CN113337832A - Cleaning device for producing secondary aluminum and secondary aluminum production process applying same - Google Patents
Cleaning device for producing secondary aluminum and secondary aluminum production process applying same Download PDFInfo
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- CN113337832A CN113337832A CN202110535634.7A CN202110535634A CN113337832A CN 113337832 A CN113337832 A CN 113337832A CN 202110535634 A CN202110535634 A CN 202110535634A CN 113337832 A CN113337832 A CN 113337832A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 148
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 238000004140 cleaning Methods 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 68
- 238000001035 drying Methods 0.000 claims abstract description 24
- 238000005507 spraying Methods 0.000 claims abstract description 23
- 238000007872 degassing Methods 0.000 claims abstract description 20
- 239000007921 spray Substances 0.000 claims abstract description 19
- 238000007670 refining Methods 0.000 claims abstract description 17
- 238000005275 alloying Methods 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 15
- 238000003723 Smelting Methods 0.000 claims abstract description 14
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 43
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 30
- 239000002699 waste material Substances 0.000 claims description 30
- 229910000838 Al alloy Inorganic materials 0.000 claims description 20
- 238000005238 degreasing Methods 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000002893 slag Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000007667 floating Methods 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000003960 organic solvent Substances 0.000 claims description 8
- 239000012670 alkaline solution Substances 0.000 claims description 7
- 239000001307 helium Substances 0.000 claims description 7
- 229910052734 helium Inorganic materials 0.000 claims description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 31
- 239000004411 aluminium Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000003973 paint Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/04—Apparatus
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a cleaning device for producing secondary aluminum and a secondary aluminum production process using the same, wherein the cleaning device comprises a conveying assembly, a material frame and a cleaning pool; the conveying assembly comprises a conveying rail and a hook, the hook is fixed on the conveying rail, a lifting rope is arranged above the conveying rail, and a lifting ring is arranged at the top end of the lifting rope; the cleaning pool comprises a first oil removing pool, a second oil removing pool, a spraying pool and a drying pool which are arranged side by side; the upper ends of the first oil removal tank, the second oil removal tank, the spray tank and the drying tank are all open, and corresponding oil removal solvents are respectively injected into the first oil removal tank and the second oil removal tank. The production process comprises the following steps: deoiling, cleaning, drying, feeding and smelting, sampling and detecting, alloying, pre-deslagging, component adjusting, deslagging and refining, degassing and refining, furnace front detection, standing and casting. The invention can effectively reduce burning loss, reduce energy consumption, reduce pollution, reduce the operation difficulty of workers and improve the production precision of secondary aluminum.
Description
Technical Field
The invention relates to the technical field of aluminum alloy production, in particular to a cleaning device for secondary aluminum production and a secondary aluminum production process using the same.
Background
Aluminum alloys are the most widely used class of non-ferrous structural materials in industry and have found a number of applications in the aerospace, automotive, mechanical manufacturing, marine and chemical industries. The rapid development of industrial economy has increased the demand for aluminum alloy welded structural members, and the research on the weldability of aluminum alloys is also deepened. The aluminum alloy has low density, high strength similar to or superior to that of high-quality steel, good plasticity, excellent electric conductivity, heat conductivity and corrosion resistance, is widely used in industry, and is second to steel in use amount.
In the production and processing of aluminum and aluminum alloy products, a large amount of process waste and defective products, such as production and processing of aluminum alloy sheets, strips, foil products, the comprehensive processing yield is about 70 percent generally, and in the composition of the rest 30 percent of aluminum alloy process waste, the scrap aluminum alloy which is produced in the processes of end cutting, tongue end material, edge cutting and other process links in the hot rolling process of the aluminum alloy slab ingot with relatively small specific surface area and can be directly recycled and put into an aluminum alloy smelting furnace for remelting only accounts for about 10 percent, the rest about 20 percent of the aluminum alloy process waste materials are mainly saw, milling scrap materials, irregular cold rolling thin materials and aluminum foil material packing and briquetting of aluminum alloy slab ingots, and have the common characteristics of large specific surface area of metal, small volume weight, irregular shape, more oil stains, chemical coatings and other pollution impurities.
