The following four grid-type ball mill models are recommended to meet the daily production demand of 1500 tons: MQGg2740: Diameter: 2.7m. Length: 4m. Motor Power: 380kW. Processing Capacity: 12.5 ...

corresponds to a particular ball-mill size. 4 DENVER SLIDE RULE (Photo) Determination of the ball-mill dimensions (D x L) with the help of the Denver slide rule (e.g. for this particular case 9'x10'≈2.74 m x ... (short ton/h), zthe ball-mill dimensions (D and L), when not only D f,

The object of these tests was to determine the crushing efficiency of the ball-mill when crushing in closed circuit with a classifier. The conditions were as follows: Feed rate, variable from 4 to 15 T. per hr. Ball-mill power, 108 kw. Ball load, 28,000 lb. of 3- and 2-in. balls. Feed, minus ¼-in. material. Speed, 23.8 r.p.m.

The ball consumption for mills delivering a coarse product, all passing 8-mesh and containing 10 to 20 per cent, below 200-mesh, the mill being run in open circuit, is about ½ lb. per ton for steel balls and 1 lb. for cast composition balls.

High temperature of the ball mill will affact the efficiency. 3 For every 1% increase in moisture, the output of the ball mill will be reduced by 8% -10%. 4 when the moisture is greater than 5%, the ball mill will be unable to perform the grinding operation. 5. The bearing of the ball mill is overheated and the motor is overloaded.

In the standard A-C closed circuit ball mill grindability test the work index is found from. where Pi is the opening in microns of the sieve mesh tested, and Gbp is the net grams of mesh undersize produced per revolution of the 12″ x 12″ test ball mill. The closed circuit 80% passing size P averages P1/log 20 for all sizes larger than 150 mesh.

Numerically the Work Index is the kWh per ton required to reduce the material from theoretically infinite size to 80% passing 100 µm." ... It can be seen that while the ball mill feed and discharge size distributions are quite similar in shape, the shapes of the rod mill discharge and cyclone overflow streams are very different. ...

Sizing a Ball or Rod Mill Sizing a Crusher using >1200 Wi of Ores from Database For your convenience, this manual lists over 1200 work indexes. Table I lists the Work Indexes alphabetically by company and …

of definite shape and size, typically a few mm in length. The principal types of size reduction machines are: 1- Crushers: a- Jaw crusher b- Impact crushers c- Gyratory crushers d- Crushing rolls 2-Grinders: a- Hammer mills and other impact types b- Ball mills, Tube mills and Rod mills. c- Roller mills and bowl mills d- Attrition mills

The work Index for limestone may be taken as 12.74 kWh/short ton. 5 Points (b) If a ball mill requires 3 kWh per ton of feed to reduce a feed of 1600 micron size to a product of 400 microns size, calculate the work index. 5 Points .

Ball Mills. Ball mills have been the primary piece of machinery in traditional hard rock grinding circuits for 100+ years. They are proven workhorses, with discharge mesh sizes from ~40M to <200M. ... The capacity, or throughput, of a ball mill is directly linked to particle size of the ball mill discharge. For example, it takes approximately 3 ...

LBM-6771-120. LBM-82103-280. Diameter (Stl, in) (90% Alumina) (in) LBM4848-39. LBM4860-49. Orbis Machinery provides steel Ball Mills and Lined Ball Mill machinery. Learn more about our ball milling equipment …

Standard features include: Thick, manganese steel bolt-in liner sections for easy replacement, when needed. Oversized trunnion bearings for long life. 2", 3" and 4" …

Size reduction from 22.4 to 3.2 mm for hardwood specific energy requirement for knife mill is two times lower than for hammer mill, and vice versa for corn stover. It is also worth noting the typical situation where the authors use term "ball mill" for another type of equipment that uses balls as grinding bodies.

product size distribution from the closed circuit ball mill test with a 150 micron screen at two different circulating loads and classification efficiencies. The product from the test with 250% ...

View 4. Size reduction problems Questions _2020 batch.docx from ME MISC at Manipal Institute of Technology. Problems based on Size reduction 1. ... A ball mill of 1.2 m diameter is being run at N = 50 rpm. ... Rittinger's law E = 13.54 Watts – hr/metric ton; Kicks law E = 26.94 kW-hr/metric ton) Answer. p"=26.87meter/tonwa. 18.

If a corresponding 5% increase in feed rate is not also achieved, then the wear rate (lbs./ton) will be increased. The same analysis can be made for ball size. Secondary Grinding – Ball Mills. In secondary ball milling, abrasive and corrosive conditions predominate. The smaller balls [< 2½", (65 mm)] typically used in secondary milling ...

The 50 ton ball mill plays an irreplaceable role in mineral processing production, and its role is reflected in the following aspects: 1. Improve production efficiency. Due to its large capacity ...

Do you need a quick estimation of a ball mill's capacity or a simple method to estimate how much can a ball mill of a given size (diameter/lenght) grind for tonnage a product P80 size? Use these 2 tables to get you close. No BWi Bond Work Index required here BUT be aware it is only a crude approximation for "most soft ores" from F80 1 cm ...

Jaw crushers, Ball mills, Fluid energy mills. Ball mills, Jaw crushers, Fluid energy mills ... 25.4 kWh/ton. GATE-CH--mo-2mark. ... Particles of average feed size (25times 10^{-4}) m are crushed to an average product size of (5times 10^{-4}) m at the rate of 15 tons per hour. At this rate the crusher consumes 32 kW of power of ...

important calculate the operating speed of ball mill from the following data: diameter of ball mm (ii) diameter of 50mm operating speed of ball mill is …

program. At the time of this research, mill ball charged, feed rate, and average moisture were 7 tons (ball size was 100 mm) per week, 720 t/h and 5%, respectively. Then, ball abrasion rate was calculated by Equations 4, 5 and 6. Total mill feed per week = 720*24*7*0.95= 114912 tons (4) Total ball charge per week = 7*106 g (5)

Grinding Balls. Steel balls ranging from ¾ to 5 in. in diameter are used. Rods range from 1½ to 4 in. in diameter and should be 3 to 4 in. shorter than the inside mill length. Tube mills are usually fed balls smaller than 2 in., whereas 4- or 5-in. balls are more commonly used for ball-mill grinding.

DOVE small Ball Mills designed for laboratories ball milling process are supplied in 4 models, capacity range of (200g/h-1000 g/h). For small to large scale operations, DOVE Ball Mills are supplied in 17 models, capacity range of (0.3 TPH – 80 TPH). With over 50 years experience in Grinding Mill Machine fabrication, DOVE Ball Mills as ...

size, ball mills become increasingly less effi cient, ... Bond ball mill test energy and the 2.4 m mill which Bond used to calibrate his model. ... ton/m3 2.80 m3 Charge In terstitial above Balls ...

When Kincaid lignite was pulverized utilizing in-the-mill drying at product moisture content in the range of 11 to 12 percent, the comparison factor was 4.4 for pulverization in the ball mill and 4.5 in the hammermill. Power requirements at these conditions were 17.9 kwhr/ton in the ball mill and about 17 kwhr/ton in the hammermill.

DOVE supplies various types and sizes of Ball Mill Balls, including; Cast Iron steel Balls, Forged grinding steel balls, High Chrome cast steel bars, with surface hardness of 60-68 HRC. DOVE Ball Mills achieves size …

RETSCH offers the largest selection of laboratory ball mills in the market! Ball mills are among the most variable and effective tools when it comes to size reduction of hard, …

If you size a ball mill based on ; you use the hardness to derive the needed power to reduce to a target size at a particular throughput. From that "power draw" you …

Planetary Ball Mills. Sample volumes up to 4 x 220 ml. Final fineness*: 0.1 µm. Extremely high centrifugal forces result in high energy input. Dry and wet grinding by impact and friction. To the product range. Ultrafine grinding with up to 76 g.