Drum magnetic separator

FIELD: engines and pumps; mining.

SUBSTANCE: invention is used for processing of unsized material with fineness of up to 250 mm. Drum magnetic separator comprises non-magnet rotary drum, magnetic system installed inside drum, feeder and receiver. Magnet system is made of permanent magnet plates of neodymium-iron-boron, which are assembled in the first quarter of drum in the form of rings with alternating magnetic polarity along drum width. In the second quarter magnetic system is also arranged from permanent magnet plates of neodymium-iron-boron. They are assembled in the form of magnet rows with alternating magnetic polarity in the direction of material movement, with alternating pole pitch from 120 mm to 60 mm and possibility to combine separate plates in blocks.

EFFECT: higher efficiency of large-sized unclassified ore separation process, high selectivity of coarse grain products separation in the first quarter of drum, magnetic transport of coarse and selection of fine ones in the second quarter of drum.

1 cl, 2 dwg

 

The invention relates to the field of magnetic magnetite ore processing and can be used for processing unclassified material sizes up to 250 mm

Known electromagnetic separator comprising a non-magnetic drum and open combined electromagnetic radial system, located inside the drum [RF, A.S. No. 668706, IPC Vs 1/10, publ. 25.06.79, bull. No. 23].

The disadvantage of this magnetic separator is the presence of electromagnets, low magnetic field strength and considerable energy consumption.

The closest technical solution is a magnetic separator with adjustable magnetic system comprising a mechanism for changing the position of the blocks relatively to the axis of the magnetic drum [RF, A.S. No. 1153987, IPC Vs 1/10, publ. 07.04.83, bull. No. 17, (prototype)].

The disadvantages of this separator are in a low magnetic field on the surface of the nonmagnetic drum: 0,11-0,12 T with the maximum number of magnetic plates in the working block - 6 PCs, decreasing the number of plates up to 3 PCs - 0,035-0,04 T, and complex kinematics by changing the position of the rows relative to the drum surface, as well as limited scope.

The technical result of the invention is to improve the efficiency of the separation process lumpy declassifier the bathroom ore, high selectivity of separation of the products of the major factions in the first quarter of the drum, and magnetic transport of large and small selection in the second quarter of the drum.

This technical result is achieved in that in the magnetic separator containing a non-magnetic rotary drum and a magnetic system located inside the drum, feeder and receiver, what is new is that the magnetic system is made of plates of permanent magnets neogoniolithon scored in the first quarter of the drum in the form of rings with alternating magnetic polarity along the width of the drum, in the second quarter of magnetic system is made from plates of permanent magnets neogoniolithon printed in magnetic series with alternating magnetic polarity in the direction of travel of the material, with variable pole pitch of 120 mm to 60 mm, and the possibility of combining the individual plates in blocks.

In the magnetic separator magnetic system is made of permanent magnets in the form of rectangular prisms from neodimsoderzhashchikh alloys size 60×80×20 mm, which in the first quarter of the drum set in the form of rings with alternating magnetic polarity along the width of the drum, in the second quarter of magnetic system is made from plates of permanent magnets Nd - Fe-B installed on the magnetic core in the form of a magnet the s series with alternating magnetic polarity in the direction of travel of the material, with a variable pole pitch of 120 mm to 60 mm, and the possibility of combining the individual plates in the blocks to achieve the required parameters of the magnetic field, and the presence of sites with low magnetic field strength at the edge of the magnetic system for easy Assembly of magnetic material from non-magnetic shell. The presence of longitudinal and transversal components in a single magnetic system, in contrast to separate their installation allows to enrich large and small material without loss of valuable components. The presence of a ring system with high extraction ability allows you to extract all the valuable product in the first quarter of the drum, and a variable pole pitch and transverse magnetic rows in the second quarter of magnetic system allows you to transport krupnokuskovoy material without turning, and small - to expose the magnetic agitation periodicals with different pole pitch. The quality of the products is regulated by the centrifugal component of the process of separation and slide gate.

These differences allow to draw a conclusion on the conformity of the proposed technical solution the criterion of "novelty". The features distinguishing the claimed technical solution to the prototype, not identified in other technical solutions in the study of this and related areas of technology and, therefore, bespechivaet the claimed solution according to the criterion of "inventive step".

Figure 1 presents a schematic view of the separator. Figure 2 - view of the magnetic system without shells (a-a).

This separator consists of a rotating drum 1, with the possibility of speed control is located within the magnetic system 2 mounted on the yoke 3 and consisting of a magnetic core 4, the permanent magnets in the form of rectangles, 5, 6, 7, 8 different sizes. In the first quarter of the drum magnetic system is made in the form of rings 9 with alternating magnetic polarity along the width of the separator. The connection of different poles prevent metal spacers 16. The step of poles is chosen empirically and validated calculations in the system ELKuT. The second quarter of magnetic drum consists of series 6, 7, 8 with alternating magnetic polarity in the direction of travel of the material and volatile largest pole step from 120 mm to 60 mm Feeder 10, the gate 11 and the receivers of the products 12, 13 allow the process in a continuous mode. The magnetic core 4 consists of steel strips with a side height of 5-8 mm, fixed to the yoke 3 radially with the possibility of height adjustment to provide a calibrated gap of 4-5 mm between the surface of the magnets and non-magnetic shell. The original design of the magnetic circuit provides the required air gap and the entire configuration of a universal magnetic system ka is in axial and in radial directions. The system ends the section with the reduced field strength for a smooth descent of the material 15.

The operation of the separator is carried out as follows. Enrich the material through the feeder 10 is supplied to the surface of the magnetic drum 1 and its rotation is transported in the magnetic field of the ring magnet system 9, formed of a magnetic plate 5. The design of the magnetic circuit is made with possibility of installation on the vector radius of several magnetic plates and education of these blocks in order to achieve on the surface of the drum required magnetic induction in the range of 0.3 Tesla.

Thus, by using different options for the layout neodimsoderzhashchikh magnetic blocks with the number of magnetic plates 1 to 6, is achieved by the induction of necessary and sufficient for enrichment lumpy unclassified magnetite ore with different modes of separation.

The first quarter of the drum the material passes without magnetic agitation that is required for large - up to 250 mm pieces. Waste rock is separated exactly in the first quarter of the drum. Final adjustments are extracted at the first stage of separation of the material occurs in the second quarter of the drum transversely spaced magnetic rows 6, 7, 8, consisting the mi of plates of different size: 6, 7 - 60×80×20 mm 8 - 40×80×20 mm providing alternating pole step, the configuration and the field gradient. In the second quarter, it is also possible layout of the magnets in the blocks from 1 to 6. AC pole step provides a magnetic agitation and getting a quality product that enhances the efficiency of the separation of unclassified material. Magnetic product, attached to the surface of the magnetic drum 1, when the rotation is transferred to the receiver 13, and the non-magnetic product under the action of centrifugal and gravity falls within the receiver 12.

So that through the use of combined magnetic systems, it is possible to enrich lumpy unclassified material, which significantly extends the application of magnetic separation as an independent operation in mines, quarries, factories, without loss of valuable components.

Drum magnetic separator containing a non-magnetic rotary drum and a magnetic system located inside the drum, feeder and receiver, characterized in that the magnetic system is made of plates of permanent magnets neogoniolithon scored in the first quarter of the drum in the form of rings with alternating magnetic polarity along the width of the drum, in the second quarter of magnetic system is made from the Lastin permanent magnets neogoniolithon, dialed in magnetic series with alternating magnetic polarity in the direction of travel of the material, with variable pole pitch from 120 to 60 mm and the possibility of combining the individual plates in the blocks.



 

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