Accès libre

Study on the crushing mechanism and parameters of the two-flow crusher

Wu Huang-Yi
Wu Huang-Yi
 et 
Yu Luo-Jian
Yu Luo-Jian
   | 31 mars 2022
Applied Mathematics and Nonlinear Sciences's Cover Image
À propos de cet article
Article précédent
Article suivant
Citez
Publié en ligne: 31 mars 2022
Pages: 875 - 890
Reçu: 31 juil. 2021
Accepté: 06 déc. 2021
DOI: https://doi.org/10.2478/amns.2021.2.00172
Mots clés
© 2021 Wu Huang-Yi et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Fig. 1

The working principle diagram of general impact crusher and two-flow crusher
The working principle diagram of general impact crusher and two-flow crusher

Fig. 2-1

Particle stacking process
Particle stacking process

Fig. 2-2

Completion of particle accumulation
Completion of particle accumulation

Fig. 2-3

Schematic diagram of particle velocity of uniaxial compression specimen
Schematic diagram of particle velocity of uniaxial compression specimen

Fig. 3

Diagram of the waterfall inlet and the impeller
Diagram of the waterfall inlet and the impeller

Fig. 4

Data from ‘large particles hitting small particles’
Data from ‘large particles hitting small particles’

Fig. 5

Data from ‘small particles hitting large particles’
Data from ‘small particles hitting large particles’

Fig. 6

Data of small particles hitting large particles at position 1 ‘waterfall inlet’
Data of small particles hitting large particles at position 1 ‘waterfall inlet’

Fig. 7

Data at position 2 ‘waterfall inlet’
Data at position 2 ‘waterfall inlet’

Fig. 8

Data at position 3 ‘waterfall inlet’
Data at position 3 ‘waterfall inlet’

Fig. 9

Particle feed rates
Particle feed rates

Fig. 10

Diagram of impeller speed
Diagram of impeller speed

Fig. 11

Data of rotating speeds
Data of rotating speeds

Fig. 12

Diagram of counter boards angle
Diagram of counter boards angle

Fig. 13

Data of counter board angles
Data of counter board angles

Fig. 14

Data of rotating speed
Data of rotating speed

Fig. 15

Distribution of counter boards
Distribution of counter boards

Fig. 16

The number of counter boards
The number of counter boards

Fig. 17

The materials of counter boards
The materials of counter boards

The physical parameters of particles and the inner wall of the crusher

Physical parameters Particles The inner wall of the crusher
Poisson's ratio 0.3 0.3
Shear modulus/GPa 0.56 70
Density/kg/m3 2630 7,800

Growth rate of the data

Position E (J) (Growth rate) F (N) (Growth rate)
Position 1 (7.5–35) 25,001.8 27,351.2
Position 2 (15–35) 24,952.6 (−0.20%) 34,496.7 (16.13%)
Position 3 (7.5–35) 25,786 (3.14%) 30,589 (11.84%)

Data growth compared with that at 1 m/s

Speed E (J) (growth rate) F (N) (growth rate)
1 m/s 25,260 37,772
2 m/s 25,119 (−0.56%) 31,998 (−15.29%)
3 m/s 24,898 (−1.43%) 333,34.6 (−11.75%)
4 m/s 24,424 (−3.31%) 27,429 (−27.38%)
5 m/s 24,154.7 (−4.38%) 31,862 (−15.65%)

Particle contact parameter settings

Contact parameter Particle-particle Particle-inner wall
The recovery coefficient 0.2 0.25
Static friction coefficient 0.5 0.7
Rolling friction coefficient 0.001 0.001

Comparison of counter boards angles

E (J) (growth rate) F (N) (growth rate) F (N) counter board 3 (growth rate)
0° 15,078.1 23,474.2 26,291.4
20° 12,941.7 (−14.17%) 12,498 (−46.76%) 16,175.2 (−38.48%)

Data growth compared at 795 rpm

E (J) (growth rate) F (N) (growth rate) F (N) counter board 3 (growth rate)
795 rpm (50 m/s) 10,001.3 11,175.3 15,532.5
875 rpm (55 m/s) 11,398.4 (13.97%) 14,622.5 (30.85%) 19,390.4 (24.84%)
1,035 rpm (65 m/s) 14,055.2 (40.53%) 15,025.6 (34.45%) 18,624.8 (19.91%)

Before and after optimisation

Counter boards angle a (°) Rotating speed (rpm) The distribution and number of counter boards Material
Before optimisation 30 955 14 (disjunctive distribution) Cr26
After optimisation 1,035 18 (continuous distribution) Cemented carbide (tungsten and titanium)
Material The maximum particle energy (J) The maximum force on the housing (N) The force on the counter boards (N)
Before optimisation Cr26 12,473.2 9,359.8 19,835
After optimisation Cemented carbide (tungsten and titanium) 14,130.3 17,235.1 10,619.7

Data compared with 795 rpm (50 m/s)

Rotating speed E (J) (growth rate) F (N) (growth rate)
795 rpm (50 m/s) 18,248.5 23,031.4
875 rpm (55 m/s) 20,529 (12.50%) 24,377.1 (4.54%)
955 rpm (60 m/s) 23,115 (26.07%) 25,053.4 (8.78%)
1035 rpm (65 m/s) 26,611.9 (45.83%) 31,649.4 (37.42%)
1115 rpm (70 m/s) 30,627.5 (67.84%) 33,809.1 (46.80%)
eISSN:
2444-8656
Langue:
Anglais
Périodicité:
Volume Open
Sujets de la revue:
Sciences de la vie, autres, Mathématiques, Mathématiques appliquées, Mathématiques générales, Physique
RSS Feed de la revue