JPS60212253A - Magnetic separator for iron pieces mixed in magnetite ore - Google Patents

Abstract

PURPOSE:To continuously remove ferromagnetic iron pieces mixed in a stock magnetite ore, by horizontally arranging electromagnets for intensive excitation to a position above a stock magnetite ore conveyor while horizontally arranging electromagnets for weak excitation to the leading part in the drive direction of a magnetic separation belt in adjacent relationship. CONSTITUTION:A magnetic separation belt 13 is continuously driven to the direction shown by the arrow X in such a state that a stock magnetite ore conveyor 10 and a recovered iron ore conveyor 11 are continuously operated in a predetermined direction. Further, a current is supplied to the exciting coils 152, 162 of electromagnets 15 for intensive excitation and electromagnets 16 for weak excitation to respectively excite yokes 151, 161. In this state, a stock material 30 being a mixture of a magnetite core 4 and ferromagnetic iron pieces 3 on the stock magnetite ore conveyor 10 is continuously separated into the magnetite ore 4 and the ferromagnetic iron pieces 3 and the former is separated and recovered onto the recovered iron ore conveyor 11 while the latter is separated and recovered in a ferromagnetic substance recovery hopper 12.

Description

[Detailed description of the invention] This invention relates to a magnetic separator for removing magnetic iron pieces.

Conventionally, as a magnetic separator for removing iron pieces mixed in raw material magnetic ore, for example, as shown in FIG. By arranging the piezoelectric magnet 1 above the conveyor 1 and strongly exciting the electromagnet 1 in the same figure, both the iron pieces 3 and the ore 40 as raw materials are attracted, and then the electromagnetic mole rail 3 is used to attract the intermediate mounting table 6. Move it above (
In Figure I), all the magnetic objects 3.41 are once released on the intermediate table 6, and then the electromagnet 2 is weakly excited to attract only the iron piece 3 from the intermediate table 6 again, and then! The magnet is moved to above the ferromagnetic material collection hopper 7 by the mole rail 3), the iron piece 3 is released and dropped into the hole puff, and after being collected, the electromagnetic material is moved again to the intermediate stand by the mole rail j. 6, the electromagnet 2 is strongly excited and magnetized to the ore, and the mole rail 3 returns the electromagnet to the upper part of the original raw material conveyor l, and the ore Qk is released and falls into the raw material conveyor l. Equipment that performs such operations is employed. In addition,
Figure 1 shows each process of the conventional equipment shown in Figure 1 above.
It is a cycle diagram shown by comparing the weak excitation MY and reverse excitation MR of the electromagnetic 510 strongly excited M13, and the adsorption A and release R of iron ore J and iron piece q, and in the figure IZ H
1 and m' respectively correspond to I, If and m in FIG. It is something.

As can be seen from Figures 1 and 1, with such a conventional magnetic separator, it is possible to automatically wash and remove iron without stopping the raw material conveyor. This method has a serious drawback in that continuous magnetic separation cannot be carried out because only a portion of the raw materials j and lI transported above can be taken out.

Therefore, in view of the above-mentioned serious drawbacks in the conventional magnetic separator having such a configuration, the present invention has been developed to eliminate such drawbacks and prevent the mixing of raw material magnetite ore. The objective is to obtain a new magnetic separator that can continuously remove ferromagnetic iron pieces.

In order to achieve this object, the present invention has been developed in such a way that, when the apparent magnetic susceptibility of mixed ferromagnetic iron pieces in the raw material magnetite ore to be magnetically separated is 100, the apparent magnetic susceptibility of the magnetite ore is 60.
~70, and have a certain width in the direction perpendicular to the running direction and at intervals above the raw material magnetite ore conveyor, which is arranged horizontally so as to run continuously. An endless magnetic separation belt is arranged so that its lower running side can be continuously driven horizontally, and in the space formed between the upper and lower running sides of the σ1° magnetic separation belt,
An electromagnet for strong excitation is arranged horizontally above the raw material magnetic ore conveyor, and an electromagnet for weak excitation is arranged horizontally adjacent to it in the driving direction of the magnetic separation belt, and below the conveyor for recovered iron ore. is arranged adjacent to the raw material magnetic ore conveyor, and furthermore, a ferromagnetic material recovery hopper is arranged adjacent to the weakly excited electromagnet and below the magnetic separation belt outside the magnetic field. .

Hereinafter, the present invention will be explained based on FIG. 1 of the accompanying drawings showing an embodiment thereof.

