How to reduce dust of ready mix concrete batching plant

To reduce the dust of a ready mix concrete batching plant, you need to find out the origins of the dust and solve the problem accordingly.

 

Main sources of dust during the working process of ready mix concrete batching plants:

1. Sand and gravel transportation, loading and unloading trucks and natural stacking of dust caused by wind;

2. Caused by leakage and rolling during the forklift loading process;

3. A large amount of unorganized and non-directional dust generated when the aggregate bin leaks to the aggregate scale, and then unloads the material to the flat belt and is lifted by the inclined belt;

4. Pumping various powders or other methods of feeding and unloading of powder tanks causes various dusts on the top of the tank caused by the movement of the powder in the tank.

5. Various powders enter the mixer after being weighed, and the aggregates are lifted by the inclined belt into the pre-feeding hopper and then into the mixer, which produces a large amount of dust mixture.

Solutions to dust of ready mix concrete batching plants

1. Fully enclosed material yard and equipped with automatic sprinkler system: the gravel material yard is the place where there is a lot of dust in the mixing station, and the process of sand and gravel unloading can generate a lot of dust. Crushed stone has a high dust content, which is easier to generate dust during storage and transportation. The content of stone powder in sand (especially machine-made sand) is higher. A fully enclosed aggregate yard is introduced into the aggregate storage yard of the commercial concrete mixing station. The wall is made of hollow bricks of building materials, which not only prevents the dust from discharging the aggregates from being discharged into the surrounding environment, but also effectively reduces the noise pollution of construction vehicles. In addition, automatic sprinkler systems should be installed at the entrance and exit of the stockyard and aggregate bins to prevent vehicles entering and leaving the stockyard from bringing in and out dust and dust generated during the unloading process, and further reduce the dust concentration. The upper part of the silo should also be equipped with spray facilities to prevent dust generated during production and feeding.

2. Site hardening: the whole plant area (except the green area) should be hardened, which can not only ensure the quality of raw materials, but also reduce the dust caused by exposed wind on the site.

3. Fully enclosed mixing plant: The aggregate should be conveyed in a totally enclosed manner. For the large amount of dust at the interface between the pre-feeding bucket and the inclined belt, special dust removal equipment should be set up, which is collected and sent to the mixer for reuse. In addition, the powder silo should also be a fully enclosed structure. For the dust formed by the movement of the powder inside the tank caused by the different feeding and unloading methods of the silo, different dust removal equipment and methods are used to recycle it.

4. Research on feeding process: Experiment and research on the feeding sequence and cross feeding method of materials such as sand, stone, cement, water, etc., and get a set of good feeding process plan to effectively reduce dust emission.

5. Install automatic car washing machines in the factory: concrete tank trucks, powdered material transport trucks, and gravel material trucks entering the factory should pass through the automatic car washing machine to realize automatic cleaning to prevent dust from being carried out and brought into the factory.