At present, the domestic large-scale recovery treatment of the part of waste aluminum alloy is usually carried out by directly adding the waste aluminum alloy into a flame furnace or an induction furnace for remelting, and the recovery treatment process has the main problem of large metal burning loss (generally not less than 7-8%); the remelting energy consumption is high (generally not less than 80 ten thousand kilocalories per ton of aluminum (fuel oil or natural gas) or 650KWh per ton of aluminum (intermediate frequency induction furnace)); the environmental pollution is heavy (SO2, NOx, HCl, and dioxane/furan gases and dust random discharge); the labor intensity of the staff is high, the operation condition is bad, and the like.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides the method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cleaning device for producing secondary aluminum comprises a conveying assembly, a material frame and a cleaning pool; the conveying assembly is positioned right above the cleaning pool and comprises a conveying rail and a hook, the hook is fixed on the conveying rail and moves along with the conveying rail, a lifting rope is arranged above the conveying rail, and a lifting ring is arranged at the top end of the lifting rope; the cleaning pool comprises a first oil removing pool, a second oil removing pool, a spraying pool and a drying pool which are sequentially arranged side by side from left to right; the first oil removal pond the second remove the oil pond the spray pond and the inside dimension of stoving pond is the same and all is greater than the external dimension of material frame, the first oil removal pond the second remove the oil pond the spray pond and the upper end of stoving pond is uncovered, the first oil removal pond with corresponding deoiling solvent of injection respectively in the second deoiling pond.
Preferably, the degreasing solvent in the first degreasing bath is an organic solvent capable of dissolving grease.
Preferably, the degreasing solvent in the second degreasing bath is an alkaline solution.
Preferably, spray headers are uniformly distributed on two opposite side walls of the spray tank, and the spray headers are inclined downwards.
Preferably, air blowing nozzles are uniformly distributed on two opposite side walls of the drying pool, and the air blowing nozzles are horn-shaped.
Preferably, the material frame is cuboid, the top surface of the material frame is open, a frame door is arranged in front of the material frame, the left side of the frame door is hinged to the edge of the left side face of the material frame, a lock catch is arranged on the right side of the frame door, the lock catch is detachably locked to the edge of the right side face of the material frame, and the frame door and the rest four faces of the material frame except the top surface are diamond mesh-shaped hollow structures.
A production process for producing secondary aluminum by using a cleaning device comprises the following steps:
s1: deoiling: hanging the material frame filled with the waste aluminum material on a conveying assembly, and sequentially entering a first deoiling pool and a second deoiling pool for soaking and deoiling;
s2: cleaning: placing the material frame subjected to deoiling operation in a spraying pool for washing;
s3: drying: drying the washed waste aluminum, and then transferring to a side of a smelting furnace;
s4: feeding and smelting: before that, the furnace is required to be baked, the temperature of the furnace is slowly raised to 600-;
s5: sampling and detecting: pre-analyzing the molten aluminum in S4, judging components in the aluminum liquid and corresponding contents thereof, and outputting a pre-inspection list;
s6: alloying: comparing the component proportion of the aluminum alloy grade to be produced with a pre-inspection list, calculating the weight and the quantity of the metal to be added for alloying, wherein the alloying time needs to be controlled at 100-150 minutes;
s7: pre-deslagging: pre-deslagging the aluminum liquid after alloying, and deslagging the aluminum slag floating above;
s8: component adjustment: sampling and detecting the molten aluminum subjected to slag removal in the step S7, comparing a detection result with the component content in the alloy mark, and adding the types and the quantity of the metal lacking after alloying;
s9: deslagging and refining: adding a refining agent into the aluminum liquid in the step S8, stirring to ensure that the refining agent is fully contacted with the aluminum liquid, standing for 3-5 minutes, and then slagging off until no obvious dross exists on the surface of the aluminum liquid;
s10: degassing and refining: uniformly introducing nitrogen or helium into the aluminum liquid after deslagging, wherein the degassing pipe is positioned at the bottom of the aluminum liquid and is 10-15 cm away from the furnace bottom, so that the gas can be fully contacted with the aluminum liquid when floating upwards;
s11: detection in front of the furnace: sampling and inspecting the aluminum liquid again after degassing, determining the types and the quantity of the lacking pure metals again according to the inspection result, adding the pure metals into the furnace for melting, and stirring uniformly;
s12: standing: floating up until no bubbles and suspended matters exist;
s13: casting: and pouring the qualified aluminum liquid into the mold, and cooling to finally obtain a qualified regenerated aluminum ingot.
Preferably, the soaking time of the material frames in the S1 and the S2 in the corresponding pool is not less than 20 minutes, and the material frames need to be suspended and stand for 10 to 20 minutes after being lifted from the corresponding pool.
Preferably, when pure metal is added in S6, S8 and S11, the added metal is pressed into the molten aluminum by a slag discharge rake after being put into the furnace, so that the metal is completely wrapped in the molten aluminum and then stirred and mixed.
Preferably, the degassing pipes for inputting helium or nitrogen in S10 are uniformly distributed calandria, two pipes at the extreme edge of the calandria are close to the furnace wall, and during degassing operation, the calandria moves at a constant speed along the direction vertical to the length extension direction of the calandria so that the gas is uniformly contacted with the aluminum liquid.
Compared with the prior art, the invention has the beneficial effects that: due to the arrangement of the cleaning device, oil stains, paint and the like on the surface of industrial aluminum scrap can be dissolved by using an organic solvent in the first oil removing pool, residual oil stains on the aluminum scrap can be removed by using an alkaline solution in the second oil removing pool, and the oil stains in the aluminum scrap can be effectively removed through two oil removing procedures, so that the production of aluminum slag can be reduced during subsequent melting; the arrangement of the spraying tank can wash off dirt attached to the surface of the waste aluminum after the waste aluminum is deoiled by the deoiling tank, so that the cleanliness of the waste aluminum is further improved, and the spraying tank is matched with the drying tank to dry moisture on the surface of the waste aluminum to obtain clean waste aluminum to be melted; four ponds are adjacent to be set up, make the material frame directly can enter into next pond after coming out from last pond, and new material frame can enter into last pond again to can continuously carry out the work of deoiling of aluminium scrap, continuously export clean aluminium scrap, simple structure and high efficiency. Utilize above-mentioned cleaning device to carry out the aluminium scrap after deoiling and carry out secondary aluminum production, can effectively reduce the production of slag to reduce staff's work load, can reduce the remelting time, thereby reduce the burning loss, reduce the remelting energy consumption, because greasy dirt especially waits to clear away in advance, can reduce harmful gas's when melting production, also reduce the pollution to the environment. In addition, in the production process of the secondary aluminum, the pure metal is directly embedded into the aluminum liquid for melting when being added, so that the burning loss can be effectively reduced, and the precision is effectively improved.
Drawings
FIG. 1 is a schematic view showing the overall structure of a cleaning apparatus for secondary aluminum production;
FIG. 2 is a schematic structural diagram of a material frame of a cleaning device for secondary aluminum production;
FIG. 3 is a schematic view showing the construction of a transfer rail of a cleaning apparatus for secondary aluminum production;
FIG. 4 is a process flow diagram of a process for producing recycled aluminum using a cleaning apparatus.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, 2 and 3, the invention provides a cleaning device for secondary aluminum production, which comprises a conveying assembly 1, a material frame 2 and a cleaning pool 3; the conveying assembly 1 comprises a conveying rail 11 and a hook 12, the hook 12 is fixed on the conveying rail 11 and moves along with the conveying rail 11, a lifting rope 13 is arranged above the conveying rail 11, a lifting ring 14 is arranged at the top end of the lifting rope 13, and the lifting rope 13 is wound on the lifting ring 14; the cleaning pool 3 comprises a first deoiling pool 31, a second deoiling pool 32, a spraying pool 33 and a drying pool 34 which are arranged side by side from left to right in sequence; the inside size of first deoiling pond 31, second deoiling pond 32, spray pond 33 and stoving pond 34 is the same and all is greater than the outside size of material frame 2, and the upper end of first deoiling pond 31, second deoiling pond 32, spray pond 33 and stoving pond 34 is uncovered, pours into corresponding deoiling solvent into respectively in first deoiling pond 31 and the second deoiling pond 32. Preferably, the degreasing solvent in the first degreasing bath 31 is an organic solvent capable of dissolving grease. Further, the degreasing solvent in the second degreasing bath 32 may be an alkaline solution.
