Vibrating screen is a kind of filtering mechanical separation equipment which is most commonly used in the solid mud treatment of mining industry.
Vibrating screen is widely used in mining, building materials, transportation, energy, chemical etc. It is used for material classifying, washing, dewatering and screening. In this article, you will learn about the installation and debugging (test run)of the vibrating screen and the operation skills to improve the screening efficiency, which will help you to be an expert in the vibrating screens area.
Installation of Vibrating Screen
(1) Install Supports or Hangers
The installation of each part shall be carried out in sequence in strict accordance with the drawings of support or hoisting, and the actual rigidity marked on the end face shall be matched before the installation of spring parts. The base of the shaker must be flat and stable.
(2) Installation of Screen Box
Connect the screen box to the supporting or hanging device, and adjust it according to the specified Inclination after installation. For hanging screens, the inclination angle of screen box and the level of main shaft of screen box shall be adjusted at the same time.
(3) Install Motor and V-Belt
During installation, the base of the motor shall be leveled, the motor level shall be corrected, the center line of the corresponding groove of the two belt wheels shall be overlapped, and the tension of the triangle belt shall be appropriate.
(4) Install and Secure Screen Panel
(5) Inspection After Installation
Check whether the feed chute, discharge chute and hopper under the screen collide during operation.
Test Run of Vibrating Screen
- Test running time of the vibrating screen is more than 8 hours. Observe whether the vibrating screen starts smoothly and quickly, whether the vibration and operation are stable, no special noise, and whether its amplitude meets the requirements.
- When the vibrating screen is running, the vibration of the screen box should not produce a horizontal pendulum. If the horizontal pendulum occurs, the reason may be that the height difference between the springs on both sides is too large, the tension of the hanging wire rope is uneven, the rotation axis is not horizontal or the triangular belt is too tight.
- Within 4 hours of running, the bearing temperature increases gradually, and then remains stable. The highest temperature does not exceed 75 ℃.
- If there is abnormal noise or a sharp rise in bearing temperature after start-up, stop immediately, check whether the shaft rotates flexibly and whether the lubrication is good, etc., and start again after troubleshooting.
- After running for 2 hours, stop to check whether the connecting parts are loose or not. If there is any loosening, wait for fastening and then start.
- If there is no fault after 8 hours of operation of the vibrating screen, the installation project can be checked and accepted.
Operation of Vibrating Screen
(1) Operator shall read the duty record and carry out the general inspection of the equipment before working. Check the tension of the triangle belt, the oil level in the vibrator, the tension of the screen surface, the fastening of the bolts and the damage of the screen surface.
(2) Start-up of vibrating screen should follow the process sequence.
(3) When the vibrating screen is running, it is necessary to check the working condition of the vibration exciter and the screen box. The temperature rise of the bearing should be checked after the vibrating screen is stopped.
(5) During the handover, the inspection should be done well, and the problems should be recorded in time.
(6) In order to prevent accidents, inspectors should keep their distance.
How To Improve Screening Efficiency
The screening efficiency directly affects the vibrating screen production efficiency, and the screening efficiency can usually be improved by the following ways:
- Improve opening rate of screen plate
- Adjust the feeding mode
- Self-cleaning screen plate
- Adjust vibrating screen inclination angle
- Try wet screening
- Adjust the counterweight
- Control feeding moisture content
- Additional fixed screen
In addition, reasonable and scientific installation, debugging and operation of the vibrating screen can effectively improve the classification efficiency, prolong vibrating screen service life and reduce the labor intensity of the operator.