JPH024660B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method for recovering metal using aluminum molten slag. [Prior Art] 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. 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, in this type of metal recovery method using aluminum alloy molten slag, large lumps of aluminum alloy pieces are removed from the molten slag, and then fed to a grinder such as a rod mill to be ground and separated into 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 FIG. 2, 1 is a molten slag, 2 is a feeder, 3 is a rod mill, and 5 is a sieve 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 rolling action 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 dissolved slag 4 is supplied to a sieving machine 5, and the products on the sieve are separated as ingots 6, and the products under the sieve are separated as slag 7. can. [Problems to be Solved by the Invention] However, in the above-mentioned conventional metal recovery method using aluminum alloy molten slag, a rod mill is used as a grinder, so when rolling operation is performed, each rod is Gaps are formed in the contact area, and the slag is not sufficiently ground and is discharged without being made into fine particles. Such ground and dissolved slag must be sieved with a relatively coarse particle size in a sieving machine to recover the metal and remelt it.
The effectiveness of sorting and separation is significantly reduced, and valuable fine metals are mixed into the slag. Furthermore, during grinding, the rolling action of the rods tends to spread the ductile metal, which increases impurities due to the inclusion of slag, 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, and uses superior aluminum alloy molten slag that can recover even the finest ingots, improve recovery efficiency, and grind with low grinding power. The purpose is to provide a method for recovering bullion. [Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a manufacturing method for obtaining a base metal by supplying the molten slag generated during aluminum alloy melting to a grinder. The material is introduced into the gap between the oscillating grinding members of the oscillating grinder, and then communicated with the feeder through the lower opening and discharged, and priority grinding is performed so that it is deposited on the upper surface of the feeder and stagnated in the grinding gap. , the base metal and slag are separated. [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 is then discharged from the lower opening in communication with the feeder, so that it is preferentially deposited on the upper surface of the feeder and stagnated in the grinding gap. By grinding, even fine metal can be recovered, improving the recovery efficiency and reducing the grinding power. [Example] Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is a schematic block diagram showing a method for recovering metal using aluminum alloy molten slag according to the present invention. In FIG. 1, 1 is a molten slag, 2 is a feeder, and 10 is an oscillating attritor. The oscillating grinder 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 a suitable swinging mechanism 13 and has a grinding gap 14.
A feeder 16 is placed close to the lower opening 15 of the feeder. Therefore, in the above-mentioned embodiment, the molten slag 1 is put into the grinding gap 14, and by the biting movement of the grinding members 11 and 12, the molten slag 1 is compressed, crushed, and ground to form the lower opening. However, the feeder 16 suppresses the discharge from the lower opening 15, and the grinding members 11, 12
In addition, the molten slag 1 is allowed to stagnate between the grinding gaps 14 and 14, and is discharged from the feeder 16 outlet via the feeder 16. The flow is formed into a continuous extrusion flow, promoting grinding between the molten slags and performing preferential grinding, and since the slag is ground preferentially compared to the base metal, it adheres to the base metal. During the grinding process, the slag is gradually peeled off and separated into individual units, exhibiting an aggregated state of both, and the slag is refined. Next, the ground dissolved slag 4 is supplied to a sieving machine 5, and the products on the sieve are separated as ingots 6, and the products under the sieve are separated as slag 7, so that the ingots 6 from the molten slag 1 can be recovered. The table below shows a comparison of data from experimental examples based on the above examples and data obtained by grinding using a rod mill.

〔Effect of the invention〕

As is clear from the above-mentioned embodiments, in the process from when the molten slag is introduced into the gap between the oscillating grinding members of the oscillating grinder until it is discharged through the feeder, the molten slag is removed from the bottom opening. The metal is discharged from the metal to a feeder, deposited on the top surface of the feeder, and preferentially crushed so that it is stagnated in the grinding gap, thereby separating the metal into individual pieces.In addition, even the finest metal can be recovered, improving recovery efficiency. It has great effects, such as being able to recover high-quality ingots, and requiring less power for grinding.

[Brief explanation of drawings]

FIG. 1 is a schematic flowchart of a method for recovering ingots using molten aluminum alloy slag according to an embodiment of the present invention, and FIG. 2 is a schematic flowchart of a conventional method for recovering ingots using molten aluminum alloy slag. 1...Dissolved slag, 6...Bullion, 7...Slag, 10
... Oscillating grinding machine, 11, 12... Oscillating grinding member, 14
... Grinding gap, 15... Lower opening, 16... Feeder.

Claims (1)

[Claims] 1. 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 passed through the feeder from the lower opening. Aluminum molten slag is discharged in communication with the feeder, is deposited on the upper surface of the feeder, and subjected to preferential grinding so as to be stagnated in the grinding gap to separate the base metal and the slag. Bullion recovery method.