DE4103311C2 - - Google Patents

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Publication number
DE4103311C2
DE4103311C2 DE19914103311 DE4103311A DE4103311C2 DE 4103311 C2 DE4103311 C2 DE 4103311C2 DE 19914103311 DE19914103311 DE 19914103311 DE 4103311 A DE4103311 A DE 4103311A DE 4103311 C2 DE4103311 C2 DE 4103311C2
Authority
DE
Germany
Prior art keywords
underground
iron sulfate
lime
neutralized
neutralization
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 - Fee Related
Application number
DE19914103311
Other languages
German (de)
Other versions
DE4103311A1 (en
Inventor
Heinz Prof. Dr.Sc. Dr.-Ing. 4390 Gladbeck De Hoelter
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 DE19914103311 priority Critical patent/DE4103311A1/en
Publication of DE4103311A1 publication Critical patent/DE4103311A1/en
Application granted granted Critical
Publication of DE4103311C2 publication Critical patent/DE4103311C2/de
Granted legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/30Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
    • A62D3/36Detoxification by using acid or alkaline reagents
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/04Waste materials; Refuse
    • C04B18/0481Other specific industrial waste materials not provided for elsewhere in C04B18/00
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/40Inorganic substances
    • A62D2101/47Inorganic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Civil Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Versatzmaterials für den untertägigen Bergbau aus Eisensulfatrückständen, wobei die insbesondere aus der Titan­ oxidgewinnung stammenden Eisensulfatsalze mit hohem Anteil freier Schwefelsäure durch Zugabe von Kalk oder kalkhaltiger Stoffe neutralisiert und dann insbesondere nach Zugabe von Bindemitteln wie Zement, Gips, Kalk unter Tage als Baustoff eingesetzt werden.The invention relates to a method for manufacturing of a backfill material for underground mining Iron sulfate residues, the particular ones being made of titanium iron sulphate salts with a high proportion free sulfuric acid by adding lime or calcareous Neutralizes substances and then especially after adding Binders such as cement, plaster, lime underground as a building material be used.

Bei diesem bekannten Verfahren (DE-OS 36 44 678) ist als nachteilig erkannt worden, daß die so erzeugten Produkte bzw. Baustoffe in trockner Form anfallen, die dann unter Tage wiederum durch Zugabe von Wasser erst einmal vorbereitet werden müssen, um dann zusammen mit dem Bindemittel als Baustoff eingesetzt zu werden. Dabei ist dieses bekannte Material, d. h. der Baustoff, vor allem dadurch gekennzeich­ net, daß die so hergestellten Massen sehr schnell abbinden, so daß sie sich insbesondere für das Verpumpen und Zwischen­ lagern zwischen den grobstückigen Bergen im "Alten Mann" nicht eignen. Dieses trockne Material entsteht dadurch, daß Abfallsalze, Eisen-II-Sulfat oder Eisensulfatmonohydrat mit 20 bis 35% freier Schwefelsäure aus der Titanoxidgewin­ nung durch Zugabe von Kalk oder geeigneten kalkhaltigen Stoffen neutralisiert wird. Diese Neutralisationsreaktion ist exotherm und verläuft etwa oberhalb 70°C, wobei das mit den Stoffen eingebrachte Wasser und das Kristallwasser verdampfen, so daß das beschriebene Trockenprodukt entsteht. In this known method (DE-OS 36 44 678) recognized as disadvantageous that the products so produced or building materials in dry form, which are then under Days prepared by adding water must then be used together with the binder as Building material to be used. This is well known Material, d. H. the building material, especially characterized by it net that the masses produced in this way set very quickly, making them especially for pumping and intermediate camp between the large mountains in the "Old Man" not suitable. This dry material is created that waste salts, iron (II) sulfate or iron sulfate monohydrate with 20 to 35% free sulfuric acid from the titanium oxide by adding lime or suitable lime-based Substances is neutralized. This neutralization reaction is exothermic and runs above 70 ° C water brought in with the substances and the crystal water evaporate so that the described dry product is formed.  

