CN113061747A - Process for reducing dross on surface of smelted aluminum ingot - Google Patents
Process for reducing dross on surface of smelted aluminum ingot Download PDFInfo
- Publication number
- CN113061747A CN113061747A CN202110289755.8A CN202110289755A CN113061747A CN 113061747 A CN113061747 A CN 113061747A CN 202110289755 A CN202110289755 A CN 202110289755A CN 113061747 A CN113061747 A CN 113061747A
- Authority
- CN
- China
- Prior art keywords
- slagging
- aluminum
- aluminum liquid
- slag
- smelting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000003723 Smelting Methods 0.000 claims abstract description 27
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 230000007306 turnover Effects 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- -1 moisture Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/001—Retaining slag during pouring molten metal
- B22D43/004—Retaining slag during pouring molten metal by using filtering means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/005—Removing slag from a molten metal surface
- B22D43/007—Removing slag from a molten metal surface by using scrapers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/066—Treatment of circulating aluminium, e.g. by filtration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a process for reducing dross on the surface of a smelted aluminum ingot, which comprises the steps of cleaning a smelting furnace, and cleaning impurities such as moisture, oil stain and the like in smelting; cleaning raw materials and drying; putting the aluminum material into a smelting furnace for heating and melting, and heating to 700-710 ℃ to obtain aluminum liquid; slagging off; and filtering, namely filtering the aluminum liquid when the aluminum liquid after slagging off is taken. The invention carries out slag removal by a three-step method, firstly, the smelting furnace and materials are cleaned, and the generation of scum is reduced fundamentally from the generation of scum; secondly, the slag removing structure is improved, the slag removing mechanism moves up and down in the molten aluminum and rotates, so that not only is the stirring effect achieved, but also the floating slag can float above the slag removing colander, and the floating slag can be removed once when the slag removing colander is lifted; and finally, filtering the aluminum liquid once again when the aluminum liquid is discharged, ensuring that the scum in the aluminum liquid is completely removed, and reducing the scum of aluminum ingot smelting to the maximum extent through the three steps.
Description
Technical Field
The invention relates to a process for smelting an aluminum ingot, in particular to a process for reducing dross on the surface of the smelted aluminum ingot.
Background
The scum is generated during smelting mainly because the furnace burden or tools are not clean, impurities such as moisture, oil stains and the like are adhered on the furnace burden or tools, and the moisture and the oil stains are oxidized in aluminum liquid to form oxidized impurities. Because the density is lower, the aluminum alloy floats on the liquid surface of the aluminum alloy and becomes scum. At present, manual slag skimming is often adopted, the risk coefficient of the manual slag skimming is too high, scalding accidents are easy to occur, and the efficiency is low; some factories remove slag through the mechanical arm, but the slag removing mechanical arm disclosed in the prior art has low efficiency, incomplete slag removing, repeated operation, low efficiency and high cost.
Disclosure of Invention
The invention discloses a process for reducing dross on the surface of a smelted aluminum ingot, which solves the problems in the background art.
In order to solve the technical problems, the invention specifically adopts the following technical scheme:
a process for reducing dross on the surface of a smelted aluminum ingot comprises the following steps,
cleaning a smelting furnace, and cleaning impurities such as water, oil stain and the like in the smelting;
b, cleaning the raw materials and drying;
c, putting the aluminum material into a smelting furnace for heating and smelting, and heating to 700-710 ℃ to obtain aluminum liquid;
d, slagging off, namely installing a slagging-off mechanism with the following structure above the smelting furnace to carry out slagging off, wherein the slagging-off mechanism comprises a lifting mechanism, connecting arms arranged on the lifting mechanism and slagging-off colanders arranged at the bottom end parts of the connecting arms, two sets of the lifting mechanism and the connecting arms are arranged, one of the two connecting arms is connected with one slagging-off colander, and the two slagging-off colanders can surround a spherical slagging-off colander;
and E, filtering, namely filtering the aluminum liquid when the aluminum liquid after slagging-off is taken.
Preferably, the lifting mechanism comprises a sliding rail and a sliding seat, a lifting cylinder is arranged at the end part of the sliding rail, and the sliding seat is driven by the cylinder to slide along the sliding rail; the connecting arm is connected to the sliding seat.
Preferably, the downward probing depth of the slag removing colander which extends later is smaller than that of the slag removing colander which extends earlier, and the highest height of the slag removing colander which rises when moving up and down is lower than the surface of the aluminum liquid.
Preferably, when moving up and down, a slag striking agent is thrown into the aluminum liquid, and inert gas is introduced at the same time.
Preferably, calcium fluoride is added into the aluminum liquid as a refining agent during the up-and-down movement.
Preferably, the top of the slag-raking strainer is hinged with a circle of arc-shaped turnover plate, the turnover angle of the turnover plate is 0-90 degrees, and the turnover plate is of a segment-shaped structure.
Compared with the prior art, the invention has the following beneficial effects:
the invention carries out slag removal by a three-step method, firstly, the smelting furnace and materials are cleaned, and the generation of scum is reduced fundamentally from the generation of scum; secondly, the slag removing structure is improved, the slag removing mechanism moves up and down in the molten aluminum and rotates, so that not only is the stirring effect achieved, but also the floating slag can float above the slag removing colander, and the floating slag can be removed once when the slag removing colander is lifted; and finally, filtering the aluminum liquid once again when the aluminum liquid is discharged, ensuring that the scum in the aluminum liquid is completely removed, and reducing the scum of aluminum ingot smelting to the maximum extent through the three steps.
Drawings
Fig. 1 is a schematic structural diagram of a slag raking mechanism.
Fig. 2 is a top view of the slag removing colander.
In the figure: 1-lifting mechanism, 2-connecting arm, 21-connecting arm connecting position, 3-slag removing colander, 4-smelting furnace and 5-turnover plate.
Detailed Description
The details of the present invention will be described below with reference to the accompanying drawings and examples.
As shown in fig. 1-2, to solve the above technical problem, the present invention specifically adopts the following technical solutions:
a process for reducing dross on the surface of a smelted aluminum ingot comprises the following steps,
a, cleaning a smelting furnace 4, and cleaning impurities such as water, oil stain and the like in the smelting;
b, cleaning the raw materials and drying;
c, putting the aluminum material into a smelting furnace 4 for heating and smelting, and heating to 700 and 710 ℃ to obtain aluminum liquid;
d, slagging-off, wherein a slagging-off mechanism with the following structure is arranged above the smelting furnace 4 for slagging-off, the slagging-off mechanism 1 comprises a lifting mechanism 1, a connecting arm 2 arranged on the lifting mechanism 1 and a slagging-off colander 3 arranged at the bottom end part of the connecting arm 2, the lifting mechanism 1 and the connecting arm 2 are respectively provided with two sets, the two connecting arms 2 are respectively connected with one slagging-off colander 3, the two slagging-off colanders 3 can form a spherical slagging-off colander, when in work, one of the slag-off colander 3 is driven by the lifting mechanism to extend into the smelting furnace 4 and move up and down in the aluminum liquid for 3 to 10 times, and then extend into the deep part of the aluminum liquid, the other slag skimming colander 3 extends into the aluminum liquid to move up and down for 3-10 times, and finally, the two colanders are adjusted to the same height and synchronously ascend to the outside of the aluminum liquid to remove floating slag at the top of the aluminum liquid, wherein the slag skimming colander covers the whole mouth of the smelting furnace 4;
and E, filtering, namely filtering the aluminum liquid when the aluminum liquid after slagging-off is taken.
Preferably, the lifting mechanism 1 comprises a slide rail and a slide seat, wherein a lifting cylinder is arranged at the end part of the slide rail, and the slide seat is driven by the cylinder to slide along the slide rail; the connecting arm 2 is connected to the slide.
Preferably, the downward depth of the slag-raking strainer 3 extending into the slag-raking strainer 3 is smaller than that of the slag-raking strainer 3 extending into the slag-raking strainer 3, and the highest height of the slag-raking strainer 3 rising up and down is lower than the surface of the molten aluminum.
Preferably, when the slag removing colander 3 moves up and down, a slag removing agent is added into the aluminum liquid, and meanwhile, inert gas is introduced.
Preferably, when the slag removing colander 3 moves up and down, calcium fluoride is added into the molten aluminum as a refining agent.
Preferably, the top of the slag-raking strainer 3 is hinged with a circle of arc-shaped turnover plates 5, the turnover angle of the turnover plates 5 is 0-90 degrees, the turnover plates 5 are of a segment-shaped structure, and all the segments are hinged to the top of the slag-raking strainer 3 through hinged parts. The scum accumulation at the periphery of the slag removing spoon can be avoided.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. A process for reducing dross on the surface of a smelted aluminum ingot is characterized by comprising the following steps,
cleaning a smelting furnace, and cleaning impurities such as water, oil stain and the like in the smelting;
b, cleaning the raw materials and drying;
c, putting the aluminum material into a smelting furnace for heating and smelting, and heating to 700-710 ℃ to obtain aluminum liquid;
d, slagging off, namely installing a slagging-off mechanism with the following structure above the smelting furnace to carry out slagging off, wherein the slagging-off mechanism comprises a lifting mechanism, connecting arms arranged on the lifting mechanism and slagging-off colanders arranged at the bottom end parts of the connecting arms, two sets of the lifting mechanism and the connecting arms are arranged, one of the two connecting arms is connected with one slagging-off colander, and the two slagging-off colanders can surround a spherical slagging-off colander;
and E, filtering, namely filtering the aluminum liquid when the aluminum liquid after slagging-off is taken.
