CN114293021A - Aluminum type melt purification process - Google Patents
Aluminum type melt purification process Download PDFInfo
- Publication number
- CN114293021A CN114293021A CN202111550600.1A CN202111550600A CN114293021A CN 114293021 A CN114293021 A CN 114293021A CN 202111550600 A CN202111550600 A CN 202111550600A CN 114293021 A CN114293021 A CN 114293021A
- Authority
- CN
- China
- Prior art keywords
- melt
- degassing
- aluminum
- flux
- purification process
- 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
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an aluminum type melt purification process, which comprises the following steps: s1: adding an aluminum alloy raw material into a refining furnace, and heating to obtain an aluminum type melt; s2: pouring the aluminum type melt obtained after the aluminum type melt is completely melted in the S1 into a first filtering device, and preliminarily removing inclusion particles in the melt; s3: introducing the melt subjected to primary impurity removal in the step S2 into a degassing device, wherein the inside of the degassing device is in a sealed vacuum-pumping state; s4: adding a degassing flux into a degassing device by adopting an Alpur method, wherein the degassing flux is used for removing gas in a melt; s5: filtering the melt after exhausting in the S4 for the second time; s6: and obtaining the final purified aluminum type melt. The invention adopts the Alpur method to remove the hydrogen in the melt, can obtain the melt with higher purity, and has simple structure and low cost of degassing equipment; the active carbon layer is arranged to adsorb harmful parts in other extracted parts so as to prevent harmful gas from polluting the environment and protect the safety of workers.
Description
Technical Field
The invention relates to the technical field of melt purification, in particular to an aluminum type melt purification process.
Background
There are many methods for classifying aluminum alloy melt purification, and the method is generally classified according to the following three methods: according to the existence of chemical reaction in the degassing process, the degassing can be divided into non-chemical reaction degassing, chemical reaction degassing and mixed degassing; the purification can be divided into the purification inside the furnace and the purification outside the furnace according to the purification position; the method can be divided into adsorption refining and non-adsorption refining according to the action mechanism. Wherein the adsorption refining depends on the refining agent to generate the function of adsorbing the oxide inclusion and simultaneously remove the oxide inclusion and the hydrogen attached to the surface of the oxide inclusion, thereby achieving the purpose of purifying the aluminum liquid. Refining only occurs at the adsorption interface. Specifically, the method may be classified into a floating method, a solvent method, a filtration method, and the like. While refining methods relying on other physical effects are collectively referred to as non-adsorptive refining. It is characterized in that all the aluminum liquid is refined at the same time. The non-adsorption refining comprises vacuum refining, ultrasonic refining, pre-solidification degassing method and the like.
External furnace cleaning, including glass fiber cloth filtration, is widely used abroad, but glass fiber cloth can only remove large-sized inclusions, is ineffective for tiny inclusions and can only be used once.
The invention patent application with the application number of CN201610390461.3 provides a method for filtering and compositely removing impurities in aluminum and aluminum alloy melt by supergravity, wherein the aluminum alloy is heated to 700-750 ℃ in a supergravity equipment heating furnace to be completely melted; the method has the advantages that after the aluminum melt is completely melted, filtration and purification treatment are carried out in a high-gravity field, non-metal inclusions and impurity elements can be thoroughly separated from the inside of the melt, so that the purpose of purifying the aluminum alloy melt is achieved, the rapid removal of the non-metal inclusions and the impurity elements in the aluminum and aluminum alloy melt is realized by utilizing a high-gravity filtration composite purification method, the cleanliness of the aluminum melt is remarkably improved, and compared with common filtration in actual production, a filter with smaller aperture can be adopted in the high-gravity field, and further, the inclusions with smaller size can be removed, the filtration rate of the melt cannot be influenced, but the method is too high in cost and is not suitable for purifying a large amount of aluminum type melts.
In recent years, with the continuous progress of melt purification technology, many novel and efficient melt purification processes, such as a rotary pulse blowing process, an electromagnetic purification process, a vacuum purification treatment process, an ultrasonic purification treatment process, a multifunctional flux purification process and the like, are rapidly developed.
However, vacuum cleaning, ultrasonic cleaning, and other non-adsorption cleaning methods have not been widely used in industry because the cleaning effect is not good, or because the equipment and process are complicated and the cost is high. Furthermore, it is difficult to achieve a single refining process that is both capable of degassing and removing inclusions efficiently. The degassing effect of the vacuum purification treatment is good, but the effect of removing the inclusions is not ideal; the filtering method has obvious effect of removing the inclusions, but has poor degassing effect. If the two effects of degassing and removing impurities are good at the same time, a composite refining technology is preferably adopted. Therefore, the development of a composite refining process which is low in cost, efficient and environment-friendly and has the functions of degassing and impurity removal becomes the focus of research on the aspect of aluminum alloy melt purification.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an aluminum type melt purification process which is used for solving the technical problems that in the prior art, glass fiber cloth can only remove impurities with larger sizes, small impurities are ineffective and can only be used once, and a method for compositely removing impurities in aluminum and aluminum alloy melts by supergravity filtration can remove smaller impurities but is high in manufacturing cost.
The purpose of the invention is realized by the following technical scheme:
an aluminum-type melt purification process, comprising the steps of:
s1: adding an aluminum alloy raw material into a refining furnace, and heating to obtain an aluminum type melt;
s2: pouring the aluminum type melt obtained after the aluminum type melt is completely melted in the S1 into a first filtering device, and preliminarily removing inclusion particles in the melt;
s3: introducing the melt subjected to primary impurity removal in the step S2 into a degassing device, wherein the inside of the degassing device is in a sealed vacuum-pumping state;
s4: adding a degassing flux into a degassing device by adopting an Alpur method, wherein the degassing flux is used for removing gas in a melt;
s5: filtering the melt after exhausting in the S4 for the second time;
s6: and obtaining the final purified aluminum type melt.
Further, in the step S1, the aluminum alloy raw material is heated to 720-770 ℃ to prepare the aluminum alloy melt.
Further, in S2, the first filtering device is a glass cloth, and the first filtering device is disposed above the degassing device.
Further, the glass fiber cloth size is 1.8mm 0.9mm 3.0 mm.
Further, the degassing flux in S4 is an inert gas, and the inert gas is a mixed gas of argon and chlorine, wherein the ratio of argon to chlorine is 200: 4.
Further, the S4 specifically includes the following sub-steps:
s41: spraying degassing flux by using a high-pressure rotating nozzle, and dispersing the degassing flux into the melt;
s42: the high-pressure rotating nozzle is provided with an air injection pressure measurement and control unit for monitoring the flow rate of the degassing flux and the nozzle pressure;
s43: fully stirring the melt added with the dust removal flux to ensure that the dust removal flux is fully contacted with the melt and the impurity gas is released;
s44: the vacuum-pumping treatment is carried out to extract the gas in the degassing device.
Furthermore, in S44, an activated carbon layer is further disposed to adsorb harmful components in the extracted gas.
Further, the S5 further includes the following sub-steps:
s51: enabling the melt subjected to degassing treatment to flow into a second filtering device from top to bottom;
s52: controlling the flow rate of the melt through an electric valve arranged on the second filtering device;
s53: and carrying out secondary filtration on the melt through a second filtering device to remove fine impurities in the melt.
Furthermore, the second filter device is a foamed ceramic filter plate, the thickness of the foamed ceramic filter plate is 50-70mm, the length is 400-800mm, and the width is 300-800 mm.
