Calcium carbide particles, method for producing calcium carbide particles, and system for producing calcium carbide particles
A technology of particle manufacturing and calcium carbide, which is applied in the direction of calcium carbide and carbide
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Embodiment 1
[0029] For the above-mentioned pulverizer 20, the gap of the upper segment between the striking plate 22a of the rotor 22 and the crushing liner 23a of the crushing plate 23 is set to 50 mm, the gap of the lower segment is set to 30 mm, and the rotating speed of the rotor 22 is set to 45 m / s (650rpm), the carbide is fed from the supply port 21a at 40t / h. The amount of carbides passed through the sieve 30 after pulverization by the pulverizer 20 was 15 t / h, and the circulation ratio was (40−15) / 15=about 1.7. Table 1 shows the particle size distribution (mass basis) of the carbide particles (passed through the sieve 30 ) obtained by operating the pulverizer 20 for a long time at this circulation ratio.
[0030] [Table 1]
[0031] Sieve hole (mm)
4.75 or more
4.0 or above
4.0～3.0
3.0～2.0
2.0～1.0
1.0～0.5
0.5～0.15
Below 0.15
Ratio (%)
0.0
0.2
13.5
17.4
25.2
15.0
22.6
6.2
[0032] Average parti...
Embodiment 2
[0057] For the pulverizer 20, the gap of the upper section between the striking plate 22a of the rotor 22 and the crushing liner 23a of the crushing plate 23 is set to 55mm, the gap of the lower section is set to 32mm, and the rotating speed of the rotor 22 is set to 45m / s ( 650rpm), carbides were fed from the supply port 21a at a rate of 52.5t / h. The amount of carbides that passed through the sieve 30 after pulverization by the pulverizer 20 was 15 t / h, and the circulation ratio was (52.5−15) / 15=2.5. Table 4 shows the particle size distribution (mass basis) of the carbide particles (passed through the sieve 30 ) obtained by operating the pulverizer 20 for a long time at this circulation ratio.
[0058] [Table 4]
[0059] Sieve hole (mm)
4.75 or more
4.0 or above
4.0～3.0
3.0～2.0
2.0～1.0
1.0～0.5
0.5～0.15
Below 0.15
Ratio (%)
1.2
3.8
21.7
18.8
21.5
15.4
14.1
3.5
[0060] Average particle siz...
Embodiment 3
[0066] For the pulverizer 20, the gap of the upper segment between the striking plate 22a of the rotor 22 and the crushing liner 23a of the crushing plate 23 is set as 45mm, the gap of the lower segment is set as 22mm, and the rotating speed of the rotor 22 is set as 45m / s ( 650rpm), carbides were fed from the supply port 21a at a rate of 30t / h. The amount of carbides that passed through the sieve 30 after pulverization by the pulverizer 20 was 15 t / h, and the circulation ratio was (30−15) / 15=1.0. Table 5 shows the particle size distribution (mass basis) of the carbide particles (passed through the sieve 30 ) obtained by operating the pulverizer 20 for a long time at this circulation ratio.
[0067] [table 5]
[0068] Sieve hole (mm)
4.75 or more
4.0 or above
4.0～3.0
3.0～2.0
2.0～1.0
1.0～0.5
0.5～0.15
Below 0.15
Ratio (%)
0.0
0.1
6.3
15.5
19.7
21.1
17.3
20.0
[0069] Average particle size: 0...
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