Method and system for removing iron ore particles adhering by magnetic hysteresis to a magnetic matrix of a vertical magnetic separator

A method for removing iron ore particles attached by magnetic hysteresis to a magnetic matrix of a vertical magnetic separator, with the vertical magnetic separator comprising:

• a separation ring comprising a magnetic matrix;
• a feed inlet for feeding ore into an ore accumulation vessel positioned in a lower portion of the magnetic matrix, with the accumulation vessel comprising an outlet of material with low magnetic susceptibility;
• a device for generating a magnetic field in a region of the accumulation vessel;
• at least one collecting tray positioned internally to the magnetic matrix to collect material with greater magnetic susceptibility detached from the magnetic matrix;
• and
• a collecting container to receive the material with greater magnetic susceptibility from the at least one collecting tray,
• the method comprising:
• demagnetizing iron ore particles in a position above a first collecting tray of the at least one collecting tray;
• scraping with a mechanical cleaning device the magnetic matrix in a position subsequent to the demagnetizer;
• and
• applying direct jets of compressed air against the magnetic matrix in a position subsequent to the mechanical cleaning device,
• wherein the method is free of water.