JPH0525551B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is directed to fine iron powder and iron pieces contained or mixed in raw materials used in the chemical industry, food industry, pharmaceutical industry, ceramic industry, mining industry, high-tech industry, etc. This invention relates to a device that automatically and continuously removes such substances.

[Prior Art] There is a bar separator shown in FIG. 4 as a device for removing ore from raw materials mixed with fine iron powder. This is because a plurality of rod-shaped magnets are arranged in a staggered, lattice, or other form through a rectangular cylindrical main body case, and when the raw materials are passed through the main body case, they are mixed into the raw materials. The fine iron powder is absorbed by this magnetic bar, and only the raw material is discharged to the outside of the main body case to perform iron removal.

[Problems to be Solved by the Invention] When a raw material passes between magnetic bars arranged in a lattice or staggered pattern, fine iron powder mixed in the raw material is attracted to the magnetic bars by magnetic action. However, if more than the allowable amount of fine iron powder is adsorbed on the surface of the magnetic bar, the adsorption iron removal ability will decrease. In order to prevent this and ensure that a predetermined iron removal ability is always exhibited, it is necessary to clean the magnet bar periodically or when more fine iron powder has adhered than an allowable amount.

Conventionally, the cleaning work for removing the fine iron powder adsorbed on the magnetic bar involves removing the magnetic bar from the main body case and wiping it off one by one with a rag, blowing air on it, or peeling it off with packing tape. However, this cleaning of the magnet bar (removal of iron) is time-consuming and tends to be avoided in industries where magnet bars are frequently used.

Furthermore, with the recent development of rare earth magnets, the magnetic force of the magnetic bar has become stronger, and when the magnetic bar is removed from the main body case for cleaning, it is dangerous to have your fingers pinched or hit hard by the attraction or repulsion of this magnetic force. Cleaning by hand is becoming difficult.

An object of the present invention is to provide an automatic iron removal device that can automatically clean fine iron powder that has been adsorbed and removed.

[Means for Solving the Problems] The present invention has been made to achieve the above-mentioned object, and the first invention is an automatic de-iron removal device in which a bifurcated pipe is connected to an inlet pipe for transferring raw materials through a damper. A branch pipe is provided, one chamber of the iron removal chamber separated into two chambers is connected to each of these branch pipes by a partition wall, and a plurality of through pipes made of non-magnetic material are arranged at required intervals to penetrate both iron removal chambers. In this penetrating pipe, a magnetic element having a length equal to or smaller than the length of one iron removing chamber in the portion passing through the through pipe is arranged selectively on either side of both iron removing chambers. A bifurcated discharge pipe having a damper is provided at the lower part of both iron removing chambers, and a lead-out pipe is connected to each one of the discharge pipes.

Moreover, the gist of the second invention is that the iron removal chamber, the branch pipe, and the discharge pipe of the automatic iron removal apparatus of the first invention are made of a non-magnetic material.

[Operation] The raw material flowing down into the introduction pipe is supplied to one of the branch pipes by operating a damper interposed between the introduction pipe and the branch pipe. At this time, raw materials are not supplied to local branch pipes and de-iron removal chambers. The raw material supplied into the iron removing chamber via the branch pipe flows down the chamber while passing between or colliding with the through tubes made of non-magnetic material. At this time, by positioning a magnetic element in the through-tube on the side of the iron removal chamber, the magnetic force of this magnetic element attracts the fine iron powder mixed in the raw material to the outer peripheral surface of the through-tube made of non-magnetic material. Then, the raw material after iron removal is discharged through the discharge pipe to the outlet pipe, thereby performing the iron removal process of the raw material. Then, when the required amount of fine iron powder is adsorbed to the through-pipe made of non-magnetic material, or periodically, the magnetic element is moved into the through-pipe on the other side of the iron removal chamber, and each damper is switched.
The raw material from the introduction pipe is supplied to the other de-iron removal chamber through a branch pipe, and de-iron treatment is performed in the same manner.

By moving the magnetic element into the through pipe on the other side of the iron removal chamber, the magnetism around the through pipe on the one side of the iron removal chamber disappears, and the fine iron powder adsorbed on the outer periphery naturally falls. . At this time, since the damper is switched, the fallen fine iron powder is taken out from the discharge pipe separately from the raw material after iron removal.

By moving the magnetic element and switching the damper in this manner, the raw material is continuously deferroused (iron removed).

In addition, if the iron removal chamber, branch pipe, and discharge pipe are made of non-magnetic material, the iron removal chamber, branch pipe, and discharge pipe may be
Fine iron powder will not adhere to the inner peripheral surfaces of the branch pipe and discharge pipe.

