Magnetic separators can only remove ferromagnetic metals, while non-ferromagnetic and weakly magnetic metals (such as stainless steel, high-anganese steel, high-chromium steel, aluminum, etc.) require metal detectors to detect them and control the belt conveyor to stop, so that workers can pick them out or various flaps valves can be controlled to divert the material. For sites with thick material layers and large particle sizes, metal pressed at the bottom of the material layer cannot be completely removed by the separator, and a metal detector must also be installed downstream of the magnetic separator. 

    Metal detectors are classified into magnetic material metal detectors and non-magnetic material metal detectors according to the nature the material. They are also divided into ordinary and high-sensitivity types according to detection sensitivity. Belt conveyor joints are best to be adhesive, and there should be no iron nails on the. For sites where the belt joint is a metal connection and cannot be changed to an adhesive one temporarily, our company's specially developed "Belt Metal Joint Automatic Identification Function System can be installed to solve the problem. 

    The GJT-1 type metal detector is a model specially developed for detecting metal in magnetic material belt conveyor systems (such as black and-ferrous metal mines, ironworks, sintering plants, etc.). It can suppress the "material effect" generated by magnetic ores with a grade below 70%.

   TheJT-2 type metal detector is mainly used in belt conveyor systems of industries such as thermal power generation, cement, papermaking, non-magnetic mines, forestry, environmental protection building materials, food processing, and grain. 

   The GJT-3 type metal detector is suitable for detecting metal impurities in non-magnetic material belt conveyor systems, and for industries special requirements for detection sensitivity such as food, chemicals, rubber, pharmaceuticals, plastics, leather, and clothing. The main unit design program is the same as the GJT-2F main unit, and the sensor structure is also the same. The main difference between the two is that the GJT-3F series uses small sensors, and the model specifications of series are divided by sensor height. For users with special requirements for sensor specifications and detection sensitivity, our company can specially design and manufacture them。