Dust refers to solid particles suspended in the air. Productive dust refers to solid particles produced by human production activities that can float in the production environment for a long time. It is an important occupational hazard that pollutes the production environment and endangers the health of workers. It is long-term inhalation Productive dust can cause pneumoconiosis, the mining belt transportation system generates a lot of dust during the production. Various factories and mines have done a lot of dust control to reduce the spillover of productive dust and strive to improve the production environment of workers.
Throughout all kinds of dust control equipment and facilities, all dust in the production environment is collected and disposed of through sealing and suppression methods. For the mining belt conveyor system, the characteristics of the belt transportation should be combined to analyze the causes of dust. Targeted governance, fundamental governance.
The conveyor belt conveyor system is composed of conveyor belts, driving machines, rollers, rollers, and frames. There are two reasons for the generation of dust in belt transportation. One is the dust generated at the receiving point and the unloading point, which is mainly due to the change of the material carrier. The material collides with each other or is affected by the air resistance and the movement direction of the tiny particles changes. , Floating in the air, forming dust, this type of dust is also commonly recognized dust, and there are many treatment methods. There are effective measures such as water mist suppression, enclosed dust collection, electrostatic dust collection, and the other is What people ignore is also the direct cause of the large amount of dust generated in long-distance transportation. The following specific analysis.
In the process of belt transportation, from the receiving point to the unloading point, the working surface of the belt is in contact with the material, and the material and the belt are relatively static, ignoring the airflow and the bumps of the belt, and basically, no dust is generated. After unloading, due to the tiny holes in the working surface of the tape and the electrostatic effect of the particles themselves, a part of the tiny particles will adhere to the working surface of the tape and transfer to the lower return tape, and the working surface of the return tape will keep contacting the tape idler. After contact with the roller, the tiny particles are squeezed by the roller or roller and the charge of the particles is changed. Part of the particles will be separated from the tape and float in the air to form dust. It is impossible for these particles to be detached all at once, and this action will take a long time and even the entire tape return journey. This phenomenon can be verified from the granular materials accumulated under the tape. The materials with large particles fall quickly due to gravity, and the materials with small particles float in the air.
Through the above analysis, it is not difficult to see that a large part of the dust in the belt transportation system is generated by the return tape, not the material on the tape. Therefore, the control of this dust can be considered from this aspect and fundamentally control to prevent the above phenomenon. After unloading is completed, water or other media are used to thoroughly clean the adhered particles on the working surface of the tape through the processes of cleaning, collection, and drying, and eliminate the phenomenon of dust returning from the tape.
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