a Mill Geometry and Speed – Bond 1954 observed grinding efficiency to be a function of ball mill diameter and established empirical relationships for recommended media size and mill speed that take this factor into account As well mills with different length to diameter ratios for a given power rating will yield different material retention times the longer units being utilized for high reduction ratios and the
As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.
Feeding Size: ≤25mm
Production Capacity: 200t/d-8,000t/d
Technological Features: Crushing raw materials, pre-homogenizing materials, arranging ingredients, efficient grinding, homogenizing materials, suspending pre-heater and decomposing furnace, new type cooler, cement dosing and grinding.
Feeding Size: ≤25-≤30mm
Discharging Size: 0.125- 0.044mm
Production Capacity: 2-176TPH
Lift Height: 28-32.7m
Throughput: 3-60m³/h
Applied Material: Coal, cement, stone, sand, clay and ore
Equipped with vibrator feeder, jaw crusher, sand maker (vertical shaft impact crusher), vibrating screen, sand washer, belt conveyor and central electronic control, sand making plant can process the granite, limestone, basalt, cobble and other materials t
View DetailsThe limonite is a kind of common iron mineral. Limonite shows various structures, such as massive, earthy, milky or grape-like structure. Limonite is mainly used in chemical industry, building materials, refractory materials, metallurgy and other industri
View DetailsThe 700t/d Gold Concentration Plant in Sudan is designed by Henan Fote Heavy Machinery Co., Ltd. Fote Machinery has provided the whole service including ore beneficiation test, plant design and construction drawing design, complete equipment manufacture a
View DetailsMain Equipments: PE1200×1500 jaw crusher, cone crusher, vibrating scree, vibrating feeder and conveyor.
View DetailsWork indices calculated from operating data when compared to work indices obtained from Bond Grindability tests for the same mill feed give a direct measure of grinding efficiency The Bond Equation and the equations for the associated efficiency factors can be used by plant supervisory and technical personnel and can also be used in computer programs for reporting andor process control
View DetailsThe power per tonne for rod milling is determined from the rod mill feed rate and the power per tonne for ball milling is determined from the ball mill feed rate Note the efficiency factor of 122 lines up with the 12 factor recommended for selecting rod mills for rod milling circuit when feed is
View Details• Bond Test WI’s kWht Crushing160 Rod Mill 145 Ball Mill 138 • Bond Standard Circuit Work Index W1 160 x 10 SQRT 16000 – 10 SQRT 165000 09 kWht
View DetailsFirst stage will be broken into two parts as well you use a Bond rod mill work index for the coarse component of the ore 21 mm and the Bond ball mill work index for the fine component 21 mm It would look like this Eprim 10Wi rm 210005 F 8005 10Wi bm T 8005 210005EF2EF4 Esec 10Wi bm P 8005 T 8005EF4EF5
View DetailsThe developers used a mix of British and metric units and either or both are used here where convenient Apparatus The Bond ball mill is made of metal 12 inches 305 cm inside diameter and 12 inches 305 cm inside length with rounded corners It is smooth except for the door hole used for charging
View DetailsFirst stage will be broken into two parts as well you use a Bond rod mill work index for the coarse component of the ore 21 mm and the Bond ball mill work index for the fine component 21 mm It would look like this Eprim 10Wi rm 210005 F 8005 10Wi bm T 8005 210005EF2EF4 Esec 10Wi bm P 8005 T
View Detailsµm Note thatin order for no correction factor for ball mill product fineness to applythe ball mill circuit P80 should be no less than approximately 70 µm Bond 1962 This Bond Efficiency determination should not be applied to circuits with a P80 finer
View DetailsBond Efficiency Determinations Revised March 26 2015 B1 The Bond Rod Mill WI Test Equipment and Procedure Revised March 26 2015 C1 The Bond Ball Mill WI Test Equipment and Procedure Revised March 26 2015 Introduction and Background Please see the references and slide presentation“Bond Efficiency SLC rev3”
View DetailsOct 19 2017 · Bond formula for the grinding balls size calculation October 19 2017 · Archive · 0 The enterprises consumers grinding media have a question about right choise the grinding ball size diameter for the mill in order to achieve the required grinding quality
View Details2010109predictions for ball mills typically use the following form of the Bond is the total surface area Read More Bond Efficiency and Tips Leadership Digital
View DetailsMar 08 2013 · calculation of ball mill grinding efficiency dear experts please tell me how to calculate the grinding efficiency of a closed ckt open ckt ball mill in literatures it is written that the grinding efficiency of ball mill is very less less than 10 please expalin in a n excel sheet to calcualte the same thanks sidhant reply
View DetailsThe 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 openclosed
View DetailsSee this useful summary Table of Bond Work Index by Minerals For any circuit whether a crushing circuit a rod mill or a closed ball mill circuit the Work Index always means the equivalent amount of energy to reduce one ton of the ore from a very large size to 100 um The sample was received crushed appropriately for the ball mill test
View Detailsmicrometers in size According to the Bond standard procedure the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250 circulating load Bond 1949 1952 1961 The test is performed on a raw material approximately weighing 10 kg which coarseness is 100 3327 mm
View DetailsThe ball mill is the most common ore grinding technology today and probably more than 50 of the total world energy consumption for ore grinding is consumed in ball mills
View DetailsDec 26 2017 · Mill Geometry And Speed According to Bond 1954 the grinding efficiency of a mill depends on the ball mill diameter size of the media and mill speed Ball mills with different length to diameter ratios for a particular power rating will produce different material retention times
View DetailsEffect of ball and feed particle size distribution on the milling efficiency of a ball mill An attainable region approach It was also observed from the experimental results that in order to increase the milling efficiency of a ball mill towards optimum production of material in the desired size class there is a need to correlate the ball
View DetailsOver the years it has been determined that Efficiency Factors EF1 to EF9 should be applied to Equation 1 to drive the corrected power requirement Rowland 1982 The equation for Third Theory of Comminution Bond’s was originally developed for use with conventional crushing and grinding circuits crusherrodball mill or crusherball mill
View Detailsto determine the size of mill required based on throughput and therefore motor power The standard Bond Ball Mill Work Index test procedure is firstly to stage crush the feed to minus 335mm and size a representative sample The test then involves a series of batch grinds in a standard Bond mill A Bond mill is 0305m by
View Details