1. Purpose:

The GMT type pulse demagnetizer is a new type of high-efficiency and energy-saving equipment. Widely used in the following industries.

The demagnetization before grading, screening, and filtering in the magnetic separation plant has a significant demagnetization effect. Demagnetization can significantly improve screening and grading efficiency, reduce the moisture content of the concentrate filter cake, and improve the comprehensive indicators of mineral processing.

In the heavy medium coal preparation system of the coal washing plant, the weighting agent used is ferromagnetic mineral powder, which has a large residual magnetism after magnetization and severe magnetic agglomeration phenomenon. The settling speed is fast and the stability is poor. Demagnetization can greatly reduce the settling speed of the magnetic medium and improve stability.

2. Characteristics

The CNC circuit board of GMT type pulse demagnetizer is made of imported branded integrated circuit blocks, and appropriate measures are taken to effectively isolate the interference of the main circuit on the CNC circuit board. Fundamentally ensuring the reliability, stability, and durability of the equipment.

Energy saving, this equipment consumes less power, requires less investment, and has quick results. The investment payback period for only energy-saving is less than one year.

The demagnetization field is strong and has a significant demagnetization effect, which can effectively eliminate magnetic agglomeration or flux of minerals, with less residual magnetism, making it particularly suitable for demagnetization of vanadium titanium ore.

The device has a sturdy structure and is easy to install and operate.

Comparison with manufacturers shows that its field strength, reliability, and durability rank among the top in the same industry.

The demagnetization tube adopts ultra-high molecular weight polyethylene slurry tube, which has a wear resistance degree 4-7 times that of steel tube. The demagnetization coil has good sealing and insulation performance, and can operate without slurry overload without burning out the coil. It is suitable for working in harsh working environments such as mines.

3. Model and letter representation meaning

4. Working principle

The main circuit power supply of GMT type high-frequency pulse demagnetizer is power frequency single-phase AC 380V, frequency 50HZ. In the main circuit, the demagnetization coil and its parallel pulse capacitor form an oscillation circuit. The CNC circuit board controls the two thyristors in the main circuit to alternately turn on and off in a timely manner, completing the charging of the pulse capacitor and the discharge of the LC oscillation circuit. A sine or cosine decaying magnetic field is formed in the demagnetization coil to achieve demagnetization.

5. Main technical parameters

Field strength: 85-195KA/m

Demagnetization wave frequency: 400－1000HZ

Power supply voltage: 380V

Environmental temperature:- 20℃－40℃

Outer diameter of mining pipe: 159, 180, 219, 325 (mm), can also be customized according to user size

Slurry flow rate: ≤ 3m/s

6. Installation and operation procedures

1. The distance between the control box and the demagnetization coil should be as short as possible to reduce line losses, generally not exceeding 10m.

2. The installation site should not have excessive dust, and the control box and demagnetization coil should not be wetted by water. The box should be reliably grounded.

3. The connection between the control box and the demagnetization coil should use a multi stranded copper core wire of not less than 10mm2 (16mm2 is recommended), and the power supply incoming line of the control box should use a multi stranded copper core wire of 2.5mm2 or more. The above connection can be selected according to the site situation, and the incoming hole of the control box should be avoided as much as possible to avoid line crossing.

4. In order to ensure the normal operation of the slurry tube and coil, a support or lifting frame that can balance and withstand gravity should be constructed. But metal objects must never be used to make supports or lifting frames.

5. To avoid blockage, the slope of the pipeline should be increased or the flow rate should be increased as much as possible during installation. If there is occasional blockage, it must be cleared immediately during work. It is necessary to regularly clean the mineral powder attached to the surface of the demagnetization coil, and check whether there is iron powder accumulation between the demagnetization coil and the slurry tube. The demagnetizer should also be closed in a timely manner to clean the accumulated iron powder, so as not to affect the demagnetization efficiency.

6. When shutting down the control box for maintenance, it is necessary to turn off the main power for 5 minutes or short-circuit and discharge the two ends of the capacitor before starting to work, in order to avoid injury caused by residual voltage of the capacitor.

7. When repairing other high-power equipment, be sure to turn off the demagnetizer first, and then turn off other high-power equipment; After the maintenance is completed, it is necessary to first turn on the high-power equipment and then remove the demagnetizer to avoid excessive voltage fluctuations that may damage the demagnetizer.

8. Press the start button when starting.

9. When the automatic switch for overcurrent air is disconnected, the cause should be identified before power transmission, and forced power transmission is not allowed.

7. Promise

1. Never name a wonderful trip (power outage).

2. Suitable for various magnetite and mechanical processing industries.

3. Within the specified range of slurry flow rate, the demagnetization effect is not affected by the amount and concentration of slurry.

8. Supplementary data

Installation location diagram, demagnetizer outline and installation dimension diagram, electrical schematic diagram, maintenance diagram