Magnetic separator, magnetic separator control device, and magnetic sludge removal method

A magnetic separator comprising:

• a magnet drum configured to:
• rotate in a state in which a part of an outer peripheral surface is configured to be immersed in a flow of a liquid to be treated containing a magnetic sludge, the magnet drum is configured to generate a magnetic force on the outer peripheral surface;
• a removing mechanism configured to:
• remove the magnetic sludge on the outer peripheral surface of the magnet drum from the outer peripheral surface of the magnet drum;
• a magnetic sludge containing information acquisition device configured to:
• measure content of the magnetic sludge contained in the liquid to be treated, and
• acquire magnetic sludge containing information relating to the content of the magnetic sludge contained in the liquid to be treated;
• and
• a control device configured to:
• change a magnetic sludge removal capability of the magnet drum depending on the magnetic sludge containing information acquired by the magnetic sludge containing information acquisition device,
• change the magnetic sludge removal capability of the magnet drum depending on the content of the magnetic sludge measured by the magnetic sludge containing information acquisition device, and
• stop, when the content of the magnetic sludge measured by the magnetic sludge containing information acquisition device falls below a reference lower limit value, the rotation of the magnet drum.

A grinding system comprising:

• a magnetic separator;
• a grinding device combined with the magnetic separator;
• a buffer tank;
• and
• a pump,
• wherein the magnetic separator comprises:
• a magnet drum configured to rotate in a state in which a part of an outer peripheral surface is configured to be immersed in a flow of a liquid to be treated containing a magnetic sludge, the magnet drum is configured to generate a magnetic force on the outer peripheral surface,
• a removing mechanism configured to remove the magnetic sludge on the outer peripheral surface of the magnet drum from the outer peripheral surface of the magnet drum,
• a magnetic sludge containing information acquisition device configured to acquire magnetic sludge containing information relating to a content of the magnetic sludge contained in the liquid to be treated,
• a control device configured to change a magnetic sludge removal capability of the magnet drum depending on the magnetic sludge containing information acquired by the magnetic sludge containing information acquisition device, and
• a housing,
• wherein the housing is comprised of:
• an inflow port into which the liquid to be treated flows,
• a flow path through which the liquid to be treated flows from the inflow port, and
• a discharge port out of which the liquid to be treated flows from the flow path,
• wherein the grinding device is configured to:
• grind a surface of a workpiece containing a magnetic material with a grindstone while supplying a coolant onto the surface, and
• discharge, into the inflow port as the liquid to be treated, the coolant containing the magnetic sludge generated during the grinding,
• wherein the magnetic sludge containing information includes grinding conditions of the grinding device,
• wherein:
• the coolant containing the magnetic sludge discharged from the grinding device flows into the inflow port via the pump,
• the coolant discharged from the discharge port is recovered in the buffer tank, and
• the coolant recovered in the buffer tank is supplied to the grinding device and reused.