CN105018739A - Efficient and comprehensive aluminium ash recycling method - Google Patents
Efficient and comprehensive aluminium ash recycling method Download PDFInfo
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- CN105018739A CN105018739A CN201510458926.XA CN201510458926A CN105018739A CN 105018739 A CN105018739 A CN 105018739A CN 201510458926 A CN201510458926 A CN 201510458926A CN 105018739 A CN105018739 A CN 105018739A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 103
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 239000004411 aluminium Substances 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000004064 recycling Methods 0.000 title abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000002386 leaching Methods 0.000 claims abstract description 21
- 238000007670 refining Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 27
- 239000002893 slag Substances 0.000 claims description 21
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000005363 electrowinning Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 17
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005868 electrolysis reaction Methods 0.000 abstract description 4
- 125000001309 chloro group Chemical class Cl* 0.000 abstract 4
- 238000005272 metallurgy Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 18
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 13
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 10
- 238000003912 environmental pollution Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000011780 sodium chloride Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- RBFQJDQYXXHULB-UHFFFAOYSA-N arsane Chemical compound [AsH3] RBFQJDQYXXHULB-UHFFFAOYSA-N 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- MDPILPRLPQYEEN-UHFFFAOYSA-N aluminium arsenide Chemical compound [As]#[Al] MDPILPRLPQYEEN-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 239000000274 aluminium melt Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses an efficient and comprehensive aluminium ash recycling method and belongs to the field of wet metallurgy. According to the method, aluminium ash and a water solution with a certain pH value are mixed, and leaching is strengthened by ultrasonic wave to recycle aluminium oxide and chlorine salt under ventilating and stirring conditions. According to the method, the recycling efficiency is high; above 98% of chlorine salt and above 90% of aluminium oxide in the aluminium ash can be recycled after 1h reaction; the recycling technology is simple and environment-friendly; the leaching time is greatly shortened; the chlorine salt and aluminium oxide recycled by strengthening leaching under the ultrasonic wave can completely return an electrolytic cell for electrolysis or refining. The technology of recycling the aluminium oxide and the chlorine salt is simple; the direct cost is low; the method can be used for production practice on a large scale; particularly, under the condition that the existing aluminium industry is stagnant, the production cost of metallic aluminium can be directly reduced; the utilization rate of the aluminium ash is improved; and a new power is brought for the aluminium industry.
Description
Technical field
The present invention relates to a kind of method of efficient comprehensive reutilization aluminium ash, belong to metallurgical industry field.
Background technology
Aluminium is wide at occurring in nature distributed pole, and in the earth's crust, the content of aluminium is about 8%, is only second to oxygen and silicon, occupies the 3rd.But in the middle of various metallic element, aluminium ranks first.Aluminium is the second largest metal that output is only second to iron and steel.
Aluminium ash is the product of slag after cooling processing produced in electrolytic aluminum or cast aluminum-molykote composite material and aluminium scrap regenerative process.It is mainly derived from floating not molten inclusion with aluminium melt surface in fusion process, additive and and additive carries out physics, chemical reaction produces material.Because the slag that these materials produce with other heavy metal meltings is not identical, in loose grey scoriform, be therefore otherwise known as aluminium ash.Aluminium ash composition because of the raw material of each manufacturer and operational condition different and slightly change, but usually all contain metallic aluminium, the oxide compound of aluminium, nitride and carbide, salt, other metal oxide is (as Si0
2, MgO) and some other compositions.In addition, in founding or refining process use insulating covering agent, cause in aluminium ash containing a certain amount of muriate and fluorochemical.
Poisoning metal element (Se, As, Ba, Cd, Cr, Pb etc.) in aluminium ash enters soil and groundwater system and can cause serious heavy metal contamination, salt accumulation in salt-cake can cause salinization in soil, fire hazardous is held when ammonia, hydrogen and methane can be produced after aluminium ash contact water, the arsine gas produced after the impurity such as arsenic wherein and aluminium arsenide and water react not only polluted air after production site enrichment, also can cause the acute hydrogen arsenide poisoning of Close contacts.So, aluminium ash is effectively utilized to have a very big significance, at present, aluminium ash is applied in a lot, as Footwall drift aluminium, reclaim useful salt, the aluminum oxide reclaimed in aluminium ash, produce refractory materials, produce Brown Alundum, synthesized polymer aluminum chloride, produce Tai-Ace S 150, produce sorbent material, synthetic ink aluminum oxide, Load materials, as sweetening agent etc.
Owing to adding a large amount of slagging agents and refining agent in the production process of aluminium, make the content of chlorine element in aluminium ash very high.From the component of raw material, aluminium ash main component Al, Na, F, be the necessary raw material of electrolysis of aluminum, can be considered as the raw material of electrolytic aluminum.If aluminium ash is directly as the raw material of electrolytic aluminum, then muriate can affect the stability of electrolyte system, and NaCl forms Cl in electrolytic process simultaneously
2, affect the safety and environment protection in workshop.The inflammableness skimming produced in the salt slag, scum silica frost and the aluminium pyrometallurgical smelting process that produce in the first furnace slag produced in aluminium ash pyrogenic process smelting process, the crude aluminum refining course of processing is listed in " National Hazard refuse register " by national environmental protection portions in 2008 and development and the reform council.Therefore, how cost-effective comprehensive reutilization aluminium ash produces the important meaning by China's aluminum electrolysis industry.
At present, the domestic treatment process to aluminium ash is roughly divided into two classes: deepfreeze absorption method and thermal treatment absorption method.Deepfreeze absorption method uses vibratory screening apparatus to carry out screening process to aluminium ash, makes aluminium and the separating substances such as Al2O3, fluoride salt; Thermal treatment absorption method is placed on by the aluminium ash just clawed from smelting furnace to fry grey pot, and utilize the heat of aluminium ash self, stir-fry with machinery, in the process stir-fried, molten aluminium is little by little pooled to bottom iron pan, is then scooped out with steel spoon and casts aluminium ingot.But the present basic Dou Shi individual workship of the domestic process to aluminium ash, recovery method is simple, produces a large amount of dusts, serious environment pollution simultaneously.Therefore, current aluminium ash treatment technology chamber contamination environment is not recycle.
In forefathers not only exploratory development, it is also proposed the technology that much can fully utilize aluminium ash.Chinese patent (ZL201410500048.9, a kind of harmless process aluminium ash also prepares the method for sandy alumina, 2014.9.26) disclose a kind of harmless process aluminium ash and prepare the method for sandy alumina, key step is: remelting, alkali cleaning, drying and sintering, stripping, filtration purification, carbon decomposition, roasting, specifically grey for raw material with the aluminium produced in electrolysis of aluminum smelting and aluminium refining process, divide through recovery leaching aluminium, alkali cleaning removing impurities, soda ash sintering, sintered clinker stripping, sodium aluminate solution deep removal of impurities, carbon.After the operation process such as the roasting of aluminium hydroxide separation and abstersion, hydrogen-oxygen words aluminium, carbon dust mother liquid evaporation, obtain sandy alumina product.
Chinese patent (ZL200810115443.X, aluminium and muriatic method in a kind of extraction aluminium ash, 2008.6.24) a kind of aluminium and muriatic method in extraction aluminium ash is disclosed, comprise the following steps: the aluminium can only blamed after aluminium ash is melted by aluminium ash heating completely and with slag layering after, the sucking-off of aluminium liquid is directly sent to casting; The muriate of slag water logging being sent as an envoy in aluminium ash dissolves and enters in water, then carries out solid-liquid separation; Evaporation liquid phase obtains chloride crystallization, and solid phase is as raw material production aluminum oxide.Wherein the rate of recovery of metallic aluminium is greater than 85%, and the muriatic rate of recovery is greater than 80%.
But above-mentioned technology exists following deficiency: the harm not considering villaumite in (1) treating processes, comprehensive reutilization is not carried out to villaumite, both contaminate environment, waste resource; (2) in aluminium ash, the rate of recovery of villaumite is not high, only has about 80%; (2) technical process is complicated, less economical.
Summary of the invention
The present invention is directed to process aluminium ash in the past and can produce dust, flue dust causes environmental pollution, cost is higher, technical process is complicated, less economical problem, provides a kind of process aluminium ash, the method for efficient comprehensive reutilization aluminium ash, particularly to the recovery method of aluminum oxide and villaumite in aluminium ash, solve the problem of environmental pollution and cost increase.
The object of the present invention is to provide a kind of method of efficient comprehensive reutilization aluminium ash, specifically comprise the following steps:
A. aluminium ash is sized mixing in the ratio that liquid-solid ratio is 1:1-5:1 with the aqueous solution that pH value is 3-7, and carry out Strengthen education reaction under ultrasonic field, pass into air simultaneously;
The gas produced when B. leaching intensified by ultrasonic wave in steps A is collected, and obtains ammoniacal liquor with water absorption, both can solve problem of environmental pollution, and also can obtain product ammoniacal liquor;
C. solid-liquor separation is carried out to the slip that intensified by ultrasonic wave in steps A leaches, obtain leach liquor and leached mud;
D. carrying out condensing crystal to obtaining leach liquor in step C, obtaining the refining procedure that villaumite (villaumite mainly exists as sodium chloride) directly can return aluminium;
E. carry out washing to the leached mud obtained in step C to be separated, obtain clean slag and wash water, slag will be cleaned and dry as aluminum oxide, and the wash water obtained be returned in steps A and carries out intensified by ultrasonic wave leaching.
Preferably, hyperacoustic power described in steps A of the present invention is 100W-300W, and the Leaching reaction time is 1-5h.
Preferably, the temperature of condensing crystal described in step D of the present invention is 120-200 DEG C, and the sodium-chlor obtained can return electrorefining operation;
It is aluminum oxide that slag is cleaned in the oven dry obtained in step e, and aluminum oxide directly can return the electrowinning process of aluminium.
Wash water in step e directly can carry out intensified by ultrasonic wave leaching turning back in steps A, can recycle, solve waste water handling problem.
The invention has the beneficial effects as follows:
(1) many to the substance classes of carrying out comprehensive reutilization in aluminium ash: the AlN in aluminium ash, when intensified by ultrasonic wave leaches, can produce a large amount of ammonias, ammonia water is absorbed and can obtain product ammoniacal liquor; Recycle the aluminum oxide in aluminium ash, directly can turn back to electrowinning process, recycle the sodium-chlor in aluminium ash, directly can turn back to refining procedure, greatly reduce AlN, aluminum oxide and sodium-chlor are slatterned by as refuse.
(2) organic efficiency is high: the rate of recovery of sodium-chlor is more than 98%, and the rate of recovery of aluminum oxide is more than 90%.
(3) speed of response is fast: intensified by ultrasonic wave leaches and can reach above-mentioned organic efficiency in 1 hour.
(4) technical process is simple, and less investment, cost is low, environmental protection.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention is not limited to described content.
Embodiment 1
The method of efficient comprehensive reutilization aluminium ash described in the present embodiment, specifically comprises the following steps:
A. the aqueous solution being 3 by aluminium ash (containing the aluminum oxide of 20% and the muriate of 12.3%) and pH value is sized mixing in the ratio that liquid-solid ratio is 1:1, and under ultrasonic field (ultrasonic power is 100W), carry out Strengthen education reaction 1h, passes into air simultaneously;
The gas produced when B. leaching intensified by ultrasonic wave in steps A is collected, and obtains ammoniacal liquor with water absorption, both can solve problem of environmental pollution, and also can obtain product ammoniacal liquor;
C. solid-liquor separation is carried out to the slip that intensified by ultrasonic wave in steps A leaches, obtain leach liquor and leached mud;
D. carrying out condensing crystal (120 DEG C) to obtaining leach liquor in step C, obtaining the refining procedure that villaumite (villaumite mainly exists as sodium chloride) directly can return aluminium;
E. carry out washing to the leached mud obtained in step C to be separated, obtain clean slag and wash water, slag will be cleaned and dry as aluminum oxide, and the wash water obtained be returned in steps A and carries out intensified by ultrasonic wave leaching.
In the present embodiment, the rate of recovery of sodium-chlor is 98.1%, and the rate of recovery of aluminum oxide is 90.5%.
Embodiment 2
The method of efficient comprehensive reutilization aluminium ash described in the present embodiment, specifically comprises the following steps:
A. the aqueous solution being 4 by aluminium ash (containing the aluminum oxide of 15.5% and the muriate of 10.09%) and pH value is sized mixing in the ratio that liquid-solid ratio is 3:1, and under ultrasonic field (ultrasonic power is 200W), carry out Strengthen education reaction 2h, passes into air simultaneously;
The gas produced when B. leaching intensified by ultrasonic wave in steps A is collected, and obtains ammoniacal liquor with water absorption, both can solve problem of environmental pollution, and also can obtain product ammoniacal liquor;
C. solid-liquor separation is carried out to the slip that intensified by ultrasonic wave in steps A leaches, obtain leach liquor and leached mud;
D. carrying out condensing crystal (150 DEG C) to obtaining leach liquor in step C, obtaining the refining procedure that villaumite (villaumite mainly exists as sodium chloride) directly can return aluminium;
E. carry out washing to the leached mud obtained in step C to be separated, obtain clean slag and wash water, slag will be cleaned and dry as aluminum oxide, and the wash water obtained be returned in steps A and carries out intensified by ultrasonic wave leaching.
In the present embodiment, the rate of recovery of sodium-chlor is 98.4%, and the rate of recovery of aluminum oxide is 91.23%.
Embodiment 3
The method of efficient comprehensive reutilization aluminium ash described in the present embodiment, specifically comprises the following steps:
A. the aqueous solution being 7 by aluminium ash (containing the aluminum oxide of 13.1% and the muriate of 9.29%) and pH value is sized mixing in the ratio that liquid-solid ratio is 5:1, and under ultrasonic field (ultrasonic power is 300W), carry out Strengthen education reaction 2h, passes into air simultaneously;
The gas produced when B. leaching intensified by ultrasonic wave in steps A is collected, and obtains ammoniacal liquor with water absorption, both can solve problem of environmental pollution, and also can obtain product ammoniacal liquor;
C. solid-liquor separation is carried out to the slip that intensified by ultrasonic wave in steps A leaches, obtain leach liquor and leached mud;
D. carrying out condensing crystal (200 DEG C) to obtaining leach liquor in step C, obtaining the refining procedure that villaumite (villaumite mainly exists as sodium chloride) directly returns aluminium;
E. carry out washing to the leached mud obtained in step C to be separated, obtain clean slag and wash water, slag will be cleaned and dry as aluminum oxide, and the wash water obtained be returned in steps A and carries out intensified by ultrasonic wave leaching.
In the present embodiment, the rate of recovery of sodium-chlor is 98.88%, and the rate of recovery of aluminum oxide is 91.93%.
Embodiment 4
The method of efficient comprehensive reutilization aluminium ash described in the present embodiment, specifically comprises the following steps:
A. the aqueous solution being 4 by aluminium ash (containing the aluminum oxide of 21.3% and the muriate of 7.3%) and pH value is sized mixing in the ratio that liquid-solid ratio is 5:1, and under ultrasonic field, (ultrasonic power is 300W) carries out Strengthen education reaction 1h, passes into air simultaneously;
The gas produced when B. leaching intensified by ultrasonic wave in steps A is collected, and obtains ammoniacal liquor with water absorption, both can solve problem of environmental pollution, and also can obtain product ammoniacal liquor;
C. solid-liquor separation is carried out to the slip that intensified by ultrasonic wave in steps A leaches, obtain leach liquor and leached mud;
D. carrying out condensing crystal (150 DEG C) to obtaining leach liquor in step C, obtaining the refining procedure that villaumite (villaumite mainly exists as sodium chloride) directly can return aluminium;
E. carry out washing to the leached mud obtained in step C to be separated, obtain clean slag and wash water, slag will be cleaned and dry as aluminum oxide, and the wash water obtained be returned in steps A and carries out intensified by ultrasonic wave leaching.
In the present embodiment, the rate of recovery of sodium-chlor is 99.21%, and the rate of recovery of aluminum oxide is 94.43%.
Embodiment 5
The method of efficient comprehensive reutilization aluminium ash described in the present embodiment, specifically comprises the following steps:
A. the aqueous solution being 4 by aluminium ash (containing the aluminum oxide of 10.3% and the muriate of 9.43%) and pH value is sized mixing in the ratio that liquid-solid ratio is 3:1, and under ultrasonic field, (200W) carries out Strengthen education reaction 2h, passes into air simultaneously;
The gas produced when B. leaching intensified by ultrasonic wave in steps A is collected, and obtains ammoniacal liquor with water absorption, both can solve problem of environmental pollution, and also can obtain product ammoniacal liquor;
C. solid-liquor separation is carried out to the slip that intensified by ultrasonic wave in steps A leaches, obtain leach liquor and leached mud;
D. carry out condensing crystal (180 DEG C) to obtaining leach liquor in step C, obtain villaumite, the villaumite obtained mainly exists as sodium chloride, and sodium-chlor directly can return the refining procedure of aluminium;
E. carry out washing to the leached mud obtained in step C to be separated, obtain clean slag and wash water, slag will be cleaned and dry as aluminum oxide, and the wash water obtained be returned in steps A and carries out intensified by ultrasonic wave leaching.
In the present embodiment, the rate of recovery of sodium-chlor is 99.01%, and the rate of recovery of aluminum oxide is 92.83%.
Claims (4)
1. a method for efficient comprehensive reutilization aluminium ash, is characterized in that, specifically comprise the following steps:
A. aluminium ash is sized mixing in the ratio that liquid-solid ratio is 1:1-5:1 with the aqueous solution that pH value is 3-7, and carry out Strengthen education reaction under ultrasonic field, pass into air simultaneously;
The gas produced when B. leaching intensified by ultrasonic wave in steps A is collected, and obtains ammoniacal liquor with water absorption;
C. solid-liquor separation is carried out to the slip that intensified by ultrasonic wave in steps A leaches, obtain leach liquor and leached mud;
D. carrying out condensing crystal to obtaining leach liquor in step C, obtaining the refining procedure that villaumite directly can return aluminium;
E. carry out washing to the leached mud obtained in step C to be separated, obtain clean slag and wash water, slag will be cleaned and dry as aluminum oxide, and the wash water obtained be returned in steps A and carries out intensified by ultrasonic wave leaching.
2. the method for efficient comprehensive reutilization aluminium ash according to claim 1, it is characterized in that: hyperacoustic power range described in steps A is 100W-300W, the Leaching reaction time is 1-5h.
3. the method for efficient comprehensive reutilization aluminium ash according to claim 1, is characterized in that: the temperature of condensing crystal described in step D is 120-200 DEG C.
4. the method for efficient comprehensive reutilization aluminium ash according to claim 1, is characterized in that: the aluminum oxide obtained in step e directly can return the electrowinning process of aluminium.
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| CN115323173A (en) * | 2022-07-06 | 2022-11-11 | 福建有道贵金属材料科技有限公司 | Cyanide-free recovery method of solid waste containing precious metals |
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