Bunting has developed a new Electromagnetic Wet Filter with an ultra-high intensity magnetic field (from 3,500 to 10,000 Gauss). The magnetic separation technology separates fine iron and paramagnetic minerals from liquids and slurries, and is used in the ceramics, mineral processing and recycling industries, as well as in wastewater cleaning in steel production and power plants.
The high intensity magnetic field of the Wet Electromagnetic Filter allows the separation of magnetically weak particles that are not affected by other magnetic separation technologies. In the ceramic industry, the Wet Electromagnetic Filter removes problematic magnetic particles, both free iron and magnetic minerals, from slurries and glazes. In mineral processing, more powerful electromagnetic filters remove fine grinding iron and some paramagnetic minerals (e.g. hematite) found in non-metallic ores. Wet Electromagnetic Filters are also used to remove free iron and scale from water in power plants, steel mills and water recycling plants.
The Wet Electromagnetic Filter provides one of the most effective methods for continuously removing fine iron and problematic paramagnetic minerals from ceramic slurries and glazes, as well as industrial mineral slurries (e.g., kaolin, calcium carbonate, silica sand and feldspar). The technology produces higher separation efficiency than permanent magnetic separators and small electromagnetic separators by generating a significant strength in the background magnetic field in the canister (2,500 Gauss, 5,000 Gauss or 10,000 Gauss) and a high magnetic field gradient at the matrix surface. The magnetic field strength at the matrix surface is between two and three times the background field; for example, a background field of 5,000 Gauss will generate between 10,000 and 15,000 Gauss in the matrix.
An Electromagnetic Wet Filter consists of an electromagnetic coil located around a central hollow core containing a magnetic stainless steel matrix (400 series) of various designs. The high-efficiency, computer-designed coil generates a high-intensity magnetic field that intensifies at points on the matrix, creating the magnetic force necessary to separate paramagnetic particles from the sludge.
The magnetic coil is enclosed in a circular or rectangular steel housing designed to intensify the magnetic field in the hollow center of the coil. The oil-cooled electromagnetic coil design maintains thermal stability while generating high Gauss values. The coil designs are energy efficient and maintain low operating temperatures.
Valve shafts (for product feed and outlet, as well as cleaning water and air) are mounted at the top and bottom to suit the application and installation.
The removal of the captured magnetisms inside the Wet Electromagnetic Filter is done manually or automatically. For a fully automated operation, the Wet Electromagnetic Filter and the process are managed through a separate control. The control features a Siemens S7-1200 PLC incorporating Siemens HMI. Through the control, operators can set the frequency and parameters of the matrix cleaning regime.
The directional washing system ensures maximum removal of captured magnetics and paramagnetics from the matrix, maximizing the magnetic separation of the next batch of product.
The Wet Electromagnetic Filter is equipped with an integrated clamping device that allows easy removal of the matrix, poles and the complete canister for additional maintenance and cleaning. The clamping device minimizes production downtime while making matrix handling safer and easier. A separate transformer rectifier is used to supply power.
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