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DE1074481B - Process to improve the extinguishing behavior of gray lime - Google Patents

Process to improve the extinguishing behavior of gray lime

Info

Publication number
DE1074481B
DE1074481B DENDAT1074481D DE1074481DA DE1074481B DE 1074481 B DE1074481 B DE 1074481B DE NDAT1074481 D DENDAT1074481 D DE NDAT1074481D DE 1074481D A DE1074481D A DE 1074481DA DE 1074481 B DE1074481 B DE 1074481B
Authority
DE
Germany
Prior art keywords
lime
improve
extinguishing
extinguishing behavior
gray
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.)
Pending
Application number
DENDAT1074481D
Other languages
German (de)
Inventor
rcr pol Ludwig Horlmg jun und Ludwig Flor 1mg sen Bad Pyrmont Dipl
Original Assignee
Ludwig Horling Chemische Bau stoffe Bad Pyrmont
Publication date
Publication of DE1074481B publication Critical patent/DE1074481B/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C04B2/00Lime, magnesia or dolomite
    • C04B2/02Lime
    • C04B2/04Slaking
    • C04B2/06Slaking with addition of substances, e.g. hydrophobic agents ; Slaking in the presence of other compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

Verfahren zur Verbesserung des Ablöschverhaltens von Graukalk Es ist bekannt, daß dolomitische Kalke einen erhöhten Zeitbedarf zum Ablöschen benötigen und daß der Grad der Hydratation im allgemeinen unvollständig ist.Process to improve the extinguishing behavior of gray lime It is known that dolomitic limestones require an increased amount of time to extinguish and that the degree of hydration is generally incomplete.

Es ist auch bekannt, durch Behandlung bei erhöhter Temperatur einen besseren Ablöschgrad und eine weitgehende Hydratation zu erzielen.It is also known to induce treatment at elevated temperature to achieve a better degree of extinguishing and extensive hydration.

Diese Maßnahme ist jedoch nur mit verhältnismäßig großem technischem Aufwand durchführbar, und der wirtschaftliche Vorteil steht meist in keinem entsprechenden Verhältnis.However, this measure is only with a relatively large technical Effort feasible, and the economic advantage is usually not in a corresponding one Relationship.

Es wurde nun überraschenderweise gefunden, daß das Einleiten des Ablöschvorganges und in der Folge der Ablauf des Hydratationsprozesses in außerordentlich günstiger Weise beeinflußt werden kann durch Zusatz geringer Mengen eines Alkalialuminates. Es ist dabei für den Verlauf des Prozesses gleichgültig, ob das Aluminat vor oder beim Ablöschprozeß selbst zugeführt wird.It has now surprisingly been found that the initiation of the extinguishing process and as a result the hydration process is extremely beneficial This can be influenced by adding small amounts of an alkali metal aluminate. It is irrelevant for the course of the process whether the aluminate is before or is supplied during the quenching process itself.

Die Technik des Verfahrens gestaltet sich folgendermaßen: Es wird entweder eine Trockenmischung des gebrannten Kalkes mit der die maximale Wirkung bringenden Menge des Aluminates in an sich bekannter Weise und mit an sich bekannten Maschinen vorgenommen, oder es erfolgt die Zugabe des Aluminates in fester, vorzugsweise jedoch flüssiger Form beim Ablöschprozeß.The technique of the procedure is as follows: It becomes either a dry mixture of quicklime with the maximum effect bringing amount of the aluminate in a manner known per se and with known per se Machines made, or the addition of the aluminate takes place in solid, preferably but in liquid form during the quenching process.

Der Verlauf der Reaktionsbereitschaft bei der Hydratation zeigt sich unmittelbar durch Erhöhung des Temperaturanstieges über das an sich bekannte Maß dieser Kalksorten.The course of the readiness to react during hydration is shown directly by increasing the temperature rise above the level known per se of these types of lime.

Beispiel Es werden auf 100 kg des abzulöschenden Kalkes 0,2 bis 0,6 kg, vorzugsweise 0,4 kg, eines Alkalialuminates, insbesondere des Natriumaluminates, zugegeben, und zwar beim Zusatz des festen Aluminates in das entsprechende Mischaggregat oder beim Einsatz der Lösung unter Berücksichtigung des Löschwasserbedarfes, beim Ablöschprozeß. In beiden Fällen zeigt der abzulöschende Kalk eine Erhöhung des Umsatzgrades mit dem Löschwasser und dadurch eine verstärkte Hydratation.Example For every 100 kg of lime to be slaked, 0.2 to 0.6 kg, preferably 0.4 kg, of an alkali aluminate, especially sodium aluminate, added, namely when adding the solid aluminate to the appropriate mixing unit or when using the solution, taking into account the extinguishing water requirement, at Quenching process. In both cases, the lime to be slaked shows an increase in the degree of conversion with the extinguishing water and thereby increased hydration.

Claims (1)

PATENTANSPRUCH: Verfahren zur Verbesserung des Ablöschverhaltens von Kalk, insbesondere Graukalk, dadurch gekennzeichnet, daß zu 100 kg gebranntem Kalk, vor oder beim Ablöschen 0,2 bis 0,6, vorzugsweise 0;4 kg Alkalialuminate in fester oder flüssiger Form dem Kalk zugesetzt werden. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 626 828; französische Patentschrift Nr. 984 591.PATENT CLAIM: Process to improve the extinguishing behavior of Lime, especially gray lime, characterized in that 100 kg of quicklime, before or during quenching 0.2 to 0.6, preferably 0.4 kg of alkali aluminates in solid or liquid form can be added to the lime. Considered publications: German Patent No. 626,828; French patent specification No. 984 591.
DENDAT1074481D Process to improve the extinguishing behavior of gray lime Pending DE1074481B (en)

Publications (1)

Publication Number Publication Date
DE1074481B true DE1074481B (en) 1960-01-28

Family

ID=598519

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT1074481D Pending DE1074481B (en) Process to improve the extinguishing behavior of gray lime

Country Status (1)

Country Link
DE (1) DE1074481B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2958856B1 (en) 2013-02-19 2019-08-28 S.A. Lhoist Recherche Et Developpement Method for the dry slaking of calcium oxides and magnesium from calcomagnesian compounds

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE626828C (en) * 1932-09-18 1936-03-03 Kloeckner Werke Ag Process for removing lime, dolomite or other lime-rich substances
FR984591A (en) * 1949-02-14 1951-07-09 Engrais Magnesiens Du Nord Soc Process for extinguishing magnesian or fatty lime and resulting industrial products

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE626828C (en) * 1932-09-18 1936-03-03 Kloeckner Werke Ag Process for removing lime, dolomite or other lime-rich substances
FR984591A (en) * 1949-02-14 1951-07-09 Engrais Magnesiens Du Nord Soc Process for extinguishing magnesian or fatty lime and resulting industrial products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2958856B1 (en) 2013-02-19 2019-08-28 S.A. Lhoist Recherche Et Developpement Method for the dry slaking of calcium oxides and magnesium from calcomagnesian compounds

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