the development direction of magnetic separator
With the development of science and technology, the transport belt is becoming wider and wider, the belt speed is getting higher and higher, the material layer is getting thicker and thicker, the processing capacity is getting larger and larger, and the impurity removal requirements are getting higher and higher. Put forward higher requirements. Therefore, the research and development direction of the future iron remover mainly has the following aspects.
(1) Fine iron removal.
As the raw materials are inevitably mixed with fine iron powder and equipment produced during the process of processing, fine iron powder is sometimes mixed with a small amount of iron-titanium minerals, but the industrial requirements for impurity removal are getting higher and higher. To remove this part of the smaller The iron impurities must improve the iron removal capability of the iron separator and develop in a fine direction.
(2) High magnetic field, high gradient.
According to the principle that the magnetic force is the product of the magnetic field strength and the magnetic field gradient, a variety of polymagnetic methods and better materials are applied so that the magnetic field strength of the iron separator at the center of the rated suspension height has reached 90, 120, and 150 mT, and the gradient is also increasing. The bigger it is, the bigger the magnetic force is. A super magnetic separator has appeared and its magnetic index is more than 4 times that of conventional separators.
(3) Energy saving.
Electromagnetic iron remover generates magnetic field by current, consumes a lot of electric energy during use, and its heat dissipation system also needs to consume energy. Although permanent magnet separators do not need to consume electrical energy, electromagnetic iron separators in certain industries have irreplaceable advantages (such as ceramic plants), so energy conservation and consumption reduction have become the development trend of electromagnetic iron separators. After analyzing the operating characteristics of the electromagnetic iron remover, a technical proposal was put forward: when the iron is present, the full voltage of 100 [[%]] is added to the exciting coil; when the iron is not present, only the iron has to be kept. The suctioned iron does not fall, plus a full voltage of about 10 [[%]], so that the entire equipment is basically cold during operation. This can not only solve the contradiction between coil heat dissipation and sealing, but also greatly increase the magnetic attraction when the iron is present, reduce the consumption of iron and steel material of the manufacturer and the overall cost, and reduce the cost of the manufacturer.
(4) Control Automation.
The control system that removes the iron and more uses the breaker-contactor logic control. Its reliability, flexibility, maintainability, self-checking ability, safety guarantee ability and communication ability are not high. Now the control system of the iron remover is often controlled by PLC, which not only improves its own reliability and reduces maintenance, but also can be easily networked with other automatic control systems. Under the unified management of the upper computer, the entire system and even the production of the enterprise are further improved. The degree of automation of the process. PLC is a digital computing operation electronic system, which is specially applied to the production site in the industrial environment. It is easy to form a whole with the industrial control system, with strong monitoring ability and easy expansion. At present, the control requirements are getting higher and higher. For example, with Ethernet, the configuration of the PLC has also evolved from simplification and miniaturization to complication and medium-sized development.
(5) Develop high-power iron remover.
The determination of iron removal capacity of iron remover is often characterized by magnetic field strength. The iron removing capability of the iron remover was studied, and it was considered that the factors influencing the iron removing ability were, in addition to the strength of the magnetic field, more importantly the power of the iron remover. Therefore, the development of high-power iron separators to improve iron removal capacity will be the future direction of development.
(6) Develop a new type of electromagnetic iron remover power supply.
The power supply is one of the main components of the electromagnetic iron remover, and its performance determines the operating state and performance of the iron remover. Although the use of diodes and thyristor manufactured by the SCR power supply has the advantages of simple manufacturing process, low cost, etc., but its AC harmonic components, low power factor, easy unbalanced phase and not suitable for intelligent control. A new type of iron remover power supply designed using IGBTs and MOSFETs was introduced. It has the advantages of high power, easy control, low cost, energy saving and easy connection with other smart devices. At the same time, in the design, the inductance of the electromagnetic iron separator is large and the DC resistance is small. This eliminates the need for some conventional power supply components such as intermediate frequency transformers or filter inductors, which reduces the cost and makes it higher. Cost-effective new electromagnetic iron remover power supply.