Metal Impurities in Glass and Sandstone and Their Effective Separation
Glass products are mainly divided into two categories: flat glass and container glass. In the production process of flat glass, metal impurities may originate from aluminum components (such as aluminum parts in insulated glass), sensors, connectors, car window frames, as well as lead elements in wired glass or colored glass. In the production of container glass, metal impurities may be introduced by steel crown caps, aluminum screw caps, or steel and stainless steel brackets.
As the market demands increasingly higher quality for recycled glass as secondary raw materials, the recycled glass must be nearly free of ferrous or non-ferrous metal impurities. To obtain high-quality pure glass, the removal of metal impurities is crucial. Similarly, removing iron from mineral materials like sand and gravel is essential, as iron tends to rust in construction materials, affecting their appearance and longevity.
Ceramic blasting media and casting sand can also become contaminated during production, resulting in large amounts of material being discarded and sent to landfills, which not only wastes resources but also takes up valuable landfill space.
Key Technologies for Metal Impurity Separation
To effectively separate these metal impurities, we use durable magnetic separators equipped with wear-resistant replacement parts. In the process of metal separation from glass, mineral, and ceramic materials, the magnetic separator's resistance to material abrasion is critical. This is key to ensuring long-term stable operation and reducing maintenance costs.
The wear-resistant sheath of our magnetic separators is made of manganese steel. This design allows the wear-resistant casing to be easily replaced without the need to change the entire magnetic drum, significantly saving time and costs. Additionally, we can manufacture other parts of the magnetic separator, such as magnetic bar sleeves, chutes, and separation plates, from manganese steel according to customer requirements.
Belt Magnets for Coarse Ferrous Metals
For coarse and exposed ferrous metals (greater than 1 mm), we use reliable belt magnets for separation. These belt magnets are equipped with permanent magnetic fields and are widely applied in glass, sand, and gravel production lines due to their reliability and cost-effectiveness. Belt magnets can be easily and quickly installed above conveyor belts with minimal adjustment to the production line, ensuring efficient removal of metal impurities while minimizing product loss.
Drum Magnets and Magnetic Head Pulleys for Fine Particles
For fine or hard-to-separate iron particles, we use drum magnets or magnetic head pulleys for precise separation. These devices can handle complex materials, such as glass containing metal wires, achieving efficient iron removal. Magnetic head pulleys can be used interchangeably with the existing conveyor return rollers or purchased as complete systems. To ensure optimal separation, attention must be given to matching layer thickness, belt speed, and capacity during installation. The separation of iron parts can be optimized by adjusting the belt or drum speed and the positioning of the separating baffles.
Drawer-Type Iron Separators with High-Gradient Magnetic Bars
For extremely small iron particles and weakly magnetic materials, such as stainless steel, we have developed drawer-type iron separators equipped with high-gradient magnetic bars. This magnetic system is extremely powerful, capable of removing tiny encapsulated iron particles from glass, sand, and gravel. The system not only offers wear resistance but also precisely handles fine iron and weakly magnetic particles. This machine can also remove lightweight ferrous contaminants, such as organic residues in soil. Additionally, this technology can be applied to upgrade ceramic blasting media or casting sand, achieving effective separation of large amounts of stainless steel and fine iron particles, thus reducing contamination and improving material recyclability. The high-gradient technology often delivers impressive results, and we offer testing services to ensure the certainty of the final outcome for our customers.
