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 “single-stage ball mill” calculation, the F80 is actually the rod mill feed size (10,000 m) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 m to ball
Get PriceMill sizing method. The mill sizing page: Please find below two calculators for sizing mills using the Bond and Rowland methods: Ball mill sizing: Calculator for ball mill (s) in a single stage circuit. Rod ball mill sizing: Calculator for rod mill (s) as first stage of the circuit and ball mill (s) as second stage of the. circuit
Get PriceApr 05, 2018 EF5 Fine Grinding in ball mills to product sizes finer than 80% passing 200 mesh (75 micrometers). EF6 High or low ratio of reduction rod milling. EF7 Low Ratio of reduction ball milling. EF8 Rod Milling. Example Rod Mill Design Calculations. Rod Mills. F = 18,000 micrometers. P = 1,200 micrometers. Wf = 13.2. Efficiency Factors: EF1 does not apply
Get PriceNumber, size and mass of each ball size depends on mill load and whether or not the media is being added as the initial charge. For the initial chargin of a mill, Coghill and DeVaney (1937) defined the ball size as a function of the top size of the feed, i.e., d †“V = 0.40 K ˆšF dB = ball size (cm) F = feed size (cm)
Get PriceFeb 13, 2017 Scoop Feeders for Ball-Rod Mills are made in various radius sizes. Standard scoops are made of cast iron and for the 3′ size a 13″ or 19″ feeder is supplied, for the 4′ size a 30″ or 36″, for the 5′ a 36″ or 42″, and for the 6′ a 42″ or 48″ feeder. Welded steel scoop feeders can, however, be supplied in any radius
Get PriceAG/SAG 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, AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill/ball mill circuit. A diagram of types of AG/SAG
Get PriceDec 12, 2016 If P is less than 80% passing 70 microns, power consumption will be. Ball Mill Power Calculation Example. A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work
Get Pricebling mills (AG/SAG, rod, and ball mills) involved in reducing the size of the primary crusher product to that of the final product (usually the cyclone overflow of the last stage of grinding prior to flotation/leach-ing). 2. Feed rate to the circuit (dry tonnes/h) 3. Power draw of the comminution equipment (kW)
Get PriceThe mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill AG/SAG mills can accomplish the same size reduction as two or three stages of crushing and screening, a
Get PriceNov 12, 2015 The method is valid both for clinker grinding and for raw materials grinding. This method only gives a rough and initial idea for sizing a cement ball mill. To go ahead, a deeper study is necessary with ball mills suppliers or a specialized engineering office
Get Price3.2 Rod Mill Design A different approach is taken with the rod mill design where equations by Bond and Rowling are used to calculate the mill power draw. The Morg rdshammar equation and the IMM equations are shown for comparison. The method of use is similar to the AM section 3.3 Ball Mill Design
Get PriceA method and a system are disclosed for maintaining optimum throughput in a grinding circuit of the type in which fresh ore is fed to a rod mill and the ground ore from the rod mill, together with the ground ore from a ball mill operated in a reversed circuit, are combined in a pump box and pumped to a cluster of hydrocyclone classifiers
Get Pricewill become the predictions. In the case of SAB/SABC circuits the transfer size is the product of the SAG mill circuit and the feed of the ball mill circuit. Hence if power-based equations such as eq. 1 and eq. 2 are to be used to predict the SAG mill circuit and ball mill circuit specific energies it is important to ascertain:
Get PriceRod and ball mills circuit sizing method. Rod mill as first stage and ball mill sizing with the Bond method for rod mill(s) + ball , 7, Power, kW, HP 8, Diameter calculation Mill % of the critical speed, %. live chat; Ball Mill Power Calculations. Aug 23, , A nice and pretty online Ball Mill Power-draw Calculator was put live by one of the
Get Pricecircuit includes two mills, i) rod mill using media (rods) with 8cm in diameter, and ii) Ball mill using 5cm balls in diameter. The product of rod mill (stream no.1) with about d 80 =600
Get PriceTable 1: Typical size ranges applicable to the Bond work index tests Feed Size, F80 Product Size, P80 Crushing work index, WiC 100 mm 10 mm Rod mill work index, Wi RM 10 mm 1500 m Ball mill work index, WiBM 1500 m 100 m Determining Overall Circuit Specific Energy Consumption To predict the cumulative breakage from a coarse size to a fine
