EP2052091A2 - Aus schlacken gewonnener zuschlag- und füllstoff - Google Patents
Aus schlacken gewonnener zuschlag- und füllstoffInfo
- Publication number
- EP2052091A2 EP2052091A2 EP07802576A EP07802576A EP2052091A2 EP 2052091 A2 EP2052091 A2 EP 2052091A2 EP 07802576 A EP07802576 A EP 07802576A EP 07802576 A EP07802576 A EP 07802576A EP 2052091 A2 EP2052091 A2 EP 2052091A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- iron
- sulfate
- recyclate
- slags
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000002893 slag Substances 0.000 title claims abstract description 81
- 239000000945 filler Substances 0.000 title claims abstract description 9
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000000654 additive Substances 0.000 claims abstract description 20
- 150000004767 nitrides Chemical class 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical class S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 229910000358 iron sulfate Inorganic materials 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 16
- 239000004568 cement Substances 0.000 claims description 15
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 14
- 230000000996 additive effect Effects 0.000 claims description 12
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 12
- 150000002739 metals Chemical class 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 5
- 239000003337 fertilizer Substances 0.000 claims description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000005272 metallurgy Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims description 4
- 239000012065 filter cake Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 239000010426 asphalt Substances 0.000 claims description 3
- 238000009435 building construction Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 3
- XBDUTCVQJHJTQZ-UHFFFAOYSA-L iron(2+) sulfate monohydrate Chemical compound O.[Fe+2].[O-]S([O-])(=O)=O XBDUTCVQJHJTQZ-UHFFFAOYSA-L 0.000 claims description 3
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000005569 Iron sulphate Substances 0.000 abstract description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000012615 aggregate Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000004408 titanium dioxide Substances 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 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
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 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
- -1 aluminum nitride Chemical class 0.000 description 1
- 239000001166 ammonium sulphate Substances 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 210000004087 cornea Anatomy 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910003439 heavy metal oxide Inorganic materials 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- UQKCYIJPXBSQGJ-UHFFFAOYSA-L iron(2+);sulfate;tetrahydrate Chemical compound O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O UQKCYIJPXBSQGJ-UHFFFAOYSA-L 0.000 description 1
- 230000007794 irritation Effects 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
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/0038—Obtaining aluminium by other processes
- C22B21/0069—Obtaining aluminium by other processes from scrap, skimmings or any secondary source aluminium, e.g. recovery of alloy constituents
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/04—Calcareous fertilisers from blast-furnace slag or other slags containing lime or calcium silicates
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/1075—Chromium-free or very low chromium-content materials
- C04B2111/1081—Chromium VI, e.g. for avoiding chromium eczema
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Definitions
- the invention relates to a slag obtained aggregate and / or filler, a process for its preparation and its use.
- non-metallic substances are formed from the raw materials used. These non-metallic substances are classified in the art in metal slag and ironworks slag.
- the metallurgical slags are slags produced as waste in the extraction of metals such as aluminum, chromium, copper, lead, etc. They are therefore also referred to as aluminum, chromium, copper and lead coatings.
- the ironworks slags are blast furnace, steelworks and secondary metallurgical slags.
- the steelworks slags are also distinguished according to the manufacturing process in which they are incurred: For example, LD slags (LDS) in the production of steel according to the Linz-Donawitz process, electric furnace slags in the production of steel by the electric furnace process and SM slags in the production of steel according to the Siemens Martin process as waste.
- LDS LD slags
- electric furnace slags in the production of steel by the electric furnace process
- SM slags in the production of steel according to the Siemens Martin process as waste.
- the ironworks slags contain SiO 2 Al 2 O 3 , CaO and MgO as main constituents. In addition, they also contain iron oxide, free iron and metal and heavy metal oxides (see Table 1). The steelworks slags almost always contain free oxides, especially free lime (CaO). MgO-rich slags also contain free MgO (Table 2).
- the free lime content in the steel slag may be up to 10% by weight or more. With MgO, the free fraction is 8 wt% or more. In addition, these slags are very alkaline, which considerably limits the usability.
- the slags contain, due to the manufacturing process and the raw materials used, heavy metals, which pose a potential risk during recovery.
- some slags contain chromium, which can trigger allergic reactions in the skin.
- Water-soluble Cr (VI) compounds chromate
- Irritations and burns develop on the skin.
- Inhalation of Cr (VI) compounds causes respiratory damage. Therefore, it is necessary for the use of slags to comply with the requirements of the solubility of heavy metals.
- Some industrial slags contain chromium as an accompanying material and have a significant chromate solubility in water.
- FR-A-2 546 530 discloses the treatment of steel slags for utilization in cement.
- the liquid slag (melt phase) is added with at least one compound capable of forming alumina. It is performed the necessary amount of heat to dissolve the compound in the slag, and the slag mixed.
- the thus treated slag should then be used as a hydraulic binder, in particular for cement production.
- the still liquid slag is treated with oxygen and sand.
- the product shows no volume expansion and can therefore be used in road construction.
- WO-A-01 90 019 discloses a process for the treatment of steel slags, in which gaseous oxygen is blown into the liquid slag and the slag is then mixed with an aluminum or lime and optionally silicon oxide and / or iron source. After cooling and further working up, a hydraulic binder is obtained which can completely replace Portland cement.
- a disadvantage of the method described above is that they are technically very complicated and uneconomical.
- the treatment takes place at temperatures of up to 1500 0 C, which consumes a lot of energy.
- significant amounts of different synthetic or natural resources must be used.
- the so-called aluminum salt slag is obtained as metal slag.
- this slag still contains considerable amounts of aluminum nitride (AIN).
- AIN aluminum nitride
- the proportion of aluminum nitride can be up to 30 wt .-% or more, depending on the process control and method. Due to the AIN content, recovery of the aluminum salt slags is not possible because AIN reacts with undesired ammonia gas on contact with air or water.
- An object of the present invention is to provide recyclates, which can be produced by a cost-effective, energy-saving, technically easy to carry out treatment process from the obtained in the extraction of metals inevitably slags.
- Recyclates in the context of the invention are aggregates and fillers which are obtained in the production of metals and which contain the components known from metallurgical slags and ironworks slags, but up to less than 3 wt .-%, preferably less than 1, 5 wt .-%, in particular less than 1 wt .-% free CaO or free MgO or, in the case of aluminum salt slags, less than 1, 5 wt .-%, in particular less than 1 wt .-% nitrides, such as aluminum nitride having.
- the present invention relates to recyclates which can be produced by a cost-effective, energy-saving, technically easy to carry out treatment process from the obtained in the extraction of metals inevitably slags.
- the present invention relates to recyclates obtained in the production of metals and containing the known from metal slags and ironworks slag ingredients, but up to less than 3 wt .-%, preferably less than 1, 5 wt .-%, in particular less than 1 wt .-% free CaO or free MgO included.
- the present invention furthermore relates to recyclates which are obtained in the production of metals and which contain the constituents known from aluminum salt slags, but less than up to 3% by weight, preferably less than 1.5% by weight, in particular less than 1 Wt .-% nitrides, such as aluminum nitride and having a chromate solubility of less than 2 mg / kg.
- a recycled material is surprisingly obtained by reacting the slags obtained in the production of metals, for example metal slags and / or iron slags, with iron sulfate-containing additives.
- a recyclate is obtained according to the invention in which the free CaO and / or the free MgO are at values of less than 3% by weight, preferably less than 1, 5 wt .-%, in particular less than 1 wt .-% or, in the case of aluminum salt slags, wherein the nitride, for example aluminum nitride, to less than 1, 5 wt .-%, in particular to less than 1 wt .-% nitride , such as aluminum nitride, is reduced.
- iron (II) sulfate can be used as a chromate reducer of the chromate (VI) present in cement. Iron (II) sulphate reduces soluble chromium (VI) to insoluble chromium (III).
- Moist ferrous sulphate precipitates as so-called green salt in the production of titanium dioxide in greater quantity than waste.
- This salt consists of a mixture of FeSO 4 * 7H 2 O (iron (II) sulfate heptahydrate), and FeSO 4 '4H 2 O (iron (II) sulfate tetrahydrate).
- iron (II) sulphate or iron (III) sulphate as iron sulphate-containing additive, either individually or mixed with one another, as a solution, as a moist filter cake or in powder form.
- iron sulfates according to the invention may also contain other metal sulfates.
- iron sulfate-containing green salt is used as the iron sulfate-containing additive for the reaction with slags.
- metal sulfate-containing sulfuric acids for example dilute acid, obtained, for example, in titanium dioxide production or in pickling plants, are used as iron sulfate-containing additives.
- iron (II) and / or iron (II) sulfate-containing second-hand sulfuric acids individually or mixed with one another.
- Ferrous (II) - or iron (III) containing second-hand sulfuric acids accumulate in various chemical processes. For example, in the production of titanium dioxide by the sulphate process, the so-called dilute acid with about 23% sulfuric acid. In addition to iron (II) sulphate, this dilute acid also contains other metal sulphates. It is also possible, according to the invention, to use other iron (II) and / or iron (III) sulphate containing second-hand sulfuric acids.
- filter salt used for the reaction with slags is used as the iron sulfate-containing additive.
- Filter salt accumulates as waste in the production of titanium dioxide.
- iron sulfate-containing salt mixtures are precipitated by the concentration of dilute acid.
- the filter salt according to the invention may contain more or less sulfuric acid.
- the filter salt can also be used after neutralization of the sulfuric acid with alkali / alkaline earth salts, for example with CaO, Ca (OH) 2 or CaCO 3 .
- filter salt according to the invention as an iron sulphate-containing additive is that the basic compounds, for example free CaO and / or MgO in the slag react with the sulfuric acid adhering in the filter salt to form Ca sulfate and / or Mg sulphate and an inert recyclate arises.
- the free CaO / MgO content can be reduced to values below 1% by weight. Consequently the adverse properties in the use of the known aggregates and fillers such as increase in volume, cracking, complete decay, reduced.
- a recycled material obtained in this way can also be partially or completely neutralized according to the invention.
- the pH can be adjusted selectively between 2 and 13, preferably between 4 and 10, more preferably between 5 and 9, so that the recycled material according to the invention can be used excellently in a wide range of applications.
- inventive reaction of the aluminum salt slag with the inventively employable iron sulfate-containing additives ensures that undesirable released ammonia gas, which is formed by the reaction of aluminum nitride on contact with air and water, immediately reacted with iron sulfate and in the form of ammonium sulfate or a mixture of Me Ammonium sulphate is bound.
- filter salt dilute acid from titanium dioxide production, iron (II) - and / or iron (III) sulphate-containing used sulfuric acids, individually or mixed with one another, are used according to the invention as the iron sulfate-containing additive for the reaction with aluminum salt slags.
- the implementation of steelworks slags with filter salt, used as filter cake, can be done in a fast-running mixer. In this case, temperatures up to 120 ° C may arise. After cooling, a free-flowing recyclate is obtained according to the invention which can be used directly. If necessary, the recyclate can be dried and granulated or ground.
- iron sulfate-containing additives such as iron (II) sulfate and / or iron (III) sulfate, iron (II) - and / or iron (III) -containing
- Used sulfuric acids, metal sulfate-containing iron sulfates and / or filter salt is according to the invention between 0.1 and 95 wt .-%, preferably between 0.3 and 75% by weight, particularly preferably between 1 to 60 wt .-%, most preferably between 2 to 40% by weight.
- the grain size of the slags used is between 0.01 and 64 mm, preferably between 0.3 and 50 mm, more preferably between 0.5 and 32 mm, most preferably smaller than 10 mm.
- Sieve fractions having a grain size between the abovementioned limits can likewise be used according to the invention. In this way, a recyclate with an analogous grain size is obtained.
- the grain size of the recyclate according to the invention is between 0.01 and 64 mm, preferably between 0.1 and 50 mm, more preferably between 0.3 and 32 mm, very particularly preferably between 0.2 and 10 mm, in particular smaller than 2 mm.
- the present invention makes it possible for the first time to combine worthless waste and to provide recyclates therefrom which can be used in a variety of ways, for example in construction, for landscaping or road construction, for use in metallurgy or as fertilizer. Recyclates can be provided in accordance with the invention in this economically simple procedure, whereby raw materials are saved and thus the natural resources are spared.
- recyclates can be used as an additive to concrete, cement, asphalt, refractory materials, as sound insulation in building construction, as a raw material for the construction industry in particular Recycling in the manufacturing process, for less water-permeable coatings such as landfill covers, as a filler for filling mountain shafts and underground cavities, for sealing and strengthening of land, for landscaping or road construction, for use in metallurgy, such as slag, fertilizer or Aggregate (raw material) for cement production, used as a chromate reducer, in particular for use in preparations made of cement.
- a hydraulic binder containing cement as the main component is formed.
- This hydraulic binder is a sought-after raw material in the construction industry.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006037622 | 2006-08-10 | ||
PCT/EP2007/058330 WO2008017724A2 (de) | 2006-08-10 | 2007-08-10 | Aus schlacken gewonnener zuschlag- und füllstoff |
Publications (1)
Publication Number | Publication Date |
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EP2052091A2 true EP2052091A2 (de) | 2009-04-29 |
Family
ID=39018180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07802576A Withdrawn EP2052091A2 (de) | 2006-08-10 | 2007-08-10 | Aus schlacken gewonnener zuschlag- und füllstoff |
Country Status (3)
Country | Link |
---|---|
US (1) | US8540816B2 (de) |
EP (1) | EP2052091A2 (de) |
WO (1) | WO2008017724A2 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110135919A1 (en) * | 2009-12-09 | 2011-06-09 | The National Titanium Dioxide Co. Ltd. (Cristal) | Chloride ingress-resistant concrete |
KR101735414B1 (ko) * | 2013-01-07 | 2017-05-29 | 훈츠만 피앤에이 저머니 게엠베하 | 티타늄-함유 응집체, 그 제조 방법 및 그 용도 |
EP3222597A1 (de) * | 2016-03-21 | 2017-09-27 | Oliver Ballon | Sekundäre aluminiumoxidzusammensetzung mit verringerter ammoniakemission |
CN108264224A (zh) * | 2017-12-30 | 2018-07-10 | 王虎 | 一种在转炉炼钢过程中将钢渣熔炼成矿物棉料的冶炼工艺 |
BE1027914B1 (fr) | 2019-12-24 | 2021-07-26 | Orbix Productions | Procede de production d'un agregat alcalin |
ES2926356B2 (es) * | 2021-04-14 | 2023-02-27 | Aditivos Del Cemento S L | MEZCLA REDUCTORA DE Cr(VI) CONTENIDO EN CEMENTO A Cr(III) |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2546530B1 (fr) | 1981-08-07 | 1985-08-02 | Siderurgie Fse Inst Rech | Traitement de laitiers d'acierie en vue de leur utilisation en cimenterie |
JPS60202782A (ja) | 1984-03-23 | 1985-10-14 | Sumitomo Metal Ind Ltd | 転炉スラグの処理方法 |
FI79086B (fi) * | 1984-12-21 | 1989-07-31 | Outokumpu Oy | Foerfarande foer utnyttjande av slagg med hoeg jaernoxidhalt fraon metallframstaellning. |
ZA883753B (en) | 1987-06-18 | 1989-03-29 | Bethlehem Steel Corp | Process for chemical stabilization of heavy metal bearing dusts and sludge,such as eaf dust |
NL9101771A (nl) | 1991-10-23 | 1993-05-17 | Pelt & Hooykaas | Poreuze gegranuleerde staalslaksamenstelling alsmede toepassing van een dergelijke staalslaksamenstelling als vulstof in bouwmaterialen, wegenbouwmaterialen en ophoogmaterialen. |
DE4442559C2 (de) | 1993-12-09 | 1998-07-09 | Eska Implants Gmbh & Co | Gelenkpfanne für ein künstliches Hüftgelenk |
US5593493A (en) * | 1995-06-26 | 1997-01-14 | Krofchak; David | Method of making concrete from base metal smelter slag |
US6238633B1 (en) | 1997-06-30 | 2001-05-29 | Aluminum Waste Technology, Inc. | Process for preparing calcium aluminate from aluminum dross |
JP4078788B2 (ja) | 2000-01-13 | 2008-04-23 | 英昭 水渡 | フッ素を含む産業廃棄物の安定化処理技術 |
FR2809390B1 (fr) | 2000-05-24 | 2003-03-07 | Lafarge Sa | Procede de traitement oxydant des laitiers d'acierie et scories ld obtenues |
US6402833B1 (en) * | 2000-07-13 | 2002-06-11 | Lafarge Canada Inc. | Binder for mine tailings |
DE10300170B9 (de) * | 2003-01-08 | 2005-04-21 | Aluminium-Salzschlacke Aufbereitungs Gmbh | Verfahren zur Herstellung von hochtonerdehaltigem Rohstoff |
WO2004108624A1 (ja) | 2003-06-09 | 2004-12-16 | Nippon Steel Corporation | 製鋼スラグの安定化処理方法と安定化製鋼スラグおよび該スラグを用いる水域環境保全材料と水域環境保全方法 |
KR100590994B1 (ko) | 2004-09-08 | 2006-06-19 | 재단법인 포항산업과학연구원 | 제강슬래그의 에이징 방법 |
EP1741682A1 (de) * | 2005-07-08 | 2007-01-10 | Alexander Kehrmann | Zementklinker, Zement und Verfahren zur Herstellung von Zement |
CA2577564C (en) * | 2006-02-15 | 2011-07-12 | Lafarge Canada Inc. | Binder for mine tailings, alluvial sand and rock fill, or combinations thereof |
ES2369619T3 (es) * | 2008-03-20 | 2011-12-02 | Befesa Salzschlacke Gmbh | Materia prima con alto contenido en arcilla de aluminio y método para su fabricación. |
-
2007
- 2007-08-10 US US12/376,206 patent/US8540816B2/en not_active Expired - Fee Related
- 2007-08-10 WO PCT/EP2007/058330 patent/WO2008017724A2/de active Application Filing
- 2007-08-10 EP EP07802576A patent/EP2052091A2/de not_active Withdrawn
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
WO2008017724A2 (de) | 2008-02-14 |
US20090260542A1 (en) | 2009-10-22 |
WO2008017724A3 (de) | 2008-04-17 |
US8540816B2 (en) | 2013-09-24 |
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