# US 2014/0196573 A1 · Recycling method for aluminum dust collection and aluminum metallic smelting slag

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- Number: US 2014/0196573 A1
- Document ID: US20140196573A1
- Status: Published application
- Kind: A1
- Application number: 14/147,855
- Filed: 2014-01-06
- Published: 2014-07-17
- Earliest claimed: 2013-01-11
- Assignees: Jia xie metal Co., Ltd.
- Applicants: Jia xie metal Co., Ltd.
- Inventors: Shih-Chien Chiang; Ya-Ping Liu
- Web page: https://patentgrep.com/patent/US20140196573A1

## CPC

- C22B 1/16: Sintering; Agglomerating
- C22B 1/248: of metal scrap or alloys
- C22B 21/0007: {Preliminary treatment of ores or scrap or any other metal source (Bayer processes C01F)}
- Y02P 10/20: Recycling
- Y02W 30/50: Reuse, recycling or recovery technologies
- C22B: PRODUCTION AND REFINING OF METALS (electrolytic C25); PRETREATMENT OF RAW MATERIALS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

The present invention is a recycling method for aluminum dust collection and aluminum metallic smelting slag, where aluminum dross is processed into dross pellets having a particle diameter of larger than 200 meshes and smaller than 400 meshed, with which an aqueous solution of a binder is mixed to form a raw material. The raw material is then pressure molded to form a raw refractory material and sintered under a work temperature of 1050° C.˜1450° C., and reduced in temperature to finally form a refractory material.

## Claims

### Claim 1

A recycling method for aluminum dust collection and aluminum metal smelting slag, comprising steps of:
(a) processing an aluminum dross into a plurality of dross pellets;
(b) enabling each of the plurality of dross pellets to have a particle diameter of large than 200 meshes and smaller than 400 meshes;
(c) mixing the dross pellets in the step (b) with an aqueous solution of a binder to form a raw material;
(d) pressure molding the raw material to form a raw refractory material; and
(e) sintering the raw refractory material at a work temperature of from 1050° C. to 1450° C., and reducing the temperature of the sintered refractory material to form a refractory material.

### Claim 2 (depends on 1)

The recycling method as claimed in claim 1, wherein the step (b) further comprises a step (b1) of performing a nitrogen-containing examination process to ascertain that each of the plurality of dross pellets has a nitrogen containing amount of between 4,400 ppm and 7,000 ppm.

### Claim 3 (depends on 1)

The recycling method as claimed in claim 1, wherein the aqueous solution of the binder is a mixed solution of carboxymethyl cellulose and water, the binder having a containing amount in the aqueous solution of between 3 wt % and 12 wt %.

### Claim 4 (depends on 1)

The recycling method as claimed in claim 1, wherein the step (d) is performed under a pressure of between 25 tons and 250 tons.