187; More detailed Rod Mills over Ball Mills ? |
They have lower specific energy consumption than ball mills and the separator, as in raw mills, is integral with the mill body. In the Loesche mill, Fig. , 16 two pairs of rollers are used. In each pair the first, smaller diameter, roller stabilises the bed prior
The cylinder shape proportions of two devices are different. Generally, the ratio of tube length to diameter of Rod mill is : In addition, the inner surface of the lining plate on the end cover of Rod mill is vertical. However, the ratio of tube length to diameter of ball mill is small, and in most cases, the ratio is only slightly more than 1. Moreover, the cylinder working speed of Rod mill is lower than that of ball
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
Ball mill is the key equipment when the crushed materials need to be ground. Ball mill is one of high fine grinding machines that are widely used in industrial production. Rod mill is line contact, ball mill is point contact. Rod mills uses very little space which is quite convenient compares to ball mills which require more space so that...
The ball mill has a wide range of applications among so many mining machines and it is regarded as the highest working efficiency grinding equipment.. Today our experts will tell you the secret of the most efficient grinding machine, namely the importance of the ore grinding medium which will make difference to the ore beneficiation plants.
For ball mill, the grinding force of steel ball to ore is less than the impact, because the contact area is small between balls and mineral. Thus, the throwing motion of ball can produce a large impact, but it need a high rotate speed and has a higher power consumption. But for rod mill, grinding effect is better which need a lower rotate speed and has a lower power consumption.
The practical limit to ball mill product fineness is considered To determine mill power draw characteristics and capabilities for rod, ball and design vportable stone crushing machinesariables and operating conditions related to ball mill grinding efficiency. Synopsis. Ball mills are usually the largest consumers of energy within a .
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. Rod mills usually require greater operator attention. It is important
Nov 22, 2020#0183;#32;An ore charge is added to the drum, and as it rotates, friction between the tumbling rods breaks the ore down into finer particles. Although similar in operation, a rod mill is often more effective than a ball mill as it requires lower rotational speeds and less steel to achieve the same results.
Recommendation of 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.
Both drive rolls have variable speed drives, for operating the mill at the desired revolutions. Either wet grinding or dry grinding may be conducted in the batch ball and rod mills. Usually, wet grinding is more efficient than dry grinding, however in laboratory operations, adding liquid is not feasible.
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. Read more
Nov 09, 2020#0183;#32;It is a result of the lower process energyconsumption in HPGR and lower energyconsumption of the downstream grinding processes, as compared to conventional crushing devices. The
If a ball mill uses little or no water during grinding, it is a dry mill. If a ball mill uses water during grinding, it is a wet mill. A typical ball mill will have a drum length that is 1 or times the drum diameter. Ball mills with a drum length to diameter ratio greater than are referred to as tube mills.
Sep 09, 2019#0183;#32;In the rough grinding, the product particle size of 13mm, the processing capacity of the rod mill is greater than the same specificationof ball mill, when used for fine grinding, the product granularity is less than, the grinding effect of the ball mill is greater than the same specification of the rod mill. That is, the product of the ball mill is more refined, the rod mills product is rougher, but
The rod mill usually uses 50100mm diameter steel rod as grinding medium, while the ball mill uses steel ball as grinding medium. The length of steel rod is 2550mm shorter than the cylinder, and it is usually made of high carbon steel with carbon content of % 1%; the loading capacity of rod is about 35% 45% of the effective volume of rod mill.
Jun 11, 2019#0183;#32;dalmatiangirl61: In the order you have listed; a ball mill can fine grind down to lt;400 mesh if needed, a rod mill will efficiently grind to 150/200 mesh range, and a roll mill can do a +/ 100 mesh. The ball and rod mills are similar in appearence, as a large rotating lined cylindrical tube filled with either metal balls or long rods used as the grinding medium.
Rod mills are less common than ball mills for grinding minerals. The rods used in the mill, usually a... Read more. The Difference Between the Ball Mill and Rod Mill Essay wang. Rotary grinding mill shortrod and ball type Ball mills are so termed in the trade when using balls as a grinding media in the mill load; rod mills when
In addition, the processing capacity of the rod mill is larger than that of the ball mill of the same specification. The overflow, end peripheral discharge and center peripheral discharge are the three main types of rod mill, while only the wet overflow type rod mill is usually used as the pregrinding equipment in the cement plant. In order to
As such, when the product is sticky, rod mills are preferred over ball mills. Rod mills have an industrial yield that is less than that of a ball mill, which explains the fact that balls have a much larger grinding surface than rods. The power needed to operate a rod mill could exceed 30% of the power used in a
Nov 19, 2019#0183;#32;On the other hand, the surface area of the steel rod medium in the rod mill is smaller than that of the steel ball medium in the ball mill, so the utilization factor is lower than that of the ball mill of the same processing capacity. Rod mills are often used in coarse grinding operations and are not suitable for fine crushing. Buti in some cases, the rod mill can replace the fine crusher and solve the
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