Aus der DE-OS 39 37 312 ist ein Verfahren bekannt, bei dem ebenfalls Eisen-II-Sulfate mit 20 bis 35%iger freier Schwefelsäure verarbeitet werden. Dieses Material wird nach dem bekannten Verfahren zusammen mit den Rückständen aus der Zinkgewinnung mit E-Filter-Asche und Eindampfsalzen aus der Müllverbrennung gemischt, so daß eine exotherme Reaktion entsteht. Auch hierdurch kann man einen Baustoff erhalten, der wasserauslaugungsfest ist und der dann offenbar auch unter Tage verarbeitet werden kann. Es handelt sich aber um einen Baustoff, der in trockner Form nach Untertage gebracht wird, um dort mit Wasser vermischt und dann weiterverarbeitet zu werden. Gemäß der DE-OS 40 18 568 ist ergänzend vorgesehen, daß das Gemisch auf 120 bis 180°C erhitzt und durch Wasserverdampfung gezielt getrocknet wird, um dann leichter Zement und Gips untermischen zu können. Die DE-OS 37 43 818 schließlich geht den umgekehrten Weg, indem Abfallkalk u.ä. Materialien durch Zusatz von Wasser, Eisen-II-Sulfat und Dünnsäure zu einem Gemisch verarbeitet werden, das dann bei 200 bis 800°C thermisch behandelt wird, um die Mischung dann später als Baustoff unter Tage oder im Straßenbau einsetzen zu können. Bei all diesen be­ kannten Verfahren ist von Nachteil, daß sie nur als trockenes Material unter Tage verarbeitet werden können. Sie erfordern somit aufwendige Transportwege. Außerdem ist ein Einbinden der gröberen Berge mit dem bekannten Material nicht möglich.A method is known from DE-OS 39 37 312 in which also iron II sulfates with 20 to 35% free Sulfuric acid are processed. This material is after the known method together with the residues zinc extraction with e-filter ash and evaporation salts mixed from waste incineration, making an exothermic Reaction arises. This also allows you to build a building material obtained, which is resistant to water leaching and which is then evident can also be processed underground. It is about but about a building material that is in dry form Is brought underground to be mixed with water and then to be processed further. According to DE-OS 40 18 568 it is additionally provided that the mixture at 120 to 180 ° C. heated and specifically dried by water evaporation, so that cement and plaster can be mixed in more easily. DE-OS 37 43 818 finally goes the opposite way, by waste lime etc. Materials by adding water, Iron II sulfate and thin acid processed into a mixture are then thermally treated at 200 to 800 ° C is then used later as a building material underground or to be used in road construction. With all these be Known process is disadvantageous in that it is only dry Material can be processed underground. You require thus complex transport routes. There is also an involvement the coarser mountains not possible with the known material.

Der Erfindung liegt daher die Aufgabe zugrunde, ein pastöses, pumpfähiges Versatzmaterial zu schaffen, das unter Übernahme von Stützfunktionen zur Verhinderung von Berg­ schäden beitragen kann. The invention is therefore based on the object to create pasty, pumpable filler material, which under Assumption of support functions to prevent mountain damage can contribute.  

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Eisensulfatsalz zunächst angelöst und die Neutralisation dann bis zu einem ph-Wert von oberhalb ph 9,0 durchgeführt wird, daß das neutralisierte Gemisch in die Form breiigen, pumpfähigen Stoffes gebracht und dann unter Tage als Versatz­ material abgeliefert wird.The object is achieved in that the iron sulfate salt first dissolved and the neutralization then carried out up to a pH of above pH 9.0 the neutralized mixture will mush into the mold, pumpable material and then underground as an offset material is delivered.

Bei einem derartigen Verfahren wird nicht nur der Trans­ port erleichtert, da man das breiige Gemisch gut pumpen kann, sondern es wird erstmals auch möglich, diese mit Schad­ stoffen behafteten Gemische unter Tage so einzubringen, daß sie weder auslaugen noch sonstigen Schaden anrichten können. Vielmehr wirken sie zusammen mit den stückigen Bergen als Stützfunktionsträger mit, die durch hohe Tragfestigkeit das Deckgebirge abstützen und so Bergschäden über Tage ver­ hindern. Darüber hinaus verschließen diese pastösen Gemische Luftspalte und Hohlräume zwischen den Bergen, was wetter­ führungsmäßige Vorteile mit sich bringt und auch das Weiter­ führen von Gasen verhindert. Insgesamt gesehen erfüllt das Verfahren somit eine Mehrfachfunktion, die als solche sich gerade im untertägigen Bergbau besonders vorteilhaft bemerk­ bar macht. Nach einer zweckmäßigen Ausführung der Erfindung ist vorgesehen, daß dem Eisensulfatsalz während der Neutra­ lisation oder vorher ein selbst Schwermetalle aus komplex­ bildnerhaltigen Abwässern abfangendes Fällungsmittel wie Triazin/Trithiol (TMT 15) zugegeben wird. Durch die entspre­ chende Ergänzung ist es möglich, auch komplizierte bzw. entsprechende Schadstoffe mit aus dem Abwasser bzw. Wasser herauszulösen, um sie dann sicher unter Tage in das Versatz­ material eingebunden ablagern zu können. Weitere Zusätze wie Zement, Gips u.ä. können zugesetzt werden, um so höhere Tragfestigkeiten im Untertagebergbau zu gewährleisten.With such a method, not only the Trans port easier, because you can pump the mushy mixture well can, but it is also possible for the first time to do this with harm to bring in mixtures containing substances that they neither leach nor do any other damage can. Rather, they work together with the lumpy mountains as a supporting function carrier with high load-bearing capacity support the overburden and thus prevent mining damage for days prevent. In addition, these pasty mixtures seal Air gaps and cavities between the mountains, what weather brings leadership advantages and also the next prevents gases. All in all, that fulfills The method thus has a multiple function, which as such Particularly advantageous in underground mining cash. After an expedient embodiment of the invention it is envisaged that the iron sulfate salt during neutra lisation or previously a self heavy metal from complex precipitating agent, such as Triazine / trithiol (TMT 15) is added. By the corresponding It is possible to add complicated or appropriate pollutants from wastewater or water to release them, then safely in the offset underground to be able to store material embedded. Other additives such as cement, plaster, etc. can be added, the higher To ensure load-bearing capacities in underground mining.

Claims (2)

1. Verfahren zur Herstellung eines Versatzmaterials für den untertägigen Bergbau aus Eisensulfatrückständen, wobei die insbesondere aus der Titanoxidgewinnung stammenden Eisensulfatsalze mit hohem Anteil freier Schwefelsäure durch Zugabe von Kalk oder kalkhaltiger Stoffe neutralisiert und dann insbesondere nach Zugabe von Bindemitteln wie Zement, Gips, Kalk unter Tage als Baustoffe eingesetzt werden, dadurch gekennzeichnet, daß das Eisensulfatsalz zunächst angelöst und die Neutrali­ sation dann bis zu einem ph-Wert von oberhalb ph 9,0 durchge­ führt wird, daß das neutralisierte Gemisch in die Form breiigen, pumpfähigen Stoffes gebracht und dann unter Tage als Versatzmaterial abgelagert wird.1. A process for producing a backfill material for underground mining from iron sulfate residues, the iron sulfate salts, in particular those from the titanium oxide extraction, having a high proportion of free sulfuric acid being neutralized by adding lime or calcareous substances and then in particular after adding binders such as cement, gypsum, lime underground are used as building materials, characterized in that the iron sulfate salt is first dissolved and the neutralization is then carried out up to a pH of above pH 9.0, that the neutralized mixture is brought into the form of pulpy, pumpable substance and then underground is deposited as backfill. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß dem Eisensulfatsalz während der Neutralisation ein Fällungsmittel zugegeben wird.2. The method according to claim 1, characterized, that the iron sulfate salt during neutralization a Precipitant is added.
DE19914103311 1991-02-04 1991-02-04 Neutralising iron sulphate salts - by dissolving in water and adding calcium to form pumpable paste for backfilling Granted DE4103311A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914103311 DE4103311A1 (en) 1991-02-04 1991-02-04 Neutralising iron sulphate salts - by dissolving in water and adding calcium to form pumpable paste for backfilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914103311 DE4103311A1 (en) 1991-02-04 1991-02-04 Neutralising iron sulphate salts - by dissolving in water and adding calcium to form pumpable paste for backfilling

Publications (2)

Publication Number Publication Date
DE4103311A1 DE4103311A1 (en) 1992-08-06
DE4103311C2 true DE4103311C2 (en) 1993-07-15

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ID=6424349

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DE19914103311 Granted DE4103311A1 (en) 1991-02-04 1991-02-04 Neutralising iron sulphate salts - by dissolving in water and adding calcium to form pumpable paste for backfilling

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717122A1 (en) * 1997-04-23 1998-10-29 Kali Umwelttechnik Sondershaus Mineral building material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE3937312A1 (en) * 1989-11-09 1991-05-16 Hoelter Heinz Solvent-resistant product for use in dam construction - made by mixing waste prodn. from some chemical processes
DE4018568A1 (en) * 1989-11-09 1991-12-12 Hoelter Heinz Building material for underground use - mfd. from titanium- and zinc-extraction residues, filter ash, calcium chloride from waste incineration etc. and binder e.g. cement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717122A1 (en) * 1997-04-23 1998-10-29 Kali Umwelttechnik Sondershaus Mineral building material

Also Published As

Publication number Publication date
DE4103311A1 (en) 1992-08-06

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OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee