Mainland-based mineral mining crushing system default search and practice

Belt Conveyor closed. The conveyor belt conveyor after crushing ore, due to tape unloading, ore feed point by squeezing, shock, induced a lot of dust, while the tape under the

action of the roller bumps, dust raised over the tape, so you want to be sealed tape , taking into account the

Production and maintenance needs and save material, the use of single-layer cover airtight manner tape must be tightly sealed. Airtight cover and tape activities connected with

snap flap for easy sealing cover tape recovery after maintenance.  Dry vibrating screen

Round vibrating screen closed. Screening plant closed circular vibrating screen design uses locally confined, closed volume under the hood suction feeding height, particle size,

and the size of the different screen surface per square meter screen surface suction volume 8001200m3 / h selected with reference to similar conditions Concentrator dust suction

volume

Selection.

Cone crusher closed. The material unloading chute or fixed to the crusher cloth sieve disc, the dust with the dust material into the chute and induced air portion into the

crusher, and the other after hours of shock cloth spread upward, so the cone crusher feed port and the lower unload  coal mining machine

Discharge port shall be sealed suction, consider beneficiation process conditions, the cone crusher feed opening located closed suction hood, its suction volume reference to

similar processes or depending on the device type selected.

Suction hood design. In order to improve effectiveness and reduce the amount of exhaust cleaning, should take effective measures to prevent the spread of dust, and to dust cover

dust diffusion regions as close as possible. Dust hood exhaust pipe should be provided in the center of the diffusion region of dust, cover the mouth area and the exhaust pipe

area ratio

The maximum is 161. Determine the appropriate vacuum wind is conducive to effective trapping dust, but not so large particulate dust settling in the wind pipe, clogging pipes,

affecting dust effects.

Tape by feeding dust exhaust volume exhaust volume point Q is calculated as: Q = K1K2Q1 + Q2, (1) where, Q is the amount of dust exhaust point, m3 / h; Q1 for the material into

the whereabouts of the wind-induced , m3 / h; Q2 to make tape sealed hood to maintain a certain negative pressure is not tight crevice by the inhalation

The air flow, m3 / h; K1 correction factor for the material; K2 into the air amount correction coefficient is. Therefore, the calculation of the total crushing plant dedusting

unit air volume 26000m3 / h; screening dedusting unit total air volume 33000m3 / h.

Precipitator according to the actual situation of the small mill, wet dust removal system selection, screening and dedusting system design uses WSCII3.0 a vibrating wire

scrubber units, air volume required to meet the total amount of wind resistance 12001500Pa, water consumption 1215t / h ; crushing dedusting system selected

WSCII2.5 a vibrating wire scrubber units, air volume required to meet the total amount of wind resistance 12001500Pa, water consumption 1012.5t / h.

Blower fan total pressure calculation formula: Hf = (k1h + hc) k2, (2) where, Hf for the fan total pressure, Pa; h for the system piping resistance, Pa; k1 additional factor for

the resistance (1.151.2); hc is the dust resistance, Pa; k2 negative difference for the fan total pressure coefficient (1.05).

Fan flow calculation formula: Qf = k3k4q, (3) where, Qf the fan flow, m3 / h; q for the system exhaust volume, m3 / h; k3 for the system air leakage coefficient, k3 = 1.101.15;

k4 as dust Air Leakage coefficient, k4 = 1.10. According to calculations of the fan model G473119D; speed

1450r/min; equipped with a motor model Y225S4; motor power 37kW; air volume range 2910535052m3 / h; pressure range 26282440Pa.

Test results dedusting system is running, a small mill dust production point and the external environment dust concentrations significantly reduced. Dust dust production system

operating points before and after the dust concentration test results.

Luo river small mill job site dust concentration test results detecting dust concentration / (mg/m3) dust before the dust 8.003.20 after jaw crusher jaw crusher cone crusher

drop chute 16.256.30 8.504.33 Cone Crusher blanking off the chute 88.506.703 tape at 9.675.30

Vibrating Feeder drop chute 16.006.704 31.707.002 belt belt belt tail drop chute 26.707.306 12.407.00 environmental protection department of the crushing and screening system

stack emissions dust concentrations were detected, are in line with Integrated Emission Standard of Air Pollutants requirements.