DE1209476B - Artificial stone for the storage core of night storage heaters - Google Patents
Artificial stone for the storage core of night storage heatersInfo
- Publication number
- DE1209476B DE1209476B DESCH35457A DESC035457A DE1209476B DE 1209476 B DE1209476 B DE 1209476B DE SCH35457 A DESCH35457 A DE SCH35457A DE SC035457 A DESC035457 A DE SC035457A DE 1209476 B DE1209476 B DE 1209476B
- Authority
- DE
- Germany
- Prior art keywords
- slag
- storage
- alumina
- low
- night
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/42—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromites
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/12—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromium oxide
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/44—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminates
Description
Kunststein für den Speicherkern von Nachtstrom-Speicheröfen Seit einigen Jahren werden Wohn- und Büroräume in zunehmendem Maße mit Nachtstrom-Speicheröfen ausgestattet.Artificial stone for the storage core of night storage heaters Years, living and office spaces will increasingly be fitted with night-time storage heaters fitted.
In der Regel sind die Speicherkerne dieser Öfen aus Schamotte, Sillimanit, Betonstein, Speckstein oder Olivin aufgebaut.As a rule, the storage cores of these furnaces are made of chamotte, sillimanite, Concrete stone, soapstone or olivine.
Bei Schamotte- und Sillitnanitsteinen handelt es sich um keramisch gebundene feuerfeste Baustoffe des Systems A1203 - S'02 mit Tonerdegehalten zwischen 30 und 70°/o. Betonstein besteht aus silikatischen Zuschlagstoffen (feuerfeste Zuschlagsstoffe, bestimmte Schwerhüttenschlacken und Schwergestein), die mit Tonerdeschmelzzetnent gebunden sind. Speckstein-und Olivinsteine sind feuerfeste Baustoffe des Systems Mg0 - S'02 oder M-0 -- A103 - S'02 mit Magnesiumgehalten zwischen 30 und 60°/o.Fireclay and sillitnanite stones are ceramic bound refractory building materials of the system A1203 - S'02 with an alumina content between 30 and 70 ° / o. Concrete block consists of silicate aggregates (refractory aggregates, certain heavy slag and heavy rock) that contain alumina melting are bound. Soapstone and olivine stones are the system's refractory building materials Mg0 - S'02 or M-0 - A103 - S'02 with magnesium contents between 30 and 60%.
In Zimmern, in denen auf besonders kleinen Raumbedarf der Nachtstrom-Speicheröfen Wert gelegt wird, sind die Speicherkerne aus Magnesitsteinen oder Chrommagnesitsteinen aufgemauert, weil diese etwa die doppelte Wärmespeicherfähigkeit pro Vol-Einheit haben als die zuvor genannten Baustoffe. Magnesit-und Chrommagnesitsteine bestehen zu mehr als 800/, aus Magnesiumoxyd und sind daher sehr teuer.In rooms in which the night-time storage heaters take up particularly little space, the storage cores are made of magnesite bricks or chromium magnesite bricks, because they have about twice the heat storage capacity per unit volume than the building materials mentioned above. Magnesite and chromium magnesite stones consist of more than 800 /, of magnesium oxide and are therefore very expensive.
Es wurde nun gefunden, daß sich den Magnesitsteinen vollkommen gleichwertige Steine mit einem wesentlich geringeren Anteil an Magnesiumoxyd unter Verwendung von Abfallprodukten der Tonerdefabrikation herstellen lassen, in dem man kaustisch gebranntes Magnesiumoxyd, hochtonerdehaltige Hüttenschlacke und Rotschlamm aus der Tonerdefabrikation in solchen Mengenverhältnissen mischt, daß im fertiggebrannten Stein das Molverhältnis von MgO: M203 zwischen 0,5 und 2 liegt und der Gehalt an Fe203 zwischen 5 und 3501, beträgt.It has now been found that stones of the same quality as magnesite bricks with a significantly lower proportion of magnesium oxide can be produced using waste products from alumina production by mixing caustic-burnt magnesium oxide, high alumina slag and red mud from alumina production in such proportions that in the finished burned product Stein, the molar ratio of MgO: M203 is between 0.5 and 2 and the Fe203 content is between 5 and 3501 .
Rotschlamm fällt bei der Tonerdefabrikation, hochtonerdehaltige Hüttenschlacke in der Hüttenindustrie als Abfallprodukt an. An Stelle der Hüttenschlacke kann man auch kieselsäurearmen, eisenreichen Bauxit verwenden.Red mud falls during alumina production, high alumina slag in the metallurgical industry as a waste product. Instead of the slag you can also use low-silica, iron-rich bauxite.
Steht hochtonerdehaltige Hüttenschlacke in großen Mengen zur Verfügung, dann kann man diese zusammen mit kaustisch gebrannter Magnesia und Bariumkarbonat oder -hydroxyd zu Kunststeinen verarbeiten, die den Magnesitsteinen gleichwertig sind, wenn man sie in solchen Mengenverhältnissen mischt, daß im fertiggebrannten Stein das Molverhältnis von Mg0 : A1203 zwischen 0,5 und 2 liegt und der Gehalt an Ba0 zwischen 5 und 350/, beträgt. An Stelle von Hüttenschlacke kann man in diesem Fall eisenarmen und kieselsäurearmen Bauxit verwenden. Beispiel l Zur Herstellung der Steine werden zunächst 1501, Magnesia, 5001, hochtonerdehaltige Hüttenschlacke und 200/, Rotschlamm sorgfältig gemischt. Durch Brennen bei Temperaturen oberhalb 1400°C wird daraus ein Sintererzeugnis hergestellt. Dieser Sinter wird anschließend zerkleinert. Aus dem Bruch werden entsprechend den bekannten Körnungskurven von Fuller, Andreasen oder Litzow geeignete Körnungen herausgesiebt und im Hinblick auf eine möglichst dichte Packung in bekanntem Verhältnis gemischt. Der Mischung werden 15 °/o feingemahlenes Magnesitmehl oder 15 °/o kaustisch gebrannte Magnesia als Bindemittel, ferner Klebzusätze, wie Sulfitablauge, Melasse od. dgl., und Anmachwasser zugegeben, bis sich eine formbare Masse bildet. Die Masse wird in herkömmlicher Weise durch Hand- oder Maschinenstampfen zu Formkörpern verarbeitet, die nach dem Trocknen bei Temperaturen oberhalb 1400°C gebrannt werden.If high alumina slag is available in large quantities, it can be processed together with caustic burned magnesia and barium carbonate or hydroxide to form artificial stones that are equivalent to magnesite stones if they are mixed in such proportions that the molar ratio of Mg0: A1203 is between 0.5 and 2 and the Ba0 content is between 5 and 350 /. In this case, low-iron and low-silica bauxite can be used instead of slag. Example 1 To produce the stones, 1501, magnesia, 5001, high-alumina slag and 200 /, red mud are first carefully mixed. A sintered product is produced from it by firing at temperatures above 1400 ° C. This sinter is then crushed. Suitable grain sizes are sifted out of the break in accordance with the known grain size curves from Fuller, Andreasen or Litzow and mixed in a known ratio with a view to achieving the closest possible packing. 15% finely ground magnesite flour or 15% caustic magnesia are added to the mixture as a binding agent, as well as adhesive additives such as sulphite liquor, molasses or the like, and mixing water until a malleable mass is formed. The mass is processed in a conventional manner by hand or machine tamping into shaped bodies which, after drying, are fired at temperatures above 1400 ° C.
Beispiel 2 Es werden 1501, Magnesia, 5001, kieselsäurearmer, eisenreicher Bauxit und 200/, Rotschlamm gemischt, gesintert und anschließend zerkleinert. Der Sinter wird zusammen mit 15 °/o Magnesitmehl oder kaustisch gebrannter Magnesia als Bindemittel in der im Beispiel 1 geschilderten Weise zu Steinen geformt, die anschließend oberhalb 1400°C gebrannt werden.Example 2 1501, magnesia, 5001, low-silica, iron-rich bauxite and 200 /, red mud are mixed, sintered and then comminuted. The sinter is formed into stones together with 15% magnesite flour or caustic burned magnesia as a binder in the manner described in Example 1, which are then burned above 1400 ° C.
Beispiel 3 1501, Magnesia, 50"1(, hochtonerdehaltige Hüttenschlacke und 20 % Bariumhydroxyd werden gemischt, gesintert und anschließend zerkleinert. Der Sinter wird zusammen mit 150/0 Magnesitmehl oder kaustisch gebrannter Magnesia in der im Beispiel 1 geschilderten Weise zu Steinen geformt, die anschließend gebrannt werden.Example 3 1501, magnesia, 50 "1 (, high-alumina-containing slag and 20 % barium hydroxide are mixed, sintered and then comminuted. The sinter is formed into stones together with 150/0 magnesite flour or caustic magnesia in the manner described in Example 1 can then be fired.
Beispiel 4 150/0 Magnesia, 500/0 kieselsäurearmer, eisenarmer Bauxit und 20% Bariumkarbonat werden gemischt, gesintert und anschließend zerkleinert. Der Sinter wird i, zusammen mit 15 0/0 Magnesitmehl oder kaustisch gebrannter Magnesia in der im Beispiel 1 geschilderten Weise zu Steinen geformt, die anschließend gebrannt werden.Example 4 150/0 Magnesia, 500/0 Low Silica, Low Iron Bauxite and 20% barium carbonate are mixed, sintered and then crushed. The sinter is i, together with 15% magnesite flour or caustic burned magnesia Shaped into stones in the manner described in Example 1, which are then burned will.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DESCH35457A DE1209476B (en) | 1964-07-10 | 1964-07-10 | Artificial stone for the storage core of night storage heaters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DESCH35457A DE1209476B (en) | 1964-07-10 | 1964-07-10 | Artificial stone for the storage core of night storage heaters |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1209476B true DE1209476B (en) | 1966-01-20 |
Family
ID=7433500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DESCH35457A Pending DE1209476B (en) | 1964-07-10 | 1964-07-10 | Artificial stone for the storage core of night storage heaters |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1209476B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2477530A1 (en) * | 1980-03-06 | 1981-09-11 | Amiante | |
US4343989A (en) * | 1980-11-24 | 1982-08-10 | Brosnan Denis A | Magnesium oxide based heat storage device |
EP0058630A1 (en) * | 1981-01-27 | 1982-08-25 | Arbed S.A. | Method for the production of storage units suitable for storing thermal energy |
-
1964
- 1964-07-10 DE DESCH35457A patent/DE1209476B/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2477530A1 (en) * | 1980-03-06 | 1981-09-11 | Amiante | |
US4343989A (en) * | 1980-11-24 | 1982-08-10 | Brosnan Denis A | Magnesium oxide based heat storage device |
EP0058630A1 (en) * | 1981-01-27 | 1982-08-25 | Arbed S.A. | Method for the production of storage units suitable for storing thermal energy |
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