The invention has the beneficial effects that:
(1) the problem that glass fiber cloth can only remove impurities with larger sizes and is ineffective for tiny impurities in the prior art is solved, and the impurities in the melt are removed more thoroughly by arranging the second filtering device;
(2) compared with the method for removing impurities in aluminum and aluminum alloy melt by supergravity filtration, the method has the advantages that the manufacturing cost is lower, the service life of the ceramic tube can be prolonged by about 500 tons of aluminum liquid, and the method is suitable for industrial large-scale aluminum alloy melt purification process;
(3) the Alpur method is adopted to remove the hydrogen in the melt, so that the melt with higher purity can be obtained, and the degassing equipment has simple structure and low cost;
(4) the active carbon layer is arranged to adsorb harmful parts in other extracted parts so as to prevent harmful gas from polluting the environment and protect the safety of workers.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic overall flow diagram of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to clearly understand the technical features, objects and effects of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In recent years, with the continuous progress of melt purification technology, many novel and efficient melt purification processes, such as a rotary pulse blowing process, an electromagnetic purification process, a vacuum purification treatment process, an ultrasonic purification treatment process, a multifunctional flux purification process and the like, are rapidly developed.
However, vacuum cleaning, ultrasonic cleaning, and other non-adsorption cleaning methods have not been widely used in industry because the cleaning effect is not good, or because the equipment and process are complicated and the cost is high. Furthermore, it is difficult to achieve a single refining process that is both capable of degassing and removing inclusions efficiently. The degassing effect of the vacuum purification treatment is good, but the effect of removing the inclusions is not ideal; the filtering method has obvious effect of removing the inclusions, but has poor degassing effect. If the two effects of degassing and removing impurities are good at the same time, a composite refining technology is preferably adopted. Therefore, the development of a composite refining process which is low in cost, efficient and environment-friendly and has the functions of degassing and impurity removal becomes the focus of research on the aspect of aluminum alloy melt purification.
In order to solve the problems, a composite refining process which is low in cost, efficient and environment-friendly and simultaneously has the functions of degassing and impurity removal is developed, and an aluminum type melt purification process is particularly provided.
For ease of understanding, the following specific examples are set forth:
example 1:
in this example, as shown in fig. 1, an aluminum-type melt purging process includes the steps of:
s1: adding an aluminum alloy raw material into a refining furnace, and heating to obtain an aluminum type melt;
s2: pouring the aluminum type melt obtained after the aluminum type melt is completely melted in the S1 into a first filtering device, and preliminarily removing inclusion particles in the melt;
s3: introducing the melt subjected to primary impurity removal in the step S2 into a degassing device, wherein the inside of the degassing device is in a sealed vacuum-pumping state;
s4: adding a degassing flux into a degassing device by adopting an Alpur method, wherein the degassing flux is used for removing gas in a melt;
s5: filtering the melt after exhausting in the S4 for the second time;
s6: and obtaining the final purified aluminum type melt.
In this embodiment, in S1, the aluminum alloy raw material is heated to 720 ℃ to 770 ℃ to form an aluminum alloy melt.
In this embodiment, in S2, the first filtering device is a glass cloth, and the first filtering device is disposed above the degassing device.
In this example, the glass fiber cloth size was 1.8mm 0.9mm 3.0 mm.
In this embodiment, the degassing flux in S4 is an inert gas, and the inert gas is a mixed gas of argon and chlorine, wherein the ratio of argon to chlorine is 200: 4.
In this embodiment, the S4 specifically includes the following sub-steps:
s41: spraying degassing flux by using a high-pressure rotating nozzle, and dispersing the degassing flux into the melt;
s42: the high-pressure rotating nozzle is provided with an air injection pressure measurement and control unit for monitoring the flow rate of the degassing flux and the nozzle pressure;
s43: fully stirring the melt added with the dust removal flux to ensure that the dust removal flux is fully contacted with the melt and the impurity gas is released;
s44: the vacuum-pumping treatment is carried out to extract the gas in the degassing device.
In this embodiment, in S44, an activated carbon layer is further disposed to adsorb harmful components in the extracted gas.
In this embodiment, the S5 further includes the following sub-steps:
s51: enabling the melt subjected to degassing treatment to flow into a second filtering device from top to bottom;
s52: controlling the flow rate of the melt through an electric valve arranged on the second filtering device;
s53: and carrying out secondary filtration on the melt through a second filtering device to remove fine impurities in the melt.
In this embodiment, the second filtering device is a ceramic foam filtering plate, the thickness of the ceramic foam filtering plate is 50-70mm, the length is 400-800mm, and the width is 300-800 mm.
The invention solves the problems that glass fiber cloth can only remove large-size impurities and is ineffective to tiny impurities in the prior art, and the second filtering device is arranged to more thoroughly remove impurities in the melt; compared with the method for removing impurities in aluminum and aluminum alloy melt by supergravity filtration, the method has the advantages that the manufacturing cost is lower, the service life of the ceramic tube can be prolonged by about 500 tons of aluminum liquid, and the method is suitable for industrial large-scale aluminum alloy melt purification process; the Alpur method is adopted to remove the hydrogen in the melt, so that the melt with higher purity can be obtained, and the degassing equipment has simple structure and low cost; the active carbon layer is arranged to adsorb harmful parts in other extracted parts so as to prevent harmful gas from polluting the environment and protect the safety of workers.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. An aluminum type melt purification process, characterized in that the purification process comprises the steps of:
s1: adding an aluminum alloy raw material into a refining furnace, and heating to obtain an aluminum type melt;
s2: pouring the aluminum type melt obtained after the aluminum type melt is completely melted in the S1 into a first filtering device, and preliminarily removing inclusion particles in the melt;
s3: introducing the melt subjected to primary impurity removal in the step S2 into a degassing device, wherein the inside of the degassing device is in a sealed vacuum-pumping state;
s4: adding a degassing flux into a degassing device by adopting an Alpur method, wherein the degassing flux is used for removing gas in a melt;
s5: filtering the melt after exhausting in the S4 for the second time;
s6: and obtaining the final purified aluminum type melt.
2. The process of claim 1, wherein in S1, the aluminum alloy raw material is heated to 720-770 ℃ to form the aluminum alloy melt.
3. The process of claim 1, wherein the first filtering device in S2 is a glass cloth, and the first filtering device is disposed above the degassing device.
4. An aluminum-based melt purification process as recited in claim 3, wherein said glass fiber cloth size is 1.8mm x 0.9mm x 3.0 mm.
5. The process of claim 1, wherein the degassing flux in S4 is an inert gas, and the inert gas is a mixed gas of argon and chlorine, wherein the ratio of argon to chlorine is 200: 4.
6. An aluminum-type melt purification process as claimed in claim 1, wherein said S4 comprises the following sub-steps:
s41: spraying degassing flux by using a high-pressure rotating nozzle, and dispersing the degassing flux into the melt;
s42: the high-pressure rotating nozzle is provided with an air injection pressure measurement and control unit for monitoring the flow rate of the degassing flux and the nozzle pressure;
s43: fully stirring the melt added with the dust removal flux to ensure that the dust removal flux is fully contacted with the melt and the impurity gas is released;
s44: the vacuum-pumping treatment is carried out to extract the gas in the degassing device.
7. An aluminum-based melt purification process as claimed in claim 6, wherein said step S44 further comprises disposing an activated carbon layer for adsorbing harmful components of the extracted gas.
8. An aluminum-type melt purification process as recited in claim 1, wherein said S5 further comprises the substeps of:
s51: enabling the melt subjected to degassing treatment to flow into a second filtering device from top to bottom;
s52: controlling the flow rate of the melt through an electric valve arranged on the second filtering device;
s53: and carrying out secondary filtration on the melt through a second filtering device to remove fine impurities in the melt.
