DE3037995A1 - Using gypsum from gas purificn. - by mixing with red mud, cement and calcium chloride, giving solid suitable for building material or dumping - Google Patents
Using gypsum from gas purificn. - by mixing with red mud, cement and calcium chloride, giving solid suitable for building material or dumpingInfo
- Publication number
- DE3037995A1 DE3037995A1 DE19803037995 DE3037995A DE3037995A1 DE 3037995 A1 DE3037995 A1 DE 3037995A1 DE 19803037995 DE19803037995 DE 19803037995 DE 3037995 A DE3037995 A DE 3037995A DE 3037995 A1 DE3037995 A1 DE 3037995A1
- Authority
- DE
- Germany
- Prior art keywords
- cement
- red mud
- building material
- calcium chloride
- mixing
- 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.)
- Granted
Links
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 title claims abstract description 5
- 239000001110 calcium chloride Substances 0.000 title claims abstract description 5
- 229910001628 calcium chloride Inorganic materials 0.000 title claims abstract description 5
- 239000004568 cement Substances 0.000 title claims abstract description 4
- 239000004566 building material Substances 0.000 title abstract description 4
- 239000007787 solid Substances 0.000 title abstract description 3
- 239000011499 joint compound Substances 0.000 title abstract 2
- 229910052602 gypsum Inorganic materials 0.000 title 1
- 239000010440 gypsum Substances 0.000 title 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 3
- 239000004571 lime Substances 0.000 claims abstract description 3
- 150000003839 salts Chemical class 0.000 claims abstract description 3
- 239000000945 filler Substances 0.000 claims abstract 2
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 2
- 238000004056 waste incineration Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 235000011148 calcium chloride Nutrition 0.000 abstract 1
- 239000004927 clay Substances 0.000 abstract 1
- 238000007596 consolidation process Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000289 melt material Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
- C04B22/124—Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Use of residues from wet or dry lime-based gas purificn., pref. after refuse incinerators (or power stations), involves mixing 20-40% wet or dry CaSO4.2H2O with 20-40% red mud and 5-10% cement and, if desired small amts. of fillers, e.g. clay etc., and with 5-10% CaCl2 as salt or prod. from the wash liquor of the gas purifier to effect consolidation. The prod. can be used as building material and/or dumped without causing pollution. A solid with a strength of up to over 200 kp/cm2 is obtd. without heating.
Description
Beschreibung und Erläuterung zur PatentanmeldungDescription and explanation of the patent application
~Verfahren zur Verfestigung von Rückständen aus der Gasreinigung vorzugsweise hinter Müllverbrennungsanlagen und Kraftwerksanlagen' Fs ist bekannt, die Abgase aus Müllverbrennungsanlagen bzw.~ Method for solidifying residues from gas cleaning preferably Behind waste incinerators and power plants' Fs is known to be the exhaust gases from waste incineration plants or
aus Kraftwerksanlagen naß- oder trockenchemisch zu reinigen.wet or dry chemical cleaning from power plants.
Das meistgebrauchte Verfahren ist gekennzeichnet durch eine Waschung mit Kalk oder in neuerer Zeit vielfach auch durch einen trockenchemischen Prozeß, in dem Kalkhydrat oder ähnliche Stoffe einer Kontaktstrecke und einem Filter zugeführt werden oder auch einer Sprühtrockenanlage, durch die das Gas zwangsgeführt wird.The most commonly used process is characterized by washing with lime or, more recently, often by a dry chemical process, in the hydrated lime or similar substances fed to a contact section and a filter or a spray drying system through which the gas is forced.
Bei diesem Prozeß entsteht ein Gemisch von CaS04, CaS03 und Salzen.This process creates a mixture of CaS04, CaS03 and salts.
Es wurden viele Versuche durchgeführt, um dieses Rückstandsprodukt deponiefreundlich oder sogar als Baustoff zu wandeln.Many attempts have been made to this residue product to be converted into landfill-friendly or even as a building material.
Die Weiterverarbeitung von Calciumsulfat-Dihydrat zu gebranntem Gips ist vom Energiebedarf abhängig und somit bei dem sehr hohen Wassergehalt wirtschaftlich vielfach nicht durchführbar.The processing of calcium sulphate dihydrate into plaster of paris depends on the energy requirement and is therefore economical with the very high water content often not feasible.
Es wird daher erfindungsgemäß vorgeschlagen, ohne Zuführung von Wärme, durch rein chemische Reaktion einen Feststoff aus Abfallstoffen, vorzugsweise hinter Rauchgasreinigungsanlagen, zu erzeugen, der als Baustoff und/oder deponiefreundlich angesehen werden kann.It is therefore proposed according to the invention, without supplying heat, a solid from waste materials, preferably behind, by a purely chemical reaction Flue gas cleaning systems, to be generated as a building material and / or landfill-friendly can be viewed.