In an embodiment, the first deoiling tank 31, the second deoiling tank 32, the spraying tank 33 and the drying tank 34 are arranged side by side in sequence, and the material frame 2 filled with the waste aluminum can enter each tank at a time to perform corresponding operation along with the movement of the conveying track 11. It should be noted that the first degreasing tank 31, the second degreasing tank 32, the spraying tank 33 and the drying tank 34 are arranged in a straight line, the conveying track 11 opposite to the straight line is oblong, and the length of the long straight edge of the straight line is greater than the sum of the lengths of the first degreasing tank 31, the second degreasing tank 32, the spraying tank 33 and the drying tank 34, so that the material frame 2 can advance in the straight line direction once and correspondingly enter the corresponding tanks. Because the oil stain can be dissolved by soaking the organic solvent in the initial untreated industrial waste aluminum dirty heavy oil, the organic solvent is injected into the first oil removing tank 31 to remove most of the oil stain, and then the alkaline solution is injected into the second oil removing tank 32 to perform secondary reaction on the oil stain which is not completely dissolved and remove the oil stain, so that the aim of effectively removing the oil stain is fulfilled. Wherein, the alkaline solution is preferably sodium bicarbonate solution, the cost is low, and the oil removal effect is good. The setting of spray tank 33 can wash remaining solution on the aluminium scrap through second deoiling pond 32 deoiling back, obtains clean aluminium scrap, then dries it through stoving pond 34, gets rid of moisture, and the follow-up stove of throwing of being convenient for melts.
In an embodiment, the far end of the conveying track 11 is electrically connected with a controller, a driving motor is arranged in the conveying track, and the controller is electrically connected with the driving motor to drive the driving motor to rotate, so as to drive the material frame to advance. When the material frame 2 needs to be lifted, the conveying assembly 1 can be directly lifted by using the lifting device. Four fixing rings 111 are symmetrically arranged on the upper surface of the conveying track and used for fixing the lifting ropes 13.
Preferably, the shower heads 331 are uniformly arranged on opposite sidewalls of the shower bath 33, and the shower heads 331 are inclined downward. The shower head 331 inclines downwards, is more convenient for wash the aluminium scrap in the material frame 2, and sprays the area bigger, can effectively reduce simultaneously that the shower water splashes. The shower head 331 is communicated with an external water injection pipe, so that shower water can be continuously input conveniently.
Preferably, the air blowing nozzles 341 are uniformly arranged on two opposite side walls of the drying pool 34, the air blowing nozzles 341 are horn-shaped, so that the air blowing area can be effectively increased, the air blowing and drying effects are improved, the air blowing nozzles 341 are connected with an external hot air blower, and hot air is blown out, so that the waste aluminum is dried conveniently.
It should be noted that the bottom sides of the first degreasing tank 31, the second degreasing tank 32, the spray tank 33 and the drying tank 34 are respectively provided with an adjustable water outlet 35, so that the waste liquid is conveniently discharged, and the cleaning efficiency is effectively ensured. Wherein, the drain ports 35 of the first deoiling pool 31 and the second deoiling pool 32 are provided with valves, the valves are closed when the deoiling solvent is filled in the valves, and the waste liquid can be discharged by opening the valves when the deoiling solvent needs to be replaced. The water outlets 35 of the spraying tank 33 and the drying tank 34 are always in an open state, so that water in the tanks can be discharged in time, and spraying and drying are facilitated.
Preferably, material frame 2 is the cuboid shape, and the top surface of material frame 2 is the open-type, and the preceding of material frame 2 is provided with frame door 21, and the left side of frame door 21 articulates at the left surface edge of material frame 2, and the right side of frame door 21 sets up hasp 22, and hasp 22 detachable locking is at the edge of the right flank of material frame 2, and frame door 21 and the rest four sides of material frame 2 except the top surface are the hollow out construction of diamond grid net shape. The material frame 2 with the structure is convenient to feed into the material frame 2, namely, the frame door 21 of the material frame 2 is opened at the beginning, the material can be directly fed from the frame door 21, the feeding at the open position at the top of the material frame 2 in the whole process is avoided, the feeding time can be effectively saved, the feeding difficulty of workers is reduced, and the feeding efficiency is improved; on the other hand, 2 bottom surfaces of material frame and all around are the rhombus net parcel, it can enter into material frame 2 inside to be convenient for remove oil solvent when material frame 2 takes the aluminium scrap to enter into first deoiling pond 31 and second deoiling pond 32 in can entering into fast, dissolve grease on the aluminium scrap, solution in rising back material frame 2 in from first deoiling pond 31 and the second deoiling pond 32 in time flows out from material frame 2, be convenient for when spraying in spray bath 33 simultaneously, flow to spray bath 33 in easily with the aquatic after spraying, be convenient for spray work and continue going on, in stoving pond 34, the wind of being convenient for blow into can blow in the gap between the aluminium scrap in the material frame 2. Four angles above the material frame are fixedly provided with lifting ropes 23, the lifting ropes 23 are gathered in the middle and fixed on a lifting ring 24, and the hooks 12 are convenient to fix.
As shown in fig. 4, a production process for producing recycled aluminum by using a cleaning device comprises the following steps:
s1: deoiling: hanging the material frame 2 filled with the waste aluminum material on the conveying assembly 1, and sequentially entering a first deoiling pool 31 and a second deoiling pool 32 for soaking and deoiling; the first step of deoiling is deoiling by using an organic solvent, the second step of deoiling by using an alkaline chemical solvent, and through the two steps of deoiling, paint and oil stains on the aluminum scraps can be effectively removed, so that more aluminum slag is avoided during smelting;
s2: cleaning: placing the material frame 2 subjected to the deoiling operation in a spraying pool 33 for washing; the spraying tank 33 is used for washing, so that oil stains dissolved by the deoiling solvent can be completely washed from the aluminum scrap, meanwhile, the spraying head 331 in the spraying tank 33 is a high-pressure nozzle, and dust and the like condensed on the aluminum scrap can be washed away by spraying with high-pressure water, so that clean aluminum scrap is obtained;
s3: drying: drying the washed waste aluminum, and then transferring to a side of a smelting furnace; the dried aluminum scrap is convenient to directly put into a smelting furnace for smelting, so that the phenomenon that the aluminum scrap contains moisture and generates oxidation reaction during high-temperature heating is avoided, and burning loss is avoided;
s4: feeding and smelting: before that, the furnace is required to be baked, the temperature of the furnace is slowly raised to 600-; the furnace baking is to keep the melting point range of the furnace rate when the waste aluminum is put into the furnace, so that the waste aluminum is convenient to melt directly, the smelting efficiency is improved, and the burning loss is reduced effectively as the heating time is longer and the burning loss is larger;
s5: sampling and detecting: pre-analyzing the molten aluminum in S4, judging components in the aluminum liquid and corresponding contents thereof, and outputting a pre-inspection list; before sampling detection, ensuring that the waste aluminum, pure aluminum and the like are completely smelted, stirring the aluminum liquid for more than 5 minutes, thus ensuring the uniformity of the components and the temperature of the aluminum alloy liquid; meanwhile, the sampling part is selected from the middle part of the smelting furnace, and the sampling part is ensured to be 15-25 cm below the page, and the temperature in the smelting furnace is kept at 680-700 ℃;
s6: alloying: comparing the component proportion of the aluminum alloy grade to be produced with a pre-inspection list, calculating the weight and the quantity of the metal to be added for alloying, wherein the alloying time needs to be controlled at 100-150 minutes;
s7: pre-deslagging: pre-deslagging the aluminum liquid after alloying, and deslagging the aluminum slag floating above;
s8: component adjustment: sampling and detecting the molten aluminum subjected to slag removal in the step S7, comparing a detection result with the component content in the alloy mark, and adding the types and the quantity of the metal lacking after alloying;
s9: deslagging and refining: adding a refining agent into the aluminum liquid in the step S8, stirring to ensure that the refining agent is fully contacted with the aluminum liquid, standing for 3-5 minutes, and then slagging off until no obvious dross exists on the surface of the aluminum liquid; when deslagging is carried out, a refining agent is sprayed on the surface of the molten aluminum, then the molten aluminum is fully and uniformly stirred, and meanwhile, the powder spraying work needs to be carried out in batches, so that the refining agent is ensured to be uniformly contacted with the molten aluminum, and ash residues are conveniently generated and float upwards;
s10: degassing and refining: uniformly introducing nitrogen or helium into the aluminum liquid after deslagging, wherein the degassing pipe is positioned at the bottom of the aluminum liquid and is 10-15 cm away from the furnace bottom, so that the gas can be fully contacted with the aluminum liquid when floating upwards;
s11: detection in front of the furnace: sampling and inspecting the aluminum liquid again after degassing, determining the types and the quantity of the lacking pure metals again according to the inspection result, adding the pure metals into the furnace for melting, and stirring uniformly;
s12: standing: floating until no bubble and suspended matter float, and finally slagging off after no bubble, so as to ensure that the molten aluminum meets the casting requirement;
s13: casting: and pouring the qualified aluminum liquid into the mold, and cooling to finally obtain a qualified regenerated aluminum ingot.
Preferably, the material frame 2 in S1 and S2 is soaked in the corresponding pool for not less than 20 minutes, and is suspended and stands for 10-20 minutes after being lifted from the corresponding pool. The liquid in the material frame 2 can be separated from the material frame 2 under the action of gravity conveniently when the first oil removal tank 31, the second oil removal tank 32 and the third oil removal tank are taken out, the next step of work is facilitated, and the pollution to the next tank is reduced as much as possible.
Preferably, when pure metal is added in S6, S8 and S11, the added metal is pressed into the molten aluminum by a slag discharge rake after being put into the furnace, so that the metal is completely wrapped in the molten aluminum and then stirred and mixed. The added alloy metal is directly wrapped by the aluminum liquid, so that the metal is prevented from contacting with the outside air, the metal oxidation can be effectively reduced, the metal burning loss is effectively reduced, and the precision of each metal content in the production of the aluminum alloy is improved.
Preferably, the degassing pipes for inputting helium or nitrogen in S10 are uniformly distributed calandria, two pipes at the extreme edge of the calandria are close to the furnace wall, and during degassing operation, the calandria moves at a constant speed along the direction vertical to the length extension direction of the calandria, so that the gas is uniformly contacted with the aluminum liquid. The degassing pipe with the structure can enable inert gases such as nitrogen or helium to be uniformly blown out into the aluminum liquid through the exhaust pipe, ensures that the aluminum liquid is fully contacted with degassing gas, has high degassing efficiency and effectively improves the degassing refining efficiency.
According to the cleaning device for producing the regenerated aluminum and the regenerated aluminum production process using the cleaning device, the cleaning device is arranged, so that oil stains, paint and the like on the surface of industrial waste aluminum can be dissolved by using the organic solvent in the first deoiling tank, the residual oil stains on the waste aluminum can be removed by using the alkaline solution in the second deoiling tank, and the oil stains in the waste aluminum can be effectively removed through two deoiling procedures, so that the production amount of aluminum slag can be reduced conveniently during subsequent melting; the arrangement of the spraying tank can wash off dirt attached to the surface of the waste aluminum after the waste aluminum is deoiled by the deoiling tank, so that the cleanliness of the waste aluminum is further improved, and the spraying tank is matched with the drying tank to dry moisture on the surface of the waste aluminum to obtain clean waste aluminum to be melted; four ponds are adjacent to be set up, make the material frame directly can enter into next pond after coming out from last pond, and new material frame can enter into last pond again to can continuously carry out the work of deoiling of aluminium scrap, continuously export clean aluminium scrap, simple structure and high efficiency. Utilize above-mentioned cleaning device to carry out the aluminium scrap after deoiling and carry out secondary aluminum production, can effectively reduce the production of slag to reduce staff's work load, can reduce the remelting time, thereby reduce the burning loss, reduce the remelting energy consumption, because greasy dirt especially waits to clear away in advance, can reduce harmful gas's when melting production, also reduce the pollution to the environment. In addition, in the production process of the secondary aluminum, the pure metal is directly embedded into the aluminum liquid for melting when being added, so that the burning loss can be effectively reduced, and the precision is effectively improved.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (10)
1. The utility model provides a belt cleaning device of secondary aluminum production which characterized in that: comprises a conveying component, a material frame and a cleaning pool; the conveying assembly is positioned right above the cleaning pool and comprises a conveying rail and a hook, the hook is fixed on the conveying rail and moves along with the conveying rail, a lifting rope is arranged above the conveying rail, and a lifting ring is arranged at the top end of the lifting rope; the cleaning pool comprises a first oil removing pool, a second oil removing pool, a spraying pool and a drying pool which are sequentially arranged side by side from left to right; the first oil removal pond the second remove the oil pond the spray pond and the inside dimension of stoving pond is the same and all is greater than the external dimension of material frame, the first oil removal pond the second remove the oil pond the spray pond and the upper end of stoving pond is uncovered, the first oil removal pond with corresponding deoiling solvent of injection respectively in the second deoiling pond.
2. The cleaning apparatus for secondary aluminum production as set forth in claim 1, wherein: the degreasing solvent in the first degreasing pool is an organic solvent capable of dissolving grease.
3. The cleaning apparatus for secondary aluminum production as set forth in claim 1, wherein: and the degreasing solvent in the second degreasing pool is alkaline solution.
4. The cleaning apparatus for secondary aluminum production as set forth in claim 1, wherein: and spray headers are uniformly distributed on two opposite side walls of the spray pond, and the spray headers are inclined downwards.
5. The cleaning apparatus for secondary aluminum production as set forth in claim 1, wherein: and air blowing nozzles are uniformly distributed on two opposite side walls of the drying pool and are horn-shaped.
6. The cleaning apparatus for secondary aluminum production as set forth in claim 1, wherein: the material frame is rectangular, the top surface of the material frame is open, a frame door is arranged in front of the material frame, the left side of the frame door is hinged to the edge of the left side face of the material frame, a lock catch is arranged on the right side of the frame door and detachably locked to the edge of the right side face of the material frame, and the frame door and the rest four faces of the material frame except the top surface are diamond-grid-shaped hollow structures.
7. A production process for producing secondary aluminum by using the cleaning device of claim 1, which is characterized in that: the method comprises the following steps:
s1: deoiling: hanging the material frame filled with the waste aluminum material on a conveying assembly, and sequentially entering a first deoiling pool and a second deoiling pool for soaking and deoiling;
s2: cleaning: placing the material frame subjected to deoiling operation in a spraying pool for washing;
s3: drying: drying the washed waste aluminum, and then transferring to a side of a smelting furnace;
s4: feeding and smelting: before that, the furnace is required to be baked, the temperature of the furnace is slowly raised to 600-;
s5: sampling and detecting: pre-analyzing the molten aluminum in S4, judging components in the aluminum liquid and corresponding contents thereof, and outputting a pre-inspection list;
s6: alloying: comparing the component proportion of the aluminum alloy grade to be produced with a pre-inspection list, calculating the weight and the quantity of the metal to be added for alloying, wherein the alloying time needs to be controlled at 100-150 minutes;
s7: pre-deslagging: pre-deslagging the aluminum liquid after alloying, and deslagging the aluminum slag floating above;
s8: component adjustment: sampling and detecting the molten aluminum subjected to slag removal in the step S7, comparing a detection result with the component content in the alloy mark, and adding the types and the quantity of the metal lacking after alloying;
s9: deslagging and refining: adding a refining agent into the aluminum liquid in the step S8, stirring to ensure that the refining agent is fully contacted with the aluminum liquid, standing for 3-5 minutes, and then slagging off until no obvious dross exists on the surface of the aluminum liquid;
s10: degassing and refining: uniformly introducing nitrogen or helium into the aluminum liquid after deslagging, wherein the degassing pipe is positioned at the bottom of the aluminum liquid and is 10-15 cm away from the furnace bottom, so that the gas can be fully contacted with the aluminum liquid when floating upwards;
s11: detection in front of the furnace: sampling and inspecting the aluminum liquid again after degassing, determining the types and the quantity of the lacking pure metals again according to the inspection result, adding the pure metals into the furnace for melting, and stirring uniformly;
s12: standing: floating up until no bubbles and suspended matters exist;
s13: casting: and pouring the qualified aluminum liquid into the mold, and cooling to finally obtain a qualified regenerated aluminum ingot.
8. The secondary aluminum production process of claim 7, wherein: the soaking time of the material frames in the S1 and the S2 in the corresponding pool is not less than 20 minutes, and the material frames need to be suspended and placed for 10-20 minutes after being lifted from the corresponding pool.
9. A secondary aluminum production process as claimed in claim 1, wherein: when pure metal is added in S6, S8 and S11, the added metal is pressed into the molten aluminum by using a slag discharging rake after the pure metal is put into the furnace, so that the metal is completely wrapped in the molten aluminum and then stirred and mixed.
10. A secondary aluminum production process as claimed in claim 1, wherein: and in S10, the degassing pipes for inputting helium or nitrogen are uniformly distributed calandria, two pipes at the extreme edge of the calandria are close to the furnace wall, and during degassing operation, the calandria moves at a constant speed along the direction vertical to the length extension direction of the calandria so that the gas is uniformly contacted with the aluminum liquid.
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| CN202110535634.7A CN113337832A (en) | 2021-05-17 | 2021-05-17 | Cleaning device for producing secondary aluminum and secondary aluminum production process applying same |
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| CN202110535634.7A CN113337832A (en) | 2021-05-17 | 2021-05-17 | Cleaning device for producing secondary aluminum and secondary aluminum production process applying same |
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Application publication date: 20210903 |