Crusher number calculation

Main factors influencing the crusher processing amount is not: the physical properties of material to be broken (may be broken, density, cleavage degree of humidity and size distribution, etc.), the process conditions (open or closed operation, reduction ratio, to a uniform petrolatum and Product size requirements, etc.) and equipment performance (crusher type, specifications and parameters, etc.). Calculation crusher large amount of processing, often associated with the actual results differ, and therefore need to be checked against the actual production data processing and process conditions similar ore beneficiation plant.
1. 颚, gyration and cone crusher
A open road broken
When the open circuit is broken, the processing amount is calculated as follows:
q=K 1 K 2 K 3 K4q8 (1)
Where q - the amount of crusher treatment under design conditions, t / h;
K 1 - ore hardness correction factor, K 1 =1-0.05 (Æ’-14) or look up Table 1;

Æ’ - ore Platt hardness coefficient;
ρ s - loose density of ore, t / m 3 ;
Ρ——ore density, t/m 3 ;
K 3 - the correction coefficient of the ore particle size, K 3 =1 + (0.8-d max /b) or look up Table 1;
d max - the maximum particle size of the ore, mm;
B——the width of the mine mouth, mm;
K 4 - moisture correction coefficient, check the table 1;
q s —— under standard conditions (medium hard ore, loose density 1.6t/m 3 ), handling capacity when open circuit breaking, t/h, when using ordinary type 颚, gyration and cone crusher , q s =q o b po or selected according to equipment sample data;
q o —— the processing capacity of unit discharge port width, t/(mm·h), see Table 2;
b p - the width of the crusher discharge port, mm.
Table 1 Ore hardness, ore size and moisture correction coefficient
Ore hardness correction factor K 1
Ore hardness grade
soft
Medium hard
hard
Extra hard
Platt hardness coefficient
10
11
12
13
14
15
16
17
18
19
20
K 1
1.20
1.15
1.10
1.05
1.0
0.95
0.90
0.85
0.80
0.75
0.70
Feeding grain size correction coefficient K 3
Ratio of maximum feed size to feed opening width d max /b
0.3
0.4
0.5
0.6
0.7
0.85
K 3
1.5
1.4
1.3
1.2
1.1
1.0
Moisture correction factor K 4
Moisture content in ore /%
4
5
6
7
8
9
10
11
K 4
1.1
1.0
0.95
0.90
0.85
0.80
0.75
0.65
[next]
Table 2 q o value of open, broken and cone crusher open circuit
Jaw Crusher
Crusher specifications / mm
250×400
400×600
600×900
900×1200
1200×1500
1500×2100
Q0o/t·mm -1 ·h -1
0.04
0.65
0.95~1.00
1.25~1.30
1.90
2.70
Rotary crusher
Crusher specifications / mm
500
700
900
1200
1400
1600
Q0o/t·mm -1 ·h -1
2.5
3.0
4.5
6.0~7.0
9.0~10.0
12.5~13.5
Cone crusher
Crusher specifications / mm
Φ600
Φ900
Φ1200
Φ1750
Φ2200
Q0o/t·mm -1 ·h -1
Standard or medium
1.0
2.5
4.0~4.5
8.0~9.0
14.0~15.0
Short head
4.0
6.5
14.0
24.0
Single cylinder hydraulic cone crusher
Crusher specifications / mm
Φ900
Φ1200
Φ1650
Φ2200
Q0o/t·mm -1 ·h -1
standard
2.52
4.60
8.15
16.00
Medium
2.76
5.40
9.60
20.00
Short head
4.25
6.70
14.00
25.00
B closed circuit broken
When the closed circuit is broken, the crusher passing capacity (through the capacity of the capacity meter) is calculated according to formula (2), and can also be corrected according to the passing ability given in the sample and the ore hardness, particle size, density, moisture and other factors.
q c =K c q s KK 1 K 2 K 3 K 4 (2)
Where q c - the amount of crusher treatment when closed circuit breaker, t / h;
K c —— When the closed circuit is broken, the average grain size variation coefficient of the ore is generally 1.3~1.4;
q s , K 1 , K 2 , K 3 , K 4 - the same formula (1)
Second, the light facing roller crusher
The amount of light facing the roller crusher can be calculated by the following formula or by sample data.
q=60πμD n Lb p ρ s (3)
Where q - the amount of roller crusher treatment, t / h;
D——roller diameter, m;
————Ore filling coefficient, μ=0.2~0.4, the crushed hard ore and coarse ore take large value, and vice versa;
N——roller rotation number, r/min;
L——roller length, m;
b p , ρ s with the formula (1)
The light facing roller crusher, the roller angle a (°) has great significance, generally calculated as follows:

Where d max - the maximum ore particle size mm;
D, bp with the formula (3).
According to the angular condition, in order for the crusher to work effectively, it is necessary to keep the broken material from being thrown. To meet this requirement, the crusher roll diameter should be greater than 22 to 25 times the maximum feed size. [next]
Third, the impact crusher
The impact crusher can be calculated according to one of the following two formulas, or can be selected according to the sample data of the equipment.
q=60KC(h+a)b 1 D n ρ s (5)
q=3600μνL a ρ s (6)
Where q - impact crusher throughput, t / h;
K——the correction coefficient of the theoretical processing amount and the actual processing amount, generally taking K=1.0;
————Ore filling coefficient, μ=0.2~0.7, hard ore and coarse ore take large value, and vice versa;
C——the number of hammers on the rotor;
b 1 - the hammer width, m;
H——plate hammer height, m;
N——rotor revolution number, r/min;
D——rotor diameter, m;
L——rotor length, m;
D——the gap between the counterattack plate and the hammer, m;
υ——The line speed of the hammer, m/s;
ρ s - the same formula (1).
The circumferential speed of the counter crusher rotor is 12~70m/s, generally 15~45m/s.
The rotor diameter D (mm) is determined according to the maximum ore particle size d max (mm), D ≥ 1.25d max +200.
Fourth, hammer crusher
The hammer crusher throughput can be calculated as follows, or it can be selected according to the equipment sample data.
q=60bLCdμmnρ s (7)
Where q - hammer crusher throughput, t / h;
D——mining size, mm;
b 1 , L - respectively, the width and length of the sieve gap, m;
C——the number of sieve gaps;
Μ——fullness and discharge unevenness coefficient, generally μ=0.015~0.07, small equipment takes small value, large equipment takes large value;
M——the number of hammer rows in the circumferential direction of the rotor, generally m=3~6;
n, ρ s - symbolic meaning is the same as formula (5), (6).
When crushing medium hard material and the crushing ratio S is 15~20, q=(30~45) DLρ s ; when crushing coal , q=ηLD 2 (n/60) 2 /(S-1).
Where η——material hardness and equipment structure type influence coefficient, η=0.12~0.22.

Auxiliary Machine

The heat-conducting oil is used as the me dium for heating. the segment heating design. Low energy consumption. uniform he at conduction. automatic pressure kee ping and heat preservation. Adopting three-plate two- pressure design. the hot-pressed aluminum honeycomb core board has good bonding effect

Auxiliary Machine,Coil Uncoiler Group,Coil Uncoiler Machine,Coil Uncoiler Mandrel

Zhangjiagang Zhong Lai Machinery Co.,Ltd. , https://www.alumajor.com

Posted on