CN100577300C - Continuous Discrete Rare Earth Permanent Magnet High Gradient Magnetic Separator - Google Patents

Abstract

The continuous discrete type rare earth permanent magnet high-gradient magnetic separator of the present invention, according to the difference in the magnetic susceptibility coefficient of the particle volume ratio, under the action of the high specific magnetic force generated by the combination of the high-intensity magnetic field and the high-gradient magnetic-gathering medium, the fine-grained materials are separated. Don't. The whole machine is composed of frame, driving device, sorting disc, sorting box, rare earth permanent magnet, mine feeder, magnetic product receiving tank and flusher, etc. It has a large cavity volume and special-shaped permanent magnet opposite pole window frame type High-field-strength rare-earth permanent magnets, multi-dimensional magnetic separation separation medium stack, high discrete pulp separation box system, multiple groups of continuous separation disks axially superimposed combination structure and frequency conversion speed control. The invention has the advantages of large single-machine processing capacity, simple structure, convenient operation and maintenance, energy saving, stable production process, high separation precision, low equipment investment, low production cost, and good separation technical indicators. Impurity removal and purification of magnetic metal minerals and non-metallic minerals.

Description

Continuous Discrete Rare Earth Permanent Magnet High Gradient Magnetic Separator

technical field

The invention relates to a magnetic separator for ore dressing, which is suitable for fine-grained weak magnetic metal ore powder or non-metallic fine-grained powder ore and other materials. Under the action of the high specific magnetic force generated by the combination, it is a high-efficiency rare earth permanent magnet high gradient magnetic separator for separation.

Background technique

At present, the demand for imported iron ore in my country's iron and steel industry is nearly 200 million tons, and nearly 15-20% of the domestic proven iron ore resources are complex and refractory ore resources. When mining complex and refractory iron ore, usually magnetic separation It is one of the important beneficiation methods. Foreign companies engaged in industrial wet strong magnetic separation equipment (or high gradient) mainly include Humboldt Wedag AG in Germany, Eriez Magnetics, Inc. in the United States, Sala Magnetics in Sweden, and Czech Republic. VMS company, etc., these strong magnetic separation equipment except Eriez has an "iron wheel" magnetic separator that uses a lower field strength permanent magnet, the rest are provided by different forms of electromagnets to provide the sorting background magnetic field, and the separation The selected medium mainly adopts plate, net and rod medium. Domestic industrial wet-type strong magnetic separation equipment (or high gradient) also uses electromagnets to provide the background magnetic field for separation, but there are large investment in equipment, high operating costs, and low effective recovery of fine-grained magnetic minerals (-40μm) ( about 30%) and other issues.

Contents of the invention

The purpose of the present invention is to provide a continuous discrete high-gradient magnetic separator with large processing capacity and high-efficiency separation, which is used for fine-grained mineral separation.

In order to achieve the above object, the technical scheme of the present invention is as follows: a continuous discrete type rare earth permanent magnet high gradient magnetic separator, which consists of a sorting combination part, a driving device and a frame, a mine feeder, a magnetic product receiving tank, a flushing device, etc. Component composition. The sorting combination part is composed of a sorting disc, a sorting box and a rare earth permanent magnet. The sorting disc and the large-diameter hollow shaft form an integral rotating part. A detachable medium stack is installed along the periphery of the sorting disc. The sorting box is The non-magnetic container that can be filled with liquid is placed in the cavity where the rare earth permanent magnet is parallel to the permanent magnet pole. The rare earth permanent magnet is a permanent magnet pole window frame magnet structure with a large cavity volume. Sometimes more than 1/3 of the ring part runs in the rare earth permanent magnet and is soaked under the liquid level in the sorting box.

According to the requirements of the processing capacity, the sorting disc, sorting box and rare earth permanent magnets adopt one or more sets of axial multi-stage superposition combination.

Rare earth permanent magnet The S pole and the N pole of the opposite pole are made of NdFeB rare earth permanent magnet materials to form a magnet with an arc surface on the upper part and a wrapping angle of 140°~180°. It forms a cavity window frame magnet structure with an iron yoke. The magnet and the rack are fully separated from each other.

The filling rate of the medium stack in the sorting tray is 20% to 30%. The medium stack is assembled into a multi-dimensional separation fan-shaped block by high magnetic permeability and low remanence magnetic stainless steel material. High density and uniform arrangement, the magnetic induction intensity on the surface of the medium reaches 1.3-1.5 Tesla, and the surface magnetic field gradient reaches 10 ⁴ to 10 ⁶ .

The inside and outside of the sorting disc correspond to the lower and upper parts of the ore-connecting tank for magnetic products. There are cleaners and flushers respectively. The running speed of the selection disc is continuously adjustable within 0-20 rpm.

The present invention adopts high magnetic energy product rare earth permanent magnet materials to pile up large cavity volume special-shaped permanent magnet opposite pole window frame type high field strength magnets, which replaces high energy consumption and high cost electromagnetic magnets; selects high magnetic permeability and low remanence magnetic conduction stainless steel materials , the shape of the separation medium is determined through the separation test research, and assembled into a special-shaped multi-dimensional magnetic separation medium stack; the high discrete separation system technology is used to make the fine-grained pulp fluid uniformly dispersed in the separation chamber in industrial production, and single ore The particles pass through the separation area at a constant speed and drop, and at the same time, the mutual adsorption (molecular force adsorption) between the non-magnetic particles and the weak magnetic particles is greatly reduced to ensure the high-efficiency magnetic separation of fine-grained minerals; , stable operation, energy saving, precise speed control, simple operation, and convenient adjustment; the sorting disc and magnet adopt an axial multi-stage superposition combination structure to ensure the large processing capacity of the single machine equipment; Road jet spray cleaning device and reverse flushing ore unloading device effectively ensure the control and adjustment of the quality of magnetic and non-magnetic products, and at the same time ensure the cleanliness of the media stack after sorting, making the production index of continuous operation stable . The whole machine has the advantages of simple and compact structure, light weight, small size, greatly saving equipment investment and production costs, low energy consumption, large processing capacity and high separation efficiency. And other materials magnetic separation impurity removal, refining and other fields to promote application.

Description of drawings:

Fig. 1 Front view of continuous discrete rare earth permanent magnet high gradient magnetic separator.

Fig. 2 Side view of continuous discrete rare earth permanent magnet high gradient magnetic separator.

Fig. 3 Schematic diagram of the structure of the rare earth permanent magnet of the continuous discrete rare earth permanent magnet high gradient magnetic separator.

Fig. 4 Schematic diagram of the separation and combination part of the continuous discrete rare earth permanent magnet high gradient magnetic separator.

Detailed ways

Embodiment: As shown in the accompanying drawing, the continuous discrete type rare earth permanent magnet high gradient magnetic separator consists of a frame 1, a sorting combination part (sorting box 2, sorting disc 9, rare earth permanent magnet 8), and an ore feeder 3 , cleaning device 4, magnetic product receiving tank 5, sorting medium stack 6, flushing device 7, driving device 10, frequency conversion speed control electric control box 11 and other main components. The two ends of the inner diameter of the sorting disc 9 are respectively fixed with the large diameter hollow shaft to form an integral rotating part, which is driven by the drive device 10 and controlled by the frequency conversion speed control electric control box 11, and rotates around the hollow shaft. The fan-shaped stainless steel medium heap 6 that can be easily disassembled is housed in the periphery of the sorting disc 9 . Rare earth permanent magnet 8 is composed of S pole 12, N pole 13 and iron yoke 14 stacked with high energy product rare earth permanent magnet materials to form a large cavity volume permanent magnet opposite pole window frame magnet structure, and the uniform magnetic induction intensity of the closed magnetic field background reaches 0.98 Tesla, the rare-earth permanent magnet 8 and the rack 1 adopt full magnetic isolation treatment, and the S pole 12 and the N pole 13 are respectively piled up by NdFeB rare earth permanent magnet materials. A magnet with a wrap angle of ~180° ensures that more than 1/3 of the ring part runs in the magnet when the sorting disc rotates. The sorting box 2 is an arc-shaped container of non-magnetic material, which is placed in a cavity parallel to the opposite pole of the rare earth permanent magnet 8 and is surrounded by magnets. Run in and soak under the liquid level of sorting box 2. The sorting disk 9, the sorting box 2 and the rare earth permanent magnet system 8 of the 2-group sorting and combining part are superimposed and combined in the axial direction. The ore feeding distributor 3 is located above the part where each sorting disc enters the magnet. When feeding ore, the ore pulp is vertically downward from the inner ring of the sorting disc 9, and enters the sorting box 2 through the medium stack 6 along the radial direction of the sorting disc in the magnet. ; Corresponding to the lower and upper parts of the magnetic product receiving tank 4 inside and outside the sorting disc 9, a cleaner 4 and a flusher 7 are respectively provided. The rotation speed of the sorting disc is continuously adjustable within the range of 0 to 20 revolutions per minute controlled by frequency conversion, and the washing water, flushing water and sorting speed are adjusted according to the product quality requirements.

Working process: According to the technical requirements of the sorting process, set the sorting speed of the sorting disc 9, start the sorting disc 9, open and adjust the amount of cleaning water and flushing water, and discharge the non-magnetic product at the bottom of the sorting box 2. Adjust to a certain degree of opening, control the sorting box 2 to maintain a certain stable liquid level, pulp the material to be selected according to a certain concentration, control a certain amount of pulp to feed the pulp stably through the ore feeder 3, and sort The disk 9 is partly soaked in the sorting box 2 and rotates in the permanent magnet 8. The pulp with a certain concentration is fed into the sorting box 2 from the upper part of the sorting box 2 through the medium stack 6 of the sorting disk 9, and the non-magnetic particles pass through The medium stack 6 is discharged from the bottom of the sorting box 2 into the non-magnetic product tank; the magnetic particles are adsorbed on the surface of the medium body and rotate with the sorting disc 9, and are cleaned by the cleaning water of the washer 4, and are separated from the magnetic field area and sorted with the rotation of the sorting disc 9 After the box, the washer 7 reversely flushes from outside to inside along the radial direction of the sorting disc 9, and discharges the magnetic particles into the magnetic product receiving tank 5, thereby realizing the separation of non-magnetic mineral particles and weak magnetic mineral particles. The rotation of the selection disc 9 enters the feeding area of the sorting box 2 again for cyclic feeding-sorting-discharging to realize continuous sorting.

The recycling and sorting test of 10μm tailings in an iron ore concentrating plant shows that the grade of iron concentrate reaches 57.16%, and the recovery rate of concentrate Fe reaches 60%. Unrealizable technical indicators, but also save 95% of electricity than electromagnetic separation equipment.

Claims (7)

1, a kind of continuous discrete type rare earth permanent magnet high gradient magnetic separator, comprise the sorting built-up section, drive unit and frame, ore feeder, the magnetic product mine-carrying groove, washer and syringe, it is characterized in that: the sorting built-up section is by separator plate (9), separatory vessel (2) and rare earth permanent magnet magnet (8) are formed, separator plate (9) constitutes whole rotary part with big barrel dliameter hollow shaft, along periphery removable media heap (6) is housed in the separator plate (9), separatory vessel (2) is for filling with the non-magnetic conduction container of liquid and placing rare earth permanent magnet magnet (8) and permanent magnetism in the extremely parallel cavity, rare earth permanent magnet magnet (8) be big cavity volume permanent magnetism to utmost point window frame formula magnet structure, separator plate (9) has in the running greater than 1/3 annulus part and moves in rare earth permanent magnet magnet (8) and be immersed under the liquid level in the separatory vessel (2).

2, continuous discrete type rare earth permanent magnet high gradient magnetic separator according to claim 1 is characterized in that: separator plate (9), separatory vessel (2) and rare earth permanent magnet magnet (8) can adopt axial multi-stage superimposed formula combination more than 1 group or 1 group according to the size that treating capacity requires.

3, continuous discrete type rare earth permanent magnet high gradient magnetic separator according to claim 1 and 2, it is characterized in that: it is cambered surface that rare earth permanent magnet magnet (8) is piled into top to the utmost point S utmost point (12) and the N utmost point (13) by Nd-Fe-B rare earth permanent magnetic material, the magnet that cornerite is 140 °～180 °, form cavity window frame formula magnet structure with iron yoke (14), the even magnetic induction intensity of closed magnetic field background reaches 0.8～1.0 tesla, and rare earth permanent magnet magnet (8) is taked entirely every magnetic treatment with frame (1).

4, continuous discrete type rare earth permanent magnet high gradient magnetic separator according to claim 1 and 2, it is characterized in that: separator plate medium heap (6) pack completeness is 20%～30%, media stack (6) is assembled into multidimensional sorting secter pat by the magnetic stainless steel material medium of high permeability, low remanent magnetism, the medium arragement direction with flow to the ore deposit parallel, being high density evenly arranges, dielectric surface magnetic induction intensity reaches 1.3～1.5 teslas, and the Surface field gradient reaches 10 ⁴～10 ⁶

5. continuous discrete type rare earth permanent magnet high gradient magnetic separator according to claim 1 and 2, it is characterized in that: the inboard and outside is respectively equipped with described washer (4) and described syringe (7) corresponding to the bottom and the top of magnetic product mine-carrying groove (4) at separator plate (9).

6. continuous discrete type rare earth permanent magnet high gradient magnetic separator according to claim 1 and 2 is characterized in that: be provided with described ore feeder at separator plate (9) inside front, and described ore feeder is damp type ore feeder (3).

7. continuous discrete type rare earth permanent magnet high gradient magnetic separator according to claim 1 and 2 is characterized in that: by adjustable continuously in 0～20 rev/min of separator plate (9) running speed of variable frequency regulating speed control.

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