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What does the accuracy and reliability of the metal separator depend on

What does the accuracy and reliability of the metal separator depend on

Issue Time:2020-10-27

The use of metal separators can improve product quality, protect production equipment, avoid potential risks of consumers using products, and improve corporate image. The metal separator can also be applied to the detection of nozzle materials, recycled materials, recycled materials and other products. The metal impurities before and after entering the crusher are removed. When choosing a metal separator, you need to consider whether the product contains moisture. If it contains moisture, the metal separator needs to be integrated. Product effect compression function to avoid false detection of product metal.

The metal separator can automatically detect and discharge metallic pollutants from free-falling raw materials, and allow clean products to pass freely through the removal device. When there are pollutants in the falling product stream, the pollutants will change the rate area generated by the detection coil. The electronic system can calculate the signal and send a pulse to the solenoid coil to eliminate the vapor-driven air column in the device. In this way, the pollutants will be separated from the high-quality raw material bundle, and to ensure the minimum loss of high-quality raw materials: in the presence of the same metal particles, adjust the elimination time to ensure that the raw materials are pollution-free.


The accuracy and reliability of the metal separator depends on the frequency stability of the electromagnetic transmitter, and the operating frequency from 80 to 800 kHz is generally used. The lower the working frequency, the better the detection performance of iron; the higher the working frequency, the better the detection performance of high carbon steel. The sensitivity of the detector decreases with the increase of the detection range, and the size of the induced signal depends on the size of the metal particles and the conductivity. Due to the current pulsation and current filtering, the metal detector has certain restrictions on the conveying speed of the detected items. If the conveying speed exceeds a reasonable range, the sensitivity of the detector will decrease. In order to ensure that the sensitivity does not decrease, a suitable metal detector must be selected to suit the corresponding product being detected. Generally speaking, the detection range should be kept as small as possible. For products with good high-frequency inductance, the detector channel size should match the product size. The adjustment of detection sensitivity should be determined with reference to the center of the detection coil, and the center position has the lowest induction. The detection value of the product will change with the change of production conditions, such as changes in temperature, product size, humidity, etc., can be adjusted by the control function to compensate for the repeatability of the spherical object, the smallest surface area, and the most difficult for metal detectors Detection. Therefore, the ball can be used as a reference sample for detection sensitivity. For non-spherical metals, the detection sensitivity largely depends on the location of the metal. Different locations have different cross-sectional areas, and the detection effect is also different. For example, when passing longitudinally, iron is more sensitive; while high-carbon steel and non-iron are less sensitive. When passing horizontally, iron is less sensitive, while high-carbon steel and non-iron are more sensitive. In the food industry, systems usually use higher operating frequencies. For food such as cheese, due to its inherent high-frequency induction performance, it will increase the response of high-frequency signals proportionally. Moist fat or salt substances, such as bread, cheese, sausage, etc., have the same conductivity as metals. In this case, in order to prevent the system from giving false signals, the compensation signal must be adjusted to reduce the sensitivity of the induction.

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