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 density desired mill tonnage capacity DTPH operating % solids or pulp density feed size as F80 and maximum chunk size product size as P80 and maximum and finally the type of circuit open closed you are designing for.

Live ChatThe following cost advantages should be considered when evaluating rod mill grinding: Rod Mills use low cost grinding media. Less power is required since grinding rods are not cascaded and operate at lower peripheral speeds.

Live ChatA 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 circuit. Rod mills came into use in the United States beginning in 1900s and

Live Chatconventional crushing and grinding circuits (crusherrodball mill or crusherball mill). By the 1970s the By the 1970s the application of conventional tended to be limited to relatively low capacities.

Live Chatto determine the size of mill required based on throughput and therefore motor power. The standard Bond Rod Mill Work Index test procedure is firstly to stage crush the feed to pass 12.7 mm and size a representative sample. The test then involves a series of batch grinds in a standard Bond rod mill. A Bond rod mill is 0.305m

Live ChatRod 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.

Live ChatThe Bond Rod Mill Work Index is a measure of the resistance of the material to grinding in a rod mill. It can be used to determine the grinding power required for a given throughput of material under rod mill grinding conditions. It is a 'locked cycle' test conducted in closed circuit with a laboratory screen.

Live ChatThe power predictions for ball mills typically use the following form of the Bond equation: = [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 highcarbon steel can vary in both the length and the

Live ChatThe speed of rotation of the mill influences the power draft through two effects: the value of N and the shift in the center of gravity with speed. The center of gravity first starts to shift to the left as the speed of rotation increases but

Live ChatBond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bonds Third Theory of Comminution to calculate net power requirements when sizing ball mills*. Various correction factors may have to be applied. The test is a closedcircuit dry grindability test performed in a standard rod mill. It can be performed at mesh sizes ranging from 4 mesh to 65 mesh. The normal

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