CN115818691A - Method for processing and recycling solid waste of aluminum hydroxide-containing industrial sludge - Google Patents
Method for processing and recycling solid waste of aluminum hydroxide-containing industrial sludge Download PDFInfo
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- CN115818691A CN115818691A CN202211561324.3A CN202211561324A CN115818691A CN 115818691 A CN115818691 A CN 115818691A CN 202211561324 A CN202211561324 A CN 202211561324A CN 115818691 A CN115818691 A CN 115818691A
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- aluminum hydroxide
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- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000002910 solid waste Substances 0.000 title claims abstract description 47
- 239000010802 sludge Substances 0.000 title claims abstract description 44
- 238000012545 processing Methods 0.000 title claims abstract description 25
- 238000004064 recycling Methods 0.000 title claims abstract description 22
- 238000005245 sintering Methods 0.000 claims abstract description 33
- 239000002699 waste material Substances 0.000 claims abstract description 31
- 239000013078 crystal Substances 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 238000001354 calcination Methods 0.000 claims abstract description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 13
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 12
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 9
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 claims description 8
- 235000012241 calcium silicate Nutrition 0.000 claims description 8
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000012452 mother liquor Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 29
- 229910052742 iron Inorganic materials 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 9
- 238000002386 leaching Methods 0.000 abstract description 5
- 229910001570 bauxite Inorganic materials 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000004131 Bayer process Methods 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002223 garnet Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 1
- JCCZVLHHCNQSNM-UHFFFAOYSA-N [Na][Si] Chemical compound [Na][Si] JCCZVLHHCNQSNM-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of waste processing, and discloses a method for processing and recycling solid waste containing aluminum hydroxide industrial sludge, which comprises the following steps: step one, collecting solid waste of aluminum hydroxide industrial sludge, and pretreating the solid waste of the aluminum hydroxide industrial sludge to obtain a waste material I; step two, conveying the waste material I to a drying kiln for material calcination, and performing sintering treatment to obtain a waste material II; step three, crystallizing the material to obtain a first crystal; step four, dehydrating the material to obtain a second crystal; and step five, reducing the crystal III to obtain aluminum hydroxide, so that aluminum oxide and iron in the high-iron bauxite can be effectively leached, the leaching rate of the aluminum oxide can reach more than 89%, and the leaching rate of the iron can reach more than 90%. The process flow realizes the circulation of alkali, and the whole process does not discharge waste gas, waste liquid and waste residue.
Description
Technical Field
The invention relates to the technical field of waste processing, in particular to a method for processing and recycling solid waste containing aluminum hydroxide industrial sludge.
Background
In the processing process of aluminum alloy, aluminum-magnesium alloy and aluminum-containing workpieces, the surface of a metal material is processed by a chemical method, so that the aluminum hydroxide-containing industrial sludge is formed. The main component is aluminium hydroxide, and the current treatment method is special deep-buried treatment in a refuse dump. The treatment method eliminates the pollution of industrial waste on the surface, but does not solve the problem of industrial waste fundamentally. The method has the advantages that the solid waste containing the aluminum hydroxide industrial sludge is deeply processed and reused, waste is changed into valuable, the industrial solid waste is solved, and the realization of recycling is an important development direction of sustainable development in China.
At present, the process of processing and recycling the industrial sludge solid waste containing the aluminum hydroxide mainly comprises the scheme of firstly extracting the aluminum oxide by a Bayer process and then extracting iron by sintering Bayer process red mud; firstly, extracting iron in the iron-smelting slag by blast furnace smelting, and then extracting aluminum oxide in the iron-smelting slag by dissolving calcium aluminate in alkali liquor; the iron and the aluminum are separated through the processes of magnetizing roasting, magnetic separation and the like, and the scheme of 'magnetic separation and iron removal' and the like are respectively utilized. However, the high-iron bauxite has high active silicon, so the direct treatment effect by the Bayer process is poor and the alkali consumption is large; the adoption of the scheme of firstly iron and then aluminum and the magnetic roasting has high energy consumption and poor economy, and the problems of difficult desilication, low extraction rate of aluminum oxide and the like in the process of leaching the aluminum oxide from the blast furnace smelting slag exist in the scheme of firstly iron and then aluminum.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for processing and recycling solid waste containing aluminum hydroxide industrial sludge.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the method for processing and recycling the solid waste of the aluminum hydroxide-containing industrial sludge comprises the following steps:
step one, collecting solid waste of the aluminum hydroxide industrial sludge, and pretreating the solid waste of the aluminum hydroxide industrial sludge to obtain a waste material I;
step two, conveying the waste material I to a drying kiln for material calcination, and performing sintering treatment to obtain a waste material II;
step three, crystallizing the material to obtain a first crystal;
step four, dehydrating the material to obtain a second crystal;
and step five, carrying out reduction treatment on the crystal III to obtain the aluminum hydroxide.
Preferably, the pretreatment of the first step includes: cleaning, separating, drying and cooling;
the method comprises the following specific steps: 1. putting the solid waste of the aluminum hydroxide industrial sludge into clear water or washing the solid waste by a clear water washing mode;
2. putting the washed aluminum hydroxide industrial sludge solid waste into a centrifugal machine, a shaking machine and a screening machine for separation treatment;
3. after the separation is finished, drying the residual aluminum hydroxide industrial sludge solid waste;
4. and (3) cooling the dried aluminum hydroxide industrial sludge solid waste in a natural environment or a ventilation environment to obtain the first waste.
Preferably, the rotation speed of the centrifuge is 400-500r/min, and the drying temperature is 80-100 ℃.
Preferably, the specific steps of the second step are as follows:
and (3) feeding the first waste material into a drying kiln, and sintering aluminum hydroxide in the first waste material in a turnover heating and drying mode, wherein the sintering temperature is 200-350 ℃.
Preferably, the sintering is divided into two stages: the first-stage sintering temperature is 280 ℃, and the sintering time is 2-3h; the second-stage sintering temperature is 320 ℃, and the sintering time is 5-6h.
Preferably, the third step comprises the following specific steps:
1) Mixing the waste II with sodium carbonate and lime according to a certain proportion;
2) And sintering the mixed ingredients in a rotary kiln to form clinker, namely a crystal I.
Preferably, the specific steps of the fourth step are as follows:
1) Dissolving clinker and dilute alkali; .
2) Calcium orthosilicate, calcium titanate and Fe in clinker 2 O 3 ·H 2 Discharging red mud formed by O and the like;
3) Desiliconizing to form crystal II, discharging the crystal II and residual sodium aluminate solution.
Preferably, the specific steps of the fifth step are as follows:
introducing CO into the sodium aluminate solution 2 Adding crystal seeds into the gas, stirring to obtain aluminum hydroxide precipitate and mother liquor with the main component of sodium carbonate, and discharging the precipitate, namely crystal III.
Preferably, the clinker is made of aluminic acidSodium (Na) 2 O·Al 2 O 3 ) Sodium ferrite (Na) 2 O·Fe 2 O 3 ) Calcium orthosilicate (2 CaO. SiO) 2 ) And sodium titanate (CaO. TiO) 2 ) And (4) forming.
(III) advantageous effects
Compared with the prior art, the invention provides the method for processing and recycling the solid waste containing the aluminum hydroxide industrial sludge, which has the following beneficial effects:
1. the method for processing and recycling the solid waste containing the aluminum hydroxide industrial sludge can effectively leach aluminum oxide and iron in the high-iron bauxite, the leaching rate of the aluminum oxide can reach more than 89%, and the leaching rate of the iron can reach more than 90%. The process flow realizes the circulation of alkali, and the whole process does not discharge waste gas, waste liquid and waste residue.
2. The method for processing and recycling the solid waste containing the aluminum hydroxide industrial sludge adopts a low-alkali ratio formula in clinker sintering and adopts a two-stage grinding material and a low-molecular ratio solution in a clinker dissolving process to inhibit side reaction loss during dissolving so as to enable Na in the clinker to be 2 O and Al 2 O 3 The dissolution rates of the components reach 94-96% and 92-94% respectively. Al (Al) 2 O 3 The total recovery of (A) is about 90%, na per ton of alumina 2 CO 3 The consumption of (2) is about 95 kg. The soda lime sintering method can treat low-grade ore which cannot be economically utilized by the Bayer process, the aluminum-silicon ratio of the low-grade ore can be as low as 3.5, and the raw materials are better in comprehensive utilization and have the characteristics.
3. The method for processing and recycling the solid waste containing the aluminum hydroxide industrial sludge is recovered in the subsequent procedure of aluminum oxide production, does not need to return to the ore blending procedure, is directly conveyed to the subsequent desilication procedure for desilication after dissolution, greatly reduces the repeated processing cost caused by the procedures of preparation, sintering, dissolution and the like of slurry, and obviously reduces the production cost.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for processing and recycling the solid waste of the aluminum hydroxide-containing industrial sludge comprises the following steps:
step one, collecting solid waste of aluminum hydroxide industrial sludge, and pretreating the solid waste of the aluminum hydroxide industrial sludge to obtain a waste material I; the pretreatment comprises the following steps: cleaning, separating, drying and cooling;
the method comprises the following specific steps: 1. putting the solid waste of the aluminum hydroxide industrial sludge into clear water or washing the solid waste by a clear water washing mode;
2. putting the washed aluminum hydroxide industrial sludge solid waste into a centrifugal machine, a shaking machine and a screening machine for separation treatment;
3. after the separation is finished, drying the residual aluminum hydroxide industrial sludge solid waste;
4. and (3) cooling the dried aluminum hydroxide industrial sludge solid waste in a natural environment or a ventilation environment to obtain the first waste.
The rotation speed of the centrifuge is 400-500r/min, and the drying temperature is 80-100 DEG C
Step two, conveying the waste material I to a drying kiln for material calcination, and performing sintering treatment to obtain a waste material II; and (3) feeding the first waste material into a drying kiln, and sintering aluminum hydroxide in the first waste material in a turnover heating and drying mode, wherein the sintering temperature is 200-350 ℃.
The sintering is divided into two sections: the first-stage sintering temperature is 280 ℃, and the sintering time is 2-3h; the second stage sintering temperature is 320 ℃, and the sintering time is 5-6h
Step three, crystallizing the material to obtain a first crystal; the method comprises the following specific steps:
1) Mixing the waste II with sodium carbonate and lime according to a certain proportion;
2) And sintering the mixed ingredients in a rotary kiln to form clinker, namely crystal I.
The clinker is prepared from sodium aluminate (Na) 2 O·Al 2 O 3 ) Sodium ferrite (Na) 2 O·Fe 2 O 3 ) Calcium orthosilicate (2 CaO. SiO) 2 ) And sodium titanate (CaO. TiO) 2 ) And (4) forming.
Step four, dehydrating the material to obtain a second crystal; the method comprises the following specific steps:
1) Dissolving clinker with dilute alkali; .
2) Calcium orthosilicate, calcium titanate and Fe in clinker 2 O 3 ·H 2 Discharging red mud consisting of O and the like;
3) Desiliconizing to form crystal II, discharging the crystal II and residual sodium aluminate solution.
Step five, carrying out reduction treatment on the crystal III to obtain aluminum hydroxide, which comprises the following specific steps:
introducing CO into the sodium aluminate solution 2 Adding crystal seeds into the gas, stirring to obtain aluminum hydroxide precipitate and mother liquor with the main component of sodium carbonate, and discharging the precipitate, namely crystal III.
Mixing the solid waste of aluminum hydroxide industrial sludge, sodium carbonate and lime according to a certain proportion, sintering in a rotary kiln to obtain sodium aluminate (Na) 2 O·Al 2 O 3 ) Sodium ferrite (Na) 2 O·Fe 2 O 3 ) Calcium orthosilicate (2 CaO. SiO) 2 ) And sodium titanate (CaO. TiO) 2 ) The clinker is dissolved out by dilute alkali solution, naOH obtained by hydrolysis of sodium ferrite also enters the solution, and calcium orthosilicate does not react with sodium aluminate solution in large quantity and reacts with calcium titanate and Fe if dissolution conditions are properly controlled 2 O 3 ·H 2 Discharging red mud composed of O and the like, and carrying out a special desiliconization process on a sodium aluminate solution obtained by dissolving out clinker to obtain SiO 2 O forms hydrated sodium aluminosilicate (called sodium-silicon slag) or hydrated garnet 3 CaO. Al 2 O 3 ·xSiO 2 ·(6-2x)H 2 O precipitation (where x. Apprxeq.0.1), purification of the solution, and purification of CO 2 Introducing gas into refined sodium aluminate solution, adding crystal seed, stirring to obtain aluminium hydroxide precipitate and mother liquor containing sodium carbonate as main component, calcining aluminium hydroxideBecomes alumina finished product, al in hydrated garnet 2 O 3 Can further contain Na 2 CO 3 And (5) extracting and recovering mother liquor.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The method for processing and recycling the solid waste containing the aluminum hydroxide industrial sludge is characterized by comprising the following steps: the method comprises the following steps:
step one, collecting solid waste of aluminum hydroxide industrial sludge, and pretreating the solid waste of the aluminum hydroxide industrial sludge to obtain a waste material I;
step two, conveying the waste material I to a drying kiln for material calcination, and performing sintering treatment to obtain a waste material II;
step three, crystallizing the material to obtain a first crystal;
step four, dehydrating the material to obtain a second crystal;
and step five, carrying out reduction treatment on the crystal III to obtain the aluminum hydroxide.
2. The method for processing and recycling the solid waste of the aluminum hydroxide-containing industrial sludge according to claim 1, wherein the method comprises the following steps: the pretreatment of the first step comprises the following steps: cleaning, separating, drying and cooling;
the method comprises the following specific steps:
1) Putting the solid waste of the aluminum hydroxide industrial sludge into clear water or washing the solid waste in a clear water washing mode;
2) Putting the washed aluminum hydroxide industrial sludge solid waste into a centrifugal machine, a shaking machine and a screening machine for separation treatment;
3) After the separation is finished, drying the residual aluminum hydroxide industrial sludge solid waste;
4) And cooling the dried aluminum hydroxide industrial sludge solid waste in a natural environment or a ventilation environment to obtain the first waste.
3. The method for processing and recycling industrial sludge solid waste containing aluminum hydroxide according to claim 2, characterized in that: the rotation speed of the centrifuge is 400-500r/min, and the drying temperature is 80-100 ℃.
4. The method for processing and recycling the solid waste of the aluminum hydroxide-containing industrial sludge according to claim 1, wherein the method comprises the following steps: the second step comprises the following specific steps:
and (3) feeding the first waste material into a drying kiln, and sintering aluminum hydroxide in the first waste material in a turnover heating and drying mode, wherein the sintering temperature is 200-350 ℃.
5. The method for processing and recycling the solid waste of the aluminum hydroxide-containing industrial sludge according to claim 4, wherein the method comprises the following steps: the sintering is divided into two sections: the first-stage sintering temperature is 280 ℃, and the sintering time is 2-3h; the second-stage sintering temperature is 320 ℃, and the sintering time is 5-6h.
6. The method for processing and recycling industrial sludge solid waste containing aluminum hydroxide according to claim 1, characterized in that: the third step comprises the following specific steps:
1) Mixing the waste II with sodium carbonate and lime according to a certain proportion;
2) And sintering the mixed ingredients in a rotary kiln to form clinker, namely crystal I.
7. The method for processing and recycling the solid waste of the aluminum hydroxide-containing industrial sludge according to claim 1, wherein the method comprises the following steps: the fourth step comprises the following specific steps:
1) Dissolving clinker with dilute alkali; .
2) Calcium orthosilicate, calcium titanate and Fe in clinker 2 O 3 ·H 2 O and the like to form red mudDischarging;
3) Desiliconizing to form crystal II, discharging the crystal II and residual sodium aluminate solution.
8. The method for processing and recycling the solid waste of the aluminum hydroxide-containing industrial sludge according to claim 1, wherein the method comprises the following steps: the concrete steps of the fifth step are as follows:
introducing CO into the sodium aluminate solution 2 Adding seed crystal into the gas, stirring to obtain aluminum hydroxide precipitate and mother liquor containing sodium carbonate as main component, and discharging the precipitate, i.e. crystal III.
9. The method for processing and recycling the solid waste of the aluminum hydroxide-containing industrial sludge according to claim 1, wherein the method comprises the following steps: the clinker is composed of sodium aluminate, sodium ferrite, calcium orthosilicate and sodium titanate.
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