DE2403738A1 - Bricks for electric storage heaters - using crushed iron ore bonded with water-glass and lithium hydroxide soln. - Google Patents

Bricks for electric storage heaters - using crushed iron ore bonded with water-glass and lithium hydroxide soln.

Info

Publication number
DE2403738A1
DE2403738A1 DE2403738A DE2403738A DE2403738A1 DE 2403738 A1 DE2403738 A1 DE 2403738A1 DE 2403738 A DE2403738 A DE 2403738A DE 2403738 A DE2403738 A DE 2403738A DE 2403738 A1 DE2403738 A1 DE 2403738A1
Authority
DE
Germany
Prior art keywords
bricks
lithium hydroxide
iron ore
glass
water
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
DE2403738A
Other languages
German (de)
Other versions
DE2403738C3 (en
DE2403738B2 (en
Inventor
G Dr Ing Erb
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.)
GNP GES fur NEUE INDUSTRIEPRO
Original Assignee
GNP GES fur NEUE INDUSTRIEPRO
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 GNP GES fur NEUE INDUSTRIEPRO filed Critical GNP GES fur NEUE INDUSTRIEPRO
Priority to DE19742403738 priority Critical patent/DE2403738C3/en
Priority claimed from DE19742403738 external-priority patent/DE2403738C3/en
Publication of DE2403738A1 publication Critical patent/DE2403738A1/en
Publication of DE2403738B2 publication Critical patent/DE2403738B2/en
Application granted granted Critical
Publication of DE2403738C3 publication Critical patent/DE2403738C3/en
Expired legal-status Critical Current

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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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/30—Oxides other than silica
    • 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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Powder Metallurgy (AREA)

Abstract

The process is for mfg. stones or bricks, esp. heat storage bricks, from a granulate, where a mixt. of water-glass and LiOH soln. is added to a mineral mixt. with size is not >0.3 mm to form a damp. mixt. which is moulded to the required shape. Na- and/or K water-glass is pref. used, mixed with 20% LiOH soln., the resultant mixt. being used in the ratio of 5 pts. to 100 pts. granulate which pref. contains 65% Fe and 5% SiO2, and is esp. iron ore with compsn. 65.9% Fe, 4.7% SiO2, 0.49% Al2O3, 0.01% Cr, 0.03% Mn, 0.01% Cu, 0.034% TiO2, 0.06% C, 0.1% CaO and 0.018% P. After mfr., the brick is pref. coated, at least partially with a surface heat conductor, esp. a colloidal silicon cpd. The bricks are used for electric storage heaters, e.g. night storage heaters. The bricks require no heating during their mfr. which is a substantial cost saving; furthermore, they are less expensive than the usual material, magnesite, and 15% more efficient in use.

Description

Verfahren zur Herstellung von Steinen aus Granulaten, insbesondere Wärmespeichersteinen Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Steiner. aus Granulaten, insbesondere Wärmespeichersteinen.Process for the production of stones from granules, in particular Heat storage stones The invention relates to a method of manufacturing from Steiner. made of granules, in particular heat storage stones.

Solene Speichersteine haben die Aufgabe, durch Elektroenergie - beispielsweise während des billigen Nachtstromtarifes -erzeugte Wärme für eine spätere Wärmeabgabe zu speichern.Solene storage stones have the task of using electrical energy - for example Heat generated during the cheap night electricity tariff for later heat release save.

Diese spätere Wärmeabgabe erfolgt dabei entweder durch natürliche Konvektion oder durch erzwungene Wärmeentladung über eingebaute Lüfter, die unter Umständen über Raumthermostate gesteuert sind. Im übrigen sind die Speichersteine in sogenannten Elektrospeicherheizgeräten untergebracht.This later release of heat occurs either naturally Convection or by forced heat discharge via built-in fans, which are below Controlled by room thermostats. In addition, the storage stones are housed in so-called electric storage heaters.

Be den bekannten Speichersteinen wird als wesentlicher Grundstoff Magnesit verwendet. Der Magnesit wird zur Herstellung der Steine als Granulat aufgemahlen und unter Anwendung von Druck oei hohen Temperaturen gepreßt. Abgesehen davon, daß es sick bei Magnesit um einen sehr teuren Rchstoff handelt, ist auch das Herstellungsverfahren an sich sehr teuer, da ein erheblicher Wärmebedarf besteht.The well-known storage stones are used as an essential raw material Magnesite used. The magnesite is ground as granules for the production of the stones and pressed with the application of pressure at high temperatures. Besides that if magnesite is a very expensive substance, so is the manufacturing process in itself very expensive, since there is a considerable heat requirement.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Speicherstein zu schafen, der einmal ohne die Verwendung des teuren Magnesit auskommt und der zum anderen ohne Wärmebedarf herzustellen ist.The invention is therefore based on the object of a memory stone to sheep who can do without the use of expensive magnesite and the on the other hand, can be produced without the need for heat.

Zur Lösung dieser Aufgabe wird vorgeschlagen, daß ein auf den Korngrößenbereich von >0 bis 0,3 mm aufgeschlossenes Mineralgemisch mit einem Gemisch aus einer Wasserglas-und Lithiumhydroxyclosung zu einer erdfeuchten Mischung vermischt und anschließend in einer Formpresse zu der gewünschten Steinform verpreßt wird.To solve this problem, it is proposed that a grain size range from> 0 to 0.3 mm digested mineral mixture with a mixture of one Water glass and Lithiumhydroxyclosung mixed and mixed to form an earth-moist mixture is then pressed in a molding press to the desired stone shape.

Als Wasserglas Kann erfindungsgemäß sowohl Natron- und/oder Kaliwasserglas verwendet werden. Die Dithiumhyoxydlösung liegt vorzugsweise als 20 prozentige Lösung vor. Im übrigen ist ein optimales Mischungsverhältnis dann gegeben, wenn das Verhältnis von Granulat zu dem Gemisch aus der Wasserglas- und. Lithiumny@roxydiösung 100: 5 beträgt.According to the invention, both soda and / or potassium waterglass can be used as the water glass be used. The dithium hydroxide solution is preferably a 20 percent solution before. In addition, an optimal mixing ratio is given if the ratio of granules to the mixture of the water glass and. Lithiumny @ roxydiösung 100: 5 is.

Nach einem weiteren Merkmal der Erfindung ist vorgesehell, daß das Granulat aus einem quarzhaltigem Eisenerz besteht. Es hat sich herausgestellt, daß gerade ein solches Granulat sich hervorragend für die Herstellung von Wärmespe icherste inen nach dem erfindungsgemäßen Verfahren eignet. Bevorzugt weist das Granulat dabei einen Gehalt von zirka 65 % Eisen und zirka 5% Quarz auf.According to a further feature of the invention it is provided that the Granulate consists of a quartz-containing iron ore. It turned out that Such a granulate is ideal for the production of heat storage devices suitable for the process according to the invention. The granulate preferably has a content of around 65% iron and around 5% quartz.

Ganz besonders vorteilhaft hat sich ein Eisenerz erwiesen, das folgende Zusammensetzung hat: Fe = 65,9 % ; SiO2 = 4,7 % ; Al2 O3 = 0,49 % ; Cr = 0,0 1%; Cu = 0,01% ; Ti O2 = 0,034 % ; 0 = 0,0 6% ; Ca 0 = 0,1% ; P = 0,018%.; Mn = 0,03%.An iron ore has proven to be particularly advantageous, the following Composition has: Fe = 65.9%; SiO2 = 4.7%; Al2 O3 = 0.49%; Cr = 0.0 1%; Cu = 0.01%; Ti O2 = 0.034%; 0 = 0.0 6%; Ca 0 = 0.1%; P = 0.018%; Mn = 0.03%.

Schließlich sieht die Erfindung vor, dai3 nach der Herstellung der Speichersteinen unmittelbar auf diese ein Flächenheizleiter aufgebracht wird, der zweckmäßig aus einer Schicht heizkörnigem, vorzugsweise kolloidalem Silicium bzw. kolloida lem Silic iumve rbindungen besteht.Finally, the invention provides that after the production of the Storage stones are applied directly to this a surface heating conductor, which expediently from a layer of heated grain, preferably colloidal silicon or colloidal and silicon compounds.

Dazu werden das in einem Dispersionsmittel (wässrige Lösung) vorliegende kolloidalen Silicium bzw. die kolloidalen Siliciumverbindungen wie eine Farbe auf den Speicherstein aufgestrichen. Sobald das Lösungsmittel verdunstet ist, verbleibt auf dem Speicherstein eine geschlossene Schicht, die mit ihrem Widerstand elektrischen Stromfluß in Wärme umwandelt und im Speicherstein zuführt. Infolge der sehr guten Wärmleitfähigkeit solcher Siliciumschichten sind Üngleichmäßigkeiten in der Schichtdicke ohne gravierende Bedeutungen.For this purpose, the present in a dispersant (aqueous solution) colloidal silicon or the colloidal silicon compounds like a color the storage stone spread. Once the solvent has evaporated, it remains a closed layer on the storage stone, which with its resistance is electrical Converts current flow into heat and supplies it in the storage stone. As a result of the very good Thermal conductivity of such silicon layers are irregularities in the layer thickness without any serious significance.

Solche Ung@eichmäßigkeiten können beispie lsweise bei einem Pinselanstrich auftreten.Such irregularities can occur, for example, when painting with a brush appear.

Es hat sich herausgestellt, daß die nach dem erfindungsgemäßen Verfahren hergestellten Speicherelemente etwa um 15% diejenigen werte übertrifft, die Magnesit auch zeigt, wobei in vorteilhalter Weise zu der Herstellung nicht einmal Wärme aufgewendet werden muss. Die obere Temperaturbelastbarkeit der erflndungsgemäßen Speichersteine liegt bei etwa 1000 bis 1100 C, einer Temperatur also, wie sie Deim voreschriebenen Zweck niemals auftritt.It has been found that by the method according to the invention produced memory elements by about 15% exceeds those values that magnesite also shows, wherein in an advantageous manner not even heat is expended for the production must become. The upper temperature resistance of the storage stones according to the invention is around 1000 to 1100 C, a temperature as prescribed by Deim Purpose never occurs.

Claims (9)

A n s p r ü c h eExpectations 1. Verfahren zur herstellung von Steinen aus Granulaten, insbesondere wärmespeichersteine, dadurch gekennzeichnet, daM ein auf den Korngräßenbereich von >0 bis 0,3 mm aufgeschlossenes Mineralgemisch mit einem Gemisch aus einer Wasserglas- und Lithiumhydroxydlösung zu einer erdfeuchten Mischung vermischt und anschließend in einer Formpresse zu aer gewünschten Steinform verpreJt wird.1. Process for the production of stones from granules, in particular heat storage stones, characterized in that a grain size range of > 0 to 0.3 mm digested mineral mixture with a mixture of a water glass and lithium hydroxide solution mixed to form an earth-moist mixture and then is pressed in a molding press to the desired stone shape. 2. Verfanren nach Asspruch 1, dadurch gekennzeichnet, durch die Ver@endung von Natron- und/oder Kaliwasserglas.2. Verfanren according to Ass claim 1, characterized by the Ver @ ending of soda and / or potassium water glass. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Verh@ltais von Granulat zu dem Gemisch aus der Wasserglas- und Lithiumhydroxydlösung 100:5 beträgt.3. The method according to claim 1 or 2, characterized in that the Ratio of granules to the mixture of the water glass and lithium hydroxide solution 100: 5. 4. Verfahren Aach A@spruch i bis 3, dadurch gekennzeichnet, daß die Lithiumhydroxydlösung als 20 prozentige Lösung vorliegt.4. The method Aach A @ claim i to 3, characterized in that the Lithium hydroxide solution is present as a 20 percent solution. 5. Verfahren nach Anspruen 1 bis 4, dadurch gekennzeichnet, daß das Granulat aus einem quarzhaltigen Eisenerz besient.5. The method according to Anspruen 1 to 4, characterized in that the Granulate from an iron ore containing quartz. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, da@ das Granulat einen Gehalt von zirka 65 % Eisen und zirka 5% Quarz aufweist.6. The method according to claim 5, characterized in that @ the granules has a content of around 65% iron and around 5% quartz. 7. Verfahren nach @nspruch 6, dadurch gekennzeichnet, daß das Eisenerz folgende Zusammensetzung aufweist: Fe = 65,9% ; SiO2 = 4, @@ ; Al2O3 = 0,49% ; Cr = 0,01%; @n = 0,03% ; Cu = 0,01% ; TiO2 = 0,034 % ; C = 0,06% ; CaO = 0,1% ; P = 0,018%.7. The method according to @nspruch 6, characterized in that the iron ore has the following composition: Fe = 65.9%; SiO2 = 4, @@; Al2O3 = 0.49%; Cr = 0.01%; @n = 0.03%; Cu = 0.01%; TiO2 = 0.034%; C = 0.06%; CaO = 0.1%; P = 0.018%. 8. Verfahren nach Anspruch 1 bis @, dadurch gekennzeichnet, daß nach der Herstellung Speichersteines dieser wenigstens tei@weise mit einem Flachenheiz@eiter beschichtet wird.8. The method according to claim 1 to @, characterized in that according to the production of the storage stone at least partially with a flat heater is coated. 9. Verfabren nach Anspruch 8, dadurch gekennzeichnet, daß der Flächenheizleiter aus einer Schicht feinstkörnigen, vorzugsweise kolloidalem Silicium bzw. kolloidalem Siliciumverbindungen besteht.9. method according to claim 8, characterized in that the surface heating conductor from a layer of very fine-grained, preferably colloidal silicon or colloidal Silicon compounds.
DE19742403738 1974-01-26 Process for the production of heat storage stones Expired DE2403738C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742403738 DE2403738C3 (en) 1974-01-26 Process for the production of heat storage stones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742403738 DE2403738C3 (en) 1974-01-26 Process for the production of heat storage stones

Publications (3)

Publication Number Publication Date
DE2403738A1 true DE2403738A1 (en) 1975-07-31
DE2403738B2 DE2403738B2 (en) 1976-12-23
DE2403738C3 DE2403738C3 (en) 1977-08-11

Family

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2388241A1 (en) * 1977-04-22 1978-11-17 Dornier System Gmbh LATENT HEAT ACCUMULATOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2388241A1 (en) * 1977-04-22 1978-11-17 Dornier System Gmbh LATENT HEAT ACCUMULATOR

Also Published As

Publication number Publication date
DE2403738B2 (en) 1976-12-23

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee