JP2001277115A - Reuse system for abrasive grain slurry of wire saw and centrifugal separator thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such problems that a conventional constitution is one of supplying a particulate mixed liquid of a first separating means directly to a second separating means, makes separation difficult between an abrasive grain and cutting fluid by generating viscosity in the particulate mixed liquid, and consequently has problems of making efficient separation incapable in the second separating means and easily generating abrasion, damage, etc., and so on. SOLUTION: In this constitution, abrasive grain waste liquid is separation treated into a recycled abrasive grain and fine abrasive grain mixed liquid in a first centrifugal separator 1, the recycled abrasive grain is guided to a recovery abrasive grain tank 25, the fine abrasive grain mixed liquid is guided to a separation liquid tank 27 a new cutting fluid is added to the fine abrasive grain mixed liquid in the separation liquid tank, to be guided to a second centrifugal separator, to be separation treated therein to a waste abrasive grain and recovered cutting fluid, the recovered cutting fluid is guided to a recovery cutting fluid tank, the recovered cutting fluid in the recovery cutting fluid tank is guided to the recovery abrasive grain tank, a new abrasive grain for dilution and the cutting fluid are respectively added to the recovered cutting fluid and the recycled abrasive grain in the recovery abrasive grain tank, recycled abrasive grain mixed cutting fluid is generated and supplied to an abrasive grain supply tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for recycling a wire saw abrasive slurry and a centrifugal separator therefor.

[0002]

2. Description of the Related Art Conventionally, in a wire saw, an abrasive slurry obtained by mixing an abrasive as a cutting material and a cutting liquid is used. And
Recently, used abrasives and cutting fluids are collected, separated and reused from the viewpoint of effective use of resources (reduction of cutting cost) or environmental protection. In connection with this, literatures aiming to reuse the wire saw abrasive slurry can be found, and examples thereof will be described as literatures (1) and (2).

Document (1) is a method and an apparatus for regenerating a wire saw abrasive slurry disclosed in Japanese Patent Application Laid-Open No. H11-172237, and the contents are schematically described as follows.

[0004]

Reference (2) is a wire saw abrasive circulating apparatus disclosed in Japanese Patent Application Laid-Open No. 11-33913, and its contents are schematically described as follows.

[0006]

[0007]

The above-mentioned documents (1) and (2)
This is a configuration in which the fine particle mixed liquid of the first separation means is directly supplied to the second separation means. This fine particle mixed liquid is viscous,
Difficult to separate abrasive grains and cutting liquid. Therefore, this fine particle mixed liquid is directly supplied to the second separation means.
Efficient separation by the separation means cannot be achieved, or
However, there is a problem that a load is easily applied to the screw of the separating means, and the screw is liable to be worn or damaged.

The documents (1) and (2) do not employ a specific configuration with respect to the cutting edge and rotation control of the screw of the separating means, so that problems such as wear and damage of the cutting edge, and problems such as treatment for load can be considered. .

[0009]

According to the first aspect of the present invention, efficient separation is achieved by a second centrifuge, and wear, damage, etc. of the cutting edge of the screw of the second centrifuge are reduced. The purpose is to do so.

[0010] The first aspect of the present invention is to guide the abrasive waste liquid to a first centrifugal separator via a pipe, and to separate the regenerated abrasive particles and the fine abrasive mixed liquid by the first centrifugal separator. The grains are guided to a collection abrasive tank via a pipe, the fine abrasive mixed liquid is guided to a separated liquid tank via a pipe, and a new cutting liquid is added to the fine abrasive mixed liquid in the separated liquid tank while the piping is added. Through the second centrifugal separator, the second centrifugal separator separates the waste abrasive and the recovered cutting liquid, and then guides the recovered cutting liquid to a recovered cutting liquid tank via a pipe. The collected cutting liquid in the cutting liquid tank is guided to the collected abrasive tank via a pipe, and the collected cutting liquid in the collected abrasive tank and the regenerated abrasive are diluted with new abrasive grains and cutting liquid for dilution via the respective pipes. Are added to each other to produce a regenerated abrasive mixed cutting fluid, and the regenerated abrasive mixed The cutting liquid via a pipe which is reusable system wire saw abrasive grain slurry was configured to be supplied to the abrasive supply tank.

