JPH11300332A - Treatment of waste fluorescent tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a treating device compact and to recover a glass, a fluorescent material, aluminum, etc., from the fluorescent tube at a low cost. SOLUTION: A surface of the glass is made smooth and also the glass and a powder such as fluorescent material containing mercury is separated by treating the glass containing a screened fluorescent material with a machine using a ball or a medium such as a ball mill, a tube mill, a vibration mill and a barrel abrasive machine, and the glass and the powder such as a fluorescent material are separated with a screen, etc., in a dry process. In this way, an inclusion of an impurity to the fluorescent material, etc., is less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a waste fluorescent tube.

[0002]

2. Description of the Related Art Conventionally, when a used waste fluorescent tube is treated, the waste fluorescent tube is crushed and wet-processed by washing with a cleaning solution containing a chelate or the like, or the base portion is removed and crushed. A method of introducing an airflow into the glass of a waste fluorescent tube to remove a fluorescent substance has been performed.

[0003]

However, in the above-mentioned wet processing, since the fluorescent substance is fine, complicated steps are required for filtration, drying, and washing, and there is a problem that the apparatus becomes large and expensive. And the cost of recovery became high.

[0004] On the other hand, the method of blowing off with an air current such as air has a problem in enormous cost and maintenance of a dust collector for recovery because the fluorescent substance is fine.

[0005] The glass recovered by these methods has a sharp surface, and there is a risk of injuring the hand when touched.

[0006]

In order to solve the above-mentioned problems, the inventions of claims 1 and 2 use the balls or media such as a ball mill, a tube mill, a vibration mill or a barrel grinder to sort the selected glass. By treating with a machine, the surface of the glass is smoothed, and the glass and the powder such as a fluorescent substance containing mercury are separated, and the glass and the powder such as the fluorescent substance are separated by a sieve or the like.

[0007] The invention of claim 3 is claim 1 and claim 2
In the invention of the present invention, the generated mercury gas had to be treated separately, but by mixing powder or granular material such as activated carbon for mercury adsorption, the generated mercury gas was converted into a ball mill,
It is characterized in that it is processed in a tube mill, vibration mill, barrel polishing machine or the like.

[0008] The invention of claim 4 is claim 1 and claim 2.
In the invention of the present invention, the generated mercury gas had to be treated separately, but by using porous ceramics and metals for balls and media and impregnating with a mercury-adsorbing chemical, the generated mercury gas was ball milled. It is characterized in that it is processed in a tube mill, vibration mill, barrel polishing machine or the like.

The invention of claim 5 is characterized in that mercury gas generated is treated in the vibrating sieve by impregnating a mercury-absorbing chemical into the netting rubber of the vibrating sieve.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Mercury adheres to the inner surface of a waste fluorescent tube. According to the first aspect of the invention, first, the base portions on both sides of the waste fluorescent tube are removed and crushed. The crushed glass is processed by a machine that uses balls and media, such as a ball mill, tube mill, vibration mill, and barrel polisher, to smooth the glass surface and separate the glass and powders such as fluorescent materials containing mercury. Then, the glass and the powder such as the fluorescent substance are separated by a sieve or the like.

Most of the mercury adheres to the fluorescent material,
Vaporize. The mercury adhering to the fluorescent substance is removed by heating, wet processing of cleaning with a cleaning liquid containing a chelate or the like, or processing by an existing process of removing in the step of recovering the rare earth metal compound.

The glass having a smooth surface is made 1.5 mm or less and used as a raw material for tiles or 1 mm or less, and used as an abrasive or filler. Although the glass contains a small amount of mercury, it is treated by heating or washing depending on the application.

According to a second aspect of the present invention, when recovering waste fluorescent lamps for general household use, the fluorescent lamp has a straight tube type, a ring type, a compact type and various sizes. At the time of recovery, it is difficult to remove and crush the bases on both sides of the waste fluorescent tube. For this reason, waste fluorescent tubes are crushed, and glass, iron,
Sort aluminum. The glass of the selected waste fluorescent tubes is
A small amount of resin, tungsten, aluminum, etc. is mixed.
When this glass is processed by a machine using balls and media such as a ball mill, a tube mill, a vibration mill and a barrel polisher, and reduced to 1.5 mm or less by a sieve, resin, aluminum, etc. are removed on the sieve, Adhesive resin and tungsten are mixed into the glass. After the powder such as a fluorescent substance is separated by a sieve of 100 μ or less, the contaminants are separated by washing, a color sorter, a specific gravity sorter or the like. The mercury adhering to the fluorescent substance is removed by heating, wet processing of cleaning with a cleaning liquid containing a chelate or the like, or processing by an existing process of removing in the step of recovering the rare earth metal compound.

According to a third aspect of the present invention, when the glass is processed by a machine using balls or media such as a ball mill, a tube mill, a vibration mill or a barrel polishing machine, powder or granules such as activated carbon for mercury adsorption are mixed. Removes mercury that evaporates. Activated carbon or the like adsorbing mercury is mixed into the fluorescent substance, but the activated carbon is not dissolved in the chemical, and thus is removed when the fluorescent substance is collected.

[0015] The invention according to claim 4 is a chemical which adsorbs mercury on porous ceramics or metal when the glass is processed by a machine using balls or media such as a ball mill, a tube mill, a vibration mill or a barrel polishing machine. To adsorb and remove mercury vaporized by impregnation.

According to a fifth aspect of the present invention, mercury vaporized is removed by impregnating a mercury-adsorbing chemical into a netting rubber of a vibrating screen.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for treating a waste fluorescent tube according to the present invention will be described below with reference to claim 2. FIG. 1 shows a system flowchart of the waste fluorescent tube processing vehicle. The drum type magnetic separator and the non-ferrous metal separator do not always need to be loaded on the waste fluorescent tube treatment vehicle. The fluorescent tube is destroyed on the processing vehicle, and
Conveyed in the volume.

Most of the mercury, the fluorescent substance and the glass are collected in the glass of FIG. 1 and the glass powder of the dust collector. These are processed in the step shown in FIG. Since the powder such as the fluorescent substance is removed in advance by a sieve, the glass is transparent and the amount of the fluorescent substance is small. For this reason, the amount of the fluorescent substance in the glass cleaning / impurity step is small, and the amount of the fluorescent substance is small as shown in FIG.
Twelve spheres of powder such as a fluorescent substance are caught by a fluid bed filter 715, and phenol resin such as a base adhesive is accumulated at a lower portion of the fluid bed filter. By this operation, the cleaning water can be circulated to purify the glass.

The refined glass is a resin filler such as resinoid grindstones, non-slip road pavement, traffic paint, artificial marble, abrasive cloth paper, abrasives and tiles, building exterior walls, block walls, roof tiles, etc. Of ceramics.

The fluorescent substance recovered by the dry method may be any one of a method of removing mercury by heating, a method of processing during the recovery of rare earth metal, and a method of performing heat treatment after separating rare earth. Separation of the rare earth element of the fluorescent substance is performed by an existing method. For example, it is carried out by a method of disposing of a fluorescent lamp disclosed in Japanese Patent Application Laid-Open No. 9-283085, a method of disposing of the fluorescent lamp, a treatment with hydrochloric acid using a mechanochemical method described in Nikkan Kogyo Shimbun on April 16, 1998, or the like.

[0022]

According to the waste fluorescent tube treatment method of the present invention, most of the fluorescent material is separated by a sieve in a dry manner, so that the recovery of the fluorescent material is simplified as compared with the conventional wet treatment method, and the fluorescent material is reduced. The contamination with impurities is also reduced. The glass has a smooth surface and will not be injured by direct hand contact.

[Brief description of the drawings]

FIG. 1 is a system flowchart of a waste fluorescent tube processing vehicle.

FIG. 2 shows an example of a process for processing waste fluorescent tubes collected by a waste fluorescent tube processing vehicle.

FIG. 3 is a fluidized bed filter when circulating washing water.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 1st filtration part 3 Washing water 4 Washing water supply nozzle 5 Washing water discharge nozzle 6 Upper housing 7 Lower housing 8 Male screw 9 Female screw 10 Separation surface 11 Through-hole 12 Spherical object

Claims (5)

[Claims] Claims: 1. The bases on both sides of a waste fluorescent tube are removed, and the crushed glass of the waste fluorescent tube is subjected to ball mill, tube mill,
Waste fluorescent tube treatment method characterized by processing with a machine using balls and media such as a vibration mill or barrel polishing machine, and separating the powder such as glass and fluorescent substance with a sieve 2. A waste fluorescent tube is crushed, glass is sorted by a drum-type magnetic separator and a non-ferrous metal sorter, and the glass of the sorted waste fluorescent tube is separated into a ball such as a ball mill, a tube mill, a vibration mill and a barrel polishing machine. A method for treating a waste fluorescent tube, comprising treating with a machine using a medium and separating powder such as glass and fluorescent substance with a sieve. 3. When the glass is processed by a machine using a ball or a medium such as a ball mill, a tube mill, a vibration mill or a barrel polishing machine, powder or granular material such as activated carbon for mercury adsorption is mixed. 3. A method for treating a waste fluorescent tube according to claim 1. 4. When treating glass with a machine using balls and media such as a ball mill, a tube mill, a vibration mill and a barrel polishing machine, the balls and media are impregnated with a porous ceramics or metal with a chemical for adsorbing mercury. 3. The method for treating a waste fluorescent tube according to claim 1, wherein: 5. The screen sieve rubber of the vibrating sieve is impregnated with a chemical for adsorbing mercury.
5. The waste fluorescent tube treatment method according to claim 3 or claim 4.