Dry screening was once widely used and approved. There are now better options to fulfil the needs of advancing global marketplaces. Mining companies that use washing and scrubbing for materials can assure that their product is silt-free.
Mining businesses use washing systems to clean their resources for a variety of reasons. The overall goal is the same: to enhance the target product's quality by decreasing and eliminating impurities. Since of their chemical/mineral content, contaminants are regarded undesirable.
Washing is also used to accurately separate particles based on their size. When utilising washing screens, fine screening at small apertures is more efficient, resulting in higher capacity. Water aids in particle separation and functions as a conduit for the finest material to pass through the screen. Dry separation methods rely solely on gravity or air currents, neither of which allows for exact cut-point selection like water-based systems do.
Separation by air
Dry separation (e.g., old size screens for coarse fractions or air classifiers for sand/fines) cannot match the separation efficiency or product quality of a modern washing process. Latent moisture content, sticky or agglomerated materials, and the presence of low mass but variable size pollutants may all be managed much better via a wet system when mining companies wash minerals in this manner.
Depending on the application, the target product(s) and pollutants can vary greatly.
What is the common application of washing system?
The construction materials industry, particularly sand used in concrete manufacturing, is one of the most common sources of washing system requests. The majority of international standards for concrete sand specify precise sizing parameters that sand must meet. The cap on 'fines' is one part of this.
Excess particles in concrete sand can result in a variety of problems for the end user, including:
• Internal coherence is inconsistent, which could lead to fissures;
• Inconsistent drying time, which results in cracks and imperfections;
• Excessive cement usage (small particles have a higher surface to volume ratio);
Washing Equipment for Mining Materials
Generally, three methods are used for cleaning and sizing aggregates: screening, scrubbing, and washing.
1: Screening Units (Wet and Dry)
Screening is a widely acknowledged method for dividing aggregate/mineral feed into the correct size fractions. The majority of screens used in the mining and building materials industries are dry.
This product is suitable for virtually dry, particularly crushed material. It's also better to use dry systems upstream of crushers because they work best with low-moisture feed. If, on the other hand, there is a high residual moisture content, fines content, sticky clay, soil, or other pollution, adding water to the equation considerably improves quality and efficiency.
The log washersare intended specifically for mined and quarried materials that have a lot of clay or soil adhesion. It comprises of a main 'tub' with two parallel shafts equipped with exceptionally abrasion resistant high-chromium blades in a slightly inclined design. Water is added to the material, which is normally 100mm (4") in diameter and fed to the unit by conveyor or, in certain situations, a pre-screen. Within the unit, this creates a fluid bed in which the shafts and blades are mostly immersed. The blades forcefully thrash the slurred material and promote significant material-on-material contact as the shafts counter-rotate.
When it comes to wastewater treatment, Netsol Water is your best bet. In addition to providing the best products for your wastewater pre-treatment process, our team has the knowledge and experience to ensure that you obtain the optimum solution for your specific needs.
Contact the Netsol team now to learn more about how we can assist with the wastewater treatment process or to discuss your specific requirements.