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 dumping

Info

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
Application number
DE19803037995
Other languages
German (de)
Other versions
DE3037995C2 (en
Inventor
Heribert Ing.(grad.) 4390 Gladbeck Dewert
Heinz Ing.(Grad.) 4600 Dortmund Gresch
Heinz Ing.(grad.) 4390 Gladbeck Hölter
Heinrich Ing.(grad.) Igelbüscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19803037995 priority Critical patent/DE3037995A1/en
Publication of DE3037995A1 publication Critical patent/DE3037995A1/en
Application granted granted Critical
Publication of DE3037995C2 publication Critical patent/DE3037995C2/de
Granted legal-status Critical Current

Links

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, 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)

Patentanspruch Anspruch 1 Verfahren zur Verwendung von Rückstandsprodukten aus der Gasreinigung vorzugsweise hinter Müllverbrennungsanlagen, wobei die Gasreinigung naß- oder trockenchemisch auf Kalkbasis durchgeführt wird, dadurch gekennzeichnet, daß das Calciumsulfat-Dihydrat, das naß oder trocken anfällt, mit einem Anteil von 20 - 40 % mit dem weiteren Abfallstoff Rotschlamm in einem Gemenge von ebenfalls 20 - 40 % gemischt wird unter weiterer Zumischung von 5 - 10 % Zement und wunschgerecht begleitenden kleineren Anteilen von Füllstoffen, wie Tone usw., und zur Verfestigung dienendem Calciumchlorid als Salz oder auch als Produkt aus dem Waschwasser der Gasreinigungsanlage, vorzugsweise in einer Zumischung von 5 - 10 %.Claim Claim 1 method for using residue products from gas cleaning preferably behind waste incineration plants, with gas cleaning is carried out wet or dry chemically based on lime, characterized in that that the calcium sulfate dihydrate, which is obtained wet or dry, with a proportion of 20 - 40% with the other waste material red mud in a mixture of as well 20 - 40% is mixed with further admixture of 5 - 10% cement and as desired accompanying smaller proportions of fillers, such as clays, etc., and for solidification serving calcium chloride as a salt or as a product from the washing water of the Gas cleaning system, preferably in an admixture of 5 - 10%.
DE19803037995 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 Granted DE3037995A1 (en)

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)

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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

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Country Link
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Cited By (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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.

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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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