CN115125407A - Production method of circulating grade-maintaining 5-series food can material - Google Patents

Production method of circulating grade-maintaining 5-series food can material Download PDF

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Publication number
CN115125407A
CN115125407A CN202210965601.0A CN202210965601A CN115125407A CN 115125407 A CN115125407 A CN 115125407A CN 202210965601 A CN202210965601 A CN 202210965601A CN 115125407 A CN115125407 A CN 115125407A
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waste
food
grade
circulating
temperature
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Inventor
杨立民
隋信栋
顾华锋
张华�
孟双
于宏
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Longkou Nanshan Aluminum Rolling New Material Co ltd
Yantai Donghai Aluminum Foil Co ltd
Yantai Nanshan Aluminum New Material Co ltd
Shandong Nanshan Aluminium Co Ltd
Original Assignee
Longkou Nanshan Aluminum Rolling New Material Co ltd
Yantai Donghai Aluminum Foil Co ltd
Yantai Nanshan Aluminum New Material Co ltd
Shandong Nanshan Aluminium Co Ltd
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Priority to CN202210965601.0A priority Critical patent/CN115125407A/en
Publication of CN115125407A publication Critical patent/CN115125407A/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/02Making non-ferrous alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00Obtaining aluminium
    • C22B21/06Obtaining aluminium refining
    • C22B21/066Treatment of circulating aluminium, e.g. by filtration
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A production method of a circulating grade-keeping 5-series food can material belongs to the field of metal packaging processing in the aluminum processing industry, and comprises the following steps: the method comprises the following steps: adding the food can waste into a waste treatment system for melting; step two: using an element remover according to the detected chemical composition result; step three: transferring the molten aluminum into a smelting furnace; step four: the smelting furnace is prepared according to the chemical composition proportion of a 5-series screw-off cover; step five: transferring the qualified aluminum liquid into a heat preservation furnace for refining; step six: carrying out online deslagging, degassing, filtering treatment and large slab ingot casting; step seven: milling the surface of a large flat ingot; step eight: homogenizing the large flat ingot; step nine: hot rolling; step ten: cold rolling; step eleven: and finishing and warehousing. The invention recycles the waste food can materials of the cap making factory to the field of metal packaging, and does not degrade and use the waste cap materials to other products, thereby reducing the use of new electrolytic aluminum liquid or re-melted ingots and really realizing green, efficient and recycling economy.

Description

Production method of circulating grade-preserving 5-series food can material
Technical Field
The invention belongs to the field of metal packaging processing in the aluminum processing industry, and particularly relates to a production method of a circulating grade-maintaining 5-series food can material.
Background
With the diversity of food packaging, lightweight aluminum food can packaging with metal packaging is becoming popular in the market. Different types of food cans are designed by domestic can factories according to market demands, and the strength of the can types is required to be suitable for high-altitude demands, so that higher requirements are put forward on the strength of food can materials. At present, only a few aluminum processing plants produce aluminum at home. But the waste materials generated in the can manufacturing process are not effectively recycled to the production of the can cover, and the production technology is still blank at home at present.
The waste material produced during the production of food can plants and used waste cans are generally returned to the society for recycling waste material plants for the production of other products. Thereby causing the waste material of the food cans to be degraded and causing waste of the aluminum resource of the food cans.
The recovered food waste tank material is recycled, and the requirement on the quality of the melt is high. With the light weight of the aluminum for the food can, the requirements on performance indexes such as thickness, strength, formability and the like of materials are higher and higher, and in order to obtain better materials, the production process is specially developed, so that various technical indexes such as the performance, the formability and the like of the materials meet the use requirements of downstream products.
Disclosure of Invention
The invention provides a production method of a circulating guaranteed 5-series food can material, which is used for solving the defects in the prior art.
The invention is realized by the following technical scheme:
a production method of a circulating grade-keeping 5-series food can material comprises the following steps:
the method comprises the following steps: adding the food tank waste into a waste treatment system for melting, wherein the melting temperature is 690-765 ℃, and detecting chemical components;
step two: according to the detected chemical composition result, an element remover is used for reducing the elements with high content in the alloy to the upper limit of the process requirement;
step three: transferring molten aluminum melted by the waste treatment system into a smelting furnace according to a charging proportion of 60-90%;
step four: the smelting furnace is matched with the chemical components of the 5 series food tank, and the smelting temperature is 690-765 ℃;
step five: transferring the qualified aluminum liquid into a heat preservation furnace for refining, wherein the refining temperature is 700-755 ℃, and the refining time is 20-90 minutes;
step six: carrying out online deslagging, degassing and filtering treatment, and casting a large flat ingot at the casting temperature of 670-720 ℃ and the casting speed of 50-60 mm/min;
step seven: milling the surface of the large flat ingot, wherein the milling amount of the large surface is 10-25 mm, and the milling amount of the small surface is 3-15 mm;
step eight: homogenizing the large flat ingot, wherein the homogenizing temperature is 480-580 ℃, and the heat preservation time is 3-20 hours;
step nine: the hot rolling finishing temperature is 300-350 ℃, and the thickness is 2-3 mm;
step ten: the temperature of the cold-rolled finished product is less than 100 ℃;
step eleven: and finishing, trimming, packaging and warehousing the finished products.
The production method of the circulating grade-keeping 5-series food can material is characterized by comprising the following steps of: the element remover in the second step comprises: iron removing agent, silicon removing agent and magnesium removing agent.
The production method of the circulating grade-keeping 5-series food can material is characterized by comprising the following steps of: the iron remover comprises the following main components: borax, zirconium chloride, potassium fluoborate, manganese chloride and calcium chloride.
The production method of the circulating grade-keeping 5-series food can material is characterized by comprising the following steps of: the main components of the silicon removing agent comprise: calcium sulfide, active carbon and sulfur.
The production method of the circulating grade-keeping 5-series food can material is characterized by comprising the following steps of: the magnesium removing agent mainly comprises the following components: chlorides and fluorides.
The preparation method of the production method of the circulating grade-keeping 5-series food can material is characterized by comprising the following steps of: the use sequence of the element remover in the second step is as follows: firstly adding a high-melting-point element remover, and then adding a low-melting-point element remover; the element remover is used in the following amount: the element remover is required to be added once every time the waste aluminum is added by the waste material treatment system, and the adding amount of the element remover is determined according to the detection content condition of each element of the batch of waste aluminum.
The invention has the advantages that:
the invention recovers the waste aluminum from the cap making plant, and purifies the quality of the aluminum liquid by the waste treatment system. The aluminum scrap with different proportions is used in the smelting furnace, the components of the aluminum liquid are uniform through electromagnetic stirring, and the aluminum liquid is refined in a heat preservation furnace and subjected to online degassing, deslagging and filtering. On-line LIMCA CM slag determination, determining slag content N 20 Controlled within 26k/kg, N 40 The control is within 2.3 k/kg. The maximum size of the compound is controlled to be 10-18 mu m when the finished product is observed by using an electron microscope, and the combination of process parameters of each procedure and strict process quality control ensure thatThe product quality is improved. The waste food can materials in the cap manufacturing plant are effectively recycled to the field of metal packaging, and waste cap materials are not degraded to be used for other products, so that the use of new electrolytic aluminum liquid or remelted ingots is reduced, the emission of carbon dioxide is reduced, and green high-efficiency recycling economy is really realized. The process equipment related by the invention is universal equipment, has lower cost, is easy to operate and is easy to realize industrially.
Description of the drawings:
FIG. 1 is a microstructure of a series 5 food can stock prepared in example 1;
FIG. 2 is a microstructure of a series 5 food can stock prepared in example 2;
FIG. 3 is a microstructure of a series 5 food can stock prepared in example 3;
FIG. 4 is a report of the test of the series 5 food cans prepared in example 1;
FIG. 5 is a report of the testing of the series 5 food cans prepared in example 2;
FIG. 6 is a report of the testing of the series 5 food cans prepared in example 3;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all embodiments of the present invention.
Example 1
Adding the recycled 5-series food can waste into a 755 ℃ waste treatment system for melting, wherein the chemical components detected after melting are as follows: si, 0.78%; 0.73 percent of Fe; 0.008% of Cu; 0.02% of Mn; 3.62 percent of Mg; 0.009% of Cr; 0.007% of Zn; 0.025 percent of Ti;
adding qualified recovered aluminum liquid melted in the waste treatment system into a 755 ℃ melting furnace according to 60% of charging amount, melting the recovered aluminum liquid, the remelted ingot and the intermediate alloy together with 40% of electrolytic aluminum liquid, the remelted ingot and the intermediate alloy, and using an electromagnetic stirrer to achieve uniform chemical components in the melting furnace;
the detection result after the components are adjusted and kept still for 10 minutes is as follows: 0.13 percent of Si; 0.22 percent of Fe; 0.003% of Cu; 0.0017% of Mn; mg, 2.41%; 0.004% of Cr; 0.003 percent of Zn; 0.017 percent of Ti;
transferring the molten aluminum in the smelting furnace to a 735 ℃ heat preservation furnace for refining for 35 minutes, and carrying out online deslagging, degassing and filtering treatment;
slag content condition
Figure BDA0003794804790000041
The slag content is one of the standards for measuring the quality and cleanliness of the melt, and the actual detection meets the process requirements;
the casting machine carries out casting at the casting temperature of 683 ℃ and the speed of 52 mm/min;
milling the large surface of a large flat ingot by 10mm, milling the small surface by 3mm, preserving the heat of the large flat ingot in a heating furnace at 480 ℃ for 12 hours, opening the furnace for rolling at 430 ℃, and performing hot rolling and final rolling at 310 ℃ to obtain the large flat ingot with the thickness of 2.7 mm;
the thickness of the cold-rolled finished product is 0.255mm, and the temperature is 85 ℃.
Example 2
Adding the recycled 5-series food can waste into a waste treatment system at 760 ℃ for melting, wherein the chemical components detected after melting are as follows: 0.75% of Si; 0.70 percent of Fe; 0.010% of Cu; mn, 0.012%; 3.60 percent of Mg; 0.009% of Cr; 0.007% of Zn; 0.027% of Ti;
adding 90% of the charging amount of the molten recovered aluminum liquid in the waste treatment system into a 760 ℃ smelting furnace, melting the molten recovered aluminum liquid and 10% of electrolytic aluminum liquid, re-melted ingots and intermediate alloys together, and using an electromagnetic stirrer to achieve uniform chemical components in the smelting furnace;
the detection result after 10 minutes of standing by adjusting the components is as follows: 0.12% of Si; 0.23 percent of Fe; cu, 0.009%; 0.008% of Mn; mg, 2.46%; 0.004% of Cr; 0.005% of Zn; 0.018% of Ti;
transferring the molten aluminum in the smelting furnace to a 740 ℃ heat preservation furnace for refining for 45 minutes, and carrying out online deslagging, degassing and filtering treatment;
slag content condition
Figure BDA0003794804790000051
The slag content is one of the standards for measuring the quality and cleanliness of the melt, and the actual detection meets the process requirements;
the casting machine carries out casting at the casting temperature of 695 ℃ and the speed of 56 mm/min;
milling the large surface of a large flat ingot by 10mm, milling the small surface by 3mm, preserving the heat for 8 hours at 500 ℃ in a heating furnace, opening the furnace for rolling at 450 ℃, and performing hot rolling and final rolling at 330 ℃ to obtain the large flat ingot with the thickness of 2.6 mm;
the thickness of the cold-rolled finished product is 0.260mm, and the temperature is 80 ℃.
Example 3
Adding the recycled 5-series food can waste into a 755 ℃ waste treatment system for melting, wherein the chemical components detected after melting are as follows: si, 0.73%; 0.72 percent of Fe; 0.011% of Cu; mn, 0.010%; 3.4 percent of Mg; 0.007% of Cr; 0.010% of Zn; 0.028% of Ti;
adding 90% of the charging amount of the molten recovered aluminum liquid in the waste treatment system into a 755 ℃ smelting furnace, melting the molten aluminum liquid and 10% of other alloy self-produced waste together, and using an electromagnetic stirrer to achieve uniform chemical components in the smelting furnace;
the detection result after the components are adjusted and kept still for 10 minutes is as follows: si, 0.14%; 0.24 percent of Fe; 0.007% of Cu; 0.006% of Mn; mg, 2.48%; 0.006 percent of Cr; 0.005% of Zn; ti, 0.021%;
transferring the molten aluminum in the smelting furnace to a 745 ℃ heat preservation furnace for refining for 50 minutes, and carrying out online deslagging, degassing and filtering treatment;
slag content condition
Figure BDA0003794804790000052
The slag content is one of the standards for measuring the quality and cleanliness of the melt, and the actual detection meets the process requirements;
the casting machine carries out casting at the casting temperature of 700 ℃ and the speed of 60 mm/min;
milling the large surface of a large flat ingot by 10mm, milling the small surface by 3mm, preserving the heat of the large flat ingot in a heating furnace at 520 ℃ for 5 hours, opening the furnace for rolling at 480 ℃, and performing hot rolling and final rolling at 340 ℃ to obtain the large flat ingot with the thickness of 2.5 mm;
the thickness of the cold-rolled finished product is 0.265mm, and the temperature is 77 ℃.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (6)

1. A production method of a circulating grade-keeping 5-series food can material is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: adding the food tank waste into a waste treatment system for melting, wherein the melting temperature is 690-765 ℃, and detecting chemical components;
step two: according to the detected chemical composition result, an element remover is used for reducing the elements with high content in the alloy to the upper limit of the process requirement;
step three: transferring molten aluminum melted by the waste treatment system into a smelting furnace according to a charging proportion of 60-90%;
step four: the smelting furnace is matched with the chemical components of the 5 series food tank, and the smelting temperature is 690-765 ℃;
step five: transferring the qualified aluminum liquid into a heat preservation furnace for refining, wherein the refining temperature is 700-755 ℃, and the refining time is 20-90 minutes;
step six: carrying out online deslagging, degassing and filtering treatment, and casting a large flat ingot at the casting temperature of 690-720 ℃ and the casting speed of 50-60 mm/min;
step seven: milling the surface of the large flat ingot, wherein the milling amount of the large surface is 10-25 mm, and the milling amount of the small surface is 3-15 mm;
step eight: homogenizing the large flat ingot, wherein the homogenizing temperature is 480-580 ℃, and the heat preservation time is 3-20 hours;
step nine: the hot rolling finishing temperature is 300-350 ℃, and the thickness is 2-3 mm;
step ten: the temperature of the cold-rolled finished product is less than 100 ℃;
step eleven: and finishing, trimming, packaging and warehousing the finished products.
2. The method for producing the circulating grade 5 series food can material according to the claim 1, characterized in that: the element remover in the second step comprises: iron removing agent, silicon removing agent and magnesium removing agent.
3. The method for producing the circulating grade 5 series food can material according to the claim 2, characterized in that: the iron remover comprises the following main components: borax, zirconium chloride, potassium fluoborate, manganese chloride and calcium chloride.
4. The method for producing the circulating grade 5 series food can material according to the claim 3, characterized in that: the main components of the silicon removing agent comprise: calcium sulfide, active carbon and sulfur.
5. The method for producing the circulation grade 5 series food can material according to the claim 3, characterized in that: the magnesium removing agent mainly comprises the following components: chlorides and fluorides.
6. The method for preparing the circulating grade 5 series food can material according to the claim 1, characterized in that: the use sequence of the element remover in the second step is as follows: firstly adding a high-melting-point element remover, and then adding a low-melting-point element remover; the element remover is used in the following amount: the element remover is required to be added once every time the waste aluminum is added by the waste material treatment system, and the adding amount of the element remover is determined according to the detection content condition of each element of the batch of waste aluminum.
CN202210965601.0A 2022-08-12 2022-08-12 Production method of circulating grade-maintaining 5-series food can material Pending CN115125407A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011023060A1 (en) * 2009-08-27 2011-03-03 贵州华科铝材料工程技术研究有限公司 High-strength heat-proof aluminum alloy material and producing method thereof
CN109022944A (en) * 2018-07-28 2018-12-18 河南明泰铝业股份有限公司 A kind of shell case aluminium alloy plate and its production method
CN113070361A (en) * 2021-02-24 2021-07-06 山东南山铝业股份有限公司 Hot-rolling special rolling production method for 6-series automobile plate
CN114622107A (en) * 2022-02-10 2022-06-14 山东南山铝业股份有限公司 Green circulating grading 5-series low-strength automobile plate production method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011023060A1 (en) * 2009-08-27 2011-03-03 贵州华科铝材料工程技术研究有限公司 High-strength heat-proof aluminum alloy material and producing method thereof
CN109022944A (en) * 2018-07-28 2018-12-18 河南明泰铝业股份有限公司 A kind of shell case aluminium alloy plate and its production method
CN113070361A (en) * 2021-02-24 2021-07-06 山东南山铝业股份有限公司 Hot-rolling special rolling production method for 6-series automobile plate
CN114622107A (en) * 2022-02-10 2022-06-14 山东南山铝业股份有限公司 Green circulating grading 5-series low-strength automobile plate production method

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Application publication date: 20220930