Double-Roll-Crushers are used for the crushing or medium-hard rock as well as for sticky and soft materials, i.e. clay, marl, limestone and similar raw materials. Sticky and soft materials are reliably crushed in 2 or 3 stages down to the required product size. Due to the low crushing ration, the thyssenkrupp Double-Roll-Crusher is producing a ...

Examples of calculations and test work programs are summarised. ... This paper unifies high-pressure grinding rolls crusher (HPGR) models of the working gap, mass flow rate, power draw, and centre ...

The following equation is used to calculate the Roll Crusher Capacity. C = V*L*D*S*60 C = V ∗ L ∗ D ∗ S ∗ 60. Where C is the roll crusher capacity (tons/hr) V is …

3,250- 6,550. 3,450- 6,900. 3,650- 7,300. 1) Crusher capacity calculated based on a typical run-of-mine feed material with an average raw density 2.6t/m3 and max. feed size less or equal to 80% of crusher feed opening. Actual values are depending on feed material characteristics (e.g. hardness UCS, feed particle size distribution, moisture ...

The capture of a crushed piece occurs due to the stop located on the roll (see Fig. 1 ); in this case, the condition for formation of a complex stress state in the crushed piece is observed, and the energy consumption is reduced by 39–40% [ 9 ]. Fig. 1. Schematics of the crusher with stops on a roll. Full size image.

The bearings on Double Roll Crushers can be equipped with temperature warning devices. Zero speed switches can also be installed to monitor the operation of the rolls. McLanahan Corporation's lab facility is fully capable of testing material to ensure the correct size and duty class of Double Roll Crusher is selected for your application ...

With Roll Crushers, of the material flow is processed between the roll bodies or roll and crushing plate. The space created between the width of the rolls …

If a 2 inch particle is fed to the roll crusher the absolute smallest size one could expect from the crusher is 1/2 inch. Roll crushers will only crush material down to a minimum particle size of about 10 Mesh (2 mm). ... Calculate the gear reduction ratio by dividing the second gear's number of teeth by the first gear's number. Reduce the ...

DOUBLE ROLL CRUSHER DR13 Features Solution for medium-hard rock as well as sticky and soft materials (coal, limestone, clay, salt, etc.) Weld-on hard-faced crushing teeth with various configurations for most difficult applications Integrated flywheel equalizing torque peaks, thus reducing required motor power Permanent parallel position of crushing rolls …

The power of the electric motor is determined taking into account the power expended to overcome all resistance forces during the operation of the crusher: NDR = N. 1 + N 2, (1) . where N1 – the power required for crushing the material; N2 – power expended on friction in the bearings; η – transmission efficiency.

Crusher housing 2. Fly wheel 3. Base frame 4. Fixed roll 5. Floating roll 6. Hydraulic gap setting system Working principle Material is fed by a continuous feed arrangement into the middle of the machine between both rolls (a). The rolls operate at 5 m/s or even higher, and shear and compression forces crush the material between the roll in the ...

Design Analysis and Calculations. 2.1 Roll Crusher Geometry. It is necessary to estimate the maximum size of the mineral particles that can be fed into the machine for a known …

Key Benefits. High throughput crushing. Consistent product size. Robust design. Low maintenance. Suitable for soft and medium-hard mineral materials. Products. Heavy-duty, high throughput crushers for the mining industry. The Double Roller Crusher is ideal for soft and medium-hard rock applications.

4.4 Design calculations 38 ... Shearing pins or nest in heavy coiled springs are provided in the crusher to guard against shock and over load. ... for further size reduction. Example - Cone crusher, reduction gyratory crusher, spring rolls, disk crushers etc. c) Fine crushers- Fine crushers have relatively small openings, and are used to crush ...

Estimate Jaw Crusher Capacity. Example capacity calculation of a 10″ x 20″ (250 mm x 500 mm): = 2800 x 0.25 x 0.5 x 0.5 x 225 x (1-0.2)/60 = 525 kg/hr = 13 TPD vs 300 to 420 TPD —> I can't …

L represents the axial length of the roller, and n represents the rotational speed of the eccentric shaft. The productivity of the crusher is given by Eq. (36). (36) Q = Q return, d o w n - Q stroke, u p + Q stroke, d o w n. Graphical representations of the data are shown in the Fig. 15, Fig. 16 and Fig. 17.

For example, a single-roll crusher, employ shear together with impact and compression. Shear crushing is normally used under following conditions. When material is somewhat friable and has relatively low silica content. For primary crushing with a reduction ratio of 6 to 1. When a relatively coarse product is desired, top size usually larger ...

How Single Roll Crushers Work. A Single Roll Crusher is made up of a toothed roll assembly, which crushes the incoming feed material against a crushing plate. The Single Roll Crusher is designed to reduce larger feed sizes to the desired product size at a 6:1 ratio of reduction while producing a considerably lower percentage of fines.

Abstract. This chapter deals with the designs and operation of different types of roll crushers. Two main types are indicated. The first type where the rolls are rotated …

In experimental studies of the solid fuel crushing process, a four-roll crusher DCHG 900 × 700 was used with the following technical characteristics: weight of the lower rolls m r = 4350 kg; stiffness of a complete set of springs (2 × 6 = 12 pcs.) of the shock-absorbing device of the rolls k spr = 6.25 × 10 6 N/m; roll bandage diameter R = 1 ...

For example, a single-roll crusher, employ shear together with impact and compression. Shear crushing is normally used under following conditions. When material is somewhat friable and has relatively low silica content. For primary crushing with a reduction ratio of 6 to 1. When a relatively coarse product is desired, top size usually larger ...

Tests were conducted with the drive uncoupled from the crusher just before the crushing event to measure the slight deceleration during crushing. This allows the calculation of the energy consumption for comminution. 50 samples of limestone (Bad Kösen, as per Table 2) were tested at a nominal speed of 124 RPM and s = 2.0 mm gap …

Roll Crusher wear parts. CSP for over 30 years has been designing and supplying custom and replacement roll crusher wear parts for the mining, recycling, and power industries. Using our proprietary alloys CSP Roll Crusher wear parts deliver the highest throughput requirements under extreme conditions. CSP has developed and successfully supplied ...

the crusher and scalp out fi nes. Primary gyratory crushers – ideally suited to all high-capacity primary hard rock crushing applications. Jaw crushers – we have more installed jaw crushers than anyone in the world. The lead-ing choice due to their high reduction ratio and heavy duty design. Cone crushers – capacities available to suit all

For example, a single-roll crusher, employ shear together with impact and compression. Shear crushing is normally used under following conditions. When material is somewhat friable and has relatively low silica content. For primary crushing with a reduction ratio of …

They can be used in coal, salt, coke, glass, and trona operations, among others. Triple Roll Crushers combine a Single Roll Crusher with a Double Roll Crusher to form a crusher that is capable of achieving a 6:1 reduction ratio in the primary stage and a 4:1 reduction in the secondary stage while producing a cubicle product at high capacity.

Double Roll Crusher Brochure. Typically used as secondary or tertiary crushers, McLanahan Double Roll Crushers provide a 4:1 reduction ratio and can be used following other McLanahan equipment, such as Feeder-Breakers, Rotary Breakers, primary DDC-Sizers, or Single Roll Crushers, when further reduction of primary crushed material is …

calculation procedure for the crushing power of crushers is presented, and recommendations for the selection of the minimum resolved particle size are given. Keywords: comminution; gyratory crusher; discrete element method; torque; particle breakage 1. Introduction Comminution is the progressive reduction in size of run-of-mine …

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4. ROLL CRUSHER Roll crushers are used for producing additional reductions in the sizes of stone after the output of a quarry has been subjected to one or more stages of prior crushing. Roll crushers have a theoretical MAXIMUM reduction ratio of 4:1. If a 2 inch particle is fed to the roll crusher the absolute smallest size one could …