2. The process of claim 1, wherein the reducing dross on the surface of the ingot comprises: the lifting mechanism comprises a slide rail and a slide seat, wherein a lifting cylinder is arranged at the end part of the slide rail, and the slide seat is driven by the cylinder to slide along the slide rail; the connecting arm is connected to the sliding seat.
3. The process of claim 1, wherein the reducing dross on the surface of the ingot comprises: the downward detection depth of the later-inserted slagging strainer is smaller than that of the first-inserted slagging strainer, and the highest height of the slagging strainer which rises when moving up and down is lower than the surface of the aluminum liquid.
4. A process for reducing dross on a surface of a molten aluminum ingot as recited in claim 3, wherein: when moving up and down, a slag striking agent is thrown into the aluminum liquid, and inert gas is introduced at the same time.
5. A process for reducing dross on a surface of a molten aluminum ingot as recited in claim 3, wherein: when moving up and down, calcium fluoride is added into the aluminum liquid as a refining agent.
6. The process of claim 1, wherein the reducing dross on the surface of the ingot comprises: the top of the slag-raking strainer is hinged with a circle of arc-shaped turnover plate, the turnover angle of the turnover plate is 0-90 degrees, and the turnover plate is of a segment-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289755.8A CN113061747A (en) | 2021-03-16 | 2021-03-16 | Process for reducing dross on surface of smelted aluminum ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289755.8A CN113061747A (en) | 2021-03-16 | 2021-03-16 | Process for reducing dross on surface of smelted aluminum ingot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113061747A true CN113061747A (en) | 2021-07-02 |
Family
ID=76561568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110289755.8A Pending CN113061747A (en) | 2021-03-16 | 2021-03-16 | Process for reducing dross on surface of smelted aluminum ingot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113061747A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2611915A1 (en) * | 1976-03-20 | 1977-09-22 | Uwe Kochanneck | Slag deflector immersed in molten metal - to displace surface slag before a pipe is immersed in the metal |
| CN201592253U (en) * | 2009-12-30 | 2010-09-29 | 运城市关铝设备材料有限公司 | Device for separating aluminum ash in smelter |
| CN105728707A (en) * | 2016-04-14 | 2016-07-06 | 重庆旗能电铝有限公司 | Electrolytic aluminum liquid slag removing machine |
| KR20160119414A (en) * | 2015-04-03 | 2016-10-13 | 유승진 | Ladle |
| CN110468288A (en) * | 2019-09-25 | 2019-11-19 | 杨佳志 | A kind of device for removing slag for aluminum anodizing |
| CN110976840A (en) * | 2019-09-10 | 2020-04-10 | 山东南山铝业股份有限公司 | Full-automatic slag removing device for aluminum slag of continuous casting unit |
-
2021
- 2021-03-16 CN CN202110289755.8A patent/CN113061747A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2611915A1 (en) * | 1976-03-20 | 1977-09-22 | Uwe Kochanneck | Slag deflector immersed in molten metal - to displace surface slag before a pipe is immersed in the metal |
| CN201592253U (en) * | 2009-12-30 | 2010-09-29 | 运城市关铝设备材料有限公司 | Device for separating aluminum ash in smelter |
| KR20160119414A (en) * | 2015-04-03 | 2016-10-13 | 유승진 | Ladle |
| CN105728707A (en) * | 2016-04-14 | 2016-07-06 | 重庆旗能电铝有限公司 | Electrolytic aluminum liquid slag removing machine |
| CN110976840A (en) * | 2019-09-10 | 2020-04-10 | 山东南山铝业股份有限公司 | Full-automatic slag removing device for aluminum slag of continuous casting unit |
| CN110468288A (en) * | 2019-09-25 | 2019-11-19 | 杨佳志 | A kind of device for removing slag for aluminum anodizing |
Non-Patent Citations (1)
| Title |
|---|
| 吴鸿等: "《铝电解工 下》", 31 December 2006, 贵州科学技术出版社 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20210702 |