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Get Price Leave MessageApr 09 2015 ball mills ball mill fig 1 is same kind of mill as rod mill except that it is filled with balls instead of rods because of balls have greater ratio of surface area than rods they are more suitable for fine grinding balls are also lighter so the kinetic energy of a single dropping ball is smaller than a rod
Ball mills and rod mills are both excellent mining machines for grinding ores into fine powders and particles however there are some advantages to using rod mills rather than ball mills for larger mining projects including greater efficiency better grinding performance and lower energy costs
No 1 rod millball mill circuit was operating very ef 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 ner than
Comminution rod mill used to grind the product from a crushing circuit typical particle size of 3 cm and grinds it to a size fine enough for a ball mill to handle 05 cm grinding takes place preferentially on coarser particles produce less fines than ball mills media steel rods almost as long as the mill and can weigh 400 600 lbs
Rod mills are grinding machine which employ high carbon steel or special steel rods of nearly the same length as that of the drum in place of steel balls in ball mills rod mill products are generally coarser than those produced in a ball mill and rod mills are well suited to handle coarser feed and to control the top size of the product
Oleg d neikov in handbook of nonferrous metal powders 2009 tumbling ball mills tumbling ball mills or ball mills are most widely used in both wet and dry systems in batch and continuous operations and on a small and large scale grinding elements in ball mills travel at different velocities therefore collision force direction and kinetic energy between two or more elements vary
Ferent size mills were used to demon strate the usefulness of this form of the model in the scaleup design of ball mills 8 in the second phase of this iesear ch a grinding model was proposed to describe size reduction kinetics and material transport in rod mill grinding 9
Ball mills capacity from 0290 th advantagesdesigned 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 size007504mm typesoverflow ball mills grate discharge ball mills service 24hrs quotation custom made parts processing
Ball mill wio bwio 86 circuit wio owio 146 bond ball mill work index bwi kwht 134 bond rod mill work index rwi kwht 181 table 1 example of agsag ball mill circuit wio calculations 1 2 abstract optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have a large effect on
Rod millrod grinderrod grinding machinedry rod mill its a kind of effective and energy saving rod grinding machine the rod grinding mill has two types one is wet type rod mill and the other is dry rod mill
Rod mill a rotating drum causes friction and attrition between steel rods and ore particles citation needed but note that the term rod mill is also used as a synonym for a slitting mill which makes rods of iron or other metal rod mills are less common than ball mills for grinding minerals the rods used in the mill usually a high
Apr 11 2020 when rod mill users steel grinding rods are broken they could find out the reasons from the following aspects for reference only 1 the strength and hardness of steel grinding rod is not up to standard 2 corrosion of steel grinding rod caused by too high content of sulfur and phosphorus in rod mill 3 steel grinding rod wear too fine and rod pumping is not timely
Rod mill definition is a mill that produces rods of steel or other metal
Ball mill for sale ball mill is the key equipment for grinding materials those grinding mills are widely used in the mining process and it has a wide range of usage in grinding mineral or material into fine powder such as gold ironzinc ore copper etc jxsc mining produce reliable effective ball mill for long life and minimum maintenance incorporate many of the qualities which have made us being
Sep 09 2019 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 05mm the grinding effect of the ball mill is greater than the same specification of the rod mill
Rod mill produces fines than ball mill more less equal no relation no the answer is incorrect score 0 accepted answers less grinding should not be performed in state moist sticky dry slurry none no the answer is incorrect score 0 accepted answers moist sticky previous page end
The rod mill product is characterized by its narrow size distribution if it is compared with that of a ball mill operating under the same conditions in open circuit
to produce fines or filler from m ineral fractions by increasing the specific surface rod mills are less common than ball m ills for grinding minerals the rods used in the mill usually
For details the grinding theory of ball mill and rod are different in many ways 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
Ball mill westpros ball mills ensure fine grinding of minerals and ore our ball mills are engineered to provide the most efficient solution for fine finishing advantages liners are less expensive than rod mill steel liners ideal for fine grinding applications easy grinding media handling
In the ball mill and rod mill respectively and 087 for quartz ground in the ball mill and rod mill these slopes compare quite well experimentally with the values of ix from the size distribution of these materials as would be expected from equations 4 and 5 the log kx log plot for rod milling
Ef5bm p80103 1145 p80 3 the ef4 formula requires both the rod mill and ball mill work index rod mill wi is used to calculate the optimal feed size and because this is a singlestage ball mill calculation the f80 is actually the rod mill feed size 10000 m from table 1 and the p80 is the ball mill circuit product the ef5 factor only applies below 75 m to ball
The bond rod mill work index is not as common as the bond ball mill work index and there are two different variations on the mill apparatusthe sagmillingcom models expect a mill with a wave liner and is not compatible with mills using smooth liners
Forged mill ball heat treatment mill ball packing process assorted sizes forged mill balls heating bar for mill ball production on the grinding media our european mill ball and rod manufacturers produce forged and cast high quality grinding media that will meet and exceed client specifications
B bond work index both rod mill wr and ball mill wb the bond test is used to predict the energy required for coarse material grinding between the 80 passing feed size and the split size
The ball mill oversize feed factor ef 4 bm is always calculated with the rod mill work index for the optimum feed size and the ball mill work index for ef 4 bm the model assumes that the calculated value of e ssbm the specified contingency is greater than
