DE3113714C2 - Process for the recycling of waste products from coal-fired power stations as roadside dam material and backfill material and material produced according to the process - Google Patents

Process for the recycling of waste products from coal-fired power stations as roadside dam material and backfill material and material produced according to the process

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Publication number
DE3113714C2
DE3113714C2 DE3113714A DE3113714A DE3113714C2 DE 3113714 C2 DE3113714 C2 DE 3113714C2 DE 3113714 A DE3113714 A DE 3113714A DE 3113714 A DE3113714 A DE 3113714A DE 3113714 C2 DE3113714 C2 DE 3113714C2
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DE
Germany
Prior art keywords
coal
fired power
calcium chloride
waste products
dam
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.)
Expired
Application number
DE3113714A
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German (de)
Other versions
DE3113714A1 (en
Inventor
Heribert Ing.(grad.) 4390 Gladbeck Dewert
Heinrich Ing.(grad.) 4600 Dortmund Gresch
Heinz Dipl.-Ing. Hölter
Heinrich Ing.(grad.) 4390 Gladbeck Igelbüscher
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19813109879 external-priority patent/DE3109879A1/en
Application filed by Individual filed Critical Individual
Priority to DE3113714A priority Critical patent/DE3113714C2/en
Priority to FR8204212A priority patent/FR2509200A1/en
Publication of DE3113714A1 publication Critical patent/DE3113714A1/en
Application granted granted Critical
Publication of DE3113714C2 publication Critical patent/DE3113714C2/en
Expired legal-status Critical Current

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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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/062—Purification products of smoke, fume or exhaust-gases
    • C04B18/064—Gypsum
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Civil Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Inorganic Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Gegenstand der Hauptanmeldung P 3109879.7 ist ein Verfahren zur Beseitigung von hinter Kohlekraftwerken anfallenden Abfallprodukten und deren Nutzung unter Verwendung von Abfallwärme aus dem Kraftwerk zur Herstellung von Dammbaustoffen od.dgl. für den untertägigen Bergbau. Die zu beseitigenden Abfallprodukte, wie Filterasche und Rauchgasentschwefelungsgips, werden mit dem nassen und/oder getrockneten Calciumchlorid aus der Rauchgaswäsche gemischt und unter weiterer Zuführung von weiteren Bindemitteln und Härtern, wie Zement, als Dammbau- und/oder Hinterfüllmaterial für den untertägigen Bergbau verwendet. Es wurde nun erfindungsgemäß gefunden, daß durch einen Zusatz von ca. 2-3% Calciumchlorid-Dihydrat (CaCl ↓2 2H ↓2O) zu der genannten Mischung sich ein besonderer Abdichtungsstoff mit einer hohen Bindegeschwindigkeit und einer hohen Festigkeit ergibt. Als besonders geeignet hat sich nachstehende Zusammensetzung erwiesen: 60-65% aus der Rauchgasentschwefelungsanlage, 15-20% Filterachse und/oder Schlacke aus dem Kohlekraftwerkskessel und Filterbereich, ca. 10-15% Anhydrit und/oder Zement, 2,5% Calciumchlorid-Dihydrat.The subject of the main application P 3109879.7 is a method for removing waste products from coal-fired power plants and their use using waste heat from the power plant for the production of dam building materials or the like. for underground mining. The waste products to be removed, such as filter ash and flue gas desulphurisation gypsum, are mixed with the wet and / or dried calcium chloride from the flue gas scrubber and, with further addition of further binders and hardeners, such as cement, used as dam construction and / or backfill material for underground mining. It has now been found according to the invention that adding approx. 2-3% calcium chloride dihydrate (CaCl ↓ 2 2H ↓ 2O) to the mixture mentioned results in a special sealing material with a high binding rate and high strength. The following composition has proven to be particularly suitable: 60-65% from the flue gas desulphurization system, 15-20% filter axis and / or slag from the coal-fired power plant boiler and filter area, approx. 10-15% anhydrite and / or cement, 2.5% calcium chloride Dihydrate.

Description

a) 60-65 Gew.-% Gips.a) 60-65% by weight gypsum.

b) 10—15 Gew.-% Anhydrit und/oder Zement.b) 10-15% by weight anhydrite and / or cement.

c) 15—20Gew.-% Kesselschlackc und/oder -asche ίο undc) 15-20% by weight of boiler slag and / or ash ίο and

d) 2£ Gew.-% Calciumchlorid-Dihydrat.d) 2% by weight calcium chloride dihydrate.

60-65 Gew.-o/o Gips,60-65 wt. O / o plaster,

10—15 Gew.-% Anhydrit und/oder Zement,10-15% by weight anhydrite and / or cement,

15—20Gew.-% Kesselschlacke und/oder -asche und15-20% by weight boiler slag and / or -ash and

2,5 Gew.-% Calciumchlorid-Dihydrat2.5% by weight calcium chloride dihydrate

Die Erfindung betrifft ein Verfahren zur Verwertung der Abfallprodukte von Kohlenkraftwerken, nämlich der über Filter abgeschiedenen Filterasche sowie des in Rauchgas-Entschwefelungsanlagen anfallenden CaI-ciumsulfates, das durch Abwärme aus dem Kohlekraftwerk zu Calciumsulfat-Halbhydrat calciniert wird, als Streckenbegleitdammaierial und Hinterfüllmaterial, vorzugsweise für den untertägigen Bergbau.The invention relates to a method for recycling the waste products from coal-fired power plants, namely the filter ash separated by filters as well as the calcium sulphate occurring in flue gas desulphurisation systems, which is calcined to calcium sulfate hemihydrate by waste heat from the coal-fired power station, as Route accompanying damaierial and backfill material, preferably for underground mining.

Die Erfindung erstreckt sich weiterhin auf eine ganz bestimmte Zusammensetzung des Streckenbegidtdammaterials und Hinterfüllmaterials.The invention also extends to a specific composition of the route dam material and backfill material.

Durch die DE-OS 29 06 230 ist ein Verfahren zur Beseitigung des Rückstandes der Abgaswäsche von Feuerungen, insbesondere von Steinkohlenkraftwerken, bekannt, bei dem der Rückstand einer Kalkstein- oder Kalkwäsche zu einem Gips enthaltenden Substrat aufgearbeitet wird, welches umkristallisiert und Untertage als Streckensicherung eingebracht wird, wobei das umkristallisierte Substrat trocken gefördert und unter Zugabe von Wasser versetzt wird. Das Umkristallisieren erfolgt zu Beta-Sulfat-Halbhydrat, wobei das umkristallisierte Substrat für sich oder als steife Mischung mit Zuschlagstoffen als Versatzmaterial verwendet wird. Dieses bekannte Verf?hren hat den Nachteil, daß das Beta-Sulfat-Halbhydrat nicht die für einen Saumversatz- und Hinterfüllstoff erforderlichen Endfestigkeiten von wenigstens 10 N/mm2 erreicht.From DE-OS 29 06 230 a method for removing the residue of the waste gas scrubbing from furnaces, in particular from coal-fired power stations, is known in which the residue from a limestone or lime scrubbing is worked up into a substrate containing gypsum, which recrystallizes and is introduced underground as a route safety device is, the recrystallized substrate is conveyed dry and mixed with the addition of water. The recrystallization takes place to beta-sulfate hemihydrate, whereby the recrystallized substrate is used by itself or as a stiff mixture with additives as backfill material. This known method has the disadvantage that the beta-sulfate hemihydrate does not achieve the final strengths of at least 10 N / mm 2 required for a filler and backfill material.

Durch die Zeitschrift »Das Stuckgewerbe«, 1969, Heft 12, Seite 533—543, besonders Seite 534, ist es bekannt, Gips als Abbinderegler Calciumchlorid zuzusetzen. From the magazine "Das Stuckgewerbe", 1969, issue 12, pages 533-543, especially page 534, it is known Add calcium chloride to gypsum as a setting regulator.

Von diesem Stand der Technik ausgehend liegt der Erfindung lie Aufgabe zugrunde, ein Verfahren sowie ein Streckenbegleitdammaterial und Hinterfüllmaterial der eingangs genannten Art zu schaffen, welches nur aus Abfallstoffen besteht und dennoch über Vergleichsweise hohe Festigkeitswerte verfügt.Proceeding from this prior art, the invention is based on a method and a track dam material and backfill material of the type mentioned above, which consists only of waste materials and yet has a comparative effect has high strength values.

Verfahrensgemäß wird dies dadurch erreicht, daß Zement und/oder Anhydrit und zusätzlich 2 bis 3 Gew.-% Das nach dem erfindungsgemäßen Verfahren hergestellte Streckenbegleitdammaterial und Hinierfüllinaicrial weist vergleichsweise gute Werte in bezug auf Haftfähigkeit, Klebekraft, Frühfestigkeit, Biegezugfestigkeit und Dichtigkeit (Porenfreiheit) auf.According to the method this is achieved in that cement and / or anhydrite and additionally 2 to 3% by weight that produced by the process according to the invention Dam material to accompany the route and fill-in material has comparatively good values in terms of adhesion, adhesive strength, early strength, flexural strength and tightness (freedom from pores).

Es ist zwar bekannt, daß ein hoher Anteil von Gips mit Zement gemischt keine hohen Druck- und Bicgcfc-It is known that a high proportion of plaster of paris mixed with cement no high pressure and bicgcfc-

stigkeiten erbringt, da durch den unterschiedlichen Wasserbedarf der beiden Komponenten die hergestellte Mischung rissig und spröde wird. Jedoch ergibt sich durch die erfindungsgemäße Zugabe von 2—3 Gcw.-% Calciumchlorid-Dihydrat überraschenderweise eine starke Verbesserung der vorerwähnten Eigenschaften. Durch die Verwendung von Calciumchlorid-Dihydrat anstelle von kristallwasserfreiem Calciumchlorid werden die hygroskopischen Eigenschaften des Calciumchlorid-Dihydrates stärker wirksam, so daß die Feuchtigkeit im Feststoffgemisch langer erhalten bleibt und regulierend auf den Wasserhaushalt des Gemisches einwirkt und damit die Abbindung zwischen Gips und Zement geregelt erfolgen kann.The two components have different water requirements, because the one produced Mixture becomes cracked and brittle. However, the addition according to the invention of 2-3% by weight Calcium chloride dihydrate surprisingly greatly improves the aforementioned properties. By using calcium chloride dihydrate instead of calcium chloride which is free of crystalline water the hygroscopic properties of calcium chloride dihydrate more effective, so that the moisture is retained longer in the solid mixture and has a regulating effect on the water balance of the mixture and so that the setting between plaster of paris and cement can take place in a controlled manner.

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zur Verwertung der Abfallprodukte von Kohlenkraftwerken, nämlich der über Filter abgeschiedenen Filterasche sowie des in Rauchgas-Entschwefelungsanlagen anfallenden Calciumsulfates, das durch Abwärme aus dem Kohlekraftwerk zu Calciumsulfat-Halbhydrat calciniert wird, als Strekkenbegleitdammaterial und Hinterfüllmaterial, vorzugsweise für den untertätigen Bergbau, dadurch gekennzeichnet, daß Zement und/oder Anhydrit und zusätzlich 2 bis 3 Gew.-% Calciumchlorid-Dihydrat zugemischt werden.1. Process for recycling the waste products from coal-fired power plants, namely those separated by filters Filter ash as well as the calcium sulphate occurring in flue gas desulphurisation systems, which is calcined to calcium sulphate hemihydrate using waste heat from the coal-fired power station, as a roadside dam material and backfill material, preferably for underground mining, thereby characterized in that cement and / or anhydrite and additionally 2 to 3 wt .-% calcium chloride dihydrate are mixed in. 2. Streckenbegleitdammaterial und Hinterfüllmaterial, vorzugsweise für den untertätigen Bergbau, hergestellt nach dem Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, daß dieses folgendes Mischungsverhältnis aufweist:2. Dam material and backfill material, preferably for underground mining, produced according to the method according to claim 1, characterized in that this following mixing ratio having: Calciumchlorid-D'ihydrat zugemischt werden.Calcium chloride dihydrate are added. Für das nach dem erfindungsgemäßen Verfahren hergestellte Streckenbegleitdammaterial und Hinterfüllmaterial erweist sich das nachstehende Mischungsvcrhältnis als besonders vorteilhaft:For the roadside dam material and backfill material produced by the method according to the invention the following mixing ratio proves to be particularly advantageous:
DE3113714A 1981-03-14 1981-04-04 Process for the recycling of waste products from coal-fired power stations as roadside dam material and backfill material and material produced according to the process Expired DE3113714C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE3113714A DE3113714C2 (en) 1981-03-14 1981-04-04 Process for the recycling of waste products from coal-fired power stations as roadside dam material and backfill material and material produced according to the process
FR8204212A FR2509200A1 (en) 1981-03-14 1982-03-12 Building material for making dams or walls in underground mines - contains large amt. of fly ash obtd. from electrostatic filters in coal burning power stations

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813109879 DE3109879A1 (en) 1981-03-14 1981-03-14 Process for disposing of waste products inevitably formed downstream of coal-fired power stations and their utilisation with use of waste heat from the power station for production of preferably dam building materials for underground mining
DE3113714A DE3113714C2 (en) 1981-03-14 1981-04-04 Process for the recycling of waste products from coal-fired power stations as roadside dam material and backfill material and material produced according to the process

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Publication Number Publication Date
DE3113714A1 DE3113714A1 (en) 1982-11-25
DE3113714C2 true DE3113714C2 (en) 1985-09-19

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232078A1 (en) 1982-08-28 1984-03-01 Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen USE OF THE RESIDUAL SOLIDS OF THE DRY FUME DESULFURATION AS A BUILDING MATERIAL
DE3249786C2 (en) * 1982-08-28 1990-02-08 Rheinisch-Westfaelisches Elektrizitaetswerk Ag, 4300 Essen, De Use of the residual solids from dry flue gas desulphurisation as building material for producing shaped objects

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504912A1 (en) * 1981-05-02 1982-11-05 Hoelter H MASSES TO BE DESIGNED TO CONSOLIDATE THE FRESHLY HOLLOW FIELD, PREFERABLY FOR MINING GALLERIES
DE3209267C2 (en) * 1982-03-13 1991-09-26 Gebr. Knauf Westdeutsche Gipswerke, 8715 Iphofen Mining mortar for route safety
DE3226702A1 (en) * 1982-03-13 1984-02-09 Heinz Dipl.-Ing. 4390 Gladbeck Hölter Process for the utilisation of coalmining dirt with feed of waste products from flue gas purification
DE3229520A1 (en) * 1982-07-16 1984-02-09 Heinz Dipl.-Ing. 4390 Gladbeck Hölter Process for using wastes from coal mining with addition of chemisorbents which serve for waste gas desulphurisation and are fed under control to the ceramisation process for binding further pollutants and at the same time for improving the overall process
DE3232079C2 (en) * 1982-08-28 1986-05-22 Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen Use of residual plaster and dry residue from a wet or dry working flue gas desulphurisation system
DE3322539A1 (en) * 1983-06-23 1985-01-17 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Process for non-polluting disposal of residual products from coal-fired power stations
DE3612931A1 (en) * 1986-04-17 1987-10-22 Hoelter Heinz Mining mortar from waste dirt of coal extraction
US4857077A (en) * 1986-12-22 1989-08-15 Shell Oil Company Process for removing flyslag from gas
DE3644678A1 (en) * 1986-12-30 1988-07-14 Hoelter Heinz Process for producing packing material from products of the SO2/NOx simultaneous flue gas scrubber
DE3743818C2 (en) * 1987-12-23 1995-02-23 Hoelter Heinz Process for the production of a building material resistant to water leaching and its use
DE3811325A1 (en) * 1988-04-02 1989-10-12 Hoelter Heinz Aggregate for mining packing
DE3827612A1 (en) * 1988-08-13 1990-02-15 Viktor Dr Ing Gobiet Building material for use in underground operation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1771406A1 (en) * 1968-05-20 1972-02-03 Inst Energetik Process for the utilization of combustion residues from steam generation plants, in particular for the production of building materials
DE1802249A1 (en) * 1968-10-10 1970-06-18 Knapsack Ag Quick setting plaster
NL7204643A (en) * 1972-04-07 1973-10-09
DE2400350A1 (en) * 1974-01-04 1975-07-17 Heinz Hoelter Converting power station wastes into usable materials - fly ash and calcium sulphate mixed to form construction materials
DE2803764C2 (en) * 1978-01-28 1983-02-10 Saarbergwerke AG, 6600 Saarbrücken Process for cleaning coal-fired flue gases
DE2906230A1 (en) * 1979-02-17 1980-08-28 Steag Ag Disposal of residue obtd. from waste gas washing plants - where residue is calcined to form beta calcium sulphate hemi:hydrate employed to reinforce tunnels in underground mines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232078A1 (en) 1982-08-28 1984-03-01 Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen USE OF THE RESIDUAL SOLIDS OF THE DRY FUME DESULFURATION AS A BUILDING MATERIAL
DE3249786C2 (en) * 1982-08-28 1990-02-08 Rheinisch-Westfaelisches Elektrizitaetswerk Ag, 4300 Essen, De Use of the residual solids from dry flue gas desulphurisation as building material for producing shaped objects

Also Published As

Publication number Publication date
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