SU719695A1 - Electromagnetic separator - Google Patents

Description

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The invention relates to the magnetic enrichment of minerals and is intended primarily for the division of mineral ore.

A known electromagnetic separator structure comprising inductors of a traveling magnetic field and a device for feeding source material into this field, such as a separator, in which the injector is molded as a solenoid with a winding connected to a multiphase AC network, and a device for feeding material includes a coaxially located inside a solenoid cylinder. The material is served. through the cylinder inside the solenoid, after which the non-magnetic components under the action of the force of the weight fall down, and the magnetic components of the inductor's magnetic field are carried vertically upwards and unloaded into another receiver. The electrically conductive components generally fall down along with the non-magnetic material, since the induction of the magnetic field is not enough to move them in a vertical direction upwards 1.

The disadvantage of the described separator is the impossibility of separating the electrically conductive and weakly magnetic components. Performing an inductor in the form of a vertical power supply to create sufficiently strong magnetic fields that can overcome the gravitational forces acting on weakly-magnetic and electrically conductive components and separate these components from

total flow.

The closest to the invention in terms of design features is an electromagnetic separator comprising a traveling magnetic field magnetic system with a feeder installed above it and receivers for separation products; moreover, to reduce the speed of the freely falling separated material between the beds

magnetic system installed partitions 2.

However, in this separator, the separation of components with a relatively small magnetic susceptibility and low electrical conductivity is difficult, since the magnitude of the force deflecting in a horizontal direction of the magnetic field for them is small and the time during which they freely move through the gap is not enough to clear them from the overall material flow. BeaTitrffiHe Interschina; po1 can help to eliminate this disadvantage, but it requires a lot of additional energy consumption. The installation of sloping wooden partitions in the gap to reduce the rate of falling material eliminates the disadvantage of this, and also reduces productivity. The purpose of the invention is to increase the efficiency of separation and to select the time spent on enrichment material in the Separation zone. The goal is achieved by the fact that the separator, which includes a magnetic system of a running magnetic field with a Nitel mounted above it and receivers for separation products, is equipped with a device for adjusting the position of the magnetic system, kinematically connected with the latter. installed on a horizontal axis with the possibility of its rotation, and an autogenerator sensor mounted on the output source of separation products and electrically connected to the magnetic system. The separator is shown in the drawing. FIG. 1 shows the proposed separator; in fig. 2 - section A - A of FIG. one; in fig. 3 - section B - B of FIG. 1. Electromagnetic separator includes Mreftffiyfiy cHcfetfyr tbStsu16 1. --.--. ... tsr .. inductors 1 and 2, made of packages of transformer sheet steel 3, in the grooves of which sectional windings 4 are placed, connected to the source 5 of three-phase alternating current; mounted over it is a feeder 6 in the form of a funnel and receivers for separation products. Inductors 1 and 2 are reinforced with a gap 10 between them on the horizontal axis 11 and can be rotated about this axis when the power supply of the device 12 is on the lever 13. On the receiver 7, located under Shtatle 6, the inductor 14 is fixed, which is a sensitive element of the autogenerator sensor 15. The output of the sensor is electrically connected to the device 12. The electromagnetic separator operates as follows. . . After the separator is put into operation, inductors 1 and 2 in the gap 10 create a dead magnetic field, alternating in the horizontal direction, shown in FIG. 1 with an arrow B. The source material is fed to the feeder 6 and then vertically downward in free fall between the inductors 1 and 2. The magnetic dipoles and eddy currents are induced by magnetic field of the inductors 1 and 2 in separate particles of the material with enhanced magnetic 86c Capacity and electrical conductivity. In the result of electrodynamic action of dipoles and eddy currents of these particles of a material with a magnetic field of inductors 1 and 2, they HcntiftiBaroT force action, directed in the direction of arrow B, deviate from the total flux H into the receiver 9. The material with dielectric and semiconductor properties does not interacts with the magnetic field of the inductors 1, 2 and falls vertically into the receiver 7. Particles of a material with a small magnetic susceptibility and electrical conductivity undergo a force action MafHHTHoro floor, insufficient For a clear deviation during the movement time in the gap 10, and partially fall into the receiver 8, and mainly into the receiver 7, causing the electrical parameters of the inductance 14 to change and the appearance of an electrical signal at the output of the autogenerating sensor 15. The signal of the sensor 15 is given in The operation of the device 12, which acts on the lever 13, rotates it and the inductors 1 and 2 associated with it relative to the axis 11 in the direction shown in FIG. 1 with an arrow G. In this case, the speed vector of the traveling magnetic field of the inductors 1 and 2, shown by the arrow D, makes some acute angle oL with the gUN. A running magnetic field, oriented in this way, exerts a force on the particles of a material with magnetic susceptibility and electrically conducting properties not only horizontally, but vertically upwards, reducing their speed of fall, which contributes to a clearer separation from the total material flow and direction to receivers 8 and 9. When the inductors 1 and 2 are rotated along arrow D, the quality of separation is improved; the content of ferromagnetic and electrically conductive particles of the material in the receiver 7 is reduced. Thus, the implementation of the rotary magnetic system allows to increase the separation efficiency, since a clearer separation of magnetic and electrically conductive particles is achieved by slowing down the speed of their falling and a corresponding increase in the residence time in the separation zone. under the influence of the vertical component of the traveling magnetic field; appearing when the inductors are rotated. Changing the angle of rotation of the inductors depending on the content of magnetic and electrically conductive particles in the final product of separation allows one to ensure that the residence time of these particles in the separation zone at which the highest quality separation of this material takes place. The described separator will allow the separation of cassiterite, which has semiconductor properties, from iron and copper sulphides with cheaper dry magnetic separation at a cost

Claims (1)

Claim An electromagnetic separator comprising a traveling magnetic field magnetic system with a feeder mounted above it and receivers for separation products, characterized in that, in order to increase the separation efficiency and selectively increase the time the enriched material is in the separation zone, it is equipped with a device for controlling the position of the magnetic system, kinematically connected to the last installed on the horizontal axis with the possibility of rotation, and a self-generating sensor installed at the output of one of PWB / ucts separation receivers and are electrically connected to the magnetic system.