9. The process of claim 8, wherein the second filter device is a ceramic foam filter plate, the ceramic foam filter plate has a thickness of 50-70mm, a length of 400-800mm and a width of 300-800 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111550600.1A CN114293021A (en) | 2021-12-17 | 2021-12-17 | Aluminum type melt purification process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111550600.1A CN114293021A (en) | 2021-12-17 | 2021-12-17 | Aluminum type melt purification process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114293021A true CN114293021A (en) | 2022-04-08 |
Family
ID=80968161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111550600.1A Pending CN114293021A (en) | 2021-12-17 | 2021-12-17 | Aluminum type melt purification process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114293021A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067731A (en) * | 1975-07-18 | 1978-01-10 | Southwire Company | Method of treating molten metal |
| US4158632A (en) * | 1978-04-26 | 1979-06-19 | Swiss Aluminium Ltd. | Filter for use in filtration of molten metal |
| CN1379117A (en) * | 2002-01-22 | 2002-11-13 | 上海交通大学 | Process for cleaning molten metal and alloy |
| CN201607123U (en) * | 2010-01-13 | 2010-10-13 | 福建工程学院 | Smelting furnace with integration of multiple functions |
| CN106399716A (en) * | 2016-10-24 | 2017-02-15 | 百色学院 | Compound purification device for aluminum melt |
| CN107841642A (en) * | 2017-12-23 | 2018-03-27 | 无锡新区鸿声铝品有限公司 | A kind of new purifying aluminium alloy melt device |
-
2021
- 2021-12-17 CN CN202111550600.1A patent/CN114293021A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067731A (en) * | 1975-07-18 | 1978-01-10 | Southwire Company | Method of treating molten metal |
| US4158632A (en) * | 1978-04-26 | 1979-06-19 | Swiss Aluminium Ltd. | Filter for use in filtration of molten metal |
| CN1379117A (en) * | 2002-01-22 | 2002-11-13 | 上海交通大学 | Process for cleaning molten metal and alloy |
| CN201607123U (en) * | 2010-01-13 | 2010-10-13 | 福建工程学院 | Smelting furnace with integration of multiple functions |
| CN106399716A (en) * | 2016-10-24 | 2017-02-15 | 百色学院 | Compound purification device for aluminum melt |
| CN107841642A (en) * | 2017-12-23 | 2018-03-27 | 无锡新区鸿声铝品有限公司 | A kind of new purifying aluminium alloy melt device |
Non-Patent Citations (1)
| Title |
|---|
| 黎文献: "有色金属材料工程概论", 冶金工业出版社, pages: 201 - 202 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106086445B (en) | A kind of cleaning molten method of oxygen-free copper bar | |
| JP5032223B2 (en) | Method for cleaning polysilicon crushed material | |
| CN101871052B (en) | Method for purifying aluminum and aluminum alloy melt | |
| CN105779770B (en) | Method for recycling valuable metal in waste circuit board | |
| KR20130057490A (en) | Method for recycling noble metal from electronic waste material and apparatus thereof | |
| CN104831071A (en) | Method for recovering platinum and palladium from waste carrier catalyst by hydrothermal method | |
| CN104120444A (en) | Process for recovering metallic lead from waste lead-contained glass by adopting mechanical activation reduction method | |
| CN107601498B (en) | Purification method of diamond micro powder | |
| CN106086462B (en) | A kind of melt combined purifying method for being applicable in up-drawing method and preparing oxygen-free copper bar | |
| CN109321764A (en) | A method of the Ti recovery from germanic zinc oxide fumes | |
| CN114293021A (en) | Aluminum type melt purification process | |
| CN106756010A (en) | The method that fluorine in solution of zinc sulfate is removed after the roasting of zinc metallurgy white residue | |
| CN107988491B (en) | Oxygen-free copper production process | |
| CN102471925B (en) | Silicon oxide removal apparatus, and inert gas collection facility for silicon monocrystal production apparatus | |
| CN113072081A (en) | Impurity removal process for lithium sulfate purification completion liquid | |
| CN108101357A (en) | A kind of quartz sand oxalic acid remove iron after saliferous give up oxalic acid water processing and reuse method | |
| JP5651544B2 (en) | Method for recovering indium tin oxide and method for producing indium tin oxide target | |
| JP2008073619A (en) | Method of treating liquid crystal panel | |
| CN114349001A (en) | Purification treatment method of diamond micro powder prepared by mechanical crushing method | |
| CN109182747A (en) | A kind of tungsten ore smelting impurity removal process | |
| CN111926199B (en) | Pre-smelting process of electrolytic aluminum liquid | |
| CN102875355B (en) | Purification method of cobalt acetate | |
| CN112520733A (en) | Chemical purification method for graphite | |
| CN111252769A (en) | Preparation method of solar polycrystalline silicon | |
| CN108165757A (en) | A kind of modified molten non-ferrous metal purifier and purification method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |