JPS6241773B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a magnetic separation device that effectively removes residual magnetic substances that cause blockage of the matrix of the magnetic separation device by jetting pressurized water. [Prior Art] Conventionally, there are two types of mobile magnetic separators that have been put into practical use for processing large amounts of slurry: a rotary motion separator shown in FIG. 1 and a reciprocating motion separator shown in FIG. There are two types. In each case, a container 14 containing a matrix 13 having a structure filled with ferromagnetic metal wool or a structure laminated with ferromagnetic metal wire mesh, expanded metal, punched methane, etc. is placed in the gap between opposing magnetic poles 12 of a magnetic circuit (yoke) 11. is arranged. In the rotary motion type shown in FIG. 1, the container 14 rotates in the circumferential direction 15,
In the reciprocating type shown in FIG. 2, the container 14 is moved in the horizontal direction 26.
make a reciprocating motion. On the other hand, the stock solution 18 is gravity-fed from the liquid supply port 17 to the matrix 13 in the magnetic field space, and after the magnetic particles 19 in the stock solution 18 are removed, the processing solution 25 containing non-magnetic particles 24 is converted into treated water. It flows into the trough 20. The magnetic particles 19 captured in the matrix 13 are washed out by pressure water 22 sprayed vertically downward from a washing nozzle 21 provided outside the magnetic field space, and the washed liquid 16 is transferred to a washed liquid trough 23. Inflow. Residual magnetized matter that cannot be washed out with the pressure water 22 accumulates inside the matrix 13, but if the accumulation causes a blockage in the matrix 13, the flow of the raw solution 18 is immediately stopped, the operation is stopped, and the matrix 13 is placed in a container. The matrix was removed from No. 14, replaced with a new matrix, and operation resumed. [Problems with the prior art] As described above, in the conventional mobile magnetic separation device, pressurized water is sprayed vertically downward from the cleaning nozzle provided outside the magnetic field space onto the top surface of the matrix, and the interior of the matrix is The magnetized magnetic particles are removed, but when the pressure water passes through the matrix, a significant pressure loss occurs, so the cleaning power of the pressure water is very weak below the matrix. Become. For this reason,
Magnetic particles magnetized near the top surface of the matrix are removed from the matrix by the strong cleaning power of the pressure water, but below the matrix, the cleaning power of the pressure water is weakened, so that residual magnetization is reduced. The drawback was that magnetic particles that were magnetized by the action were difficult to remove. Next, problems with matrix cleaning will be explained using the matrices shown in FIGS. 3 to 5 as examples. FIG. 3 shows a matrix in which expanded metals 27 made of ferromagnetic metal are laminated in a direction perpendicular to the direction 29 of applying a magnetic field and parallel to the direction 28 of inflow of the stock solution and cleaning water. FIG. 4 shows a plan view thereof, and FIG. 5 shows a sectional view thereof. In FIGS. 4 and 5, the side 30 facing the washing water inflow direction 28
Magnetic particles that are magnetized are easily washed away, but
The magnetic particles magnetized on the side 31 that does not face the washing water inflow direction 28 are difficult to be washed away because they exist in a so-called dead zone where the flow of the washing water stagnates. As a result, blockage phenomena due to the magnetic particles remaining inside the matrix without being removed by the washing water often occur, and the stock solution flowing into the matrix overflows, or the magnetic particles in the stock solution This caused a phenomenon in which the collection efficiency decreased and the matrix had to be replaced very frequently, which was a major problem in magnetic separation devices. [Object of the Invention] The object of the present invention is to eliminate such conventional drawbacks, and to clean the matrix by jetting pressure water from two directions, the undiluted solution inflow side and the undiluted solution outflow side, to eliminate matrix occlusion. An object of the present invention is to provide a magnetic separation device that can effectively remove residual magnetic substances that cause . [Structure of the Invention] The present invention includes a matrix made of ferromagnetic metal, a magnet device arranged to apply a magnetic field to the matrix, and a magnet device that continuously and repeatedly applies the matrix inside and outside the magnetic field space of the magnet device. In a magnetic separation device comprising a mechanism for causing reciprocating or rotational movement, and a nozzle for cleaning the matrix outside the magnetic field space, the nozzle is arranged on an undiluted solution inflow side and an undiluted solution outflow side with respect to the matrix, respectively. This is a magnetic separation device characterized by being installed toward the [Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 6 shows an embodiment in which the present invention is applied to a rotary motion type magnetic separation device. The conventional rotary motion type magnetic separation device shown in Fig. 1 is a matrix 1
However, in the present invention, a backwash nozzle 32 that can wash the matrix 13 from the vertically downward side is further provided. Magnetic particles 1 magnetically attached to matrix 13
Most of the water 9 is removed by the pressure water 33 that is ejected upward from directly below the matrix, and immediately after that, the pressure water 22 is ejected downward from the vertically upward direction.
completely removed by In Figure 6, container 1
4, the backwash nozzle 32 and the cleaning nozzle 21 are arranged sequentially along the moving direction 15 of the container 14, but the cleaning nozzle 21 is arranged in the reverse order, that is, along the moving direction 15 of the container
Even if the backwash nozzle 32 is arranged in this order, the same effect of washing and removing the magnetic particles 19 magnetically attached to the matrix 13 can be expected. FIGS. 7 and 8 show an embodiment in which the present invention is applied to a reciprocating type magnetic separation device. FIG. 7 is a plan view, and FIG. 8 is a cross-sectional view taken from FIG. 7. The container 14 is driven by a combination of a motor 34 and a chain 35. The conventional reciprocating magnetic separator shown in FIG. 2 is equipped with a cleaning nozzle 21 directly above the matrix 13, but in the present invention, a backwashing nozzle 32 that can clean the matrix 13 from vertically below is added. This is what I did. The magnetic particles magnetically attached to the matrix 13 are
Most of it is removed by the pressure water 33 jetted from the vertically downward direction upwards from the backwashing nozzle 32, and immediately after that, the pressure water 22 jetted vertically downwardly from the cleaning nozzle 21 removes the water. completely removed. In FIG. 7, the backwash nozzle 32 and the cleaning nozzle 21 are placed away from the magnetic pole 12, but
Even if the cleaning nozzle 21 and the backwashing nozzle 32 are arranged in the reverse order, that is, in the order away from the magnetic pole, the cleaning and removal effect of the magnetic particles 19 magnetically attached to the matrix 13 can be expected to be synchronous. [Effects of the Invention] The following experiments were conducted regarding the throughput of the apparatus of the present invention (as shown in FIG. 7) and the conventional magnetic separation apparatus (as shown in FIG. 2). First, a polishing slurry discharged from a cathode ray tube glass manufacturing line as a stock solution was treated under the conditions shown in Table 1. The purpose of this treatment is to remove iron from the slurry and convert the sludge in the slurry into a raw material for glass. The matrix is arranged in the flow direction 28 of the stock solution as shown in FIG.
A stack of 45 expanded metal plates with a mesh shape with an overlength of 180 mm along the length was used, and the total layer thickness was 90 mm. In addition, the amount of washing water is 0.5ton/for both the present invention device and the conventional magnetic separation device.
hr.

【table】

[Table] Table 1 shows the equipment specifications and processing conditions. The second graph shows the changes over time in the amount of residual magnetic material deposited per unit volume of the matrix and the collection efficiency of iron powder particles in the device of the present invention and the conventional device during long-term running.
Shown in the table. According to Table 2, when glass abrasive slurry is processed using the present invention and the conventional mobile magnetic separator under the conditions shown in Table 1, the present invention shows that the matrix remains even after 40 days of continuous operation. There was almost no accumulation of magnetic substances, and there was no decrease in the collection efficiency of iron powder particles, whereas with conventional magnetic separation equipment,
The matrix gradually became clogged due to the accumulation of residual magnetic material, and after 40 days, the stock solution overflowed from the matrix and it became necessary to replace it with a new matrix. Furthermore, in the conventional magnetic separation device, the matrix gradually became clogged and the efficiency of collecting iron powder particles gradually decreased. As described in detail above, according to the present invention, it is possible to almost completely prevent the accumulation of residual magnetic particles that cause matrix clogging, and to prevent the reduction in iron powder particle collection efficiency caused by the clogging. Therefore, it is possible to run for a long period of time, and the frequency of replacing the matrix can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional rotary motion magnetic separator, FIG. 2 is a perspective view of a reciprocating motion magnetic separator,
Fig. 3 is a perspective view of a matrix with a structure in which expanded metals are laminated, Fig. 4 is a plan view showing the mesh shape of the expanded metal, and Fig. 5 is the − of Fig. 4.
6 is a perspective view showing the first embodiment of the present invention, FIG. 7 is a front view showing the second embodiment of the present invention, and FIG. 8 is a sectional view taken along the line -- of FIG. 7. It is. 11... Yoke, 12... Opposing magnetic pole, 13...
Matrix, 14... Container, 15... Rotational movement direction, 16... Washed liquid, 17... Liquid supply trough, 1
8... Raw solution, 19... Magnetic particles, 20... Treated liquid trough, 21... Washing nozzle, 22... Pressure water, 23... Washed liquid trough, 24... Non-magnetic particles, 25... ... Treated liquid, 26 ... Direction of reciprocating movement, 27 ... Expanded metal, 28 ... Inflow direction of raw solution and washing water, 29 ... Direction of magnetic field application, 30 ... Side opposite to washing water inflow direction 28, 31... Side not facing the washing water inflow direction 28, 32... Backwash nozzle, 33... Pressure water, 3
4...Motor, 35...Chain.

Claims (1)

[Claims] 1 A matrix made of ferromagnetic metal, a magnet device arranged to apply a magnetic field to the matrix, and a continuous and repetitive reciprocating or rotational movement of the matrix inside and outside the magnetic field space of the magnet device. In the magnetic separation device, the nozzles are installed on an undiluted solution inflow side and an undiluted solution outflow side facing the matrix, respectively, with respect to the matrix. A magnetic separation device characterized by: