DE3604825A1 - Process for disposing of crude gypsum in flotation tailings in underground mining - Google Patents

Process for disposing of crude gypsum in flotation tailings in underground mining

Info

Publication number
DE3604825A1
DE3604825A1 DE19863604825 DE3604825A DE3604825A1 DE 3604825 A1 DE3604825 A1 DE 3604825A1 DE 19863604825 DE19863604825 DE 19863604825 DE 3604825 A DE3604825 A DE 3604825A DE 3604825 A1 DE3604825 A1 DE 3604825A1
Authority
DE
Germany
Prior art keywords
underground
mixed
chloride content
mining
underground mining
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
DE19863604825
Other languages
German (de)
Other versions
DE3604825C2 (en
Inventor
Heinz Dipl Ing Hoelter
Heinrich Ing Grad Gresch
Heinrich Dipl Ing Igelbuescher
Heribert Dipl Ing Dewert
Sigurd Dipl Ing Jorzyk
Guido Dr Klinkner
Frank Dr Fink
Bernhard Dipl Ing Schmid
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 DE19863604825 priority Critical patent/DE3604825A1/en
Publication of DE3604825A1 publication Critical patent/DE3604825A1/en
Application granted granted Critical
Publication of DE3604825C2 publication Critical patent/DE3604825C2/de
Granted legal-status Critical Current

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
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
    • C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
    • C04B11/264—Gypsum from the desulfurisation of flue gases
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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

Abstract

In underground mining, depending on circumstances underground and above ground, a part of the hollow spaces produced by mining have to be subsequently refilled. For this purpose, the tailings arising from processing, in particular, are again brought underground and dumped or blown there. Crude gypsum from flue-gas desulphurisation plants is mixed with these tailings, this partly dewatered, not yet calcined calcium sulphate dihydrate having a calcium chloride content from 0.5 to 8% of CaCl2 being mixed with water and then converted into a Newtonian liquid by addition of stabilisers. This mixture, optionally with the addition of filter ash, is then mixed underground into the gob material, with the stabilisers making possible advantageous safe transport in the pipes from above ground to underground.

Description

Es ist bekannt, Bergedämme, Bergeversatz mit Rück­ ständen aus dem Waschbergebereich bzw. Brechberge­ bereich mit Gips zu versetzen und Dammbaustoffe bzw. Versatzbaustoffe herzustellen.It is well-known, dams, mountains offset with back stands from the washing mountain area or crushing mountains area with gypsum and dam building materials or Manufacture backfill materials.

Hinter Rauchgasentschwefelungsanlagen fällt Rohgips als Dihydrat an und ist ein preiswerter Stoff, der mit seinem Calciumchloridgehalt als staubbindefähige Masse dem Bergeversatz zugeführt werden kann.Raw gypsum falls behind flue gas desulphurization plants as a dihydrate and is an inexpensive substance that with its calcium chloride content as dust-binding Mass can be fed to the offset.

Erfindungsgemäß wird vorgeschlagen, das Calciumdihydrat mit einem Calciumchloridgehalt von 0,5-8% CaCl2 in eine wässrige Suspension zu überführen und mit hydraulisch nicht abbindenden Additiven zu versetzen, vorzugsweise Bentonit, so daß hierdurch die Gewähr ge­ geben ist, eine staubbindefähige Masse über Fall-Leitungen im Hauptförderschacht durch die hydraulische Förderhöhe zu befördern und dadurch zwangsläufig die Möglichkeit geboten wird, über die Quer- und Richtstrecken bis zum Abbaubetriebspunkt ein statisch homogenes Stabilisat für den Bergeversatz zu bekommen, das sich nicht absetzt, sondern eine newtonische Flüssigkeit darstellt, in der sich keine Feststoffe absetzen, die thixotrope Eigen­ schaften haben.According to the invention it is proposed to convert the calcium dihydrate with a calcium chloride content of 0.5-8% CaCl 2 into an aqueous suspension and to add hydraulically non-setting additives, preferably bentonite, so that this gives the guarantee of a dust-binding mass over case -Pushing pipes in the main shaft through the hydraulic head, which inevitably offers the opportunity to get a statically homogeneous stabilizer for the mountains offset over the cross and straightening routes up to the mining operating point, which does not settle, but is a Newtonian liquid in which no solids settle that have thixotropic properties.

Bentonit ist einer der Zuschlagstoffe, der eine Sedimentation verhindert.Bentonite is one of the aggregates, the one Prevents sedimentation.

Erfindungsgemäß wird weiter vorgeschlagen, diese Rohgips­ verflüssigung mit weiteren Zuschlagstoffen,wie Filter­ asche aus den Kraftwerksfiltern, zu versetzen.According to the invention, this raw gypsum is further proposed liquefaction with other additives, such as filters ash from the power plant filters.

