JPS6362261B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recovery device for recovering and reusing magnetic materials such as iron powder contained in dust generated in factories and the like.

Dust generated in factories, especially steel mills, contains
Since it contains a large amount of magnetic substances such as iron powder, if we can recover magnetic substances such as iron powder from the dust,
This can be reused. By the way, conventionally
To recover magnetic materials from dust, the dust was passed through a filter and captured without distinguishing between non-magnetic and magnetic materials, so after collection, the captured materials had to be separated into non-magnetic materials and magnetic materials again. Not only that, but the process of collecting magnetic materials such as iron powder is complicated and the work efficiency is extremely low. Furthermore, recently, a magnetic sorting method has been proposed as a method using magnetism, but the biggest problem with the magnetic sorting method is that when magnetic particles are magnetized by magnetic induction and attracted to each other, the magnetic particles are attracted to each other. The problem is that non-magnetic particles are trapped in between, resulting in poor separation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic material recovery device that solves the above-mentioned problems.

The present invention has a sorting chamber in which the sorted magnetic material is placed in the middle of the duct through which dust is sent, and a plurality of weir plates fixed to the bottom of the duct and tilted with respect to the fluid flow direction, and furthermore, the duct has a plurality of weir plates that are fixed to the bottom of the duct and are inclined with respect to the fluid flow direction. It is characterized by consisting of a belt having rotatable magnets.

In the present invention, the magnetic material in the inflowing dust gradually falls to the bottom of the duct under the influence of the external magnetic field,
At the same time, the weir slows down the movement. Another feature is that the external magnet rotates slowly and falls, and the magnetic bodies near the weir move along the weir and finally gather in the sorting chamber. Another major feature is that since turbulence is generated near the weir, non-magnetic material adhering to the magnetic material attracted by the falling magnet can be gradually removed.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, it has a plurality of non-magnetic weir plates 3 fixed to an inner wall 1 facing the duct 1.
As seen in the plan view of FIG. 2, this weir plate 3 is characterized in that it is arranged in an inclined state with respect to the fluid flow direction 9. As shown in FIG. 1, it is desirable that the tips of the plurality of weirs extend near the entrance of the sorting chamber 8 and even into the interior thereof. Another feature of such a duct is that it has a rotatable belt on the outer wall of the duct and close to the weir plate, and that the magnet fixed to the belt is in close contact with the outer wall of the duct. It is a characteristic of The configuration of the apparatus of the present invention is as described above, and the magnetic material that has entered the sorting chamber can be taken out to the outside through the valve 10.

In the embodiment of the invention, the belt 4 is first rotated by the gear 6. Therefore, the magnet 5 on the belt rotates in close contact with the outer wall 1 of the duct. The outlet valve of the sorting chamber 8 is in a closed state. In this state, a flow 9 of dust containing a mixture of magnetic and non-magnetic materials enters. When the dust reaches the area covered by the magnetic force of the magnet, the magnetic material in the dust is attracted by the magnetic force,
Gradually they move in the direction of the magnet, and eventually they collide with multiple weirs 3 or are attracted by the magnets, and gather near the weirs. Since the magnet 5 is moving slowly, the magnetic material attracted by the magnet 5 moves along the magnet 5 and the weir 3, and finally falls into the sorting chamber 8 and collects therein. At the same time, turbulent flow is occurring near the weir 3, so the turbulent flow also acts on the magnetic material attracted by the magnet 5, and the non-magnetic material that has been partially incorporated into the magnetic material becomes the magnetic material due to the turbulent flow. As a result, the magnetic material becomes larger. This is because the magnetic material is attracted to the magnet, and at the same time the magnet moves, so the magnetic material is in a state of constant movement while being attracted, and when turbulence is added to this state, the non-magnetic material taken into the attracted magnetic material This has resulted in him pushing his body out. According to the recovery device of this structure, most of the conventional problems can be solved, and moreover, it has the advantage of being able to be used continuously.

Furthermore, although the magnet shown in Figure 1 has a great effect as a single magnet, it is necessary to use a third magnet to make the magnetic force even stronger.
The structure shown in the figure is excellent. That is, the outer walls 12, 12' of the duct have magnets 13, 13' on both sides, and the magnet 13' on the outer wall 12' side, which has the weir, has a pole piece 1 made of, for example, soft iron.
4, the pole piece 14 faces the magnet 13 and is in close contact with the outer wall 12'. According to this, the magnetic flux of the magnet 13' is
The tip of the magnet 4 enters the magnet 13 to form a magnetic circuit. At that time, the magnetic flux from 13' is converged by passing through the pole piece 14, so the gradient of the magnetic flux at the tip of the pole piece 14 becomes large, and as a result, the attraction force of the magnetic body becomes larger. . In addition, in FIG. 3, the magnet 13 is attached to the duct outer wall 12.
A magnet 13' to which the pole piece 14 is fixed is moved close to the duct outer wall 12'.
The magnet 13' is used in place of the magnet 5 fixed on the rotatable belt shown in FIG. 1, so that it rotates as the gear 6 rotates.

As described above, the present invention uses magnetic force and a weir to move only magnetic materials such as iron powder from dust gases from steel mills, and turbulent flow generated by the weir to sort and collect them. The running cost required for this process is small, and the recovery device has a simple structure and can be operated continuously.

[Brief explanation of drawings]

1 and 2 are a side view and a top view of a recovery device according to one embodiment of the present invention, and FIG. 3 is a partial side view of another embodiment. 1... Duct outer wall, 2... Duct inner wall, 3...
Weir plate, 4...belt, 5...magnet, 6...gear,
7... Sorting room entrance, 8... Sorting room, 9... Dust flow, 10... Valve, 11... Magnetic material flow,
12, 12'...Duct, 13, 13'...Magnet,
14...Ferromagnetic pole piece, 15...Magnetic field lines.

Claims (1)

[Claims] 1. In a duct having a sorting chamber in the middle into which magnetic components are magnetically sorted, on the inner wall surface of the duct,
A plurality of non-magnetic weir plates that are inclined with respect to the fluid flow direction and extend to the entrance and/or inside of the sorting chamber, and a plurality of non-magnetic weir plates that are attached to a rotatable non-magnetic belt. 1. A magnetic material collection device comprising a magnet, the magnet surface being provided close to the outer wall of the duct at the entrance of the sorting chamber and/or at a position reaching the interior thereof. 2. The magnetic material collection device according to claim 1, wherein the magnet is a magnet sandwiched from both sides of the duct, and the magnet on the weir plate side has a ferromagnetic material in close contact with the magnet.