JPS6233726A - Method for recovering metal by aluminum alloy melted slag - Google Patents

Abstract

PURPOSE:To recover high quality metal with a high recovery ratio, by throwing melted slag into a gap between crushing members of vertical crusher, and crushing slag preferentially so that it is piled on upper surface of a feeder and stayed at a crushing gap. CONSTITUTION:A melted slag 1 is thrown into the crushing gap 14 composed of a fixed rocking crushing member 11 and a movable shaking milling member 12 through a supplying machine 2. The slag 1 is pressed, crushed, rubbed and discharged from a lower part aperture 15 by the feeder 16, but the discharging is suppressed. Consequently, since the slag is crushed preferentially compared with metal, slag sticking to metal is peeled off gradually and separated to single bodies. The crushed melted slag 4 is supplied to a sieving machine 5 to separate the metal 6 from the slag 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recovering metal using aluminum molten slag.

[Conventional technology]

The molten slag generated during aluminum melting is a mixture of molten metal, oxides, lining materials, solvents, etc., and is cooled and solidified before being transported away.

However, since this molten slag contains valuable aluminum alloy metal, various improvements have been made to separate it from slag and recover and recycle it.

Conventionally, this type of metal recovery method using aluminum alloy molten slag involves removing large lumps of aluminum alloy pieces from the molten slag, and then feeding the pieces to a grinder such as a rod mill for grinding to separate the metal and slag. They were trying to collect the bullion.

FIG. 2 shows the structure of the conventional metal recovery method using molten aluminum alloy slag. In Figure 2,
1 is a melted slag, 2 is a feeder, 3 is a rod mill,
5 is a sieving machine. The molten slag 1 is supplied to a rod mill 3 by a feeder 2, and the molten slag 1 is ground by the rotation of a grinding medium in the rod mill 3, thereby obtaining a ground molten slag 4. At this stage, preferential grinding is performed, and the slag is ground preferentially compared to the base metal, so the slag attached to the base metal is gradually peeled off and separated into individual pieces as the grinding progresses. Then, the state changes to a collective state of both.

Furthermore, when comparing the particle sizes of the two, slag is finer than base metal.

Next, the ground and dissolved slag 4 is sieved and fed to a machine 5.
The sieved souvenirs are sorted and separated as ingots 6, and the products under the sieve are separated as slag 7, and the ingots 6 from the dissolved slag 1 can be recovered.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional metal recovery method using molten aluminum alloy slag, a rod mill is used as the grinder, so when the rolling action is performed, voids are formed in the areas where the rods come into contact. , the slag is not sufficiently ground and is discharged without being pulverized.

In the case of such ground and dissolved slag, the slag is sieved in a machine with a relatively coarse particle size, and the slag is separated into base metal.

Since the slag must be recovered and remelted, the effectiveness of sorting and separation is significantly reduced, and valuable fine ingots are mixed into the slag. Furthermore, during grinding, the rolling action of the rod tends to spread the ductile metal, which increases impurities due to slag inclusion, which not only reduces recovery efficiency but also reduces the grinding process. There was a problem in that high grinding power was required.

The present invention solves these conventional problems,
The object of the present invention is to provide an excellent method for recovering ingots using aluminum alloy molten slag, which can recover even minute ingots, improve recovery efficiency, and grind with low grinding power.

[Means for solving problems]

In order to achieve the above object, the present invention provides a manufacturing method for obtaining ingots by supplying molten slag generated during aluminum alloy melting to an attritor, in which the molten slag is transferred to an oscillating grinding section of an oscillating attritor.・Inject into the material gap, then discharge from the lower opening into the feeder, perform preferential grinding so that it is deposited on the upper surface of the feeder and stagnates in the grinding gap, and separates the metal and slag. This is what I did.

(Function) The present invention has the following effects due to the above configuration. That is, the molten slag is introduced into the gap between the oscillating grinding members of the oscillating grinder, and then discharged from the lower opening into the feeder, where it is preferentially ground so that it is deposited on the upper surface of the feeder and stagnated in the grinding gap. As a result, even fine metal can be recovered, improving the recovery efficiency and reducing the grinding power.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic block diagram of a method for recovering metal using aluminum alloy molten slag according to the present invention.

In FIG. 1, 1 is a melted slag, 2 is a feeder,
10 indicates an oscillating attritor. The oscillating grinding machine 10 has a fixed oscillating grinding member 11 and a movable oscillating grinding member 12, and the movable oscillating grinding member 12 is made swingable by an appropriate swinging mechanism 13, and the grinding gap 14 is made swingable. A feeder 16 is installed in the lower opening 15.
are placed in close proximity. Therefore, in the above embodiment, the molten slag 1 is charged into the grinding gap 14, and the molten slag 1 is fed into the grinding gap 14 by the biting movement of the grinding members 11.12.
is compressed, crushed, polished and discharged, but the feeder 1
6 suppresses discharge from the lower opening 15, causes the molten slag 1 to stay between the grinding members 11 and 12, and increases the filling state, thereby promoting grinding between the molten slags and achieving preferential grinding. is carried out, and the slag is ground preferentially compared to the base metal, so the slag attached to the base metal is gradually peeled off during the above grinding process and separated into individual units, and the two form an aggregation state. The slag is refined.Then, the ground and dissolved slag 4 is sieved and fed to a machine 5, the sieved product is used as ingot 6, and the sieved product is used as slag 7.
The molten slag 1 can be sorted and separated to recover the ingot 6.

The table below shows a comparison of data obtained from experimental examples based on the above-mentioned examples and data obtained by grinding using a rod mill.

As can be seen from the data in the table above, the method according to the present invention can recover even the finest ingots, improving recovery efficiency, and the bulk specific gravity of the ingots is also large, preventing the contamination of slag and impurities. It was found that a small amount of good-quality metal could be recovered, and the power required for grinding was much less than when using other grinders, so it was also found that manufacturing costs could be reduced.

It should be noted that the mode of the oscillating attritor used in the present invention is of course not limited to that of the above-mentioned embodiments, and furthermore, other means that can also adjust the discharge gap and discharge amount may be used as the feeder. No problem.

〔Effect of the invention〕

As is clear from the above embodiments, the present invention provides dissolved slag that is introduced into the gap between the oscillating grinding members of the oscillating attritor, and then discharged from the lower opening into the feeder, where it is deposited on the upper surface of the feeder and is deposited in the grinding gap. By performing preferential grinding so that the metal remains stagnant, individual elements are separated, and it is possible to recover even the finest ingots, improving recovery efficiency and recovering high-quality ingots. The effects are significant, such as requiring less power.

[Brief explanation of the drawing]

FIG. 1 is a schematic flow diagram of a metal recovery method using aluminum alloy molten slag according to an embodiment of the present invention, and FIG. 2 is a schematic flow diagram of a conventional metal recovery method using aluminum alloy molten slag.

Claims (1)

[Claims] In a manufacturing method in which metal is obtained by supplying molten slag generated during aluminum alloy melting to a grinder, the molten slag is introduced into the gap between the oscillating grinding members of the oscillating grinder, and then fed into a feeder through a lower opening. Ingot recovery using aluminum molten slag, characterized in that preferential grinding is performed so that the ingot is discharged, deposited on the upper surface of the feeder, and stagnate in the grinding gap, and the ingot and slag are separated. Method.