The manufactured sand(M-sand) process is divided into wet process and dry process. Since the dry process appeared later than the wet process, and the dry process was developed on the basis of the traditional wet process, there may be people I feel that the wet method may not have more advantages than the dry method in terms of process. So, which one do you think is more suitable for the production of manufactured sand, wet or dry?
Regarding this issue, we should analyze it from the perspective of process objectives and production environment.
Regardless of whether the wet process or the dry process, its essence is to solve the problem of the powder and mud of the manufactured sand-due to the fierce collision of the stone material during the processing process, and the stone itself also contains soil, the finished product contains a certain amount of powder and mud. Stone powder, thereby affecting the gradation of manufactured sand.
The main difference between wet and dry process
The following is the flow of the two processes of manufactured sand.
Dry process flow of manufactured sand
Wet process flow of manufactured sand
It can be seen that the main equipment used in the two manufactured sand processes is basically the same, both of which are mainly crushers and sand making machines, and both can improve the quality of manufactured sand to a certain extent. The main difference lies in the treatment scheme adopted for the stone powder and mud content in manufactured sand.
After the crushing sand making process, the wet sand making uses a sand washing system (equipped with a sand washing machine) to reduce the soil content of the manufactured sand, so that the sand produced is better and of good quality.
Dry sand production uses a powder selection system (equipped with a powder separator) to separate sand and powder, to select high-quality sand particles suitable for construction sand. At the same time, the collected dust can also be used as a by-product.
It can be seen that the dry process is better than the wet process, but is the wet process really inferior to the dry process?
In fact, the wet aggregate sand making process not only has a market, but also has a large market share. This is because:
1, Although the traditional wet sand making process has many problems, such as a large amount of sewage and a coarser fineness modulus of the finished product, its strength lies in the high quality of the manufactured sand produced by this process, and its basic impact on the water content of the raw materials. There is no requirement on the above, which may be difficult to achieve in a dry process.
2, As the aggregate industry gradually shifts from the original extensive operation to the refined management, the production of sand and gravel also pays more attention to the control of resource recovery and utilization and the control of mud content. For example, there will be water pollution, The problems of low output of finished sand and high moisture content have now been solved.
3, The main difference between the wet and dry method lies in the washing process. The dry process does not need to consume a large amount of water, while the wet process requires a lot of water and is not suitable for dry and water-deficient areas. It is more suitable for rainy and water-rich areas. Therefore, for areas with sufficient water resources, a wet process is a good choice to reduce investment costs.
Therefore, when selecting the process of manufactured sand, both wet and dry processes have their own advantages and disadvantages, and the decision needs to be made according to actual conditions.