Get PriceThis method employs a 45-cm (18-in. ) dry grinding Aerofall mill to grind small quantities of core or crushed samples in the top size range of 2 to 5 cm (1 to 2 in. )
Get PriceRod/Ball Mill| Eriez Lab Equipment. /Rod Literature The /Rod are meant for producing fine particle size reduction through attrition and compressive forces at the grain size level. They are the most effective laboratory for batch-wise, rapid grinding of medium-hard to …. Leave Us Now
Get PriceBond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bond’s 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
Get PriceCalculations the reduction ratios of rod and ball mills were 6465 and 115 which show high discrepancies from design values 23 and 75 for rod and ball mills ... Crusher Size Reduction Ratio Calculation Method. ... ratio ball mill calculation of reduction ratio ball mill there is a rapid and easy way to calculate it from any set of circuit size
Get PriceA series of pilot plant tests were run to compare roller press products to rod mill products in a simulated taconite flowsheet using magnet separation and closed circuit ball milling. Further investigation of a hybrid grinding system, roller press crushing followed by ball mill grinding, indicate that the combination may represent more the
Get PriceBed porosity typically 40. Height of bed measured in the same way as ball mills. Bulk density of rods 6.25 tonsm3. In wet grinding the solids concentration 1s typically 60 75 by mass. A rod in situ and a cutaway of a rod mill interior. Rod Mill Critical Speed. Rod mill as first stage and ball mill sizing with the Bond method. for rod mills ball
Get PriceSep 22, 2020 The processing capacity of ball mills and rod mills is usually calculated by volumetric method or power consumption method, and the selection of ore mill should meet the following requirements: 1) Rod mills are mostly used for rough grinding, with a discharge particle size of 1~3mm, which can be ground to 0.5mm in a gravity separation plant
Get PriceJean-Paul Duroudier, in Size Reduction of Divided Solids, 2016. 3.7.4 Performance. Rod mills are used in an open circuit between crushing and the ball mill. They often operate in wet and where the pulp contains up to 50% solid by mass. This machine is equally very applicable to dry where it could take a feed that has achieved 6% moisture
Get Pricemills, and use a rod mill feed size (F80) of 16,000 m and a rod mill product size of 1,000 m . Also note that in order for no correction factor for ball mill product fineness to apply, the ball mill circuit P80 should be no less than approximately 70 m (See reference by Bond, 1962)
Get PriceA Method Of C Alculating Autogenous Semi. The run of mine (RoM) ore from the mining site will be transported by rail to the crushing circuit and will then be transferred to a rod mill in open circuit and a ball mill in closed circuit The ball mill slurry will be sent to a flotation circuit equipped with rougher cleaner and final column facility for concentration.Jan 01 2016 open
Get PriceNov 15, 2012 Ball Mill Single And Double-Stage Circuits – Gold Ore Crusher. A rod mill in an open circuit may be … The hydrocyclones then feed the ball mills by gravity. A set of ball mill discharge … gold metal detector circuit diagram; More detailed
Get PriceNov 11, , SUBJECT: SAG MILL + BALL MILL CIRCUIT SIZING , The EF4 formula requires both the rod mill and ball mill work index (rod mill Wi is used. More Price Design Method of Ball Mill by Discrete Element
Get PriceA method and a system are disclosed for maintaining optimum throughput in a grinding circuit of the type in which fresh ore is fed to a rod mill and the ground ore from the rod mill, together with the ground ore from a ball mill operated in a reversed circuit, are combined in a pump box and pumped to a cluster of hydrocyclone classifiers
Get PriceRod Mills - yoursolution for grinding coarse materials. Available in multiple sizes.Designs extend to 15 feet x 22 feet (21 feet effective). Though mill length is limited by manufacturing constraints for the grinding rods, our Rod Mills are available in diameters from 5 feet up to 15 feet
Get PriceNov 08, 2012 Manual Crushing and Grinding Methods:Gold Stamp mill and Rod mills …. Ball mills & rod mills. …Small-Scale Gold Miners Use Crushing Equipments; Grinding Circuit; Malaysia rock crusher; ball mills with specifications and dimensions; More detailed
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