DE4227988A1 - Utilisation of organic contaminated finely granulated residue - by addition of binder medium in piece form for use as additive in cement prodn. - Google Patents
Utilisation of organic contaminated finely granulated residue - by addition of binder medium in piece form for use as additive in cement prodn.Info
- Publication number
- DE4227988A1 DE4227988A1 DE19924227988 DE4227988A DE4227988A1 DE 4227988 A1 DE4227988 A1 DE 4227988A1 DE 19924227988 DE19924227988 DE 19924227988 DE 4227988 A DE4227988 A DE 4227988A DE 4227988 A1 DE4227988 A1 DE 4227988A1
- Authority
- DE
- Germany
- Prior art keywords
- cement
- prodn
- utilisation
- additive
- binder
- 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- Withdrawn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
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
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
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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
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Reststoffverwertung, insbesondere feinkörnig anfallender, mit brennbaren organischen Stoffen behaftete Reststoffe, z. B. Gießereialtsand.The invention relates to a process for recycling residues, especially fine-grained, with flammable organic substances contaminated residues, e.g. B. Foundry sand.
Es ist bekannt, daß sich Drehrohröfen der Zementindustrie zur thermischen Reststoffverwertung eignen, siehe z. B. "Aus der Tätigkeit der LIS 1991", Essen, 1992, Seiten 25 bis 31. Reststoffe, die je nach Wärm- und Verbrennungsbedingungen zu Emissionen von polycyclischen, aromatischen Kohlenwasserstoffen (PAH) oder anderen giftigen Stoffen führen, können danach nicht ohne weiteres thermisch aufbereitet und verwertet oder entsorgt werden. Reststoffe, die derartige Begleitstoffe enthalten, wie beispielsweise Gießereialtsand, waren daher bisher einer solchen thermischen Behandlung und Verwertung nicht zugänglich und wurden weit überwiegend durch Lagern auf Mülldeponien entsorgt. Es ist weiter bekannt, daß die Aufnahmefähigkeit derartiger Deponien begrenzt ist.It is known that rotary kilns are used in the cement industry thermal waste recycling are suitable, see e.g. B. "From activity der LIS 1991 ", Essen, 1992, pages 25 to 31. Residual substances, depending on Heating and combustion conditions for emissions from polycyclic, aromatic hydrocarbons (PAH) or other toxic substances can not be thermally processed and recycled or disposed of. Residuals, such accompanying substances contained, such as foundry sand, have therefore been one such thermal treatment and recovery not accessible and were largely disposed of by landfill. It is further known that the capacity of such landfills is limited is.
Das Problem vorliegender Erfindung ist also darin zu sehen, feinkörnige Reststoffe, die mit brennbaren organischen Stoffen behaftet sind, wie beispielsweise Gießereialtsand, umweltschonend zu entsorgen.The problem of the present invention is therefore to be seen in fine-grained Residues that are contaminated with flammable organic substances, such as For example, foundry sand to be disposed of in an environmentally friendly manner.
Gelöst wird das Problem mit den Merkmalen des Hauptanspruches 1. Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen.The problem is solved with the features of main claim 1. Further developments of the invention can be found in the subclaims.
Durch die Überführung des Altsandes in eine stuckige Form mit Gips als Bindemittel wird das Ausgasen der brennbaren Begleitstoffe beim Einfüllen zusammen mit dem Brenngut in die kalte Abgasseite des Drehrohrofens vermieden. Der in die stuckige Form überführte Altsand erwärmt sich langsam und aufgrund der Gipsbindung zerfällt das Granulat erst bei Temperaturen oberhalb 400°C, d. h. in einem Temperaturbereich, in dem seine brennbaren Gasbestandteile mit dem in diesem Bereich des Drehrohrofens ausreichend warmen Gas ausreagieren. Die Bildung giftiger Emissionen wird damit unterbunden.By converting the old sand into a stucco form with plaster as The degassing of the flammable accompanying substances becomes a binding agent Fill into the cold flue side of the flue together with the fuel Avoided rotary kiln. The old sand converted into the stucco form warms up slowly and due to the gypsum bond the granulate disintegrates only at temperatures above 400 ° C, d. H. in a temperature range in which its combustible gas constituents match that in this area of the React enough warm gas out of the rotary kiln. The formation of toxic This prevents emissions.
Außerdem ergibt sich der Vorteil, daß bei der Zementherstellung der Einsatz natürlicher Rohstoffe verringert wird, da Sand und Gips ohnehin für die Zementherstellung benötigt werden.There is also the advantage that the Use of natural raw materials is reduced because sand and plaster anyway are needed for cement production.
Das Mengenverhältnis der einzusetzenden stückigen Reststoffe zum normalen Einsatzgut für die Zementherstellung sowie die zweckmäßigste Stückgröße läßt sich durch einfache Versuche leicht bestimmen.The quantitative ratio of the lumpy residues to be used normal feed for cement production as well as the most practical Piece size can be easily determined by simple experiments.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924227988 DE4227988A1 (en) | 1992-08-21 | 1992-08-21 | Utilisation of organic contaminated finely granulated residue - by addition of binder medium in piece form for use as additive in cement prodn. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924227988 DE4227988A1 (en) | 1992-08-21 | 1992-08-21 | Utilisation of organic contaminated finely granulated residue - by addition of binder medium in piece form for use as additive in cement prodn. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4227988A1 true DE4227988A1 (en) | 1994-02-24 |
Family
ID=6466235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924227988 Withdrawn DE4227988A1 (en) | 1992-08-21 | 1992-08-21 | Utilisation of organic contaminated finely granulated residue - by addition of binder medium in piece form for use as additive in cement prodn. |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4227988A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6986501B2 (en) | 1998-02-06 | 2006-01-17 | Walter Sticht | Control element, especially a pneumatic valve |
-
1992
- 1992-08-21 DE DE19924227988 patent/DE4227988A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6986501B2 (en) | 1998-02-06 | 2006-01-17 | Walter Sticht | Control element, especially a pneumatic valve |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8139 | Disposal/non-payment of the annual fee |