RCC Low Temperature Superconducting Magnetic Separator
Uses and Features
RCC low-temperature superconduct- ing magnetic separator uses superconducting magnets to generate a strong magnetic field required for iron removal. The advantage is that in the superconducting state (-268.8°C), there is current without resistance, and the current pass- es through the superconducting coil to generate a super-strong magnetic field. High magnetic field strength, large magnetic field depth, strong iron absorption ability, light weight, low energy consumption, energy saving and environmental protection, etc., the advantages that ordinary electromagnetic separators cannot match. It is mainly used to remove fine iron impurities con- tained in the coal seam.
Model Description
China’s first low-temperature supercon- ducting iron separator
Patent No：200710116248.4
Achievements
The low-temperature superconducting magnetic separator has passed the provincial and ministerial tech- nical appraisal and product appraisal in November 2008 and June 2010 respectively, and obtained the following three patents：
◆ One invention patent has been confirmed, the patent name is “low temperature superconducting strong
magnetic separator”（ZL200710116248.4）
◆ One utility model patent has been confirmed, and the patent name is “Superconducting Magnetic Sep- arator Suspension Device”（ZL 2007 2 0159191.1）
◆ One utility model patent has been confirmed, and the patent name is “Flexible protection device for the bottom plate of superconducting Magnetic Separator”.（ZL 200820023792.4）
Equipment structure
The low-temperature superconducting magnetic separator is mainly composed of the shell and the hang- ing device, the superconducting magnet part, the refrigeration system and the automatic control system. The superconducting magnet is hung on the shell, and the refrigeration system is used to maintain the temperature of the liquid helium.
The automatic control system can realize remote control and remote fault diagnosis through wireless network. The following figures are the three-dimensional schematic diagram and working pictures of the low-temperature superconducting magnetic separator.
Schematic Diagram
Automatic control and remote monitoring
The low temperature superconducting magnetic separator at the position of absorbing iron
The following figure is a schematic diagram of the shell and hanging device of the low-temperature su- perconducting magnetic separator
1.shell
2.Pressure Sensor
3.Hanging rod
4.positioning bracket
5.Fixing plate
6.elastomer
7.movable board
8.connecting bolt
9.Shell bottom plate
10.flexible rubber
11.connecting plate
12.High-manganese bottom plate
13.magnet
◆ The magnet 13 of the superconducting magnetic separator is fixed on the shell 1 through the Hanging rod 3, and the upper part of the Hanging rod 3 is equipped with a pressure sensor 2 to detect the force of the superconducting magnetic separator at any time.
When the superconducting magnetic separator is working, the tramp iron impacts on the high-manganese bottom plate 12 of the shell at high speed, forming pressure on the connecting plate 11. At this time, the elastomer 6 is compressed and deformed through the connecting plate 11 to absorb the impact energy. When the impact is large, When the elastomer 6 is compressed to a certain extent, the flexible rubber 10 is compressed to produce deformation and absorb impact energy, effectively ensuring that the shell 1 does not vibrate when the superconducting iron remover is working, thereby ensuring that the superconducting iron remover suspended on the shell 1 the magnet 13 works stably.
Working Principle
◆ The following figure is the schematic diagram of the structure of the superconducting magnet. The su- perconducting coil 6 is immersed in liquid helium 5. The liquid helium provides superconducting low tem- perature 4.2K when the superconducting coil is working. The liquid helium 5 is encapsulated in the high vacuum 4K Dewar 4. , In order to ensure the lowest heat leakage of the low-temperature Dewar, that is, the 4K Dewar, a 40K heat shield 3 and a 300K Dewar 2 are installed outside it to ensure that the system reaches thermal balance, so that the superconducting iron remover can work reliably and stably. The se- rial number 1 is a refrigerator .
1.refrigerator
2.Dewar
3.heat shield
4.4K Dewar
5.liquid helium 6.superconducting coil
◆ Due to the extremely high magnetic field intensity generated by the low-temperature superconducting magnetic separator, the huge magnetic field force will cause iron debris to impact the magnet at a very fast speed, which may cause damage to the superconducting magnet. Therefore, the superconducting magnet of the low-temperature superconducting magnetic separator is suspended on the shell through the Suspension Device. The shell is equipped with a national patented product - a flexible hanging de- vice. When iron debris violently impacts the magnet, this device can reliably absorb the impact energy, protect the superconducting magnet from damage, and ensure that the low-temperature superconducting magnetic separator can work well for a long time.
◆ The operation control part of the low-temperature superconducting magnetic separator adopts Chi- nese and English working interfaces, which is easy to understand, easy to use, easy to maintain, and can realize online transmission of operation records and online monitoring of operation status, realizing remote control and diagnosis,improve the reliability of equipment operation.
Advantages
◆ Low cost
1) The superconducting magnet of the superconducting magnetic separator adopts vacuum grease im- pregnation technology, which shortens the production time and reduces the production cost
2) Adopts liquid helium immersion cooling, negative pressure operation, zero volatilization, saving the cost of liquid helium, and improving the stability of the magnet operation.
3) Light weight, total mass about 8 tons, easier to install.
◆ Low operation and maintenance costs
1) The cold head is easy to maintain. Other companies’ products must be rewarming for cold head main- tenance, which takes about 15 days; while our company’s products can directly replace the cold head in a cold state, and the replacement time is only 1 hour, which can greatly save time, contribute to continu- ous iron separation and improve production efficiency.
2) Less loss of liquid helium when replacing the cold head. Replacement of cold head for other compa- nies’ products requires rewarming. After all the liquid helium in the magnet volatilizes, replace the cold head, and then fill it with liquid helium again to work normally;
However, our products can be replaced in a cold state, only a small amount of liquid helium volatilizes,
and can work normally without supplementing liquid helium.
3) low maintenance costs
◆ Easy to operate. It adopts Chinese and English interface, desktop computer control or touch screen computer control, which is easy to understand and operate.
◆ Remote monitoring. Multiple cameras are installed on site to monitor the operation status of the su- perconducting magnetic separator, and the on-site operation of the magnetic separator can be monitored remotely through the network. Its operating parameters are transmitted to the remote terminal through the network. By analyzing the operating parameters, the technicians can find out the possible problems of the superconducting magnetic separator in advance, and direct the on-site personnel to deal with them in advance or make a plan in advance to reduce the occurrence of failures.
◆ The excitation and demagnetization time is short. The magnetization time is 25 minutes and the de- magnetization time is 20 minutes.
◆ Strong ability to attract iron. The maximum weight of a single piece of iron that can be attracted is up to 8 kg, and the maximum amount of iron attracted in a single time can be up to 35 kg.
◆ Product safety is high. Segmented protection measures are adopted to achieve uniform energy dis- charge, reduce overvoltage in the magnet, and effectively protect the magnet; negative pressure opera- tion is adopted to improve the operating stability of the magnet.
Technical parameters
| Conveyor belt width mm | 1600 | 1800 | 2000 | 2200 | 2400 |
| Suspension height mm | 500 | 500 | 550 | 550 | 550 |
| Magnetic Intensity≥mT | 400 | ||||
| Magnetic field intensity at the bottom of the shell ≥mT | 2000 | ||||
| Machine power consumption≤KW | 30 | ||||
| Working system | Online iron separation—offline iron unloading—online iron separation | ||||
| Appearance Size mm | 1500×1500 | 1700×1700 | 1900×1900 | 2100×2100 | 2300×2300 |
| Weight kg | 6700 | 7200 | 8000 | 9500 | 11000 |
(For reference only)
Combined automatic iron separation device
Equipment using site
