DE832565C - Dry mix for the production of magnesia cements - Google Patents
Dry mix for the production of magnesia cementsInfo
- Publication number
- DE832565C DE832565C DEK3934A DEK0003934A DE832565C DE 832565 C DE832565 C DE 832565C DE K3934 A DEK3934 A DE K3934A DE K0003934 A DEK0003934 A DE K0003934A DE 832565 C DE832565 C DE 832565C
- Authority
- DE
- Germany
- Prior art keywords
- magnesium
- production
- dry mix
- cements
- magnesium chloride
- 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.)
- Expired
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
- C04B9/00—Magnesium cements or similar cements
- C04B9/02—Magnesium cements containing chlorides, e.g. Sorel cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
Trockene Mischung für die Herstellung von Magnesiazementen Für die Herstellung von Magnesiazementen (Sorelzementen) für die verschiedensten Verwendungszwecke geht man allgemein von einem gebrannten kaustischen Magnesiumoxyd und von einer Magnesiumchloridlauge aus, die man unmittelbar vor der Verwendung an Ort und, Stelle mischt. Die Güte der erhaltenen Produkte hängt wesentlich von der sorgfältigen Innehaltung des Mengenverhältnisses und der Konzentration der Lauge sowie auch von der Sorgfalt ab, mit der diese Bestandteile, gegebenenfalls mit den Füllstoffen, innig vermischt werden. Es würde für die Magnesiazementherstellung und -verwendung eine wesentliche Erleichterung bedeuten, wenn man fertige trockene Mischungen der Hauptbestandteile zur Verfügung hätte. Das Magnesiumoxyd läßt sich jedoch nur mit weitgehend entwässertem Magnesiumchlorid in trockener Form aufbewahren, ohne daß beim Lagern ein wesentliches Abbinden der Bestandteile eintritt. Entwässertem Magnesiumoxychlorid selbst fehlt zunächst die Fähigkeit des Abbindens.Dry mix for the manufacture of magnesia cements For the Production of magnesia cements (Sorel cements) for a wide variety of uses one generally goes from a burnt caustic magnesia and from one Magnesium chloride solution, which you put on the spot immediately before use mixes. The quality of the products obtained depends largely on careful pause the proportions and the concentration of the lye as well as the care with which these components, optionally with the fillers, are intimately mixed will. It would become an essential one for magnesia cement manufacture and use Relief mean when you have ready-made dry mixes of the main ingredients would have available. The magnesium oxide can, however, only be obtained with largely dehydrated Store magnesium chloride in dry form with no essential during storage Setting of the components occurs. There is no dehydrated magnesium oxychloride itself first of all the ability to set.
Es ist nun gefunden worden, daß Mischungen von Magnesiumhydroxyd mit Magnesiumchlorid bald nach ihrer Herstellung sich ohne besondere Schwierigkeiten so weit entwässern lassen, daß neben gebildetem Oxychlorid vorwiegend Magnesiumhydroxyd und Magnesiumchlorid in freier Form in der Mischung erhalten bleiben. Diese Mischungen können dann mit Wasser oder je nach der gewünschten Zusammensetzung und dem Verwendungszweck des herzustellenden Zements auch mit Magnesiumoxyd oder Magnesiumchloridlösung oder beiden zugleich zu den erforderlichen Massen angerührt werden.It has now been found that mixtures of magnesium hydroxide with Magnesium chloride soon after its production turned out to be without any particular difficulty Let it drain so far that, in addition to the oxychloride formed, mainly magnesium hydroxide and magnesium chloride are retained in the mixture in free form. These mixes can then with water or depending on the desired composition and intended use of the cement to be produced also with magnesium oxide or magnesium chloride solution or both at the same time to be mixed to the required masses.
Es wurde dabei gefunden, daß überraschenderweise der Trocknungsprozeß der Massen schon bei Temperaturen von etwa i5o° sehr viel leichter vor sich geht wie das Trocknen einer gleichwertigen Menge von hochkonzentrierter Magnesiumchloridlösung, bis zu dem Entwässerungsgrad, der in den erfindungsgemäß hergestellten Massen vorliegt, so daß man leicht zu einem Magnesiumchlorid'hydrat bis unter Mg C12 # ,4 H20 kommt.It was found that, surprisingly, the drying process of the masses is much easier even at temperatures of about i5o ° than the drying of an equivalent amount of highly concentrated magnesium chloride solution, up to the degree of dehydration that is present in the masses produced according to the invention, so that one easily to a magnesium chloride hydrate up to Mg C12 #, 4 H20 .
Technisch kann man zu den erforderlichen Ausgangsmischungen von Magnesiumhydroxyd und Magnesiumchlorid auf verschiedenen Wegen gelangen, z. B.Technically, one can go to the required starting mixtures of magnesium hydroxide and magnesium chloride arrive in various ways, e.g. B.
i. Fällen von Magnesiumchloridlösungen mit kaustisch gebranntem Kalk nach Patent 687 785, Verdrängen des Calciumchlorids mit Magnesiumchloridlösungen und Trocknen des Produktes; 2. den nach i. erhaltenen Preßkuchen trägt man in konzentriertere Mg C1.-Lauge ein, läßt kurze Zeit abbinden, zerkleinert in noch knetbarer Beschaffenheit die erhaltene Masse und trocknet; 3. dig nach i vorgenommene Fällung wird statt mit Kalk mit kaustisch gebranntem Dolomit durchgeführt, im übrigen wird nach i. bzw. 2. vorgegangen. Diese Massen enthalten auch aus dem Dolomit bzw. den dolomitischen Kalken stammendes noch unverändertes Magnesiumoxyd.i. Precipitation of magnesium chloride solutions with caustic burnt lime according to patent 687 785, displacement of calcium chloride with magnesium chloride solutions and drying the product; 2. the after i. obtained press cake is carried in more concentrated Mg C1.-lye, allows to set for a short time, crushed to a still kneadable consistency the obtained mass and dry; 3. Precipitation carried out dig after i will take place carried out with lime with caustic burned dolomite, otherwise according to i. or 2. proceeded. These masses also contain from the dolomite or the dolomitic Magnesium oxide still unchanged from limescale.
Es ist schon vorgeschlagen worden, zur Vermeidung der Entmischung während des Erhärtens von Sorelzement der Chlormagnesiumlösung schleimige oder gallertbildende Körper zuzusetzen oder Magnesiumhydroxyd enthaltendes Chlormagnesium zu verwenden, das mit gebranntem Dolomit zu der üblichen Zementmischung verarbeitet wird. Abgesehen davon, daß bei diesem bekannten Verfahren der : Anteil des Magnesiumhydroxyds in der Mischung nur gering ist und nur den Zweck hat, eine Entmischung während des Verhärtens zu verhindern, ist eine Herstellung haltbarer trockner Mischungen gemäß dem neuen Verfahren aus Magnesiumhydroxyd und Chlormagnesium nicht vorgesehen.It has already been suggested to avoid segregation During the hardening of Sorel cement, the magnesium chloride solution becomes slimy or gelatinous Adding body or using magnesium hydroxide containing magnesium, which is processed with burnt dolomite into the usual cement mixture. Apart from that from the fact that in this known process: the proportion of magnesium hydroxide in the mixture is only slight and only has the purpose of segregation during the Preventing hardening is a preparation of durable dry mixes according to The new process from magnesium hydroxide and chlorine magnesium is not intended.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK3934A DE832565C (en) | 1942-03-24 | 1942-03-24 | Dry mix for the production of magnesia cements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK3934A DE832565C (en) | 1942-03-24 | 1942-03-24 | Dry mix for the production of magnesia cements |
Publications (1)
Publication Number | Publication Date |
---|---|
DE832565C true DE832565C (en) | 1952-02-25 |
Family
ID=7210086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK3934A Expired DE832565C (en) | 1942-03-24 | 1942-03-24 | Dry mix for the production of magnesia cements |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE832565C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2457264A1 (en) * | 1979-05-25 | 1980-12-19 | Kali & Salz Ag | PROCESS FOR THE PREPARATION OF A MAGNESIAN MORTAR AND MORTAR OBTAINED |
FR2622570A1 (en) * | 1987-11-02 | 1989-05-05 | Scient Tech Batimen Centre | MAGNESIAN CEMENTS COMPRISING A PARTIALLY HYDRATED MAGNESIUM SALT, AND A VERY REACTIVE MAGNESIA, MAGNETIC BINDERS WITH ACCELERATED AND IMPROVED WATER TENSION OBTAINED FROM SUCH CEMENTS, AND MATERIAL OBTAINED WITH SUCH A MAGNESIAN, NON-EXPANDED OR EXPANDED BINDER |
BE1002728A5 (en) * | 1989-01-05 | 1991-05-21 | Ct Scient Tech Batiment Cstb | Magnesian cements comprising a partially dehydrated magnesium salt and ahighly reactive magnesia, accelerated setting and enhanced water resistancemagnesian binders obtained from such cements and substance obtained withsuch a magnesian binder, non-expanded or expanded. |
GR890100077A (en) * | 1989-02-07 | 1991-06-28 | Centre Scient Tech Batiment | Magnesium cements comprising a partially deshydrated magnesium salt and a very reactive magnesia magnesium binders with accelerated getting and improved water resistance obtained from such cements and non expanded or expanded material obtained with such. |
-
1942
- 1942-03-24 DE DEK3934A patent/DE832565C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2457264A1 (en) * | 1979-05-25 | 1980-12-19 | Kali & Salz Ag | PROCESS FOR THE PREPARATION OF A MAGNESIAN MORTAR AND MORTAR OBTAINED |
FR2622570A1 (en) * | 1987-11-02 | 1989-05-05 | Scient Tech Batimen Centre | MAGNESIAN CEMENTS COMPRISING A PARTIALLY HYDRATED MAGNESIUM SALT, AND A VERY REACTIVE MAGNESIA, MAGNETIC BINDERS WITH ACCELERATED AND IMPROVED WATER TENSION OBTAINED FROM SUCH CEMENTS, AND MATERIAL OBTAINED WITH SUCH A MAGNESIAN, NON-EXPANDED OR EXPANDED BINDER |
EP0378010A1 (en) * | 1987-11-02 | 1990-07-18 | Centre Scientifique Et Technique Du Batiment | Magnesium cements and binders with accelerated setting and with enhanced water requirement obtained from such cements, and a material obtained from such a binder |
BE1002728A5 (en) * | 1989-01-05 | 1991-05-21 | Ct Scient Tech Batiment Cstb | Magnesian cements comprising a partially dehydrated magnesium salt and ahighly reactive magnesia, accelerated setting and enhanced water resistancemagnesian binders obtained from such cements and substance obtained withsuch a magnesian binder, non-expanded or expanded. |
GR890100077A (en) * | 1989-02-07 | 1991-06-28 | Centre Scient Tech Batiment | Magnesium cements comprising a partially deshydrated magnesium salt and a very reactive magnesia magnesium binders with accelerated getting and improved water resistance obtained from such cements and non expanded or expanded material obtained with such. |
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