Erfindungsgemäß werden 20 - 40 % Calciumsulfat-Dihydrat, welches naß aus der Rauchgasreinigung anfällt, mit 20 - 40 % Rot schlamm, der als Abfallprodukt bei der Aluminiumerzeugung anfällt, u#nd mit 5 - 10 % Zement oder Tone und je nach Bedarf mit geringen Mengen Kies und ähnlichen Schmelzstoffen unter weiterer erfindungsgemäßer Zuführung von ca. 10 % Calciumchlorid innig vermischt und geformt und anschließend unter natürlichen Verhältnissen ohne Wärmezuführung aus dem Energiebereich getrocknet, wodurch ein festes Material gefunden wurde, das bis Über 200 kp 2 Festigkeit pro cm2 aufweist.According to the invention, 20-40% calcium sulfate dihydrate, which is wet from flue gas cleaning, with 20 - 40% red sludge, which is a waste product in the production of aluminum, and with 5 - 10% cement or clays and depending on Requirement with small amounts of gravel and similar melt materials, among others according to the invention Supply of approx. 10% calcium chloride intimately mixed and shaped and then dried under natural conditions without heat input from the energy sector, whereby a solid material was found that has a strength of up to over 200 kp 2 per cm2.
Weiterhin wird erfindungsgemäß vorgeschlagen, das Calciumchlorid, das zur Verfestigung des Gemischmaterials dient, dem Waschwasser der Gaswäsche zu entnehmen.Furthermore, it is proposed according to the invention that the calcium chloride, which serves to solidify the mixture material to the scrubbing water of the gas scrubbing remove.
Patentanspruch Claim
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803037995 DE3037995A1 (en) | 1980-10-08 | 1980-10-08 | Using gypsum from gas purificn. - by mixing with red mud, cement and calcium chloride, giving solid suitable for building material or dumping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803037995 DE3037995A1 (en) | 1980-10-08 | 1980-10-08 | Using gypsum from gas purificn. - by mixing with red mud, cement and calcium chloride, giving solid suitable for building material or dumping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3037995A1 true DE3037995A1 (en) | 1982-08-19 |
| DE3037995C2 DE3037995C2 (en) | 1987-08-13 |
Family
ID=6113913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19803037995 Granted DE3037995A1 (en) | 1980-10-08 | 1980-10-08 | Using gypsum from gas purificn. - by mixing with red mud, cement and calcium chloride, giving solid suitable for building material or dumping |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3037995A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1000916A3 (en) * | 1987-10-07 | 1989-05-16 | Claywing Builders Ltd Trading | Treating solid. semi-solid or liq. toxic waste - by mixing with fly ash, calcium chloride, bentonite and opt. water to form a slurry and allowing to harden |
| EP0530548A1 (en) * | 1991-09-05 | 1993-03-10 | Gottfried Dr. Drews | Method of transferring contaminated incinerator residues, into a solid, safety disposable state |
| DE4430446A1 (en) * | 1994-08-27 | 1995-03-09 | Bilfinger & Berger Umweltverfa | Process for solidification of water-containing red mud |
| WO2017103553A1 (en) * | 2015-12-18 | 2017-06-22 | Red Media Technologies Lmited | Red mud pellets |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110002832A (en) * | 2019-04-18 | 2019-07-12 | 四川蓝鼎新材料有限公司 | Gypsum mortar production technology based on desulfurization gypsum powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2803764A1 (en) * | 1978-01-28 | 1979-08-16 | Saarbergwerke Ag | Utilising fly ash and calcium sulphate obtd. from flue gas - of coal burning furnace desulphurisation units, by heating aq. suspension to form anhydrite, and casting into bricks, etc. |
-
1980
- 1980-10-08 DE DE19803037995 patent/DE3037995A1/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2803764A1 (en) * | 1978-01-28 | 1979-08-16 | Saarbergwerke Ag | Utilising fly ash and calcium sulphate obtd. from flue gas - of coal burning furnace desulphurisation units, by heating aq. suspension to form anhydrite, and casting into bricks, etc. |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1000916A3 (en) * | 1987-10-07 | 1989-05-16 | Claywing Builders Ltd Trading | Treating solid. semi-solid or liq. toxic waste - by mixing with fly ash, calcium chloride, bentonite and opt. water to form a slurry and allowing to harden |
| EP0530548A1 (en) * | 1991-09-05 | 1993-03-10 | Gottfried Dr. Drews | Method of transferring contaminated incinerator residues, into a solid, safety disposable state |
| DE4129488A1 (en) * | 1991-09-05 | 1993-03-11 | Vaw Ver Aluminium Werke Ag | PROCESS FOR TRANSFERRING ELECTRICITY-BASED RESIDUES FROM COMBUSTION FACILITIES TO A SOLID, UNPARALLELY DEPONABLE FORM |
| DE4430446A1 (en) * | 1994-08-27 | 1995-03-09 | Bilfinger & Berger Umweltverfa | Process for solidification of water-containing red mud |
| DE19530801A1 (en) * | 1994-08-27 | 1996-02-29 | Bilfinger & Berger Umweltverfa | Solidifying red mud contg. aluminium and iron hydroxide(s),etc. |
| DE19530801C2 (en) * | 1994-08-27 | 1998-03-19 | Bilfinger & Berger Umweltverfa | Process for solidifying water-containing red mud |
| WO2017103553A1 (en) * | 2015-12-18 | 2017-06-22 | Red Media Technologies Lmited | Red mud pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3037995C2 (en) | 1987-08-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8101 | Request for examination as to novelty | ||
| 8105 | Search report available | ||
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |