9 mm is fed to the rod mill and the water is fed in ratio to the ore feed mass the rod mill discharge is pumped without any further water addition to the first ball mill the ball mill discharges to a sump where water is added before the slurry is pumped to the first cyclone cylcone 1 see figure 1 for a schematic of the process flow.
A rod mill feed conveyor 4 accepts all of the ore from these feeder belts for ultimate transfer to the rod mill this conveyor is normally equipped with a weightometer 5 to monitor the flow rate of ore to the rod mill and ultimately to allow control of this
Apr 09 2015 the rod mill fig 1 is a tumbling mill which is having a large percentage of its volume 30 to 40 loaded with steel rods the rods are placed axially in the mill and are loose and free to move within the mill the internal lining of the drum has a series of lifters which raise the rods and drop them at a predetermined
Ball mill rod mill material flow 2009730material in the mill including the media which may be steel balls in a ball mill or large lumps of ore in an autogenous mill or a mixture in a semiautogenous mill as well as the slurry that makes up the operating chargeet jt be the fraction of the mill volume that is occupied by the total charge jb the fraction of
Flowsheet use rod mill for grinding processing ability 0 5–500 th feeding size ≤25 mm ball mill is the key equipment for grinding after the crushing process which is widely used in the manufacture industries such as cement silicate new building material refractory material fertilizer ferrous metal nonferrous metal and glass ceramics and can be used for the dry and wet grinding for all
Horizontal bead mill is continuouslyprocessing grinding and dispersing machine with a horizontal chamberit is the most widely used most advanced and most efficient ultrafine grinding machinethe horizontal bead mill can be divided into disc type bead mill rod pin type bead mill and turbine type bead mill based on the shape of the working part for the grinding
Jan 27 2020 these two types of mills are filled with varying compositions of grinding media sag mills contain balls of up to 150mm in diameter that occupy 518 of mill chamber volume ball mills conversely contain grinding media up to 50mm in diameter occupying between 25 40 of mill chamber
Jul 18 2008 if the mill is static then there can be no flow of product in a working mill there is dynamic movement what comes in must go out product and metal is carried up the side of the mill sometimes assisted by lifter strips which creates a head causing flow it is not essential for the mill to be inclined to create flow regards
Jul 18 2008 in a ball mill material is fed and the product discharged in a continuos flow in the course of size reduction the material moves from intet to the outlet of the millthis motion is due to several factors in dry grinding these are 1 increase in bulk volume of material as it
Milling circuit consists of a rod mill followed by a ball mill in series crusher product 9 mm is fed to the rod mill and the water is fed in ratio to the ore feed mass the rod mill discharge is pumped without any further water addition to the first ball mill the ball mill discharges to a sump where water
Qualified materials flow from the cylinder outlet in wet grinding the materials are taken out by the water flow ball mill and rod mill are usually driven by an asynchronous motor or synchronous motor the rotating speed of the cylinder is below the critical speed in order to obtain a better impact effect some ball mill speed can be
Rod mill as the name suggests is to rely on rod bars for the material grindingand wet overflow is a generally used material wayrod mill is generally used as a grinding equipment in the artificial stone sand concentrator chemical plants and power sectors the ball mill has a great similarity in appearance with rod millwhich is most
Rod mills are very similar to ball mills except they use long rods for grinding media the rods grind the ore by tumbling within the the mill similar to the grinding balls in a ball mill to prevent the conditions leading to rod charge tangling the length to diameter ratio is maintained at 14 to
Several factors influence the efficiency of ball mill grinding the density of the wet feed should be as high as possible consistent with the ease of flow through the mill it is essential that the balls are covered with a layer of material grinding efficiency also depends on the surface area of the
The jars should be charged with at least 20 pounds of balls or rods for the rod milland 25to 40 by volume material to be ground 14 liters to 2 liters the batch ball and rod mill consists of the grinding cylinder with four lifter bars machined rolling rings threaded removable yoke hand lever for tightening and loosening the lid a
This is partly due to the bridging action of the rods over the coarse particles avoiding the fine sizes the grinding kinetics aspect and partly due to the nature of material flow through