The final stages of comminution are performed in tumbling mills using steel balls as the grinding medium and so designated ball mills since balls have a greater surface area per unit weight than rods they are better suited for fine finishing the term ball mill is restricted to those having a length to diameter ratio of l5 to 1 and less
Therefore we usually adopt the cement roller press to replace the fine crushing and coarse grinding role of the ball mill this increases the output of the ball mill system by 3050 and 2035 of the extruded materials are smaller than 008mm 6585 are smaller than 2mm
Ball mills and rod mills are both excellent mining machines for grinding ores into fine powders and particles however there are some advantages to using rod mills rather than ball mills for larger mining projects including greater efficiency better grinding performance and lower energy costs
The rod mill product is characterized by its narrow size distribution if it is compared with that of a ball mill operating under the same conditions in open circuit
Rod mill a rotating drum causes friction and attrition between steel rods and ore particles citation needed but note that the term rod mill is also used as a synonym for a slitting mill which makes rods of iron or other metal rod mills are less common than ball mills for grinding minerals the rods used in the mill usually a high
Comminution rod mill used to grind the product from a crushing circuit typical particle size of 3 cm and grinds it to a size fine enough for a ball mill to handle 05 cm grinding takes place preferentially on coarser particles produce less fines than ball mills media steel rods almost as long as the mill and can weigh 400 600 lbs
No 1 rod millball mill circuit was operating very ef 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 ner than
In the ball mill and rod mill respectively and 087 for quartz ground in the ball mill and rod mill these slopes compare quite well experimentally with the values of ix from the size distribution of these materials as would be expected from equations 4 and 5 the log kx log plot for rod milling
Aug 17 2018 rod mills can accept feed up to approximately 50 mm 2 in and produces the product size of 600 microns rod mills are more suitable for breaking up
Bauxite grinding practices and options john hadaway1 anthony filidore2 1 flsmidth minerals pty ltd 24 to 28 marshall road airport west victoria 3042 au
Forged mill ball heat treatment mill ball packing process assorted sizes forged mill balls heating bar for mill ball production on the grinding media our european mill ball and rod manufacturers produce forged and cast high quality grinding media that will meet and exceed client specifications
Rotary ball mill is composed of feeding part discharging part turning part transmission part reducer small transmission gear motor electric control and other main parts the hollow shaft of the rotary ball mill is made of cast steel and the lining can be removed and replaced the large rotary gear is processed by casting hobbing and the cylinder body is equipped with a wearresistant
Dec 30 2012 that being said here are a few links i found for building your own ball mill a rod mills would be build much the same but using heavy rods instead old truck axles would be a great source for a small rod mill with a ball mill or a rod mills having different sizes of grinding medium would work better than having all of the same size ballsrods
The rods grind the material by tumbling within the mill to prevent the conditions leading to rod charge tangling the length to diameter ratio is maintained at 14 to 16 rod mills accept feed up to about 50 mm 2 in and produce a product in the size range of 3000 to 270 mm 4 to 35 mesh compared with other types of rod mill for sale and
Here is a convertible laboratory ore grinding mill use it as a lab ball mill if you like overgrinding or a rod mill if you prefer selective milling sizes 8 x 8 to 8 x 16 ball and rod extra large batch 12 x 15 10 kilo ore load mild steel construction cantilever design integral lifters bayonettype lid closure rubber seal gaskets wash screen motorreducer and vbelt drive
Ball mills vs rod mills am king industries inc ball mills and rod mills are both excellent mining machines for grinding ores into fine powders and particles however there are some advantages to using rod contact us ball mill by saraswathib pharmainfo a ball mill is a type of grinder or mill used to mill the materials into fine powder
In fine grinding when the product size is 05mm the grinding effect of the ball mill is greater than that of the rod mill the feeding particle size of ball mill is generally 5
In the rod mill high carbon steel rods about 50 mm diameter and extending the whole length of the mill are used in place of balls this mill gives a very uniform fine product and power consumption is low although it is not suitable for very tough materials and the feed should not exceed about 25 mm in size
Rod mill is a type of grinding mill whose grinding media is steel bar while ball mill is steel ball 1 rod mill are usually applied to grinding the wsn ore and rare metal in the reselection or magneticoredressing plant in order to avoid the damage caused by the over crushing 2 in the two stage grinding process if it requires grinding the ore from 206mm to 13mm in the first stage rod
A rod mill uses steel rods as the grinding media in tumbling mills is an efficient means to feed ball mills a product finer than could be made in a crusher but coarser than could be made in a ball mill the principal use for rod mills which were invented to make ball mill feed in a wetgrinding rod millball mill
Ball mills are so termed in the trade when using balls as a grinding media in andthe difference of screen sizing as produced by mills grinding a stabilized mill load g 5 with enlarged collar on the rod midway between the rod and terminals mechanism and equipment to be inclined or tilted as a unit and with the mill
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
Agsag mills can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work of a ball mill because of the range of mill sizes available agsag milling can often be accomplished with fewer lines than in a conventional rod millball mill circuit a diagram of types of agsag
Apr 09 2015 ball mills ball mill fig 1 is same kind of mill as rod mill except that it is filled with balls instead of rods because of balls have greater ratio of surface area than rods they are more suitable for fine grinding balls are also lighter so the kinetic energy of a single dropping ball is smaller than a rod
Jul 10 2020 the rod mill discharge is pumped to the primary hydrocyclones that classify the particles by size the larger particles flow to feed the ball mills while the fine particles report to