Claims (3)

1. Verfahren zum Einbringen von Rohgips aus Rauchgas­ entschwefelungsanlagen in den Untertage-Bergbau dadurch gekennzeichnet, daß aus dem teilentwässerten, noch nicht calcinierten Calciumsulfatdihydrat mit einem Calciumchloridanteil von 0,5-8% CaCl2 durch Zusatz von Wasser eine Suspension gebildet wird, die durch Zusatz von ein- oder mehreren Stabilisaten in eine newtonische Flüssigkeit überführt wird, um eine Sedimentation der Feststoffe mit thixotropen Eigenschaften beim Stehen oder Transport über Fall- oder Rohrleitungen zu verhindern.1. Process for introducing raw gypsum from flue gas desulfurization systems in underground mining, characterized in that a suspension is formed from the partially dewatered, not yet calcined calcium sulfate dihydrate with a calcium chloride content of 0.5-8% CaCl 2 by adding water Addition of one or more stabilizers is transferred to a Newtonian liquid in order to prevent sedimentation of the solids with thixotropic properties when standing or being transported via downpipes or pipelines. 2. Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß die genannte Flüssigkeit, die als Zuschlagstoff zum Bergeversatz Anwendung findet, durch Zusatz von Filteraschen eingedickt wird. 2. The method according to claim 1, characterized in that the liquid mentioned as an aggregate for mountains offset is used by adding Filter ash is thickened.   3. Verfahren nach Anspruch 1-2 dadurch gekennzeichnet, daß als Stabilisat bevorzugt Bentonit Anwendung findet und der Calciumchloridgehalt 0,5-8% beträgt.3. The method according to claim 1-2, characterized in that bentonite is preferably used as the stabilizer and the calcium chloride content is 0.5-8%.
DE19863604825 1986-02-15 1986-02-15 Process for disposing of crude gypsum in flotation tailings in underground mining Granted DE3604825A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863604825 DE3604825A1 (en) 1986-02-15 1986-02-15 Process for disposing of crude gypsum in flotation tailings in underground mining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863604825 DE3604825A1 (en) 1986-02-15 1986-02-15 Process for disposing of crude gypsum in flotation tailings in underground mining

Publications (2)

Publication Number Publication Date
DE3604825A1 true DE3604825A1 (en) 1987-08-20
DE3604825C2 DE3604825C2 (en) 1988-12-08

Family

ID=6294170

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863604825 Granted DE3604825A1 (en) 1986-02-15 1986-02-15 Process for disposing of crude gypsum in flotation tailings in underground mining

Country Status (1)

Country Link
DE (1) DE3604825A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743818A1 (en) * 1987-12-23 1989-07-06 Hoelter Heinz Conversion of waste materials from dry or pseudo-dry desulphurisation plants based on lime into building materials for underground mining
DE3802429A1 (en) * 1987-10-31 1989-08-31 Hoelter Heinz Reprocessing and conversion of contaminated problem waste materials into products for the production of load-bearing building materials for underground mining
DE3811325A1 (en) * 1988-04-02 1989-10-12 Hoelter Heinz Aggregate for mining packing
EP3110729A4 (en) * 2014-02-24 2017-11-01 Active Minerals International LLC Backfill, methods of making, and use thereof
CN107654256A (en) * 2017-09-14 2018-02-02 北京科技大学 A kind of mine anury exhaust system and method based on deep wimble thickener

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205354C2 (en) * 1992-02-21 1994-01-27 Anneliese Zementwerke Ag Dry mix for the production of hydromechanically conveyable building material suspensions and their use

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3207390A1 (en) * 1982-03-02 1983-09-15 Gesteins- Und Tiefbau Gmbh, 4350 Recklinghausen METHOD FOR RECYCLING WASHER MOUNTAINS RECOVERED FROM PRIMARY COAL, IN PARTICULAR FROM THE UNDERGROUND MINING
DE3209266A1 (en) * 1982-03-13 1983-10-13 Heinz Dipl.-Ing. 4390 Gladbeck Hölter Process for utilising spoil from coal mining
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
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
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
DE3219197C2 (en) * 1982-05-21 1984-07-12 Saarbergwerke AG, 6600 Saarbrücken Construction material for underground mining
DE3347234A1 (en) * 1983-12-28 1985-07-11 Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen Filling material for brown coal open cast mining pits

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3207390A1 (en) * 1982-03-02 1983-09-15 Gesteins- Und Tiefbau Gmbh, 4350 Recklinghausen METHOD FOR RECYCLING WASHER MOUNTAINS RECOVERED FROM PRIMARY COAL, IN PARTICULAR FROM THE UNDERGROUND MINING
DE3209266A1 (en) * 1982-03-13 1983-10-13 Heinz Dipl.-Ing. 4390 Gladbeck Hölter Process for utilising spoil from coal mining
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
DE3219197C2 (en) * 1982-05-21 1984-07-12 Saarbergwerke AG, 6600 Saarbrücken Construction material for underground mining
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
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
DE3347234A1 (en) * 1983-12-28 1985-07-11 Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen Filling material for brown coal open cast mining pits

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BE-Z: Annales des Mines de Belgique, November 1974, S.1082 *
DE-Z: Glückauf, 111, 1975, S.114-119 *
FR-Z: Industrie Minerale-Mine, Juni 1973, S.106 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3802429A1 (en) * 1987-10-31 1989-08-31 Hoelter Heinz Reprocessing and conversion of contaminated problem waste materials into products for the production of load-bearing building materials for underground mining
DE3743818A1 (en) * 1987-12-23 1989-07-06 Hoelter Heinz Conversion of waste materials from dry or pseudo-dry desulphurisation plants based on lime into building materials for underground mining
DE3811325A1 (en) * 1988-04-02 1989-10-12 Hoelter Heinz Aggregate for mining packing
EP3110729A4 (en) * 2014-02-24 2017-11-01 Active Minerals International LLC Backfill, methods of making, and use thereof
CN107654256A (en) * 2017-09-14 2018-02-02 北京科技大学 A kind of mine anury exhaust system and method based on deep wimble thickener

Also Published As

Publication number Publication date
DE3604825C2 (en) 1988-12-08

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Legal Events

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OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
OP8 Request for examination as to paragraph 44 patent law
8125 Change of the main classification

Ipc: E21D 11/04

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee