CN201308893Y - Magnetic iron-removal vibration sieve - Google Patents

Abstract

The utility model discloses a vibrating screen for magnetic iron removal, which comprises a frame, a vibrating motor installed on the frame, a screen box installed on the vibrating motor, and a screen box arranged between the frame and the screen box for supporting the screen box. Springs and ribs, the bottom of the screen box forms a conical warehouse bottom, the screen box includes a machine cover, an upper frame and a lower frame, a material inlet is provided on the machine cover, and a discharge port is provided on the lower frame. A screen for filtering is set between the upper frame and the lower frame, and a magnetic iron removal device is set between the screen and the bottom of the conical bin. The magnetic vibrating sieve for iron removal of the utility model integrates the functions of the vibrating sieve and iron removal, which can not only effectively separate positive electrode materials for lithium-ion batteries with different particle sizes, but also remove trace iron filings in the materials.

Description

Magnetic Vibrating Screen for Iron Removal

technical field

The utility model relates to a vibrating sieve, in particular to a magnetic iron-removing vibrating sieve for sieving lithium-ion battery cathode materials and removing trace iron filings therein.

Background technique

In the production process of lithium-ion battery cathode materials such as lithium cobaltate, lithium manganate, ternary materials, and lithium nickel-cobaltate materials, trace amounts (mass percentage less than 0.1%) of Iron filings are mixed in the material. A small amount of iron filings will form a micro-battery in the lithium-ion battery, reduce the specific capacity of the lithium-ion battery, and seriously pierce the lithium-ion battery diaphragm, and even cause the lithium-ion battery to explode.

Since the amount of iron filings contained in the positive electrode powder is very small, and it is included in the positive electrode powder in the form of fine particles, the efficiency of the iron remover is not high when using a permanent magnet to remove iron. The magnetic force obtained by the shavings is not enough to get rid of the shackles of the positive powder and reach the magnetic bar and be adsorbed. Using a large electromagnet iron remover can obtain enough magnetic force, but the power consumption is huge and the energy consumption is high, so it is not suitable for removing trace iron filings.

In the sieving process of the positive electrode powder of lithium-ion batteries, due to the dispersion effect of the screen, the positive electrode powder can be better dispersed during the falling process between the screen and the bottom of the vibrating screen, reducing the powder Binding force between particles; due to the installation of a permanent magnet iron removal device at the conical bottom of the screen, it can effectively remove trace iron filings in the positive electrode powder while sieving.

Contents of the invention

The technical problem to be solved by the utility model is to provide a special magnetic iron removal vibrating screen for lithium ion battery positive electrode materials, which can screen lithium battery positive electrode powder and remove trace iron filings in the material.

In order to solve the above problems, the magnetic iron removal vibrating screen of the utility model includes:

A magnetic vibrating screen for iron removal, comprising a frame, a vibrating motor mounted on the frame, a screen box mounted on the vibrating motor, and springs and ribs arranged between the frame and the screen box for supporting the screen box, The bottom of the screen box forms a cone-shaped bottom. The screen box includes a machine cover, an upper frame and a lower frame. A screen for filtering is set between them, and a magnetic iron removal device is set between the screen and the bottom of the conical bin.

The magnetic iron removal device includes a spacer set between the screen and the bottom of the conical silo, and a permanent magnet set between the spacer and the bottom of the conical silo, the spacer Made of non-magnetic material, the shape of the bottom of the spacer fits the shape of the bottom of the bin.

The spacer also has a side wall adapted to the shape of the inner side wall of the lower frame, and an opening is arranged on the side wall of the spacer at a position corresponding to the outlet, and the circumferential surface of the upper end of the side wall of the spacer is along the A flange is formed extending radially outward, and the flange is arranged between the flanges of the upper frame and the lower frame and is fixedly connected through the flange.

The longitudinal section of the flange is U-shaped, which surrounds the flanges of the upper and lower spacers and the flanges of the spacer, and the joints at both ends of the flange are fixedly connected by a fixed structure.

The non-magnetic material is made of aluminum, aluminum alloy or plastic.

The permanent magnets are a plurality of annular permanent magnet coils with different diameters arranged at intervals, and the annular permanent magnet coils are embedded and installed on the bottom of the conical bin.

Compared with the existing vibrating screen, the magnetic vibrating screen for iron removal of the utility model integrates the functions of screening and iron removal, and can be used for lithium-ion battery cathode materials such as: lithium cobaltate, lithium manganate, ternary materials or nickel The production and preparation process of cobalt lithium material. When used, it can not only effectively screen out the lithium-ion battery positive electrode material with the required particle size, but also effectively remove the iron filings in it, thus ensuring the quality of the product.

In addition, the machine has the advantages of simple structure, convenient operation, strong practicability, and low manufacturing cost.

Description of drawings

Fig. 1 is the structural representation of magnetic force iron removal vibrating screen of the present utility model;

Fig. 2 is the side view of the iron removal device in the magnetic force iron removal vibrating screen of the present utility model;

Fig. 3 is the top view of the bottom of the warehouse embedded with the annular permanent magnet ring;

Fig. 4 is a schematic diagram of the flange connection between the spacer and the upper and lower frames of the vibrating screen in the magnetic force removal vibrating screen of the present invention;

Fig. 5 is a top view of the flange connection structure in the magnetic iron removal vibrating screen of the present invention.

Detailed ways

The structure of the iron-removing vibrating screen of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 2, the iron removal vibrating screen of the present utility model includes: 8 frames, a vibrating motor 6 installed on the frame 8, a screen box installed on the vibrating motor 6, and a screen box installed on the frame 8 and The springs 9 and the ribs 10 are used to support the screen boxes between the screen boxes, and the bottom of the screen boxes forms a conical warehouse bottom 20 . Wherein, the sieve box comprises a machine cover 14, an upper frame 13 and a lower frame 12, the machine cover 14 is provided with a feed inlet 1, the lower frame 12 is provided with a discharge port 11, and between the upper frame 13 and the lower frame 12 A screen 2 for filtering is provided, and a magnetic iron removal device is provided between the screen 2 and the conical bin bottom 20 . The magnetic iron removal device includes: a spacer 3 arranged between the screen 2 and the conical bin bottom 20 to act as a barrier, and a permanent magnet 4 arranged between the spacer 3 and the conical bin bottom 20, Spacer 3 is arranged at the bottom 20 adjacent to the conical warehouse, and spacer 3 is made of non-magnetic material, and the shape of its bottom adapts to the shape at the bottom of the warehouse, that is, the shape of spacer 3 is also conical. In this embodiment, the screen box of the vibrating screen is cylindrical, the bottom 20 of the bin is conical, and the spacer 3 is also conical. Of course, the bin bottom 20 and the spacer 3 can also be designed into other tapered shapes as required.

The permanent magnet 4 is a plurality of annular permanent magnet coils with different diameters arranged at intervals, and the annular permanent magnet coils are embedded and installed on the conical chamber bottom 20 . The spacer 3 can be made of non-magnetic materials such as aluminum, aluminum alloy or plastic. In this embodiment, the spacer 3 is made of 6063 aluminum alloy, which can reduce the loss when the magnetic force passes through.

In addition, as shown in Fig. 4 and Fig. 5, in order to ensure airtightness and easy disassembly and assembly, the tapered spacer 3 also has a cylindrical side wall 21 (see Fig. 1), and the size of the side wall 21 is the same as that of the side of the lower frame 12. The inner side of the wall is adapted, and an opening (not shown) is provided at a position corresponding to the discharge port 11 on the side wall of the spacer 3, so as to discharge the material. The circumferential surface of the upper end of the side wall of the spacer 3 extends radially outwards to form a flange 17. The flange 17 is arranged between the flanges 16, 18 of the upper frame and the lower frame, and is fixedly connected by a flange 15 for easy disassembly. . The longitudinal section of the flange 15 is U-shaped, which surrounds the flanges 16, 18 of the upper and lower spacers and the flange 17 of the spacer 3, and the joints at the two ends of the flange 15 are fixedly connected by a fixed structure. In this embodiment, the fixing structure includes lugs arranged near the two connecting ends of the flange 15 and bolts for fixing. Specifically, two parallel lugs 22 are set near a connection end of the flange 15, and are respectively formed with through holes for installing bolts 24 on the two lugs 22, where the bolts 24 are installed vertically; Near the other connecting end of 15 is provided with a vertical lug 23, on the lug 23 is also formed with through holes for installing bolts 19, where the bolts 19 are installed horizontally. On the horizontally installed bolt 19, a through hole is formed to facilitate the penetration of the vertical bolt. . Through this structure, the two connecting ends of the flange 15 are fixed together.

The working principle of the magnetic iron removal vibrating screen of the present invention will be described below.

As shown in Figure 1, the magnetic iron removal vibrating screen is driven by a vibrating motor 6 installed in a frame 8 through a spring 9 to sieve materials. The vibration motor 6 includes an upper eccentric plate 5 and a lower eccentric plate 7; the screen box is supported by a rib plate 10. The lithium-ion battery positive electrode material containing iron filings enters the upper frame 13 from the feed port 1, enters the lower frame 12 through the screening of the screen 2 and falls on the spacer 3, and the iron filings are adsorbed by the permanent magnet ring 4 on the spacer 3 Above, the battery material is discharged from the lower frame 12 through the discharge port 11 . After stopping the machine, open the flange 15, remove the spacer 3, and then clean up the iron filings adsorbed on the spacer 3, and reinstall the spacer 3 after cleaning to continue to use.

Since the permanent magnet is embedded and installed in the bottom of the bin, the spacer 3 plays the role of blocking the permanent magnet and iron filings. During the sieving process, the powder is attracted by the magnetic force during the sieving and falling process, thereby avoiding being mixed in The phenomenon that the positive electrode powder cannot move improves the efficiency of iron removal.

Claims (6)

1. magnetic force deironing vibratory sieve, comprise frame, rack-mounted vibrating motor, be installed in the screen box on the vibrating motor and be arranged on frame and screen box between be used to support the spring and the floor of screen box, the bottom of screen box forms at the bottom of the taper storehouse, described screen box comprises cover, upper ledge and lower frame, cover is provided with charging aperture, lower frame is provided with discharging opening, between upper ledge and lower frame, be provided with the screen cloth that filters usefulness, it is characterized in that: between at the bottom of screen cloth and the taper storehouse, be provided with the magnetic force deironing apparatus.

2. magnetic force deironing vibratory sieve according to claim 1, it is characterized in that: described magnetic force deironing apparatus comprise be arranged at the bottom of described screen cloth and the taper storehouse between, the spacer that takes blocking effect and be arranged on spacer and the taper storehouse at the bottom of between permanent magnet, described spacer is made by nonmagnetic substance, and the shape of spacer bottom and the shape at the bottom of the storehouse adapt.

3. magnetic force deironing vibratory sieve according to claim 2, it is characterized in that: described spacer also has the sidewall that the shape with the lower frame inside sidewalls adapts, on the spacer sidewall, with the corresponding position of discharging opening be provided with perforate, the periphery of spacer sidewall upper extends radially outward and is formed with flange, described flange is arranged between the flange of upper ledge and lower frame, and fixedly connected by flange.

4. magnetic force deironing vibratory sieve according to claim 3, it is characterized in that: the longitudinal cross-section of described flange is a U-shaped, the flange of spacer and the flange of spacer about surrounding, the joint at flange two ends is fixedly connected by fixed structure.

5. magnetic force deironing vibratory sieve according to claim 2 is characterized in that: described nonmagnetic substance is aluminium, aluminium alloy or plastics.

6. magnetic force deironing vibratory sieve according to claim 2 is characterized in that: described permanent magnet is the annular permanent magnet iron ring with different-diameter that a plurality of intervals are provided with, on described annular permanent magnet iron ring embeds and is installed at the bottom of the taper storehouse.

Images