[Example] The present invention will be described below based on a specific example.

In the figure, 1 and 2 are de-iron removal chambers of the same size and at least the same length (width) in the adjacent lateral direction. The iron removal chambers 1 and 2 are separated by a non-magnetic partition wall. A plurality of through tubes 3, 3, . . . made of a non-magnetic material are disposed to pass through both the iron removal chambers 1, 2. A large number of through pipes 3 are arranged in parallel at required intervals in the horizontal direction so that the granular or powdered raw materials falling in the iron removal chambers 1 and 2 collide uniformly. They are arranged in a staggered or lattice pattern so that the In the illustrated embodiment, they are arranged in a staggered manner in two stages, upper and lower, but they can also be arranged in multiple stages.

Rod-shaped magnetic elements 4, 4 made of rare earth magnets such as neodymium, samarium cobalt, or other magnets are slidably inserted into each of the through tubes 3. This magnetic element 4 has a length equal to or slightly smaller than the length of the iron removal chambers 1 and 2 through which the penetration pipe 3 penetrates, and is placed inside the penetration pipe on the one side of the iron removal chamber. When positioned, make sure that it does not enter the through pipe on the other side of the iron removal chamber. This prevents magnetism from acting inside the other iron removal chamber when the iron removal chamber is located on the side of one iron removal chamber. The movement of the magnetic element 4 between the iron removing chambers is carried out simultaneously by manual operation of the cables or by a cylinder or other drive mechanism (not shown).

Furthermore, bifurcated branch pipes 5 and 6 made of non-magnetic material are connected to the upper part of each de-iron removal chamber 1 and 2 via flanges.
An introduction pipe 7 is connected to the branch pipes 5 and 6 via a damper 8.
Connect. By switching the damper 8, the raw material flowing down the outlet pipe 7 is selectively supplied to one of the branch pipes.

In addition, the lower portions of the two iron removal chambers 1 and 2 are funnel-shaped, and bifurcated discharge pipes 9 and 10 made of non-magnetic material having dampers 11 and 12 are connected to this, and both discharge pipes 9 and 10 are branched. A discharge pipe 13 for discharging the raw material after iron removal is connected to one side in common, and fine iron powder is taken out from the other side separately from the raw material after iron removal.

In addition, the movement of the magnetic element 4 between the iron removal chambers and the switching of the dampers 8 interposed between the inlet pipe 7 and the branch pipes 5 and 6 and the dampers 11 and 12 in the discharge pipes 9 and 10 may also be performed manually. However, it is desirable to be able to perform both simultaneously using a drive device (not shown).

When the magnetic force disappears in the through-tube made of non-magnetic material due to the movement of the magnetic element, air is injected toward the outer circumferential surface of the through-tube in order to more reliably remove the fine iron powder adsorbed on the through-tube. An air nozzle (not shown) may also be provided within the deironization chamber.

[Effects of the Invention] According to the automatic iron removal device of the present invention, the raw materials can be continuously deironated by alternately switching between the two iron removal chambers that perform the iron removal treatment on the raw materials. Further, it has the advantage that the removal of iron can be automatically cleaned by moving the magnetic element between the iron removal chambers and switching the damper.

Further, according to the automatic iron removal device of the second invention, fine iron powder is not adsorbed in the iron removal chamber, the branch pipe, and the discharge pipe, and the iron removal can be easily and reliably cleaned. has advantages.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view, FIG. 2 is an enlarged sectional view of the main part, FIG. 3 is a side view, and FIG. 4 is a known example. 1 and 2 are iron removal chambers, 3 is a through pipe, 4 is a magnetic element, 5 and 6 are branch pipes, 7 is an introduction pipe, 8, 11,
12 is a damper, 9 and 10 are discharge pipes, and 13 is a discharge pipe.

Claims (1)

[Scope of Claims] 1. A bifurcated branch pipe is provided via a damper in the introduction pipe for transferring raw materials, and one chamber of the iron removal chamber, which is separated into two chambers by a partition, is connected to each of the two branch pipes, A plurality of through pipes made of non-magnetic material that penetrate both iron removal chambers are arranged at required intervals, and the length of the part of the through pipe penetrated by the through pipe is equal to or longer than the length of one iron removal chamber. A small magnetic element is slidably disposed selectively on either side of both de-iron removal chambers, and a bifurcated discharge pipe with a damper is provided at the bottom of both de-iron removal chambers. An automatic iron removal device characterized by having a lead-out pipe connected to one end of each. 2. The automatic iron removal apparatus according to claim 1, wherein the iron removal chamber, the branch pipe, and the discharge pipe are made of a non-magnetic material.