An object of the present invention is to reduce the load on the first and second centrifugal separators and to reduce wear, damage and the like of the cutting edge of the screw.

A second aspect of the present invention relates to a centrifugal separator used in a wire saw abrasive slurry recycling system. The centrifugal separator includes a casing having a solid substance discharge port and a separated liquid discharge port, and a casing having a casing discharge port. An interposed screw, a cutting liquid supply pipe interposed in the screw, a supply port opened to the screw and communicating with the cutting liquid supply pipe, a carbide chip provided at all cutting edges of the screw, and the screw This is a centrifugal separator used for a wire saw abrasive slurry recycling system, comprising a servomotor that controls the rotation speed of the screw when a load is applied to the screw, and a control unit that controls the servomotor.

[0013]

Embodiments of the present invention will be described below.

The used abrasive waste liquid is led from the wire saw to a stock solution tank. The abrasive waste liquid in the stock solution tank is guided to a first centrifugal separator via a first pipe, and the first centrifugal separator separates the regenerated abrasive and fine abrasive mixed liquid. Since the first centrifugal separator has a structure in which the carbide tips are provided on all the cutting edges of the screw, the cutting edge of the screw is less worn, clogged, and separation processing can be performed reliably and smoothly. When a load is applied to this screw, the rotation speed of the screw is controlled via a control unit (equipped with a foot pack, a controller, a detector, etc.) and a surfer motor to prevent the failure of the first centrifuge and the screw. To prevent.

[0015] The separated regenerated abrasive grains are led to a recovered abrasive tank via a second pipe. The fine abrasive mixed liquid is guided to the separation liquid tank via the third pipe. This separation liquid tank is used to reduce the amount of recycled abrasive grains sent to the collected abrasive grain tank, reduce the amount of chips mixed into the collected abrasive grain tank described below, and ensure the quality of the recycled abrasive mixed cutting liquid.

The fine abrasive mixed liquid in the separated liquid tank is guided to a second centrifugal separator via a fourth pipe. In this process, the fine abrasive mixed liquid is newly added to the fine abrasive mixed liquid via a fifth pipe. Is supplied and diluted. The purpose of this dilution is to dilute the viscosity of the fine abrasive mixed liquid, secure the supply amount of the fine abrasive mixed liquid to the second centrifuge, and regenerate and collect the recycled abrasive in the second centrifuge. An object of the present invention is to promote separation from a cutting liquid and achieve efficient separation. In addition, the load on the screw of the second centrifugal separator is reduced, and the occurrence of wear, damage and the like of the screw is avoided. Further, the present invention is to replenish the amount of the recycled abrasive grains sent to the collected abrasive grain tank.

This diluted fine abrasive mixed liquid is
Centrifugal separator to separate waste abrasive and recovered cutting fluid,
The recovered cutting liquid is guided to the recovered cutting liquid tank via the seventh pipe.

The recovered cutting liquid in the recovered cutting liquid tank is
Guided to the collected abrasive tank via the eighth pipe, and mixed with the recycled abrasive and the collected cutting liquid in the collected abrasive tank, the ninth,
A new abrasive grain and a cutting fluid for dilution are respectively added via the 10 pipes to generate a regenerated abrasive mixed cutting fluid (regenerated abrasive cutting fluid).

The regenerated abrasive mixed cutting fluid is supplied to an abrasive supply tank via an eleventh pipe, and the abrasive liquid is supplied from the abrasive supply tank to the abrasive supply tank.
It is configured to supply to the wire saw through 12 pipes.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First and second centrifuges 1 and 10 used in the wire saw abrasive slurry recycling system of the present invention have the same configuration in principle, and the first centrifuge 1 will be mainly described. I do. No.
The centrifugal separator 1 includes a casing sink ゛ 2 having a solid matter outlet 2a and a separated liquid outlet 2b, a bamboo shoot screw 3 provided in an inner cylinder 200 of the casing ゛ 2, and a cutting edge 3a of the screw 3. Carbide chip provided
4 and a surf motor 5 for driving the screw 3 and a surf motor 5
And a supply pipe 7 for the abrasive waste liquid or fine abrasive mixed liquid interposed in the screw 3, and the supply pipe 7
The opening 7a communicates with the opening 8 formed in the screw 3 via a gap between the screw 3 and the main body 300. The supply pipe 7 is rotated via a motor 9, but has a rotation difference between the supply pipe 7 and the screw 3. Note that the second centrifuge 10 is the first centrifuge 1
Follow.

Next, the overall structure and operation will be described. The used abrasive waste liquid is led from the wire saw 20 to the stock solution tank 21 via a pipe (not shown). The abrasive waste liquid in the stock solution tank 21 is
The mixture is led to the first centrifugal separator 1 through the first pipe 22 and the phon 23, and is separated into a mixed liquid of regenerated abrasive particles and fine abrasive particles by the first centrifugal separator 1. From the material discharge port 2a
It is led to the collected abrasive tank 25 through the second pipe 24. Further, the fine abrasive mixed liquid is guided to the separated liquid tank 26 from the separated liquid outlet 2b via the third pipe 26.

The fine abrasive mixed liquid in the separation liquid tank 27 is
Is guided to the second centrifugal separator 10 via the pipe 28 and the horn 29, and in this process, a new cutting liquid is supplied to the fine abrasive mixed liquid via the fifth pipe 30 and diluted. . The purpose of this dilution is to dilute the viscosity of the fine abrasive mixed liquid, promote separation of the regenerated abrasive and the recovered cutting liquid, and achieve efficient separation in the second centrifuge 10. . In addition, the load on the screw 3 of the second centrifugal separator 10 is reduced, and the occurrence of wear, damage and the like of the screw 3 is avoided.

The diluted fine abrasive mixed liquid is separated into waste abrasive and recovered cutting liquid by the second centrifugal separator 10, and the waste abrasive is discharged from the solid discharge port 2a through the sixth discharge port. Plumbing 3
The liquid is guided to the waste liquid abrasive grain tank 32 through 0. The recovered cutting liquid is guided from the separated liquid discharge port 2b to the recovered cutting liquid tank 34 via the seventh pipe 33.

The collected cutting liquid in the collected cutting liquid tank 34 is guided to the collected abrasive tank 25 through the eighth pipe 35 and the horn 36, and the collected cutting liquid is mixed with the regenerated abrasive in the collected abrasive tank 25. And the ninth and tenth pipes 37 and 38 and the phone 39,
A new abrasive and a cutting fluid for dilution are respectively added via 40 to produce a regenerated abrasive mixed cutting fluid (regenerated abrasive cutting fluid).

The regenerated abrasive mixed cutting liquid is supplied to an eleventh pipe
In this configuration, the abrasive is supplied to the abrasive supply tank 43 via the 41 and the horn 42, and is supplied from the abrasive supply tank 43 to the wire saw 20 via the twelfth pipe 44 and the horn 45.

Each of the above-mentioned tanks is provided with a stirring blade, a liquid level sensor and the like as necessary, as shown in the figure. Each pipe is provided with a flow meter, a high-pressure pipe, valves having various functions, and the like, as necessary, as shown in the figure.

[0027]

According to the first aspect of the present invention, the abrasive waste liquid is guided to a first centrifugal separator, and the first centrifugal separator separates the regenerated abrasive particles and the fine abrasive mixed liquid, thereby forming the regenerated abrasive particles. Guided to the collection abrasive tank,
The fine abrasive mixed liquid is led to the separation liquid tank, a new cutting liquid is added to the fine abrasive mixed liquid in the separated liquid tank, and the mixture is guided to the second centrifugal separator. Separate the collected cutting liquid and guide the collected cutting liquid to the collected cutting liquid tank.
The collected cutting fluid in the collected cutting fluid tank is led to the collected abrasive tank, and a new abrasive and a cutting fluid for dilution are added to the collected cutting fluid and the regenerated abrasive in the collected abrasive tank, respectively, and the regenerated abrasive mixed cutting liquid is added. And a wire saw abrasive slurry recycling system configured to supply a regenerated abrasive mixed cutting liquid to an abrasive supply tank. Therefore, it is possible to separate the abrasive waste liquid and add a new abrasive and a cutting liquid, respectively, to effectively use the recycled abrasive and the recovered cutting liquid. In addition, there are practical benefits such as efficient separation by the second centrifuge, and reduction of wear and damage of the cutting edge of the screw of the second centrifuge.

A second aspect of the present invention is a centrifugal separator employed in a wire saw abrasive slurry recycling system, wherein the centrifugal separator includes a casing having a solids discharge port and a separated liquid discharge port, and a casing having a casing discharge port. An interposed screw, a cutting liquid supply pipe interposed in the screw, a supply port communicating with the cutting liquid supply pipe opened in the screw, a carbide chip provided at all cutting edges of the screw, and a load was applied to the screw. It is a centrifugal separator used for a wire saw abrasive slurry recycling system, which is sometimes composed of a servomotor for controlling the rotation speed of the screw and a control unit for controlling the servomotor. Therefore, there are practical benefits such as a reduction in the load on the first and second centrifuges and a reduction in wear, damage, and the like of the cutting edge of the screw.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a pre-process of the present invention.

FIG. 2 is a flowchart illustrating a post-process of the present invention.

FIG. 3 is an enlarged schematic diagram of first and second centrifuges.

[Explanation of symbols]

 1 First centrifuge 2 Case sink 2a Solid outlet 2b Separated liquid outlet 200 Inner cylinder 3 Screw 300 Main unit 4 Carbide chip 5 Surf motor 6 Control unit 7 Supply pipe 8 Opening 9 Motor 10 Second centrifuge 20 Wire saw 21 Stock solution tank 22 First pipe 23 Phone 24 Second pipe 25 Collected abrasive tank 26 Third pipe 27 Separate liquid tank 28 Fourth pipe 29 Phone 30 Fifth pipe 31 Sixth pipe 32 Waste liquid Abrasive grain tank 33 Seventh pipe 34 Recovered cutting fluid tank 35 Eighth pipe 36 Phone 37 Ninth pipe 38 Tenth pipe 39 Phone 40 Phone 41 Eleventh pipe 42 Phone 43 Abrasive grain supply tank 44 12th Piping 45 phone

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[Procedure amendment]

[Submission date] December 14, 2000 (200.12.
14)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Claims (2)

[Claims] An abrasive waste liquid is guided to a first centrifugal separator via a pipe, and the first centrifugal separator separates the regenerated abrasive and fine abrasive mixed liquid. To the recovery abrasive tank via the pipe, the fine abrasive mixed liquid is guided to the separated liquid tank via the pipe, and the new cutting liquid is added to the fine abrasive mixed liquid in the separated liquid tank via the pipe. Guided to a second centrifugal separator, the second centrifugal separator separates waste abrasive and collected cutting liquid, and guides the collected cutting liquid to a collected cutting liquid tank via piping. The collected cutting liquid is guided to the collected abrasive tank through a pipe, and a new abrasive and a cutting liquid for dilution are added to the collected cutting liquid and the regenerated abrasive in the collected abrasive tank via the respective pipes. To generate a regenerated abrasive mixed cutting fluid, and this regenerated abrasive mixed cutting fluid Reuse system of the wire saw abrasive grain slurry was configured to be supplied to the abrasive supply tank through a pipe. 2. A centrifuge for use in a system for reusing a wire saw abrasive slurry, wherein the centrifuge includes a casing having a solid substance discharge port and a separated liquid discharge port, and a screw interposed between the casing and the casing. And a cutting liquid supply pipe interposed in the screw, a supply port communicating with the cutting liquid supply pipe provided in the screw, a carbide chip provided at all cutting edges of the screw, and a load applied to the screw. A centrifugal separator for use in a wire saw abrasive slurry recycling system comprising a servomotor for controlling the rotation speed of the screw when it is engaged and a control unit for controlling the servomotor.