Vibrating Mill

8/9/2019 Vibrating Mill

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FIELDS OF APPLICATION

AUBEMA Vibrating Mills are used for grindingof almost all materials in the processing industry,from medium-sized lumps up to finest grains. Theparticular fields of application are coal, chemicals,ceramics and pit and quarry industries, includingtheir subgroups.

FEED MATERIALS

Lignite, hard coal, ash, coke, charcoal, dolomite,marble, silica sand, limestone, bentonite, lime,gypsum, puzzolan, bauxite, copper granules, ironoxide, ferrosilicon, magnesium oxide, arsenide,aluminium oxide, silicon carbonate, zirconium,fireclay, corundum and similar products.

Twin-Tube Vibrating Mill with drive and counter-vibration frame, type 4210/04-25


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MODE OF OPERATION

Twin- and Three-Tube Vibrating Mills are driven byan unbalanced drive. The entire filling of the grind-ing cylinders, which comprises the grinding mediaand the feed material, constantly receives impulsesfrom the circular vibrations in the body of the mill.The grinding action itself is produced by the rotationof the grinding media in opposite direction towardsthe driving rotation and by continuous head-oncollisions of the grinding media. The residence timeof the material contained in the grinding cylindersis determined by the quantity of the flowing feedmaterial. The residence time can also be influenced

by using damming devices. The feed material passesthrough the grinding cylinders in a helical curveand slides down from the inflow to the outflow. Thehigh degree of fineness achieved is the result of thislong grinding procedure.Continuous feeding is carried out by vibratingfeeders, rotary valves or conveyor screws. Theproduct is subsequently conveyed either pneumati-cally or mechanically.

SPECIAL FEATURES

The driving motor is connected to the drive shaft ofthe mill via a propeller shaft. The centrifugalweights on the drive shaft are set in a way, thatthe vibration circuit diameter necessary for optimumgrinding results is achieved. The lubricated rollerbearings are protected by a special labyrinthsealing to ensure easy maintenance.The complete vibration system is positioned onspring elements, or alternatively on rubber buffers.If the transfer of vibrating power to the base of themill has to be reduced, the entire Vibrating Milland its drive will be put on an additional counter-

vibration frame.The grinding cylinders are filled to about 6070 %.Balls, cylpebs and grinding rods are used as grind-ing media. If the grinding is iron-free, balls orcylpebs of aluminium oxide are used. The grindingmedia are held up at the outflow heads by sepa-rating discs to ensure that only the ground materialcan flow out. Upon request, the grinding tubes areavailable in welded or bolted design. To protect thegrinding tubes, easily-replaceable cylinders madeof highly wear-resistant special steel are inserted.Owing to the location of the grinding tubes, one

above the other in a slanting position, differentoperating alternatives are provided.The Three-Tube Vibrating Mill was especiallydesigned for obtaining even higher capacities.It is distinguished by a low power consumption.


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OPERATING ALTERNATIVES

Twin-Tube Vibrating Mills

In the conventional model, the grinding cylindersare connected in series. The feed material passes

through both grinding cylinders and receives inten-sive treatment during this long grinding process.This method is required if the feed material is partic-ularly hard or coarse, or if very fine grinding resultsare required. The process is distinguished by ahigh degree of homogeneity.

If the cylinders are set parallel to each other, eachgrinding cylinder is charged separately, so thatonly half of the residence time is necessary. Thetreatment of the material is not so intensive and theoutput of the mill is correspondingly higher. This isadvantageous if the feed material is either soft or ofsmall grain size, or if a lower degree of fineness isrequired. The grinding cylinders can be operatedindependently of each other, to allow differentchemical reactions to take place.

With centre feeding, the highest capacity volumesare achieved because four lines are available.The residence time is correspondingly short. Thismethod of operation can be used if the feed materialis soft, if a gentle grinding process is required andif the ultimate degree of fineness is not so high.Inevitably, the mixed process is less intensive.With all methods of operation, additional materialscan also be fed into the mill.

Three-Tube Vibrating Mills

The highest degree of fineness is achieved by aconnected in series operation (1). At the same time,

the mill can be run with comparatively coarselumps both lower cylinders are available to carryout the extremely fine grinding work, while theupper cylinder performs the primary grinding func-tion with larger balls or rods.

Depending on the application, high capacity at ahigh level of fineness is obtained with two oper-ating methods, (2) and (3). Method (2) produces ahigher degree of fineness than method (3), with alarger permitted feed size although the capacityis lower. With parallel operation, as in (3), the

capacity is 50 % higher than of a Twin-TubeVibrating Mill with the same tube diameter.

The highest capacity, with a lower degree of fine-ness, is achieved by material fed on to the centreof the three cylinders (4) (e.g. for the production ofsand during grinding). This operating method in-volves short grinding procedures, resulting in ahigh capacity of up to 18 t/h, depending on thetype of material used.

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1.

2

3

1

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inlet

outlet

inlet

inletoutlet

outlet

inlet

inletoutletoutlet

outlet outlet


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DESIGN

Twin-Tube Vibrating Mill, type 4210

Three-Tube Vibrating Mill, type 4220

MAIN D IMENSIONS ( in mm)

Size a b c d e f g h i j k l m n o p q r s

4210/02-15 1468 1680 553 573 680 985 294 519 18 60,3 200 270 750 140 140 150 300 600 7804210/03-20 2331 2973 770 1210 1100 1392 402 736 22 82,4 300 300 1200 220 220 215 430 860 11404210/04-25 2791 3350 1070 1256 1320 1930 573 995 22 101,6 450 400 1400 320 230 322 580 1225 15654210/05-30 3610 4315 1295 1610 1650 2275 695 1200 22 152,4 550 400 1800 400 300 325 670 1320 17204210/06-35 3800 4890 1300 2040 1800 2350 710 1178 26 133,0 600 400 1900 580 320 435 680 1550 1950

t*

9001500180018002000

MAIN D IMENSIONS ( in mm)

Size a b c d e f g h i j k l m n o p q r s*

4220/05-30 3778 4880 1130 2040 1790 2430 590 1110 26 133 500 500 1900 580 320 110 1540 2140 2000

t

1325

MACHINE DATA

Reference values for Diameter of Length of Filling ofS ize required power Weight grinding cy linder grinding cy linder gr ind ing body Capacity

kW kg mm mm kg t/h*4210/02-15 4 450 200 2x1500 250 0,14210/03-20 18,5 1400 300 2x2000 1000 0,454210/04-25 37 3200 450 2x2500 2500 1,54210/05-30 75 6000 550 2x3000 4500 2,0

4210/06-35 90 7500 600 2x3500 6000 3,54220/05-30 132 10.000 550 3x3000 6500 3,0

*) Space required for replacement of wearing sheets

Further sizes are available on request. All dimension and performance data are standard values and subject toalteration.

*) Space required for replacement of wearing sheets

*) With medium-hard feed material, max. 6 mm, fineness 00,15 mm.


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V IBRAT ING MILL, TYPE 4210/04-25 VIBRAT ING MILL, TYPE 4210/06-35

VIBRAT ING MIL L, TYPE 4210/06-35 VIBRAT ING MIL L, TYPE 4210/06-35

ADVANTAGES

high and constant capacity high availability long lifetime easy replacement of wear and spare parts wide range of application high reduction ratio

SCOPE OF APPLICATION

feed size: up to approx. 16 mm product size: up to < 25 m

depending on the feedmaterial and its size

capacity: up to 20 t/h reduction ratio: up to 1: 30 required power: up to 132 kW

AUBEMA CRUSHING TECHNOLOGY GMBH KLNER STRASSE 94 51702 BERGNEUSTADT GERMANY

TEL.: + 49(0)2261/4094-0 FAX: + 49(0)2261/4094-350 MAIL: [email protected] INTERNET: WWW.AUBEMA.COM

PARTICLE SIZE DISTRIBUTION AND PERFORMANCE DIAGRAMS BASED ON ACTUAL RESULTS

capacity: 0,7 t/h feed material: broken glassspecific power requirements: 40 kW h/t

capacity: 2,2 t/h feed material: bentonite with quartzite inclusionsspecific power requirements: 32 kW h/t

capacity: a) 2 t/h, b) 3,2 t/h feed material: shalespecific power requirements: a) 35 kW h/t, b) 24 kW h/t

capacity: 2 t/h feed material: silica sandspecific power requirements: 35 kW h/t

particle size d (m or mm) particle size d (m or mm)

particle size d (m or mm) particle size d (m or mm)

Vibrating Mill

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