CN106278373B - Utilize the water-permeable brick and preparation method thereof of heavy metal sewage sludge preparation - Google Patents
Utilize the water-permeable brick and preparation method thereof of heavy metal sewage sludge preparation Download PDFInfo
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- CN106278373B CN106278373B CN201610663310.0A CN201610663310A CN106278373B CN 106278373 B CN106278373 B CN 106278373B CN 201610663310 A CN201610663310 A CN 201610663310A CN 106278373 B CN106278373 B CN 106278373B
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- sludge
- heavy metal
- hydrolysis solution
- water
- permeable brick
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 83
- 239000011449 brick Substances 0.000 title claims abstract description 57
- 239000010801 sewage sludge Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000010802 sludge Substances 0.000 claims abstract description 78
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000002893 slag Substances 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000006004 Quartz sand Substances 0.000 claims abstract description 19
- 239000010881 fly ash Substances 0.000 claims abstract description 18
- 239000004575 stone Substances 0.000 claims abstract description 17
- 239000011148 porous material Substances 0.000 claims abstract description 16
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 15
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 13
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 13
- 241001330002 Bambuseae Species 0.000 claims abstract description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 13
- 239000011425 bamboo Substances 0.000 claims abstract description 13
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 12
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000005903 acid hydrolysis reaction Methods 0.000 claims description 53
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 51
- 239000007788 liquid Substances 0.000 claims description 29
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 28
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 28
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000002699 waste material Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 15
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 14
- 239000013078 crystal Substances 0.000 claims description 14
- 229910017604 nitric acid Inorganic materials 0.000 claims description 14
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 13
- 239000011790 ferrous sulphate Substances 0.000 claims description 13
- 150000002500 ions Chemical class 0.000 claims description 13
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 13
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 13
- 230000010355 oscillation Effects 0.000 claims description 10
- 238000010792 warming Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000002604 ultrasonography Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000002525 ultrasonication Methods 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 239000010903 husk Substances 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 6
- 239000000284 extract Substances 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000007670 refining Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 37
- 238000000034 method Methods 0.000 description 20
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 230000035699 permeability Effects 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 235000021110 pickles Nutrition 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 238000002386 leaching Methods 0.000 description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000000845 anti-microbial effect Effects 0.000 description 3
- 206010003549 asthenia Diseases 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002920 hazardous waste Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000003755 preservative agent Substances 0.000 description 3
- 230000002335 preservative effect Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- RPAJSBKBKSSMLJ-DFWYDOINSA-N (2s)-2-aminopentanedioic acid;hydrochloride Chemical class Cl.OC(=O)[C@@H](N)CCC(O)=O RPAJSBKBKSSMLJ-DFWYDOINSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/138—Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Combustion & Propulsion (AREA)
- Wood Science & Technology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind of water-permeable bricks and preparation method thereof using heavy metal sewage sludge preparation, water-permeable brick includes following components and parts by weight content: innoxious sludge 40-45, common stone 20-23, steel slag 15-18, flyash 8-10, waterglass 12-15, quartz sand 10-12, kaolin 5-8, bamboo powder 3-4 and pore creating material 1-3, wherein, innoxious sludge is obtained after being handled by heavy metal sewage sludge, preparation process includes heavy metal sewage sludge acidolysis, heavy metal sewage sludge ultrasonic Separation, ferrite and innoxious sludge extract, the mixing of water-permeable brick raw material, green brick forming, brick bat drying, adobe roasting and etc..Compared with prior art, the present invention is while heavy metal sewage sludge is innoxious, extract ferrite product and innoxious sludge, the former can be used as the Iron Ore Powder before radiation shielding coating additive or steel-refining, the latter can be used for the preparation of sponge urban construction water-permeable brick, the useless rate of benefit is high, and the maximum resourceization for realizing heavy metal sewage sludge utilizes.
Description
Technical field
The invention belongs to solid hazardous waste recycling and the field of building materials in environmental project, more particularly, to one
The water-permeable brick and preparation method thereof that kind is prepared using heavy metal sewage sludge.
Background technique
Heavy metal sewage sludge is mainly derived from the waste water such as electroplating industry, metal finishing industry, printed circuit board industry
The sludged waste material containing heavy metal generated after reason, the 17th class hazardous waste being put into National Hazard waste list
(HW17).Since the heavy metals such as Cu, Ni, Cr, Zn, Fe in above-mentioned industry waste water are transferred in sludge, it is heavy metal-polluted
Mud is electroplating wastewater " final state object ", have the characteristics that easily accumulate, it is unstable, be easy to run off, if do not dealt carefully with, any heap
It puts, the heavy metals such as Cu, Ni, Zn, Cr, Fe in sludge are under rain leaching or other effects, it will along one soil of sludge
The Path Migration of one crops of earth, one human body, and may cause the secondary pollution of surface water, soil, underground water, or even jeopardize life
Object chain causes serious environmental disruption.
The characteristics of for heavy metal sewage sludge and its harmfulness are examined from the angle of environmental pollution prevention and control and resource circulation utilization
Consider, mainly use following two processing mode, first is that after treatment, so that sludge is not caused secondary pollution so fill or
Storage, i.e. harmlessness disposing；Second is that making to carry out synthetical recovery, i.e. resource utilization to the heavy metal resources in sludge.Current nothing
The method of evilization disposition has curing agent to solidify, fill, burn and fill out sea；Wherein curing technology is one in hazardous waste processing
Important technology there are curing materials to be easy to get, high treating effect, advantage at low cost, i.e., fix the huge sum of money in sludge with curing agent
Belong to, then processes again, but there are still certain leaching hidden danger；Landfill is that comparison is suitble to a danger of China's actual conditions useless
Object harmlessness disposing approach, but the domestic Landfill for heavy metal sewage sludge is still in lower level；Sea is thrown actually to belong to
In the transfer of pollutant, even across solidification, the threat caused by marine ecosystems and human health is heavy metal sewage sludge
It is difficult to avoid that, the world is forbidden already；Burning heat treatment is to realize that heavy metal sewage sludge minimizing, innoxious one kind is quick, has
The technology of effect still since this method energy consumption is higher, there are certain requirements burning facility and condition, and general small electroplate factory is difficult
To bear huge processing cost, therefore hardly result in the popularization of large area.
Due to the aggravation of resource dilution and environmental pollution, heavy metal sewage sludge is returned as a kind of important heavy metal resources
It receives and utilizes, be always the emphasis studied both at home and abroad.Wherein, main method have recycling heavy metal, ferrite comprehensive utilization technique,
Composting makes fertilizer and production modified plastics product.Chinese patent " a kind of heavy metal-polluted mud resource and nothing
The processing method of evilization " (CN102433437B) disclose it is a kind of by heavy metal sewage sludge dehydration, it is dry after with flux, binder into
Row ingredient, clamp dog or ball processed, then coke, block or spherical material are put into smelting furnace and carry out melting；The technique is not in sludge
Heavy metal be recycled.Chinese patent " the full recycling treatment system of heavy metal sewage sludge " (CN203833780U) develops
A kind of full recycling treatment system of heavy metal sewage sludge can effectively take out many useful components contained in heavy metal sewage sludge etc. again sharp
With, but do not consider how the residue after extracting utilizes；Chinese patent " alkaline sludge containing heavy metal recycling processing method "
(CN201245054) it proposes one kind and extracts the resources such as tapping oxygen crystal and calcium sulfate from heavy metal alkaline sludge, but this is heavy
In metal alkaline sludge other than producing iron oxygen crystal, sodium sulphate, calcium sulfate, still there is the generation such as acid non-soluble substance, after washing
Acid non-soluble substance etc. is innoxious, general to bury, but full resource utilization has not yet been reached in this.Chinese publication is " at a kind of collaboration
The huge sum of money for being 20~50% by moisture content using synergistic effect in the method for setting heavy metal sewage sludge " (Publication No. 105271624A)
Belong to sludge and calcium-based absorbents mix, is dry, crushing, obtains calcium base sludge, then mix with basic raw materials for sintering and dedusting ash, make
Grain, cloth, are finally sintered, obtain sinter；Patent applicant is Baosteel Stainless Steel Co., Ltd., and the method is because of ground system
Preferably, its industrial chain is taken full advantage of, but is not suitable for promoting the use of.
" sponge city " is theory and the direction of urban construction, that is, refers to that city can become as sponge adapting to environment
Change and cope with natural calamity etc. has good " elasticity ", and water suction, water storage, infiltration, water purification when raining will store when needing
Water " release " and be used.Existing town road road surface mostly uses the impermeable materials such as cement concrete, pitch to spread
The ponding that will form large area if forming, when rainy has been not suitable with the theory of sponge urban development.And water-permeable brick is meeting substantially
Road hardening, it is smooth while, also have good permeable and performance of keeping humidity, natural precipitation can be absorbed, and enter underground
Water system forms good circulation.Therefore, the innoxious sludge after heavy metal sewage sludge being extracted ferrite is built as sponge city
If there is good environmental benefit and economic benefit with a kind of main raw material(s) of water-permeable brick.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of using heavy metal-polluted
Clay standby compression strength is high, water permeability is good, energy conservation and environmental protection and water-permeable brick of Antimicrobial preservative and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of water-permeable brick prepared using innoxious sludge, including following components and parts by weight content:
Innoxious sludge 40-45, common stone 20-23, steel slag 15-18, flyash 8-10, waterglass 12-15, quartz sand
10-12, kaolin 5-8, bamboo powder 3-4 and pore creating material 1-3.
The steel slag and quartz sand crosses 10 meshes, partial size≤0.15mm of the flyash.
The pore creating material is perlite, diatomite, rice husk or boils stone.
The preparation method that water-permeable brick is prepared using innoxious sludge, specifically includes the following steps:
(1) acid hydrolysis solution stirring is added in heavy metal sewage sludge, reacts heavy metal ion with acid and is leached, pH in system
When being adjusted to 2.2-3.2, acidolysis reaction terminates；
(2) mixed liquor of step (1) is subjected to ultrasonication, sludge and acid hydrolysis solution is made to come into full contact with and react；
(3) mixed liquor after ultrasound in step (2) is separated by solid-liquid separation, obtains acid hydrolysis solution and remains the dirt of acid hydrolysis solution
Mud；
(4) sludge of residual acid hydrolysis solution in step (3) is rinsed with clear water, sloughs remaining acid hydrolysis solution and heavy metal,
Obtain innoxious sludge；
(5) liquid generated after the acid hydrolysis solution and the middle sludge for rinsing residual acid hydrolysis solution of step (4) in step (3) is carried out
Ferrous sulfate is added in mixing, is uniformly mixed and heats, adds lye, and be passed through oxygen, sufficiently generates after reaction containing iron member
The ferrite crystal of element and heavy metal ion, ferrite crystal are separated with alkaline waste liquor, are dried, and obtain ferrite, alkaline waste liquor
Handle qualified discharge；
(6) the innoxious sludge for obtaining step (4) and common stone, steel slag, flyash, waterglass, quartz sand, kaolinite
Soil, bamboo powder and pore creating material stir into pug after mixing by charge ratio, and control moisture content；
(7) pug of step (6) is put into dry-pressing formed machine is dry-pressing formed, the water-permeable brick brick of different shape and size is made
Base；
(8) permeable brick adobe obtained in step (7) is dry by spontaneously drying or being put into drying box；
(9) the permeable brick adobe of step (8) after dry is sintered to get water-permeable brick is arrived.
Acid hydrolysis solution described in step (1) is the mixture of sulfuric acid, nitric acid, hydrofluoric acid and hydrogen peroxide, sulfuric acid, nitric acid, hydrogen fluorine
8-10:2-4:2-4:1 is prepared by volume for acid and hydrogen peroxide, and the volume that acid hydrolysis solution is added is the 30- of heavy metal sewage sludge volume
50%.
The frequency of oscillation of ultrasonic wave described in step (2) is 15-30KHz, duration of oscillation 1-2h, and step (4) is described clear
The number that water rinses is 3-5 times.
The additive amount of ferrous sulfate described in step (5) is 8-12 times of heavy metal gross mass in liquid, heats liquid temperature
Degree is to 55-65 DEG C, and the lye is NaOH or KOH, and the pH value that lye amount is added to liquid is 8.5-9.
The moisture control of step (6) described pug is in 14-18wt%, the pressure of dry-pressing formed machine described in step (7)
For 25-35Mpa.
Drying box described in step (8) is thermostatic drying chamber, and temperature is 103-108 DEG C, it is dry after adobe moisture content not
Greater than 6wt%.
It is warming up to 1020-1150 DEG C with the speed of 3.5-4.0 DEG C/min when step (9) is sintered, is persistently sintered 2.5-3.5h
After be down to room temperature.
Compared with prior art, the invention has the following advantages that
1, heavy metal sewage sludge by can extract after acidolysis, ultrasonic separation, ferrous sulfate and salkali waste curing heavy metal first
Ferrite can also be using remaining innoxious sludge as preparation as the Iron Ore Powder before radiation shielding coating additive or steel-refining
The raw material of sponge urban construction water-permeable brick maximize the recycling for realizing resource；
2, the water-permeable brick of this method preparation, due to joined steel slag, common stone as coarse aggregate, innoxious sludge, powder
Coal ash has high intensity, high temperature resistant, corrosion resistant characteristic as binder, quartz sand as fine aggregate, waterglass, and kaolin has
Viscosity and high temperature resistant, bamboo powder can Antimicrobial preservative, be also added into pore creating material, therefore last water-permeable brick compression strength obtained is high, thoroughly
It is aqueous good, there is the excellent performance of absorbing sound and lowering noise and Antimicrobial preservative, meets " water-permeable brick " (CJ/T945~2005) professional standard,
Simultaneously it is low in cost, can industrialized production, responded sponge the idea of the city, can be used as Building wood important in sponge urban construction
Material；
3, the acid hydrolysis solution that this method is formulated using certain proportion sulfuric acid, nitric acid, hydrofluoric acid and hydrogen peroxide is to heavy metal
Sludge carries out thorough acidolysis, and wherein sulfuric acid plays main resolution, and hydrogen peroxide oxidation can remove organic matter a small amount of in sludge, add
The nitric acid and hydrofluoric acid entered can be improved digestion condition, accelerates oxidation rate and improve resolution effect, it ensure that subsequent water-permeable brick
Sludge is innoxious in raw material, and then ensure that the water-permeable brick of preparation is harmless, environmentally friendly；
4, invention is suitble to the various sludge containing heavy metal ion of processing, and not only versatility is good for this method, and process conditions are simple,
Strong operability can more realize large-scale production, be a kind for the treatment of of wastes with processes of wastes against one another, and energy-saving and emission-reduction, innoxious and resource regeneration contain
The processing technique of heavy metal sewage sludge.
The present invention extracts ferrite product and innoxious sludge, Qian Zheke while heavy metal sewage sludge harmless treatment
As the Iron Ore Powder before radiation shielding coating additive or steel-refining, the latter can be used for the preparation of sponge urban construction water-permeable brick,
The water-permeable brick that compression strength is high, water permeability is good and durable can be made, suitable for the road surface in sponge urban construction
It is laid with.The present invention can largely dissolve heavy metal sewage sludge, and after extracting ferrite, innoxious sludge is alternatively arranged as water-permeable brick preparation
Main raw material(s), the useless rate of benefit is high, and the maximum resourceization for realizing heavy metal sewage sludge utilizes.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
For handling East China automobile electroplating workshop heavy metal sewage sludge, implementation steps are further described, technique
Flow chart is as shown in Figure 1.
Step 1: heavy metal sewage sludge of the 100Kg moisture content not less than 60% is weighed in acidolysis slot, according to heavy metal sewage sludge
Volume 30% be added acid hydrolysis solution, acid hydrolysis solution is with sulfuric acid: nitric acid: hydrofluoric acid: hydrogen peroxide=9:3:3:1 volume ratio prepare and
At being sufficiently stirred in adding procedure, make heavy metal ion by Ore Leaching.
Step 2: the mixed liquor in step 1 acidolysis slot is put into ultrasonic tank, ultrasonic wavelength-division is carried out with the frequency of 15KHz
Solution, so that sludge and acid hydrolysis solution come into full contact with and react.
Step 3: the mixed liquor after ultrasound in step 2 is separated by solid-liquid separation, pickle liquor is obtained and has acid hydrolysis solution residual
Sludge.
Step 4: will there is the remaining sludge of acid hydrolysis solution to be flushed three times in step 3 with clear water, to slough remaining heavy metal,
Obtain innoxious sludge.
Step 5: the liquid rinsed after having acid hydrolysis solution to remain sludge in the pickle liquor and step 4 in step 3 is added
It is mixed in ferrite reaction tank, ferrous sulfate is added, the quality being added is 8 of all heavy metal quality in mixed liquor
Times, it is uniformly mixed, and heat liquid to 55 DEG C.Then, NaOH is slowly added into reaction tank, until when pH value is 8.5 in system,
It is passed through high-purity oxygen, is sufficiently generated after reaction and contains the ferrite crystal including ferro element and heavy metal ion；It will finally give birth to
At ferrite crystal separated with alkaline waste liquor after dry to get to ferrite, alkaline waste liquor is discharged into waste water treatment system processing
Qualified discharge afterwards.
Step 6: by the innoxious sludge isolated in step 4 and steel slag, common stone, flyash, quartz sand, water glass
Glass, kaolin, bamboo powder and pore creating material mix, wherein parts by weight (Kg) are as follows: and innoxious sludge is 40, common stone 20, steel slag 18,
Flyash 10, waterglass 15, quartz sand 10, kaolin 5, bamboo powder 3, pore creating material 1.Suitable water is added, be put into blender with
130 revs/min of speed stirs into pug, and control moisture content is 15%.
Step 7: by the pug mixed in step 6 be put into pressure be 30Mpa dry-pressing formed machine it is dry-pressing formed, pass through
The sponge urban construction water-permeable brick of different shape and size can be made in different molds.
Step 8: molding adobe obtained in step 7 is passed through natural drying or is put into 105 DEG C of freeze-day with constant temperature
It is dry in case, so that moisture content is 5%.
Step 9: the adobe after will be dry in step 8 is sent into kiln and is sintered, 1050 are warming up to 3.5 DEG C/min speed
DEG C, it is down to room temperature after continuing 3h, finally obtains that compression strength is high, water permeability is good, energy-saving and environment-friendly sponge urban construction is used
Water-permeable brick.
After tested, the compression strength of sponge urban construction water-permeable brick of the invention is 55MPa, coefficient of permeability 2.48 ×
102Cm/s, grinds anti-length no more than 35mm, 52.5,25 Frozen-thawed cycled compression strength loss of bending strength less than 18%,
His index meets " water-permeable brick " (CJ/T945~2005) standard.
Embodiment 2
For handling electroplate factory's heavy metal sewage sludge, implementation steps are further described.
Step 1: heavy metal sewage sludge of the 100Kg moisture content not less than 60% is weighed in acidolysis slot, according to heavy metal sewage sludge
Volume 40% be added acid hydrolysis solution, acid hydrolysis solution is with sulfuric acid: nitric acid: hydrofluoric acid: hydrogen peroxide=9:3:3:1 volume ratio prepare and
At being sufficiently stirred in adding procedure, make heavy metal ion by Ore Leaching.
Step 2: the mixed liquor in step 1 acidolysis slot is put into ultrasonic tank, ultrasonic wavelength-division is carried out with the frequency of 25KHz
Solution, so that sludge and acid hydrolysis solution come into full contact with and react.
Step 3: the mixed liquor after ultrasound in step 2 is separated by solid-liquid separation, pickle liquor is obtained and has acid hydrolysis solution residual
Sludge.
Step 4: will there is the remaining sludge clear water of acid hydrolysis solution to rinse in step 3 five times, to slough remaining heavy metal,
Obtain innoxious sludge.
Step 5: thering is the liquid after the remaining sludge of acid hydrolysis solution to add for rinsing in the pickle liquor and step 4 in step 3
Enter and mixed in ferrite reaction tank, ferrous sulfate is added, the quality being added is all heavy metal quality in mixed liquor
It 10 times, is uniformly mixed, and heat liquid to 60 DEG C.Then, KOH is slowly added into reaction tank, until when pH value is 9 in system,
It is passed through high-purity oxygen, is sufficiently generated after reaction and contains the ferrite crystal including ferro element and heavy metal ion；It will finally give birth to
At ferrite crystal separated with alkaline waste liquor after dry to get to ferrite, alkaline waste liquor is discharged into waste water treatment system processing
Qualified discharge afterwards.
Step 6: by the innoxious sludge isolated in step 4 and steel slag, flyash, quartz sand, waterglass and pore-creating
Agent mixes, wherein parts by weight (Kg) are as follows: innoxious sludge is 45, common stone 23, steel slag 15, flyash 8, waterglass 15, stone
Sand 10, kaolin 8, bamboo powder 3, pore creating material 1.Suitable water is added, is put into blender and is stirred into 130 revs/min of speed
Pug, control moisture content are 16%.
Step 7: by the pug mixed in step 6 be put into pressure be 30Mpa dry-pressing formed machine it is dry-pressing formed, pass through
The sponge urban construction water-permeable brick of different shape and size can be made in different molds.
Step 8: molding adobe obtained in step 7 is passed through natural drying or is put into 105 DEG C of freeze-day with constant temperature
It is dry in case, so that moisture content is 5%.
Step 9: the adobe after will be dry in step 8 is sent into kiln and is sintered, 1100 are warming up to 4 DEG C/min speed
DEG C, it is down to room temperature after continuing 3h, finally obtains that compression strength is high, water permeability is good, energy-saving and environment-friendly sponge urban construction is used
Water-permeable brick.
After tested, the compression strength of sponge urban construction water-permeable brick of the invention is 60.5MPa, coefficient of permeability 2.2 ×
102Cm/s, grinds anti-length no more than 32mm, 62.5,25 Frozen-thawed cycled compression strength loss of bending strength less than 16%,
His index meets " water-permeable brick " (CJ/T945~2005) standard.
Embodiment 3
For handling printed circuit board factory heavy metal sewage sludge, implementation steps are further described.
Step 1: heavy metal sewage sludge of the 100Kg moisture content not less than 60% is weighed in acidolysis slot, according to heavy metal sewage sludge
Volume 50% be added acid hydrolysis solution, acid hydrolysis solution is with sulfuric acid: nitric acid: hydrofluoric acid: hydrogen peroxide=9:3:3:1 volume ratio prepare and
At being sufficiently stirred in adding procedure, make heavy metal ion by Ore Leaching.
Step 2: the mixed liquor in step 1 acidolysis slot is put into ultrasonic tank, ultrasonic wavelength-division is carried out with the frequency of 30KHz
Solution, so that sludge and acid hydrolysis solution come into full contact with and react.
Step 3: the mixed liquor after ultrasound in step 2 is separated by solid-liquid separation, pickle liquor is obtained and has acid hydrolysis solution residual
Sludge.
Step 4: the clear water of the sediment in step 3 is rinsed five times, to slough remaining heavy metal, obtain innoxious
Sludge.
Step 5: ferrite reaction is added in the liquid after flushing sediment in the pickle liquor and step 4 in step 3
It is mixed in pond, ferrous sulfate is added, the quality being added is 12 times of all heavy metal quality in mixed liquor, and mixing is equal
It is even, and liquid is heated to 65 DEG C.Then, NaOH is slowly added into reaction tank, until being passed through high-purity when pH value is 9 in system
Oxygen sufficiently generates after reaction and contains the ferrite crystal including ferro element and heavy metal ion；Finally by the ferrite of generation
Crystal is dried to arrive ferrite after separating with alkaline waste liquor, and alkaline waste liquor is discharged into qualified discharge after waste water treatment system processing.
Step 6: by the innoxious sludge isolated in step 4 and steel slag, flyash, quartz sand, waterglass and pore-creating
Agent mixing, innoxious sludge are 45, common stone 23, steel slag 18, flyash 10, waterglass 15, quartz sand 12, kaolin 8, bamboo
Powder 4, pore creating material 3.Suitable water is added, is put into blender and pug is stirred into 130 revs/min of speed, control moisture content is
18%.
Suitable water is added, is put into blender and pug is stirred into 130 revs/min of speed, control moisture content is 18%.
Step 7: by the pug mixed in step 6 be put into pressure be 30Mpa dry-pressing formed machine it is dry-pressing formed, pass through
The sponge urban construction water-permeable brick of different shape and size can be made in different molds.
Step 8: molding adobe obtained in step 7 is passed through natural drying or is put into 105 DEG C of freeze-day with constant temperature
It is dry in case, so that moisture content is 5%.
Step 9: the adobe after will be dry in step 8 is sent into kiln and is sintered, 1150 are warming up to 4 DEG C/min speed
DEG C, it is down to room temperature after continuing 3h, finally obtains that compression strength is high, water permeability is good, energy-saving and environment-friendly sponge urban construction is used
Water-permeable brick.
After tested, the compression strength of sponge urban construction water-permeable brick of the invention is 62MPa, coefficient of permeability 2.8 ×
102Cm/s, grinds anti-length no more than 28mm, 56.0,25 Frozen-thawed cycled compression strength loss of bending strength less than 15%,
His index meets " water-permeable brick " (CJ/T945~2005) standard.
Embodiment 4
Embodiment 4 is similar with 1 step of embodiment, sulfuric acid, nitric acid, hydrofluoric acid and hydrogen peroxide 8:2 by volume in acid hydrolysis solution:
2:1 is prepared, and the volume that acid hydrolysis solution is added is the 30% of heavy metal sewage sludge volume；The frequency of oscillation of ultrasonic wave is 15KHz, when oscillation
Between be 1h；The number that clear water rinses is 3 times；The additive amount of ferrous sulfate is 8 times of heavy metal gross mass in liquid, heats liquid
For temperature to 55 DEG C, lye NaOH, the pH value that lye amount is added to liquid is 8.5；Innoxious sludge, common stone, steel slag, powder
Coal ash, waterglass, quartz sand, kaolin, bamboo powder and pore creating material weight part ratio are as follows: 40,20,15,8,12,10,5,3 and 1, mud
The moisture control of material is in 14wt%.Steel slag and quartz sand cross 10 meshes, and the partial size of flyash is 0.1mm, and pore creating material is pearl
Rock.The pressure of dry-pressing formed machine is 25Mpa.Drying box is thermostatic drying chamber, and temperature is 103 DEG C, the moisture content of adobe after drying
For 5wt%.1020 DEG C are warming up to the speed of 3.5 DEG C/min when sintering, is down to room temperature after being persistently sintered 2.5h.
After tested, meet " water-permeable brick " (CJ/T945~2005) standard.
Embodiment 5
Embodiment 5 is similar with 1 step of embodiment, sulfuric acid, nitric acid, hydrofluoric acid and hydrogen peroxide 9:3 by volume in acid hydrolysis solution:
3:1 is prepared, and the volume that acid hydrolysis solution is added is the 35% of heavy metal sewage sludge volume；The frequency of oscillation of ultrasonic wave is 20KHz, when oscillation
Between be 1.5h；The number that clear water rinses is 4 times；The additive amount of ferrous sulfate is 10 times of heavy metal gross mass in liquid, heating
For fluid temperature to 60 DEG C, lye KOH, the pH value that lye amount is added to liquid is 9；Innoxious sludge, common stone, steel slag,
Flyash, waterglass, quartz sand, kaolin, bamboo powder and pore creating material parts by weight are as follows: 43,22,16,9,13,11,7,4 and 2, mud
The moisture control of material is in 16wt%.Steel slag and quartz sand cross 10 meshes, and the partial size of flyash is 0.12mm, and pore creating material is diatom
Soil.The pressure of dry-pressing formed machine is 30Mpa.Drying box is thermostatic drying chamber, and temperature is 105 DEG C, the moisture content of adobe after drying
For 4wt%.1040 DEG C are warming up to the speed of 3.8 DEG C/min when sintering, is down to room temperature after being persistently sintered 3h.
After tested, meet " water-permeable brick " (CJ/T945~2005) standard.
Embodiment 6
Embodiment 6 is similar with 1 step of embodiment, sulfuric acid, nitric acid, hydrofluoric acid and hydrogen peroxide by volume 10 in acid hydrolysis solution:
4:4:1 is prepared, and the volume that acid hydrolysis solution is added is the 50% of heavy metal sewage sludge volume；The frequency of oscillation of ultrasonic wave is 30KHz, oscillation
Time is 2h；The number that clear water rinses is 5 times；The additive amount of ferrous sulfate is 12 times of heavy metal gross mass in liquid, heating
For fluid temperature to 65 DEG C, lye NaOH, the pH value that lye amount is added to liquid is 9；Innoxious sludge, common stone, steel slag,
Flyash, waterglass, quartz sand, kaolin, bamboo powder and pore creating material parts by weight are as follows: 45,23,18,10,15,12,8,4 and 3,
The moisture control of pug is in 18wt%.Steel slag and quartz sand cross 10 meshes, and the partial size of the flyash is 0.15mm, pore-creating
Agent is to boil stone.The pressure of dry-pressing formed machine is 35Mpa.Drying box is thermostatic drying chamber, and temperature is 108 DEG C, adobe after drying
Moisture content position 5wt%.1150 DEG C are warming up to the speed of 4.0 DEG C/min when sintering, is down to room temperature after being persistently sintered 3.5h.
After tested, meet " water-permeable brick " (CJ/T945~2005) standard.
Claims (10)
1. a kind of water-permeable brick prepared using innoxious sludge, which is characterized in that including following components and parts by weight content:
Innoxious sludge 40-45, common stone 20-23, steel slag 15-18, flyash 8-10, waterglass 12-15, quartz sand 10-
12, kaolin 5-8, bamboo powder 3-4 and pore creating material 1-3,
The innoxious sludge is prepared by following steps:
(1) acid hydrolysis solution stirring is added in heavy metal sewage sludge, reacts heavy metal ion with acid and is leached, pH is adjusted in system
When 2.2-3.2, acidolysis reaction terminates；
(2) mixed liquor of step (1) is subjected to ultrasonication, sludge and acid hydrolysis solution is made to come into full contact with and react；
(3) mixed liquor after ultrasound in step (2) is separated by solid-liquid separation, obtains acid hydrolysis solution and remains the sludge of acid hydrolysis solution；
(4) sludge of residual acid hydrolysis solution in step (3) is rinsed with clear water, sloughs remaining acid hydrolysis solution and heavy metal, obtains
Innoxious sludge；
(5) liquid generated after the acid hydrolysis solution and the middle sludge for rinsing residual acid hydrolysis solution of step (4) in step (3) is mixed
It closes, ferrous sulfate is added, be uniformly mixed and heat, add lye, and be passed through oxygen, sufficiently generated after reaction and contain ferro element
With the ferrite crystal of heavy metal ion, ferrite crystal is separated with alkaline waste liquor, is dried, and obtains ferrite, at alkaline waste liquor
Manage qualified discharge；
Acid hydrolysis solution described in step (1) be sulfuric acid, nitric acid, hydrofluoric acid and hydrogen peroxide mixture, sulfuric acid, nitric acid, hydrofluoric acid and
8-10:2-4:2-4:1 is prepared hydrogen peroxide by volume, and the volume that acid hydrolysis solution is added is the 30-50% of heavy metal sewage sludge volume, step
Suddenly the additive amount of ferrous sulfate described in (5) is 8-12 times of heavy metal gross mass in liquid, heating fluid temperature to 55-65
DEG C, the lye is NaOH or KOH, and the pH value that lye amount is added to liquid is 8.5-9.
2. a kind of water-permeable brick prepared using innoxious sludge according to claim 1, which is characterized in that the steel slag
10 meshes, partial size≤0.15mm of the flyash are crossed with quartz sand.
3. a kind of water-permeable brick prepared using innoxious sludge according to claim 1, which is characterized in that the pore-creating
Agent is perlite, diatomite, rice husk or boils stone.
4. the preparation method that one kind prepares water-permeable brick using innoxious sludge as described in claim 1, which is characterized in that specific
The following steps are included:
(1) acid hydrolysis solution stirring is added in heavy metal sewage sludge, reacts heavy metal ion with acid and is leached, pH is adjusted in system
When 2.2-3.2, acidolysis reaction terminates；
(2) mixed liquor of step (1) is subjected to ultrasonication, sludge and acid hydrolysis solution is made to come into full contact with and react；
(3) mixed liquor after ultrasound in step (2) is separated by solid-liquid separation, obtains acid hydrolysis solution and remains the sludge of acid hydrolysis solution；
(4) sludge of residual acid hydrolysis solution in step (3) is rinsed with clear water, sloughs remaining acid hydrolysis solution and heavy metal, obtains
Innoxious sludge；
(5) liquid generated after the acid hydrolysis solution and the middle sludge for rinsing residual acid hydrolysis solution of step (4) in step (3) is mixed
It closes, ferrous sulfate is added, be uniformly mixed and heat, add lye, and be passed through oxygen, sufficiently generated after reaction and contain ferro element
With the ferrite crystal of heavy metal ion, ferrite crystal is separated with alkaline waste liquor, is dried, and obtains ferrite, at alkaline waste liquor
Manage qualified discharge；
(6) the innoxious sludge for obtaining step (4) and common stone, steel slag, flyash, waterglass, quartz sand, kaolin,
Bamboo powder and pore creating material stir into pug after mixing by charge ratio, and control moisture content；
(7) pug of step (6) is put into dry-pressing formed machine is dry-pressing formed, the permeable brick adobe of different shape and size is made；
(8) permeable brick adobe obtained in step (7) is dry by spontaneously drying or being put into drying box；
(9) the permeable brick adobe of step (8) after dry is sintered to get water-permeable brick is arrived.
5. the preparation method according to claim 4 for preparing water-permeable brick using innoxious sludge, which is characterized in that step
(1) acid hydrolysis solution described in is the mixture of sulfuric acid, nitric acid, hydrofluoric acid and hydrogen peroxide, and sulfuric acid, nitric acid, hydrofluoric acid and hydrogen peroxide are pressed
Volume ratio 8-10:2-4:2-4:1 is prepared, and the volume that acid hydrolysis solution is added is the 30-50% of heavy metal sewage sludge volume.
6. the preparation method according to claim 4 for preparing water-permeable brick using innoxious sludge, which is characterized in that step
(2) frequency of oscillation of the ultrasonic wave described in is 15-30KHz, duration of oscillation 1-2h, the number that step (4) clear water rinses
It is 3-5 times.
7. the preparation method according to claim 4 for preparing water-permeable brick using innoxious sludge, which is characterized in that step
(5) additive amount of the ferrous sulfate described in is 8-12 times of heavy metal gross mass in liquid, heating fluid temperature to 55-65 DEG C,
The lye is NaOH or KOH, and the pH value that lye amount is added to liquid is 8.5-9.
8. the preparation method according to claim 4 for preparing water-permeable brick using innoxious sludge, which is characterized in that step
(6) for the moisture control of the pug in 14-18wt%, the pressure of dry-pressing formed machine described in step (7) is 25-35Mpa.
9. the preparation method according to claim 4 for preparing water-permeable brick using innoxious sludge, which is characterized in that step
(8) drying box described in is thermostatic drying chamber, and temperature is 103-108 DEG C, and the moisture content of adobe is not more than 6wt% after drying.
10. the preparation method according to claim 4 for preparing water-permeable brick using innoxious sludge, which is characterized in that step
(9) it is warming up to 1020-1150 DEG C with the speed of 3.5-4.0 DEG C/min when being sintered, is down to room temperature after being persistently sintered 2.5-3.5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663310.0A CN106278373B (en) | 2016-08-12 | 2016-08-12 | Utilize the water-permeable brick and preparation method thereof of heavy metal sewage sludge preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663310.0A CN106278373B (en) | 2016-08-12 | 2016-08-12 | Utilize the water-permeable brick and preparation method thereof of heavy metal sewage sludge preparation |
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