As shown in the figure, in this embodiment, the raw material magnet ore conveyor lθ and the first recovered iron ore conveyor l/ are arranged horizontally adjacent to each other in parallel and spaced from each other so as to run continuously. Line up.

Recovered iron ore conveyor I/raw material magnetite ore conveyor IO
On the opposite side, a ferromagnetic material recovery hopper l- is fixedly disposed adjacent to and spaced apart from the recovered iron ore conveyor l.

Also, these raw materials magnetite ore conveyor to.

Conveyor l for recovered iron ore / and hopper l for recovering ferromagnetic materials
- Above these conveyors, an endless magnetic separation belt 13 having a certain width is arranged at a distance from their upper sides in a direction perpendicular to the running direction of these conveyors. A pair of pulleys 141°/4 are arranged inside a space formed between the upper and lower running sides 138 and /3° of the magnetic separation belt 13, facing their longitudinal ends.
．． Wrap around the circumference of the horizontal lower running side/3. can be continuously driven in the direction of the arrow X, that is, from the side of the raw magnetite ore conveyor 10 toward the ferromagnetic material recovery hopper l-. In this case, magnetic selection belt/
3 protrudes outward beyond the upper side of the raw material magnetite ore conveyor 10, while reaching almost the center of its upper opening on the side of the ferromagnetic material recovery hopper l-. shall be.

In addition, the upper and lower running sides of the magnetic separation belt 13 /38°/J,
In the space formed between the pulleys IIt and both pulleys IIt, llff1, an electromagnet 15 for strong excitation and an electromagnet 15 for weak excitation are placed above the raw material magnetic ore conveyor /Q and the recovered iron ore conveyor //. Although the electromagnet 16 for use is arranged,
Excitation coils tS and /A are installed inside each yoke /11 and /Affi, respectively, and the magnetic poles of each electromagnet /j% /A are connected to the raw material magnetite conveyor 10 and the recovery magnet, respectively. 1,000 rows are being lined up for iron ore conveyor/1. In addition, the space between each magnetic pole is a non-magnetic mortarboard/? ,,/? , respectively.
It's blocked. In the illustrated embodiment, the yoke /j1. of both vehicle magnets /&, /l,. /&i are shown as being integrated.

Furthermore, for example, a tension wheel ig is installed on the upper surface of the yoke ljl of the strong excitation electromagnet /j, and the magnetic separation belt 1
3% constant tension is applied at all times.

Seven embodiments of the present invention have one or more configurations, and seventy operations will be explained next.

First, raw material magnetite conveyor IQ and recovered iron ore conveyor //11 are operated continuously in a predetermined direction, and raw material i
The iron ore conveyor IQ transports the raw material 30 made of magnetite ore containing the ferromagnetic iron pieces 3, and at the same time magnetic separation is carried out by driving at least one of the pulleys tu, ia* via an external power. The belt 13 is continuously driven in the direction of the arrow X under constant tension via the tension wheel /15, and the strong excitation electromagnet /j and the weak excitation electromagnet lb installed inside the belt 13 are driven continuously under constant tension. Each excitation coil/! r, , /At are energized, and the yokes 1g□, 1. tt are each excited.

When one raw material 30 is conveyed to the position of the magnetic separation belt 13 by the raw material magnet ore conveyor 10K under these conditions of each member, a strong excitation electromagnet l! By preselecting the strength of the magnetic field generated by the magnetite to be sufficient to attract both the magnetite ore and the ferromagnetic iron piece 30, the magnetite ore on the raw magnetite conveyor io is Both the ferromagnetic iron piece 3 and the strong excitation electromagnet l! inside the magnetic selection belt IO! Due to the action of the magnetic field generated by the magnetic separator belt 13
is attracted to the lower surface of the lower running side /J of
3 is transported to the lower part of the weak excitation electromagnet L. However, in this case, this weak excitation electromagnet/AK
Therefore, the strength of the magnetic field generated should be selected in advance so that it is insufficient to attract the magnetite ore but is sufficient to attract the ferromagnetic iron piece 3. , when you come to this weak excitation electromagnet l, the magnetite ore q
is released from the blowing surface of the magnetic separation belt 13 and falls onto the recovered iron ore conveyor ll which is running continuously below it, and is carried forward by this conveyor. Due to the adsorption pressure of the 1-weak excitation electromagnet lB, it is still attracted to the lower surface of the 13° running side of the lower part of the magnetic separation belt 13, and is placed above the ferromagnetic material recovery hopper l- together with the magnetic separation belt 13. carried to the position. However, at this point, the influence of the magnetic field of the weak excitation electromagnet /A is not substantially reached, so the ferromagnetic iron piece 3 is used as a magnetic selection bell) / ? It is released from the surface of the ferromagnetic material, falls into the ferromagnetic material recovery hopper, and is collected.

Thereafter, the magnetic separation belt 13 returns again to the position γ above the raw material magnetite ore conveyor lθ, and the above operation is repeated, so that magnetic separation is carried out continuously.

The apparatus of the present invention continuously converts the raw material 30, which is a mixture of magnetite ore q and ferromagnetic iron piece 3, on the raw material magnetite ore conveyor lθ into magnetite ore g and ferromagnetic iron piece 3. The former is placed on a conveyor for recovering iron ore, and the latter is placed in a hopper for recovering ferromagnetic materials.
It will be separated and collected.

Although the present invention is thus effective for separating the ferromagnetic iron pieces contained therein from the raw material magnetite ore, the present invention simply It is clear that the present invention is not limited to use, and that 1:1 or more types of magnetic plates can be widely applied to sorting different magnetic objects.

As described above, the present invention completely eliminates the serious drawbacks of conventional methods, and, for example, removes ferromagnetic iron pieces mixed in raw material magnetite ore automatically and with high efficiency. This is achieved by a magnetic separator that makes this possible.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram showing an example of a conventional magnetic separator for removing ferromagnetic iron pieces mixed in raw material magnetite ore, together with its operation; Fig. 2 is an explanatory diagram of its operation cycle; The figure is a schematic representation of an embodiment of the invention. 10... Raw material conveyor; ll... Recovered iron ore conveyor; l... Hopper for recovering ferromagnetic materials; 13... Magnetic separation bell); /4I... Pulley; ls... For strong excitation Electromagnet; /j, ... same yoke; is, ... same coil; /6
... Weak excitation electromagnet; 161... Same yoke; 16.
... Same coil; 17... Non-magnetic holding plate; lza... Tension wheel. Patent applicant: Mitsubishi Steel Magnetic Materials Co., Ltd. Figure 2 (I[[l (1”) (I[”)

Claims (1)

[Scope of Claims] l A raw material conveyor is arranged so as to be able to run horizontally, for example, and an endless magnetic sorting belt is spaced above it and has a lower side having a certain length horizontally in the running direction of the raw material conveyor. A strong excitation electromagnet is arranged above the raw material conveyor in the space formed between the upper and lower sides of the endless magnetic separation belt, and the lower side of the endless magnetic separation belt An electromagnet for weak excitation is placed behind the electromagnet for strong excitation in the driving direction, and a conveyor for recovered iron ore is placed at the bottom of the bottom side of the endless magnetic separation belt at the position of the electromagnet for weak excitation. A magnetic separator for collecting iron pieces mixed in magnetic ore, comprising a ferromagnetic iron piece recovery hopper arranged at the bottom of an endless belt outside the magnetic field of a weak excitation electromagnet in the driving direction of a magnetic separator belt. (ii) The electromagnets for strong excitation and weak excitation are each composed of a yoke and an excitation coil t arranged inside the yoke, and the magnetic pole of each yoke is parallel to the upper surface of the lower side of the endless magnetic selection belt. 2. The magnetic separator according to claim 1, wherein the space of each yoke is closed by a non-magnetic suppuration plate installed between the magnetic poles. 3. The magnetic separator according to claim 1 or 2, wherein the yokes of the electromagnets for strong excitation and for weak excitation are integrally constructed. A magnetic separator according to claim 11 or 3, wherein the recovered iron ore conveyor and the raw material conveyor are arranged parallel to each other. S: On the peripheral surface of l pairs of pulleys arranged horizontally opposite each other at both ends of the space formed between the upper and lower sides of which the endless magnetic separation belts are arranged substantially parallel to each other. The magnetic separator according to claim 1, wherein the magnetic separator is wound around the magnetic separator, and at least one pulley is driveable. The upper side of the magnetically selected petite in the shape of Mu is pressed by a tension wheel installed to fix the internal pressure of the space formed between the upper and lower sides, so that tension is constantly applied. A magnetic separator according to any one of claims 1-j. One of the two l pulleys is placed outward from the recovered iron ore conveyor of the raw material conveyor. 7. The magnetic separator according to claim 3, wherein the other is disposed approximately at the center of the upper opening of the ferromagnetic iron piece recovery hopper.