DE1074481B - Process to improve the extinguishing behavior of gray lime - Google Patents
Process to improve the extinguishing behavior of gray limeInfo
- 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
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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/06—Slaking 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)
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)
| 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)
| 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 |
-
0
- DE DENDAT1074481D patent/DE1074481B/en active Pending
Patent Citations (2)
| 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)
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE1074481B (en) | Process to improve the extinguishing behavior of gray lime | |
| DE454744C (en) | Process for the production of porous artificial stones | |
| DE358301C (en) | Process for the production of waterproofing agents for concrete, lime, mortar u. like | |
| DE626828C (en) | Process for removing lime, dolomite or other lime-rich substances | |
| DE353130C (en) | Process for neutralizing chrome leather | |
| DE409894C (en) | Process for the neutralization of oils and fatty bodies | |
| DE416942C (en) | Process for producing fuel briquettes from coal | |
| DE492454C (en) | Heat-generating filling for heating pads or the like. | |
| DE429654C (en) | Process for the decomposition of magnesium chlorine by means of steam | |
| DE397474C (en) | Process for the production of a fertilizer | |
| DE748651C (en) | Process for the production of high-percentage potassium humate fertilizers | |
| DE382004C (en) | Process for the production of ammonium sulfate from calcium sulfate with ammonia and carbonic acid | |
| AT127450B (en) | Process for the production of dolomite cement. | |
| AT159300B (en) | Process for deliming ashed hides and pelts. | |
| DE453265C (en) | Process for the production of porous building materials | |
| AT103912B (en) | Process for the treatment of brewing water. | |
| GB1001964A (en) | Improvements in or relating to detergent compositions in bar form | |
| AT105588B (en) | Process for the treatment of brewing water. | |
| DE585423C (en) | Manufacture of potash | |
| DE396343C (en) | Process for preserving metaldehyde | |
| AT24372B (en) | Process for the preparation of caustic alkalis or carbonate alkalis. | |
| AT46784B (en) | Method of treating buttons or other objects made from dump palm nut. | |
| AT125198B (en) | Method of treatment using nitrogen-oxygen compounds. | |
| DE353232C (en) | Process for the production of soft and hard rubber-like masses | |
| DE545830C (en) | Process for the preparation of alkali ferrocyanide |