JPS58210867A - Method and apparatus for sorting metallic scrap - Google Patents

Abstract

PURPOSE:To sort efficiently metallic scrap without using a magnet, by vibrating the crushed scrap together with powder having specified specific gravity, separating them into layers by specific gravity, recovering them layer by layer, and removing the powder. CONSTITUTION:Sandy powder having specified specific gravity is put on a vibrating vessel 4, and the scrap crushed by a crusher 1 is put into the vessel 4 from a feeding device 3. The scrap put into the vessel 4 is mixed with the powder, and while vibrating, separated into layers. Dust, etc. lighter than the powder is discharged from an upper outlet 6 to a pulsating screen 9, and separated from the powder and carried out by a conveyor 13. The scrap nearly equal in specific gravity to the powder is discharged from a middle outlet 7 to a vibrating screen 10, separated from the powder, and carried out by a conveyor 14. The scrap greater in specific gravity than the powder is put into a vibrating screen 11 from a lower outlet 8 of the vessel 4, separated from the powder, and carried out by a conveyor 15. The powder discharged from screens 9, 10, 11 is circulated to the vessel 4 through a conveyor 12 and a feeding device 13.

Description

[Detailed Description of the Invention] The present invention provides a method for sorting scraps obtained by crushing waste products or empty cans from automobile bodies or machines mainly made of metal such as washing machines and refrigerators using an appropriate crusher, and this method. The present invention relates to a sorting device to be used.

This kind of scrap is mainly iron-based materials such as steel plates, but it also contains copper, aluminum, and plastic, so it must be sorted using a sorter.
When metals are crushed by a crusher, they are rolled into a nearly spherical shape, which makes them inefficient for sorting iron with a magnetic separator or aluminum with an aluminum separator. This is because each layer of the scrap is rounded and has a curved outer surface, which deteriorates the adsorption effect on the magnetically applied surface.

An object of the present invention is to efficiently sort scraps that are difficult to sort with a sorter using magnetic force as described above, without using magnetic force.

That is, in this invention, scrap crushed by a crusher is thrown into a powder of aluminum having a predetermined bulk specific gravity that is vibrated by an appropriate means, and scrap that floats and scrap that sinks due to the difference in specific gravity. The present invention provides a method and apparatus for sorting scrap by separating and recovering scrap that remains in the intermediate portion and removing powder.

The details of this invention will be explained below based on an embodiment shown in the accompanying drawings.

In the figure, 1 is a crusher, which can be of any type, but 1 is a grinder that has a shell liner fixed in a cylindrical shell to provide unevenness, and is attached to a rotating shaft located at the center of the shell. This is a method of crushing waste products including metals put into a shell using a hammer or a hammer, and 2 is a conveyor for putting the waste products into the crusher 1.

3 is a scrap supply device such as a belt conveyor that supplies scrap discharged from the crusher 1 to a vibrating container 4.

The above-mentioned vibration container 4 has an open top, is supported in a floating manner by a plurality of springs 5, and is given double vibration, right and left, front and back, etc. by a vibrator (not shown). At the upper front of this container 4 is an outlet 6 for storing light items.
A lower part for taking out items of intermediate weight is provided in the front middle stage, and an outlet 8 for taking out items of the heaviest weight with a specific gravity of 1 is provided at the bottom.
1. In addition, the scraps discharged from each outlet 6, 7.8 are received by appropriate vibrating sieves 9, 10.11, and the powder discharged to the bottom of the tea caddy 9, 10.11 is The scraps are sent to the scrap supply device 3 by the belt conveyor 12 and returned to the container 4 together with the scraps.

Further, the scraps passing over each vibrating sieve 9, 10.11 are conveyed to a target location by each belt conveyor 13, 14.15 and collected.

The mounting surface for carrying out the method of the present invention has the above-mentioned structure, and its operation will be explained below.

First, a sand-like powder having a bulk specific gravity similar to that of aluminum scrap is placed in a vibrating container 4, and the scrap crushed by the crusher 1 is fed into the vibrating container 4 by the feeding device 3.

While the scraps put into the container 4 are mixed with the sand-like powder in the container 4 and vibrated, the garbage such as plastics, paper, cloth, wood pieces, etc. whose bulk specific gravity is lighter than the powder is removed from the outlet in the -F section. The garbage discharged from the vibrating screen 6 to the vibrating sieve 9 and separated from the powder is sent to a garbage treatment plant or the like via a conveyor 13.

Scraps having approximately the same specific gravity as the powder, such as aluminum scrap, are discharged from an intermediate take-out 17 to a vibrating sieve 10, and the aluminum scrap from which the powder has been removed is conveyed to a desired location by a conveyor 14.

Further, scraps having a higher specific gravity than powder, such as iron, sink to the bottom of the vibrating container 4 and pass through the vibrating sieve 11 through the outlet 8 at the bottom.
The powder is removed there, and the task wrap is conveyed to a desired location by a conveyor 15.

Further, the powder discharged downward from each of the vibrating sieves 9, 10, 11 is returned to the supply device 3 by the conveyor 12, and is again supplied into the vibrating container 4 together with the scraps.

As described above, this invention utilizes the difference in specific gravity by inserting metal scrap containing the metal to be sorted into a powder having approximately the same bulk specific gravity as the metal to be sorted, such as powder having a bulk specific gravity similar to that of aluminum. It can separate dust that is lighter than powder, aluminum that has the same specific gravity as powder, and iron that is lighter than powder.

Therefore, since there is no magnetic force, there is an effect that even iron-based metals with shapes that are difficult to attract to small stones can be sorted efficiently.

[Brief explanation of the drawing]

The drawing is a side view showing an example of an apparatus for carrying out the sorting method of the present invention. 1. Crusher, 3. Scrap supply device, 4. Vibration container, 9.10.11. Vibration sieve. Patent applicant: Kubota Iron Works Co., Ltd. Agent: Kama 1) Bun 2

Claims (1)

[Claims] 1. By vibrating scrap crushed by a crusher together with powder having a predetermined specific gravity, scraps lighter than the powder are made to float in two layers, and scraps with a specific gravity heavier than the powder are made into powder. A metal scrap sorting method characterized in that metal scrap is sunk in the lower layer of the metal scrap, and scrap with approximately the same specific gravity as the powder is placed in the middle, and the scrap in each layer is collected together with the powder in each layer to remove the powder. 2. A vibrating container filled with powder having a bulk density similar to that of aluminum scrap, etc., a scrap feeding device that supplies the crushed scrap to this container, and a "two-layer," by vibrating together with the powder in the vibrating container. A metal scrap sorting device that is equipped with a vibrating sieve for each layer to collect the scraps separated into the middle and lower layers and separate the powder.